JP2003073747A - Granulating agent for iron making and granulating method using the same - Google Patents
Granulating agent for iron making and granulating method using the sameInfo
- Publication number
- JP2003073747A JP2003073747A JP2001272461A JP2001272461A JP2003073747A JP 2003073747 A JP2003073747 A JP 2003073747A JP 2001272461 A JP2001272461 A JP 2001272461A JP 2001272461 A JP2001272461 A JP 2001272461A JP 2003073747 A JP2003073747 A JP 2003073747A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- iron
- making
- granulating
- molecular weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000003979 granulating agent Substances 0.000 title claims abstract description 41
- 239000002994 raw material Substances 0.000 claims abstract description 142
- 238000005469 granulation Methods 0.000 claims abstract description 92
- 230000003179 granulation Effects 0.000 claims abstract description 75
- 150000003384 small molecules Chemical class 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 44
- 239000000178 monomer Substances 0.000 claims description 50
- 150000001875 compounds Chemical class 0.000 claims description 35
- 239000002253 acid Substances 0.000 claims description 26
- 229920000642 polymer Polymers 0.000 claims description 23
- 230000000379 polymerizing effect Effects 0.000 claims description 8
- 238000005245 sintering Methods 0.000 abstract description 64
- 239000008188 pellet Substances 0.000 abstract description 24
- 238000005453 pelletization Methods 0.000 abstract description 9
- 238000009628 steelmaking Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 62
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 28
- 230000000694 effects Effects 0.000 description 28
- 238000004519 manufacturing process Methods 0.000 description 26
- -1 inorganic acid salt Chemical class 0.000 description 25
- 239000007864 aqueous solution Substances 0.000 description 20
- 229940048053 acrylate Drugs 0.000 description 14
- 239000000292 calcium oxide Substances 0.000 description 14
- 235000012255 calcium oxide Nutrition 0.000 description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 13
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 13
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 239000000843 powder Substances 0.000 description 12
- 239000011230 binding agent Substances 0.000 description 11
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 10
- 239000000839 emulsion Substances 0.000 description 10
- 239000004480 active ingredient Substances 0.000 description 9
- 150000002605 large molecules Chemical class 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 239000003505 polymerization initiator Substances 0.000 description 8
- 239000007771 core particle Substances 0.000 description 7
- 239000003995 emulsifying agent Substances 0.000 description 7
- 230000035699 permeability Effects 0.000 description 7
- 238000006116 polymerization reaction Methods 0.000 description 7
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 238000010556 emulsion polymerization method Methods 0.000 description 6
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 230000003472 neutralizing effect Effects 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 239000002202 Polyethylene glycol Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 239000000440 bentonite Substances 0.000 description 4
- 229910000278 bentonite Inorganic materials 0.000 description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 150000002894 organic compounds Chemical class 0.000 description 4
- 235000021317 phosphate Nutrition 0.000 description 4
- 229920001223 polyethylene glycol Polymers 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 3
- 239000003945 anionic surfactant Substances 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000002736 nonionic surfactant Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 235000019832 sodium triphosphate Nutrition 0.000 description 3
- 229920003169 water-soluble polymer Polymers 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 2
- JESXATFQYMPTNL-UHFFFAOYSA-N 2-ethenylphenol Chemical compound OC1=CC=CC=C1C=C JESXATFQYMPTNL-UHFFFAOYSA-N 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000012986 chain transfer agent Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- MSJMDZAOKORVFC-UAIGNFCESA-L disodium maleate Chemical compound [Na+].[Na+].[O-]C(=O)\C=C/C([O-])=O MSJMDZAOKORVFC-UAIGNFCESA-L 0.000 description 2
- IZZSMHVWMGGQGU-UHFFFAOYSA-L disodium;2-methylidenebutanedioate Chemical compound [Na+].[Na+].[O-]C(=O)CC(=C)C([O-])=O IZZSMHVWMGGQGU-UHFFFAOYSA-L 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- 235000013379 molasses Nutrition 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 229920001515 polyalkylene glycol Polymers 0.000 description 2
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 229940047670 sodium acrylate Drugs 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 239000001488 sodium phosphate Substances 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 229940074404 sodium succinate Drugs 0.000 description 2
- ZDQYSKICYIVCPN-UHFFFAOYSA-L sodium succinate (anhydrous) Chemical compound [Na+].[Na+].[O-]C(=O)CCC([O-])=O ZDQYSKICYIVCPN-UHFFFAOYSA-L 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 2
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 2
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- APWFVHHGZWXBPA-ODZAUARKSA-N (z)-but-2-enedioic acid;furan-2,5-dione Chemical compound O=C1OC(=O)C=C1.OC(=O)\C=C/C(O)=O APWFVHHGZWXBPA-ODZAUARKSA-N 0.000 description 1
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- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
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- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 description 1
- SCMVPOVMOHQFKU-UHFFFAOYSA-N 1-(aziridin-1-yl)prop-2-en-1-one Chemical compound C=CC(=O)N1CC1 SCMVPOVMOHQFKU-UHFFFAOYSA-N 0.000 description 1
- OSSNTDFYBPYIEC-UHFFFAOYSA-N 1-ethenylimidazole Chemical compound C=CN1C=CN=C1 OSSNTDFYBPYIEC-UHFFFAOYSA-N 0.000 description 1
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- YAJYJWXEWKRTPO-UHFFFAOYSA-N 2,3,3,4,4,5-hexamethylhexane-2-thiol Chemical compound CC(C)C(C)(C)C(C)(C)C(C)(C)S YAJYJWXEWKRTPO-UHFFFAOYSA-N 0.000 description 1
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- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 238000012726 Water-in-Oil Emulsion Polymerization Methods 0.000 description 1
- LXEKPEMOWBOYRF-UHFFFAOYSA-N [2-[(1-azaniumyl-1-imino-2-methylpropan-2-yl)diazenyl]-2-methylpropanimidoyl]azanium;dichloride Chemical compound Cl.Cl.NC(=N)C(C)(C)N=NC(C)(C)C(N)=N LXEKPEMOWBOYRF-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 229910052936 alkali metal sulfate Inorganic materials 0.000 description 1
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 1
- 150000001346 alkyl aryl ethers Chemical class 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 229940045714 alkyl sulfonate alkylating agent Drugs 0.000 description 1
- 150000008052 alkyl sulfonates Chemical class 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical group 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 150000007514 bases Chemical class 0.000 description 1
- ZPOLOEWJWXZUSP-AATRIKPKSA-N bis(prop-2-enyl) (e)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C\C(=O)OCC=C ZPOLOEWJWXZUSP-AATRIKPKSA-N 0.000 description 1
- ZPOLOEWJWXZUSP-WAYWQWQTSA-N bis(prop-2-enyl) (z)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C/C(=O)OCC=C ZPOLOEWJWXZUSP-WAYWQWQTSA-N 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- SIIVGPQREKVCOP-UHFFFAOYSA-N but-1-en-1-ol Chemical compound CCC=CO SIIVGPQREKVCOP-UHFFFAOYSA-N 0.000 description 1
- MPMBRWOOISTHJV-UHFFFAOYSA-N but-1-enylbenzene Chemical compound CCC=CC1=CC=CC=C1 MPMBRWOOISTHJV-UHFFFAOYSA-N 0.000 description 1
- 235000019437 butane-1,3-diol Nutrition 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 235000019838 diammonium phosphate Nutrition 0.000 description 1
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 1
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 1
- 238000012674 dispersion polymerization Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- UWLPCYBIJSLGQO-UHFFFAOYSA-N dodecanoic acid;propane-1,2,3-triol Chemical compound OCC(O)CO.CCCCCCCCCCCC(O)=O UWLPCYBIJSLGQO-UHFFFAOYSA-N 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- QTBWAKWPKYZSRL-UHFFFAOYSA-N ethenol;phenol Chemical group OC=C.OC1=CC=CC=C1 QTBWAKWPKYZSRL-UHFFFAOYSA-N 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethyl mercaptane Natural products CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229940063557 methacrylate Drugs 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- XONPDZSGENTBNJ-UHFFFAOYSA-N molecular hydrogen;sodium Chemical compound [Na].[H][H] XONPDZSGENTBNJ-UHFFFAOYSA-N 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 125000002270 phosphoric acid ester group Chemical group 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229960003975 potassium Drugs 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- 229960004109 potassium acetate Drugs 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- ONQDVAFWWYYXHM-UHFFFAOYSA-M potassium lauryl sulfate Chemical compound [K+].CCCCCCCCCCCCOS([O-])(=O)=O ONQDVAFWWYYXHM-UHFFFAOYSA-M 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 238000012673 precipitation polymerization Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000007717 redox polymerization reaction Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229960004249 sodium acetate Drugs 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- BTURAGWYSMTVOW-UHFFFAOYSA-M sodium dodecanoate Chemical compound [Na+].CCCCCCCCCCCC([O-])=O BTURAGWYSMTVOW-UHFFFAOYSA-M 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 229940082004 sodium laurate Drugs 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 235000019794 sodium silicate Nutrition 0.000 description 1
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229940117013 triethanolamine oleate Drugs 0.000 description 1
- UMFJXASDGBJDEB-UHFFFAOYSA-N triethoxy(prop-2-enyl)silane Chemical compound CCO[Si](CC=C)(OCC)OCC UMFJXASDGBJDEB-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 229960004418 trolamine Drugs 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- NLVXSWCKKBEXTG-UHFFFAOYSA-N vinylsulfonic acid Chemical compound OS(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
(57)【要約】
【課題】 製鉄用原料の水分を調節して造粒し擬似粒化
またはペレット化するのに好適に用いられる製鉄用造粒
処理剤およびこれを用いた造粒処理方法を提供する。
【解決手段】 製鉄用造粒処理剤として、例えば、２０
℃の水への溶解度が０．２重量％以上である、重量平均
分子量１０００以下の低分子化合物を水溶液の状態で、
微粉の鉄鉱石を含む製鉄用原料（焼結原料またはペレッ
ト原料）に添加することにより、該製鉄用原料を造粒処
理（擬似粒化またはペレット化）する。PROBLEM TO BE SOLVED: To provide a granulation treatment agent for iron making and a granulation treatment method using the same, which are preferably used for granulating by pseudo-granulation or pelletizing by adjusting the water content of a raw material for iron making. provide. SOLUTION: As a granulating agent for iron making, for example, 20
A low molecular weight compound having a weight average molecular weight of 1000 or less, having a solubility in water at
By adding to a steelmaking raw material (sintering raw material or pellet raw material) containing fine iron ore, the ironmaking raw material is subjected to a granulation treatment (pseudo-granulation or pelletization).
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、製鉄用原料となる
焼結鉱の製造方法またはペレットの製造方法に関わり、
製鉄用原料を造粒処理する際、特に製鉄用原料の水分を
調節して造粒し擬似粒化またはペレット化するのに好適
に用いられる製鉄用造粒処理剤およびこれを用いた造粒
処理方法に関するものである。TECHNICAL FIELD The present invention relates to a method for producing a sinter or a pellet as a raw material for iron making,
When granulating a raw material for iron making, in particular, a granulating agent for iron making and a granulating treatment using the same, which are preferably used for adjusting the water content of the raw material for iron making and granulating and quasi-granulating or pelletizing It is about the method.
【０００２】[0002]
【従来の技術】焼結鉱の製造においては、先ず焼結原料
となる鉄鉱石、副原料、燃料等を混合し、ドラムミキサ
ー、ペレタイザー、アイリッヒミキサー等の造粒機で水
分を調節しながら造粒して擬似粒子を造る。擬似粒子と
は、一般的に、０．５ｍｍ以下の微粒子が１〜３ｍｍの
核粒子に付着している粒子である。この際、造粒に求め
られる作用は、微粉粒子が核粒子の周りに付着する擬似
粒化性を向上すること、擬似粒子が焼成過程における湿
潤帯、乾燥帯等で崩壊し難いこと等である。焼結原料を
このように擬似粒子とすることで、焼結機上での焼結原
料充填層（焼結ベッド）中の通気性を向上し、焼結機の
生産性向上を図ることができる。2. Description of the Related Art In the production of sinter, first, iron ore, which is a sintering raw material, auxiliary raw materials, fuel, etc. are mixed, and the water content is adjusted with a granulator such as a drum mixer, a pelletizer or an Erich mixer. Granulate to create pseudo particles. Pseudo particles are generally particles in which fine particles of 0.5 mm or less are attached to core particles of 1 to 3 mm. At this time, the action required for granulation is to improve the pseudo-granulation property in which fine powder particles adhere around the core particles, and the pseudo-particles are hard to disintegrate in the wet zone, dry zone, etc. in the firing process. . By making the sintering raw material pseudo particles in this way, it is possible to improve the air permeability in the sintering raw material packed layer (sintering bed) on the sintering machine and improve the productivity of the sintering machine. .
【０００３】焼結原料を焼結する焼結機は下方吸引式を
採用しており、焼結原料の下側から吸引することによっ
て焼結に必要な空気を流通させると共に、焼結原料の上
側から下側へ向かって燃料を燃焼させることにより、焼
結原料を焼結するようになっている。このため、焼結原
料が微粉を多く含んでいると、目詰まりを起こす等して
通気性が低下し、燃料であるコークスの燃焼速度が遅く
なるので焼結機の生産効率が低下する。そこで、通気性
を改善すべく、焼結原料を造粒（擬似粒化）する等の事
前処理が必要である。該事前処理としては、例えば、焼
結原料に少量の水を添加して攪拌する等の造粒操作が行
われている。しかし、水だけを用いた造粒操作では、擬
似粒化性を向上させる効果が乏しいため、焼結原料に含
まれる微粉の量をあまり低減することができない。The sintering machine for sintering the sintering raw material adopts a downward suction type, and the air necessary for sintering is circulated by sucking from the lower side of the sintering raw material and at the upper side of the sintering raw material. The fuel is burned from the bottom to the bottom to sinter the sintering raw material. For this reason, when the sintering raw material contains a large amount of fine powder, the air permeability is lowered due to clogging or the like, and the combustion speed of coke, which is a fuel, is slowed down, so that the production efficiency of the sintering machine is lowered. Therefore, in order to improve air permeability, pretreatment such as granulating (pseudo-granulating) the sintering raw material is necessary. As the pretreatment, for example, a granulation operation such as adding a small amount of water to the sintering raw material and stirring is performed. However, in the granulation operation using only water, the effect of improving the pseudo-granulation property is poor, and therefore the amount of fine powder contained in the sintering raw material cannot be reduced so much.
【０００４】このために、従来から擬似粒化性を向上さ
せる対策として、焼結原料中に粘結剤として種々の造粒
添加剤を添加する方法が提案されている。造粒添加剤と
して用いられるものは、数多く知られている。例えば、
ベントナイト、リグニン亜硫酸塩（パルプ廃液）、澱
粉、砂糖、糖蜜、水ガラス、セメント、ゼラチン、カル
ボキシメチルセルロース等が結合剤或いは増粘剤とし
て、その使用が検討されている。これらは、焼結鉱の製
造において、その添加量が比較的多くて高コストとなる
ことや、使用する量の確保が困難である等の問題があ
り、工業的には使用されていない。For this reason, conventionally, as a measure for improving the pseudo-granulation property, a method of adding various granulating additives as a binder to the sintering raw material has been proposed. Many are known as granulating additives. For example,
Bentonite, lignin sulfite (pulp waste liquor), starch, sugar, molasses, water glass, cement, gelatin, carboxymethyl cellulose and the like have been studied for use as binders or thickeners. In the production of sinter, these are not industrially used because they have a problem that the amount added is relatively large and the cost is high, and it is difficult to secure the amount used.
【０００５】現在実用化されている造粒添加剤として
は、例えば、製鉄研究第２８８号（１９７６）９頁に開
示されている生石灰が広く使われている。これによる
と、生石灰の効果は、次のように示されている。第一
に、ミキサー内での擬似粒化の促進を図ることができ
る。第二に、擬似粒子よりなる焼結原料を特定の高さに
充填し、焼結ベッドを形成した後に表層に点火した後の
焼結過程において、乾燥、加熱する過程で擬似粒子が崩
壊することを防止し、焼結層中の均一な風の流れを保つ
ことができるとされている。As the granulating additive that is currently put into practical use, for example, quick lime disclosed in Iron Making Research No. 288 (1976) page 9 is widely used. According to this, the effect of quick lime is shown as follows. First, it is possible to promote pseudo-granulation in the mixer. Secondly, the pseudo-particles should be collapsed during the drying and heating process in the sintering process after filling the sintering raw material consisting of pseudo-particles to a specific height and igniting the surface layer after forming the sintering bed. It is said that the above can be prevented and a uniform wind flow in the sintered layer can be maintained.
【０００６】一方、ペレットの製造においては、原料と
なる鉄鉱石、ダスト、炭材等を混合した後、ペレタイザ
ー等の造粒機で水分を調節しながら造粒する。ペレット
とは、一般的に、１．０ｍｍ以下の粒子が固まって６．
０〜５０ｍｍの球状になった粒子を指す。この際、造粒
に求められる作用は、乾燥する前の生ペレットの状態で
の強度が高いこと、乾燥工程中や輸送工程中に破壊され
て粉化しないこと等である。そして、従来からペレット
の強度を向上させるために、微粉状の原料に造粒添加剤
としてベントナイトを１重量％以上加えて混練し、適量
の水を散布しながら造粒操作を行い、ペレットを製造す
る方法が提案されている。尚、ここで述べるペレットと
は、高炉原料、焼結原料、転炉原料等になるものであ
り、その製造方法等は、特に限定されるものではない。On the other hand, in the production of pellets, iron ore, dust, carbonaceous materials, etc., which are raw materials, are mixed and then granulated while controlling the water content with a granulator such as a pelletizer. Pellets generally mean that particles of 1.0 mm or less are solidified.
It refers to spherical particles of 0 to 50 mm. At this time, the action required for granulation is that the strength of the raw pellets before drying is high and that they are not broken and broken during the drying process or the transportation process. Then, in order to improve the strength of pellets, 1% by weight or more of bentonite as a granulation additive is added to a finely powdered raw material and kneaded, and a granulation operation is performed while spraying an appropriate amount of water to produce pellets. The method of doing is proposed. The pellets described here are blast furnace raw materials, sintering raw materials, converter raw materials, and the like, and the manufacturing method and the like are not particularly limited.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、焼結鉱
の製造においては、生石灰や糖蜜等のバインダーの使用
は、一般に高価であるために製造コストの上昇を招く。
また、生石灰を用いた造粒化は実用化されてはいるもの
の、生石灰は吸湿し易く、このとき発熱するため、取り
扱いに注意を要するという問題点を有している。また、
現在使用されている生石灰は、使用量を比較的多くしな
いと充分な効果が得られないため、コストが高くなる。
よって、その使用量を極力減少させて操業しているのが
現状である。そして、生石灰を２重量％以上添加して
も、その擬似粒化性の向上効果は頭打ちとなる傾向にあ
る。さらに、最近では、優良塊鉱の枯渇化と共に、粉鉱
石の劣質化も激しく、焼結原料の造粒性が以前よりも悪
化している問題がある。このために、生石灰添加による
造粒を実施しても、その効果が以前よりも小さくなって
いる。さらに、生石灰以外のバインダーは、焼結原料に
含まれる微粉の量を低減させる効果が不充分であり、焼
結ベッドの通気性を向上させて焼結時間を短縮する効果
が小さく、かつ、得られる焼結鉱の焼結鉱強度が弱い。
焼結鉱強度が弱い焼結鉱は、例えば焼結後の破砕時に微
粉が発生し易くなるので、返鉱が多くなり成品歩留が低
下し、その生産効率が低下する。このため、生石灰以外
のバインダーを用いた造粒化は実用化されていない。However, in the production of sinter, the use of a binder such as quicklime or molasses is generally expensive, which causes an increase in production cost.
Further, although granulation using quick lime has been put into practical use, quick lime easily absorbs moisture and generates heat at this time, so that there is a problem in that handling is required with caution. Also,
The quicklime currently used has a high cost because sufficient effect cannot be obtained unless the amount used is relatively large.
Therefore, it is the present situation that the amount used is reduced as much as possible. Even if 2% by weight or more of quick lime is added, the effect of improving the pseudo-granularity tends to reach the ceiling. Furthermore, recently, with the depletion of fine lump ores, the inferiority of powdered ores has become severe, and there is a problem that the granulation properties of sintering raw materials are worse than before. For this reason, even if granulation is performed by adding quick lime, the effect is smaller than before. Furthermore, binders other than quicklime have an insufficient effect of reducing the amount of fine powder contained in the sintering raw material, have a small effect of improving the air permeability of the sintering bed and shortening the sintering time, and The strength of the sintered ore is weak.
Sintered ore having low sinter strength has a tendency to generate fine powder when it is crushed after sintering, for example, resulting in a large amount of returned ore and a decrease in product yield and a decrease in production efficiency. Therefore, granulation using a binder other than quicklime has not been put to practical use.
【０００８】また、生石灰を使用した場合でも焼結原料
に含まれる微粉の量を低減させる効果はまだ充分とは言
えない状態である。Further, even when quick lime is used, the effect of reducing the amount of fine powder contained in the sintering raw material is still not sufficient.
【０００９】それゆえ、擬似粒化性を向上させる効果に
優れ、焼結機の生産効率を向上させることができる安価
なバインダー、つまり、焼結原料を造粒するのに好適に
用いることができるバインダー、および、これを用いた
造粒方法が求められている。Therefore, an inexpensive binder, which has an excellent effect of improving the pseudo-granulation property and can improve the production efficiency of the sintering machine, that is, can be suitably used for granulating a sintering raw material. There is a demand for a binder and a granulation method using the binder.
【００１０】一方、ペレットの製造において、ベントナ
イトを使用すると、膨潤性が大きいために造粒時に多量
の水分を添加する必要がある。このため、生ペレットは
柔らかいために変形し易く、乾燥工程時にガスの通気性
が悪化し、充分な乾燥を行うのに長時間を要したり、強
度が低下する問題がある。さらに、ベントナイト中には
シリコン等の不純物成分が多く含まれており、溶銑、溶
鋼中のスラグの増大を招く等の問題がある。On the other hand, when bentonite is used in the production of pellets, a large amount of water needs to be added at the time of granulation because of its large swelling property. Therefore, since the raw pellets are soft and easily deformed, the gas permeability is deteriorated during the drying process, and it takes a long time to perform sufficient drying and the strength is lowered. Further, bentonite contains a large amount of impurity components such as silicon, which causes a problem of increasing the amount of slag in the hot metal and molten steel.
【００１１】本発明は、上記従来の問題点に鑑みなされ
たものであり、その目的は、製鉄用原料を造粒処理する
のに好適に用いられる安価な製鉄用造粒処理剤およびこ
れを用いた造粒処理方法を提供することにある。The present invention has been made in view of the above conventional problems, and an object thereof is to provide an inexpensive granulation treatment agent for iron making which is preferably used for granulating a raw material for iron making and the use thereof. The present invention is to provide a conventional granulation treatment method.
【００１２】[0012]
【課題を解決するための手段】本発明の製鉄用造粒処理
剤は、上記の課題を解決するために、微粉の鉄鉱石を含
む製鉄用原料を造粒処理するのに用いる処理剤であっ
て、２０℃の水への溶解度が０．２重量％以上である、
重量平均分子量１０００以下の低分子化合物を含むこと
を特徴としている。The iron-making granulating agent of the present invention is a treating agent used for granulating an iron-making raw material containing fine iron ore in order to solve the above problems. And the solubility in water at 20 ° C. is 0.2% by weight or more,
It is characterized by containing a low molecular weight compound having a weight average molecular weight of 1,000 or less.
【００１３】本発明の製鉄用造粒処理剤は、上記の課題
を解決するために、微粉の鉄鉱石を含む製鉄用原料を造
粒処理するのに用いる処理剤であって、２０℃の水への
溶解度が０．２重量％以上である、重量平均分子量１０
００以下の低分子化合物と、酸基含有単量体を含む単量
体成分を重合してなる、１０００より大きい重量平均分
子量を有する高分子化合物とを含むことを特徴としてい
る。The granulating agent for iron making of the present invention is a treating agent used for granulating a raw material for iron making containing fine iron ore in order to solve the above-mentioned problems. Weight average molecular weight 10 having a solubility in 0.2% by weight or more
It is characterized by containing a low molecular weight compound of 00 or less and a high molecular weight compound obtained by polymerizing a monomer component containing an acid group-containing monomer and having a weight average molecular weight of more than 1000.
【００１４】本発明の造粒処理方法は、上記の課題を解
決するために、製鉄用原料を造粒処理する方法におい
て、上記の製鉄用造粒処理剤を、該製鉄用造粒処理剤中
に含まれる低分子化合物が、上記製鉄用原料に対して
０．００１重量％以上、５重量％以下の範囲内となるよ
うに上記製鉄用原料に添加することを特徴としている。In order to solve the above-mentioned problems, the granulation treatment method of the present invention is a method of granulating a raw material for iron manufacture, wherein the above-mentioned granulation treatment agent for iron manufacture is used in the granulation treatment agent for iron manufacture. The low molecular weight compound contained in is added to the iron-making raw material in an amount of 0.001% by weight or more and 5% by weight or less based on the iron-making raw material.
【００１５】[0015]
【発明の実施の形態】本発明にかかる製鉄用造粒処理剤
は、微粉の鉄鉱石を含む製鉄用原料（焼結原料またはペ
レット原料）を造粒処理するのに用いる処理剤であっ
て、２０℃の水への溶解度が０．２重量％以上である、
重量平均分子量１０００以下の低分子化合物を含む構成
である。また、本発明にかかる上記の製鉄用造粒処理剤
は、上記の低分子化合物の他に、酸基含有単量体を含む
単量体成分を重合してなる、１０００より大きい重量平
均分子量を有する高分子化合物を含む構成である。さら
に、本発明にかかる造粒処理方法は、製鉄用原料を混
合、調湿等して造粒処理する方法において、上記の製鉄
用造粒処理剤を、該製鉄用造粒処理剤中に含まれる上記
低分子化合物が、造粒処理される製鉄用原料に対して
０．００１重量％以上、１重量％以下の範囲内となるよ
うに添加する方法である。BEST MODE FOR CARRYING OUT THE INVENTION The granulating agent for iron making according to the present invention is a treating agent used for granulating a raw material for iron making (sintering raw material or pellet raw material) containing fine iron ore, The solubility in water at 20 ° C. is 0.2% by weight or more,
It is a structure containing a low molecular weight compound having a weight average molecular weight of 1,000 or less. Further, the above granulation treatment agent for iron making according to the present invention has a weight average molecular weight of more than 1000, which is obtained by polymerizing a monomer component containing an acid group-containing monomer in addition to the above low molecular weight compound. It is a structure including the polymer compound. Furthermore, the granulation treatment method according to the present invention is a method of mixing the iron-making raw materials, granulating by adjusting the humidity, etc., wherein the iron-making granulation treatment agent described above is contained in the iron-making granulation treatment agent. The above-mentioned low molecular weight compound is added so as to be in the range of 0.001% by weight or more and 1% by weight or less with respect to the iron-making raw material to be granulated.
【００１６】本発明において低分子化合物とは、重量平
均分子量１０００以下の有機または無機化合物を示す。
本発明において用いられる低分子化合物には、塩を形成
する等して水溶性を備えている有機または無機化合物が
用いられ、特に、２０℃の水への溶解度が０．２重量％
以上である低分子化合物を製鉄用造粒処理剤として使用
することで、微粉の鉄鉱石を含む製鉄用原料（焼結原料
またはペレット原料）を造粒処理（擬似粒化またはペレ
ット化）する際に、微粉粒子を核粒子の周りに付着させ
る効果に優れ、焼結機の生産効率を向上させることがで
きることを鋭意検討を重ねた結果、本発明者が見出した
ものである。In the present invention, the low molecular weight compound means an organic or inorganic compound having a weight average molecular weight of 1,000 or less.
The low molecular weight compound used in the present invention is an organic or inorganic compound having water solubility such as forming a salt, and particularly has a solubility in water at 20 ° C. of 0.2% by weight.
When using the above low-molecular compounds as a granulating agent for ironmaking, when granulating (pseudo-granulating or pelletizing) a raw material for iron manufacturing (sintering raw material or pellet raw material) containing fine iron ore In addition, the inventors of the present invention found out as a result of earnest studies that the effect of adhering the fine powder particles around the core particles is excellent and the production efficiency of the sintering machine can be improved.
【００１７】２０℃の水への溶解度が０．２重量％以上
である、重量平均分子量１０００以下の低分子化合物と
しては、具体的には、例えば、硫酸ナトリウム、硫酸カ
リウム、硫酸アンモニウム、硫酸カルシウム等の水溶性
硫酸塩；リン酸三ナトリウム、リン酸水素二カリウム、
リン酸水素二アンモニウム、トリポリリン酸ナトリウ
ム、ヘキサメタリン酸ナトリウム、ピロリン酸ナトリウ
ム等の水溶性リン酸塩；珪酸ナトリウム等の水溶性珪酸
塩；酢酸ナトリウム、酢酸アンモニウム、酢酸カリウ
ム、アクリル酸ナトリウム、メククリル酸カリウム、マ
レイン酸ナトリウム、コハク酸ナトリウム、イタコン酸
ナトリウム等の有機酸塩；エチレングリコール、ジエチ
レングリコール、トリエチレングリコール、プロピレン
グリコール等の水溶性ノニオン性有機化合物；等が挙げ
られる。これら低分子化合物は、一種類のみを用いても
よく、適宜二種類以上を用いてもよい。Specific examples of the low molecular weight compound having a weight average molecular weight of 1000 or less and having a solubility in water at 20 ° C. of 0.2% by weight or more are, for example, sodium sulfate, potassium sulfate, ammonium sulfate, calcium sulfate and the like. Water soluble sulfate of trisodium phosphate, dipotassium hydrogen phosphate,
Water-soluble phosphates such as diammonium hydrogen phosphate, sodium tripolyphosphate, sodium hexametaphosphate, and sodium pyrophosphate; water-soluble silicates such as sodium silicate; sodium acetate, ammonium acetate, potassium acetate, sodium acrylate, potassium meccrylate , Sodium maleate, sodium succinate, sodium itaconate, and the like; water-soluble nonionic organic compounds such as ethylene glycol, diethylene glycol, triethylene glycol, and propylene glycol; and the like. These low molecular weight compounds may be used alone or in an appropriate combination of two or more.
【００１８】上記低分子化合物としては、無機あるいは
有機の低分子化合物を用いることができ、上記した溶解
度を有するものであれば、特に限定されるものではない
が、好ましくは有機化合物が用いられる。これは、無機
酸塩を使用する場合、硫黄、燐、珪素等の、最終的に除
去すべき元素が混入するためであり、有機物の場合、焼
結操作で燃えて無くなるため、安価かつ容易に良好な製
鉄用造粒処理剤を得ることができるためである。The low molecular weight compound may be an inorganic or organic low molecular weight compound, and is not particularly limited as long as it has the above-mentioned solubility, but an organic compound is preferably used. This is because when an inorganic acid salt is used, elements such as sulfur, phosphorus, and silicon that should be finally removed are mixed in, and in the case of an organic substance, it burns out in the sintering operation and disappears, so it is cheap and easy. This is because it is possible to obtain a good ironing granulation treatment agent.
【００１９】上記低分子化合物は、そのまま、本発明に
かかる製鉄用造粒処理剤として使用することができる。
該低分子化合物は、本発明にかかる製鉄用造粒処理剤と
して、製鉄用原料（焼結原料またはペレット原料）に最
初から混合して用いてもよく、製鉄用原料の造粒処理に
用いる水に溶解して製鉄用原料に散布することにより用
いてもよい。製鉄用原料への上記低分子化合物の添加方
法のなかでも、上記低分子化合物を水溶液の状態にし
て、造粒機の添加水に混合する方法、または、攪拌され
ている製鉄用原料に噴霧する方法が簡便であり、均一に
添加することができるので特に好ましい。The above low molecular weight compound can be used as it is as a granulating agent for iron making according to the present invention.
The low molecular weight compound may be used as a granulating agent for iron making according to the present invention by being mixed with an iron making raw material (sintering raw material or pellet raw material) from the beginning, and water used for the granulating treatment of the iron making raw material. It may be used by being dissolved in and being sprayed on the raw material for iron making. Among the methods for adding the low-molecular weight compound to the iron-making raw material, the low-molecular weight compound is brought into an aqueous solution state and mixed with the water added to the granulator, or sprayed on the iron-making raw material being stirred. It is particularly preferable because the method is simple and can be added uniformly.
【００２０】上記低分子化合物は、製鉄用原料を造粒す
る際の擬似粒化性を向上させる効果に優れ、その使用量
がかなり少なくても上記擬似粒化性を向上させることが
できる。この結果、焼結機の生産効率を向上させること
ができ、焼結鉱を得るべく製鉄用原料を造粒処理するの
に好適に用いられる製鉄用造粒処理剤を安価に提供する
ことができる。The low molecular weight compound has an excellent effect of improving the pseudo-granulation property at the time of granulating the raw material for iron making, and the pseudo-granulation property can be improved even if the amount used is considerably small. As a result, the production efficiency of the sintering machine can be improved, and the iron-making granulating agent which is preferably used for granulating the iron-making raw material to obtain the sintered ore can be provided at a low cost. .
【００２１】製鉄用原料に対する上記低分子化合物の添
加量は、造粒すべき製鉄用原料あるいは用いる低分子化
合物の種類に応じて適宜設定すればよく、特に限定され
るものではないが、製鉄用原料に対して、０．００１重
量％以上、５重量％以下の範囲内であることが好まし
い。The amount of the low-molecular compound added to the iron-making raw material may be appropriately set according to the type of the iron-making raw material to be granulated or the low-molecular compound used, and is not particularly limited, but for iron-making It is preferably in the range of 0.001% by weight or more and 5% by weight or less with respect to the raw material.
【００２２】例えば、製鉄用原料が、特に焼結原料（鉄
鉱石、副原料、燃料等）である場合、焼結原料（鉄鉱
石、副原料、燃料等）に対する上記低分子化合物の添加
量は、特に限定されるものではないが、下限値が好まし
くは０．００１重量％であり、さらに好ましくは０．０
０５重量％であり、上限値が好ましくは１．０重量％で
あり、さらに好ましくは０．５重量％である。１．０重
量％を越えて上記低分子化合物を添加すると、造粒過多
となって焼結原料の固まりができてしまい、該焼結原料
の固まり内部への通気が阻害され、焼結されなくなる等
の悪影響が出てしまう。また、低分子化合物の添加量の
下限値は、焼結原料の鉱石の造粒性や、水分添加量、使
用する造粒機等によって左右されるが、できるだけ少量
となるように設計することが望ましい。For example, when the iron-making raw material is a sintering raw material (iron ore, auxiliary raw material, fuel, etc.), the addition amount of the above-mentioned low molecular weight compound to the sintering raw material (iron ore, auxiliary raw material, fuel, etc.) Although not particularly limited, the lower limit value is preferably 0.001% by weight, more preferably 0.0
It is 05% by weight, and the upper limit is preferably 1.0% by weight, more preferably 0.5% by weight. If the above-mentioned low molecular weight compound is added in an amount of more than 1.0% by weight, granulation becomes excessive so that the sintering raw material is solidified, and the ventilation of the sintering raw material inside the solidified mass is obstructed and the sintering is not performed. And so on. Further, the lower limit of the addition amount of the low molecular weight compound depends on the granulation property of the ore as the sintering raw material, the water addition amount, the granulator used, etc., but it should be designed to be as small as possible. desirable.
【００２３】また、製鉄用原料が、特にペレット原料
（鉄鉱石、ダスト、炭材等）である場合、ペレット原料
（鉄鉱石、ダスト、炭材等）に対する上記低分子化合物
の添加量は、特に限定されるものではないが、ある程度
の大きさの固まりをつくる必要があることから、下限値
が好ましくは０．００５重量％であり、さらに好ましく
は０．０１重量％であり、上限値が好ましくは５．０重
量％であり、さらに好ましくは２．０重量％である。
５．０重量％を越えて上記製鉄用造粒処理剤を添加する
と、造粒過多となってペレット原料の大きい固まりがで
きてしまい、該ペレット原料の粒径のバラツキが大きく
なる等の悪影響が出てしまう。また、上記製鉄用造粒処
理剤の添加量の下限値は、ペレット原料の造粒性や、水
分添加量、使用する造粒機等によって左右されるが、で
きるだけ少量となるように設計することが望ましい。When the iron-making raw material is a pellet raw material (iron ore, dust, carbonaceous material, etc.), the amount of the low-molecular compound added to the pellet raw material (iron ore, dust, carbonaceous material, etc.) is particularly Although not limited, the lower limit is preferably 0.005% by weight, more preferably 0.01% by weight, and the upper limit is preferable because it is necessary to form a lump of a certain size. Is 5.0% by weight, more preferably 2.0% by weight.
If the above-mentioned iron-making granulating agent is added in an amount of more than 5.0% by weight, granulation becomes excessive and a large mass of pellet raw material is formed, which causes adverse effects such as large variation in particle size of the pellet raw material. Will come out. Also, the lower limit of the amount of the iron-making granulation treatment agent depends on the granulating property of the pellet raw material, the amount of water added, the granulator used, etc., but it should be designed to be as small as possible. Is desirable.
【００２４】造粒機の添加水、つまり、製鉄用原料の造
粒処理に用いる水は、通常、製鉄用原料に対する水の割
合が、最終的に６〜８重量％となるように添加される
が、通常、製鉄用原料には、持ち込みによる水分（製鉄
用原料中に含まれる水分）が存在するため、持ち込みに
よる水分が多いと、後から添加することができる添加水
の量は、その分、少なくなる。このため、溶解度が低い
もの、具体的には、例えば溶解度が、０．２重量％以下
のものは、全て水に溶解しきらず、溶け残りが生じてし
まう。また、造粒効果は、一般に水溶性が高いものほど
高く現れる。The water added to the granulator, that is, the water used for the granulation treatment of the iron-making raw material is usually added so that the ratio of water to the iron-making raw material is finally 6 to 8% by weight. However, since the water for bringing in iron (water contained in the raw material for iron making) is usually present in the raw material for iron making, the amount of added water that can be added later will be , Less. For this reason, those having a low solubility, specifically, for example, those having a solubility of 0.2% by weight or less cannot be completely dissolved in water, and an undissolved residue occurs. Further, the granulation effect is generally higher as the water solubility is higher.
【００２５】このため、上記低分子化合物の、２０℃の
水への溶解度は、その下限値が０．２重量％であること
が好ましく、１重量％以上であることがより好ましく、
５重量％以上であることがより一層好ましい。Therefore, the lower limit of the solubility of the low molecular weight compound in water at 20 ° C. is preferably 0.2% by weight, more preferably 1% by weight or more,
It is even more preferably 5% by weight or more.
【００２６】例えば、製鉄用原料に対し、製鉄用造粒処
理剤として低分子化合物が０．０１重量％の割合で使用
される揚合、製鉄用原料の造粒処理に用いる水は、製鉄
用原料に対し、通常、７重量％の割合で用いられること
から、この場合の水に対する製鉄用造粒処理剤の量は、
０．１４％となる。For example, when a low molecular weight compound is used in an amount of 0.01% by weight as a granulating agent for iron making with respect to the raw material for iron making, water used for granulating the raw material for iron making is Since it is usually used in a ratio of 7% by weight with respect to the raw material, the amount of the granulating agent for iron making with respect to water in this case is
It becomes 0.14%.
【００２７】また、上記低分子化合物の重量平均分子量
は、２０以上、１０００以下であることが好ましい。ま
た、その下限値（重量平均分子量）は、４０であること
がより好ましく、その上限値（重量平均分子量）は、９
００であることがより好ましい。The weight average molecular weight of the low molecular weight compound is preferably 20 or more and 1000 or less. The lower limit (weight average molecular weight) is more preferably 40, and the upper limit (weight average molecular weight) is 9
It is more preferably 00.
【００２８】上記低分子化合物は、製鉄用原料を造粒
（擬似粒化またはペレット化）するバインダーとして作
用し、そのまま製鉄用造粒処理剤として用いることがで
きるが、必要に応じて、例えばその効果を助長若しくは
安定化させることを目的として、上記低分子化合物以外
の化合物と混合して用いてもよい。すなわち、本発明に
かかる製鉄用造粒処理剤は、有効成分として上記低分子
化合物を含み、製鉄用原料の造粒処理に際し、該製鉄用
造粒処理剤を、該製鉄用造粒処理剤中に含まれる上記低
分子化合物が、造粒処理される製鉄用原料に対して０．
００１重量％以上、１重量％以下の範囲内、より具体的
には、上述した割合となるように上記造粒処理される製
鉄用原料に添加しさえすればよく、上記低分子化合物以
外に、さらにその他の成分を含んでいても構わない。The above-mentioned low molecular weight compound acts as a binder for granulating (pseudo-granulating or pelletizing) the raw material for iron making, and can be used as it is as a granulating agent for iron making. For the purpose of promoting or stabilizing the effect, it may be used by mixing with a compound other than the above-mentioned low molecular weight compound. That is, the granulating agent for iron making according to the present invention contains the above-mentioned low molecular weight compound as an active ingredient, and in the granulating treatment of the raw material for iron making, the granulating agent for iron making is The low-molecular weight compound contained in No. 1 was added to the iron-making raw material to be granulated.
Within the range of 001% by weight or more and 1% by weight or less, and more specifically, it may be added to the iron-making raw material to be granulated so as to have the above-mentioned ratio. Further, it may contain other components.
【００２９】例えば、上記製鉄用造粒処理剤として、上
記した低分子化合物と、酸基含有単量体を含む単量体成
分を重合してなる、１０００より大きい重量平均分子量
を有する高分子化合物との混合物を用いることで、微粉
の鉄鉱石を含む製鉄用原料（焼結原料またはペレット原
料）を造粒処理（擬似粒化またはペレット化）する際
に、微粉粒子を核粒子の周りに付着させる効果にさらに
優れ、擬似粒子の平均粒径、ＧＩ指数を大きく増加させ
ることができ、焼結機の生産効率をより一層向上させる
ことができる製鉄用造粒処理剤を提供することができ
る。For example, a polymer compound having a weight average molecular weight of more than 1000, which is obtained by polymerizing the above-mentioned low molecular weight compound and a monomer component containing an acid group-containing monomer as the iron-making granulating agent. By using a mixture with, when the raw material for iron making (sintering raw material or pellet raw material) containing fine iron ore is granulated (pseudo-granulated or pelletized), fine powder particles are attached around the core particles. It is possible to provide an iron-making granulation treatment agent which is further excellent in the effect of making it possible, can greatly increase the average particle size of pseudo particles and the GI index, and can further improve the production efficiency of the sintering machine.
【００３０】上記高分子化合物は、造粒に使用される水
の粘度を上げ、バインダーとして働くため、上記低分子
化合物のみ使用した場合に比べ、造粒物の強度を高める
効果があり、結果的に擬似粒化性の向上効果をさらに高
める働きがある。The above-mentioned polymer compound increases the viscosity of water used for granulation and acts as a binder, so that it has the effect of increasing the strength of the granulated product as compared with the case where only the above-mentioned low-molecular compound is used. Has a function of further enhancing the effect of improving the pseudo-granulation property.
【００３１】本発明において用いられる上記高分子化合
物は、酸基含有単量体を単独で、あるいは、該酸基含有
単量体と共重合可能なその他の単量体と（共）重合する
ことにより得ることができる。The above-mentioned polymer compound used in the present invention may be obtained by copolymerizing the acid group-containing monomer alone or with another monomer copolymerizable with the acid group-containing monomer. Can be obtained by
【００３２】上記酸基含有単量体としては、具体的に
は、例えば、（メタ）アクリル酸、マレイン酸、無水マ
レイン酸、イタコン酸、クロトン酸等のカルボキシル基
含有単量体；ビニルスルホン酸、スチレンスルホン酸、
スルホエチル（メタ）アクリレート等のスルホ基含有単
量体；２−（メタ）アクリロイルオキシエチルアシッド
ホスフェート、２−（メタ）アクリロイルオキシプロピ
ルアシッドホスフェート、２−（メタ）アクリロイルオ
キシ−３−クロロプロピルアシッドホスフェート、２−
（メタ）アクリロイルオキシエチルフェニルホスフェー
ト等の酸性リン酸エステル基含有単量体；ビニルフェノ
ール等の石炭酸系単量体；並びにそれらの塩等を挙げる
ことができるが、特に限定されるものではない。これら
酸基含有単量体は、必要に応じて、一種類を用いてもよ
く、また、二種類以上を用いてもよい。Specific examples of the acid group-containing monomer include carboxyl group-containing monomers such as (meth) acrylic acid, maleic acid, maleic anhydride, itaconic acid and crotonic acid; vinyl sulfonic acid. , Styrene sulfonic acid,
Sulfo group-containing monomers such as sulfoethyl (meth) acrylate; 2- (meth) acryloyloxyethyl acid phosphate, 2- (meth) acryloyloxypropyl acid phosphate, 2- (meth) acryloyloxy-3-chloropropyl acid phosphate , 2-
Examples thereof include acidic phosphoric acid ester group-containing monomers such as (meth) acryloyloxyethylphenyl phosphate; carboxylic acid monomers such as vinylphenol; and salts thereof, but are not particularly limited. These acid group-containing monomers may be used alone or in combination of two or more, as required.
【００３３】上記例示の酸基含有単量体由来の酸基のう
ち、カルボキシル基および／またはその塩が好ましく、
（メタ）アクリル酸、マレイン酸、およびそれらの塩か
らなる群より選ばれる少なくとも一種のモノマーを上記
単量体成分の一つとして重合（共重合）させることによ
って導入されるものがさらに好ましい。Among the acid groups derived from the acid group-containing monomers exemplified above, a carboxyl group and / or a salt thereof is preferable,
A compound introduced by polymerizing (copolymerizing) at least one monomer selected from the group consisting of (meth) acrylic acid, maleic acid, and salts thereof as one of the above-mentioned monomer components is more preferable.
【００３４】上記酸基含有単量体として酸基含有単量体
の塩を使用する場合、その中和塩基としては、特に限定
されるものではないが、カリウムイオン、ナトリウムイ
オン等のアルカリ金属イオン；カルシウムイオン等のア
ルカリ土類金属イオン；アンモニウム、１級〜４級アミ
ン等の窒素含有塩基；等が挙げられる。When a salt of an acid group-containing monomer is used as the acid group-containing monomer, the neutralizing base is not particularly limited, but alkali metal ions such as potassium ion and sodium ion are used. Alkaline earth metal ions such as calcium ions; ammonium, nitrogen-containing bases such as primary to quaternary amines; and the like.
【００３５】また、上記酸基含有単量体と共重合可能な
その他の単量体としては、具体的には、例えば、（メ
タ）アクリル酸メチル、（メタ）アクリル酸エチル、
（メタ）アクリル酸ブチル等の、（メタ）アクリル酸と
炭素数１〜１８の一価アルコールとのエステル化物であ
る（メタ）アクリル酸アルキルエステル；シクロヘキシ
ル（メタ）アクリレート等の（メタ）アクリル酸シクロ
アルキルエステル；２−ヒドロキシエチル（メタ）アク
リレート、２−ヒドロキシプロピル（メタ）アクリレー
ト、（メタ）アクリル酸とポリプロピレングリコールと
のモノエステル化物、等のヒドロキシル基含有（メタ）
アクリル酸エステル；ポリエチレングリコールモノメタ
アクリル酸エステル、メトキシポリエチレングリコール
モノメタクリル酸エステル、メトキシポリエチレングリ
コールモノアクリル酸エステル等のポリアルキレングリ
コール（メタ）アクリル酸エステル；３−メチル−３−
ブテン−１−オールにエチレンオキサイドを付加してな
るポリアルキレングリコールモノアルケニルエーテル単
量体；アリルアルコールにエチレンオキサイドを付加し
てなるポリエチレングリコールモノエテニルエーテル単
量体；無水マレイン酸にポリエチレングリコールを付加
させたマレイン酸ポリエチレングリコールハーフエステ
ル；スチレン、ビニルトルエン、α−メチルスチレン、
エチルビニルベンゼン、クロロメチルスチレン、等のス
チレンおよびその誘導体；（メタ）アクリルアミド、Ｎ
−メチル（メタ）アクリルアミド、Ｎ−エチル（メタ）
アクリルアミド、Ｎ，Ｎ−ジメチル（メタ）アクリルア
ミド、等の（メタ）アクリルアミドおよびその誘導体；
酢酸ビニル；（メタ）アクリロニトリル；Ｎ−ビニル−
２−ピロリドン；ジメチルアミノエチル（メタ）アクリ
レート、ジメチルアミノエチル（メタ）アクリルアミ
ド、ジメチルアミノプロピル（メタ）アクリルアミド、
ビニルピリジン、ビニルイミダゾール等の塩基含有単量
体；Ｎ−メチロール（メタ）アクリルアミド、Ｎ−ブト
キシメチル（メタ）アクリルアミド等の、架橋性を有す
る（メタ）アクリルアミド系単量体；ビニルトリメトキ
シシラン、ビニルトリエトキシシラン、γ−（メタ）ア
クリロイルプロピルトリメトキシシラン、ビニルトリス
（２−メトキシエトキシ）シラン、アリルトリエトキシ
シラン等の、加水分解性を有する基がケイ素原子に直結
しているシラン系単量体；グリシジル（メタ）アクリレ
ート、グリシジルエーテル（メタ）アクリレート等のエ
ポキシ基含有単量体；２−イソプロペニル−２−オキサ
ゾリン、２−ビニル−２−オキサゾリン等のオキサゾリ
ン基含有単量体；２−アジリジニルエチル（メタ）アク
リレート、（メタ）アクリロイルアジリジン等のアジリ
ジン基含有単量体；フッ化ビニル、フッ化ビニリデン、
塩化ビニル、塩化ビニリデン等のハロゲン基含有単量
体：（メタ）アクリル酸と、エチレングリコール、ジエ
チレングリコール、プロピレングリコール、１，３−ブ
チレングリコール、ネオペンチルグリコール、１，６−
ヘキサンジオール、トリメチロールプロパン、ペンタエ
リスリトール、ジペンタエリスリトール等の多価アルコ
ールとのエステル化物等の、分子内に不飽和基を複数有
する多官能（メタ）アクリル酸エステル；メチレンビス
（メタ）アクリルアミド等の、分子内に不飽和基を複数
有する多官能（メタ）アクリルアミド；ジアリルフタレ
ート、ジアリルマレエート、ジアリルフマレート等の、
分子内に不飽和基を複数有する多官能アリル化合物；ア
リル（メタ）アクリレート；ジビニルベンゼン；等が挙
げられるが、特に限定されるものではない。これら単量
体は、必要に応じて、一種類を用いてもよく、また、二
種類以上を用いてもよい。As the other monomer copolymerizable with the acid group-containing monomer, specifically, for example, methyl (meth) acrylate, ethyl (meth) acrylate,
(Meth) acrylic acid alkyl ester, which is an esterified product of (meth) acrylic acid and a monohydric alcohol having 1 to 18 carbon atoms, such as butyl (meth) acrylate; (meth) acrylic acid such as cyclohexyl (meth) acrylate Cycloalkyl ester; hydroxyl group-containing (meth) such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, monoester product of (meth) acrylic acid and polypropylene glycol
Acrylic acid ester; Polyalkylene glycol (meth) acrylic acid ester such as polyethylene glycol monomethacrylic acid ester, methoxypolyethylene glycol monomethacrylic acid ester, methoxypolyethylene glycol monoacrylic acid ester; 3-methyl-3-
Polyalkylene glycol monoalkenyl ether monomer obtained by adding ethylene oxide to buten-1-ol; polyethylene glycol monoethenyl ether monomer obtained by adding ethylene oxide to allyl alcohol; polyethylene glycol added to maleic anhydride Maleic acid polyethylene glycol half ester; styrene, vinyltoluene, α-methylstyrene,
Styrene and its derivatives such as ethyl vinyl benzene and chloromethyl styrene; (meth) acrylamide, N
-Methyl (meth) acrylamide, N-ethyl (meth)
(Meth) acrylamide and its derivatives such as acrylamide, N, N-dimethyl (meth) acrylamide;
Vinyl acetate; (meth) acrylonitrile; N-vinyl-
2-pyrrolidone; dimethylaminoethyl (meth) acrylate, dimethylaminoethyl (meth) acrylamide, dimethylaminopropyl (meth) acrylamide,
Base-containing monomers such as vinylpyridine and vinylimidazole; cross-linkable (meth) acrylamide monomers such as N-methylol (meth) acrylamide and N-butoxymethyl (meth) acrylamide; vinyltrimethoxysilane, A silane-based monomer such as vinyltriethoxysilane, γ- (meth) acryloylpropyltrimethoxysilane, vinyltris (2-methoxyethoxy) silane, and allyltriethoxysilane in which a hydrolyzable group is directly bonded to a silicon atom. Body; epoxy group-containing monomers such as glycidyl (meth) acrylate and glycidyl ether (meth) acrylate; oxazoline group-containing monomers such as 2-isopropenyl-2-oxazoline and 2-vinyl-2-oxazoline; Aziridinylethyl (meth) acrylate, (meth Acrylate aziridine group-containing monomers such as acryloyl aziridine; vinyl fluoride, vinylidene fluoride,
Halogen group-containing monomers such as vinyl chloride and vinylidene chloride: (meth) acrylic acid and ethylene glycol, diethylene glycol, propylene glycol, 1,3-butylene glycol, neopentyl glycol, 1,6-
Polyfunctional (meth) acrylic acid esters having a plurality of unsaturated groups in the molecule such as esterified products with polyhydric alcohols such as hexanediol, trimethylolpropane, pentaerythritol, and dipentaerythritol; methylenebis (meth) acrylamide, etc. , Polyfunctional (meth) acrylamide having a plurality of unsaturated groups in the molecule; diallyl phthalate, diallyl maleate, diallyl fumarate, etc.,
Examples thereof include polyfunctional allyl compounds having a plurality of unsaturated groups in the molecule; allyl (meth) acrylate; divinylbenzene; etc., but are not particularly limited. These monomers may be used alone or in combination of two or more, as required.
【００３６】さらに、これら単量体の他に、分子量の調
節を目的として、連鎖移動剤を用いることもできる。該
連鎖移動剤としては、具体的には、例えば、メルカプト
エタノール、メルカプトプロピオン酸、ｔ−ドデシルメ
ルカプタン等のメルカプト基含有化合物；四塩化炭素；
イソプロピルアルコール；トルエン；等の連鎖移動係数
の高い化合物が挙げられる。In addition to these monomers, a chain transfer agent may be used for the purpose of adjusting the molecular weight. Specific examples of the chain transfer agent include mercapto group-containing compounds such as mercaptoethanol, mercaptopropionic acid, and t-dodecylmercaptan; carbon tetrachloride;
Compounds having a high chain transfer coefficient such as isopropyl alcohol; toluene;
【００３７】上記高分子化合物に占める上記酸基含有単
量体由来の単位の割合は、特に限定されるものではない
が、下限値が好ましくは１０モル％であり、さらに好ま
しくは２０モル％であり、上限値が好ましくは１００モ
ル％である。The ratio of the unit derived from the acid group-containing monomer in the polymer compound is not particularly limited, but the lower limit is preferably 10 mol%, more preferably 20 mol%. Yes, the upper limit is preferably 100 mol%.
【００３８】本発明にかかる該高分子化合物の製造方
法、つまり、酸基含有単量体を少なくとも含む前記単量
体成分の重合方法は、特に限定されるものではなく、従
来公知の種々の重合法、例えば、水中油型乳化重合法、
油中水型乳化重合法、懸濁重合法、分散重合法、沈澱重
合法、溶液重合法、水溶液重合法、塊状重合法等を採用
することができる。上記例示の重合方法の中でも、安全
性が高く、また、生産コスト（重合コスト）を低減化す
ることができることから、水溶液重合法、乳化重合法を
採用することが好ましい。The method for producing the polymer compound according to the present invention, that is, the method for polymerizing the monomer component containing at least the acid group-containing monomer is not particularly limited, and various conventionally known polymerization methods are used. Legal, for example, oil-in-water emulsion polymerization method,
The water-in-oil emulsion polymerization method, suspension polymerization method, dispersion polymerization method, precipitation polymerization method, solution polymerization method, aqueous solution polymerization method, bulk polymerization method and the like can be employed. Among the above-exemplified polymerization methods, it is preferable to employ the aqueous solution polymerization method or the emulsion polymerization method because the safety is high and the production cost (polymerization cost) can be reduced.
【００３９】上記の重合法に用いられる重合開始剤は、
熱または酸化還元反応によって分解し、ラジカル分子を
発生させる化合物であればよい。また、水溶液重合法を
採用する場合においては、水溶性を備えた重合開始剤が
好ましい。該重合開始剤としては、具体的には、例え
ば、過硫酸ナトリウム、過硫酸カリウム、過硫酸アンモ
ニウム等の過硫酸塩類；２，２’−アゾビス−（２−ア
ミジノプロパン）二塩酸塩、４，４’−アゾビス−（４
−シアノペンタン酸）等の水溶性アゾ化合物；過酸化水
素等の熱分解性開始剤；過酸化水素およびアスコルビン
酸、ｔ−ブチルハイドロパーオキサイドおよびロンガリ
ット、過硫酸カリウムおよび金属塩、過硫酸アンモニウ
ムおよび亜硫酸水素ナトリウム、等の組み合わせからな
るレドックス系重合開始剤；等が挙げられるが、特に限
定されるものではない。これら重合開始剤は、一種類の
みを用いてもよく、また、二種類以上を併用してもよ
い。なお、重合開始剤の使用量は、単量体成分の組成や
重合条件等に応じて適宜設定すればよい。The polymerization initiator used in the above polymerization method is
Any compound that decomposes by heat or a redox reaction to generate radical molecules may be used. Further, when the aqueous solution polymerization method is adopted, a water-soluble polymerization initiator is preferable. Specific examples of the polymerization initiator include persulfates such as sodium persulfate, potassium persulfate and ammonium persulfate; 2,2′-azobis- (2-amidinopropane) dihydrochloride, 4,4 '-Azobis- (4
-Cyanopentanoic acid) and other water-soluble azo compounds; thermal decomposition initiators such as hydrogen peroxide; hydrogen peroxide and ascorbic acid, t-butyl hydroperoxide and rongalite, potassium persulfate and metal salts, ammonium persulfate and sulfite. Examples thereof include a redox polymerization initiator composed of a combination of sodium hydrogen and the like, but are not particularly limited. These polymerization initiators may be used alone or in combination of two or more. The amount of the polymerization initiator used may be appropriately set according to the composition of the monomer components, the polymerization conditions and the like.
【００４０】乳化重合法を採用する場合において用いら
れる乳化剤としては、例えば、アニオン系界面活性剤、
ノニオン系界面活性剤、カチオン系界面活性剤、両性界
面活性剤、高分子界面活性剤、或いはこれらの反応性界
面活性剤等が挙げられるが、特に限定されるものではな
い。これら乳化剤は、必要に応じて、一種類を用いても
よく、また、二種類以上を組み合わせて用いてもよい。
尚、乳化剤を用いることなく、乳化重合を行うこともで
きる。The emulsifier used in the case of employing the emulsion polymerization method is, for example, an anionic surfactant,
Examples thereof include nonionic surfactants, cationic surfactants, amphoteric surfactants, polymeric surfactants, and reactive surfactants thereof, but are not particularly limited. These emulsifiers may be used alone or in combination of two or more, if necessary.
Emulsion polymerization can also be performed without using an emulsifier.
【００４１】アニオン系界面活性剤としては、具体的に
は、例えば、ナトリウムドデシルサルフェート、カリウ
ムドデシルサルフェート、アンモニウムアルキルサルフ
ェート等のアルキルサルフェート塩；ナトリウムドデシ
ルポリグリコールエーテルサルフェート；ナトリウムス
ルホリシノエート；スルホン化パラフィン塩、ナトリウ
ムドデシルベンゼンスルホネート、アルカリフェノール
ヒドロキシエチレンのアルカリ金属サルフェート、等の
アルキルスルホネート；長鎖アルキルナフタレンスルホ
ン酸塩；ナフタレンスルホン酸とホルムアルデヒドとの
縮合物；ラウリル酸ナトリウム、オレイン酸トリエタノ
ールアミン、アビエチン酸トリエタノールアミン等の不
飽和脂肪酸塩；ポリオキシアルキルエーテル硫酸エステ
ル塩；ポリオキシエチレンカルボン酸エステル硫酸エス
テル塩；ポリオキシエチレンフェニルエーテル硫酸エス
テル塩；コハク酸ジアルキルエステルスルホン酸塩、ポ
リオキシエチレンアルキルアリールサルフェート塩等
の、不飽和基を有する反応性アニオン乳化剤；等が挙げ
られる。これらアニオン系界面活性剤は、一種類のみを
用いてもよく、また、二種類以上を併用してもよい。Specific examples of the anionic surfactant include alkylsulfate salts such as sodium dodecyl sulfate, potassium dodecyl sulfate and ammonium alkyl sulfate; sodium dodecyl polyglycol ether sulfate; sodium sulforicinoate; sulfonation. Alkyl sulfonates such as paraffin salts, sodium dodecylbenzene sulfonate, alkali metal sulfates of alkali phenol hydroxyethylene, long-chain alkylnaphthalene sulfonates, condensates of naphthalene sulfonic acid and formaldehyde, sodium laurate, triethanolamine oleate, Unsaturated fatty acid salts such as abietic acid triethanolamine; polyoxyalkyl ether sulfate salts; polyoxy Chirenkarubon ester sulfates, polyoxyethylene phenyl ether sulfate; dialkyl succinate sulfonate, and polyoxyethylene alkylaryl sulfate salts, reactive anionic emulsifiers having an unsaturated group; and the like. These anionic surfactants may be used alone or in combination of two or more.
【００４２】ノニオン系界面活性剤としては、具体的に
は、例えば、ポリオキシエチレンアルキルエーテル；ポ
リオキシエチレンアルキルアリールエーテル；ソルビタ
ン脂肪族エステル、ポリオキシエチレンソルビタン脂肪
族エステル；グリセリンのモノラウレート等の、脂肪族
モノグリセライド；ポリオキシエチレン−ポリオキシプ
ロピレン共重合体；エチレンオキシドと、脂肪族アミ
ン、アミドまたは酸との縮合物；等が挙げられる。これ
らノニオン系界面活性剤は、一種類のみを用いてもよ
く、また、二種類以上を併用してもよい。Specific examples of the nonionic surfactant include polyoxyethylene alkyl ether; polyoxyethylene alkylaryl ether; sorbitan aliphatic ester, polyoxyethylene sorbitan aliphatic ester; glycerin monolaurate, etc. , An aliphatic monoglyceride; a polyoxyethylene-polyoxypropylene copolymer; a condensate of ethylene oxide with an aliphatic amine, amide or acid; and the like. These nonionic surfactants may be used alone or in combination of two or more.
【００４３】高分子界面活性剤としては、具体的には、
例えば、ポリビニルアルコールおよびその変性物；（メ
タ）アクリル酸系水溶性高分子、ヒドロキシエチル（メ
タ）アクリレート系水溶性高分子、ヒドロキシプロピル
（メタ）アクリレート系水溶性高分子（但し、本発明に
かかる共重合体とは異なる高分子）；ポリビニルピロリ
ドン；等が挙げられる。これら高分子界面活性剤は、一
種類のみを用いてもよく、また、二種類以上を併用して
もよい。Specific examples of the polymeric surfactant include:
For example, polyvinyl alcohol and its modified products; (meth) acrylic acid-based water-soluble polymer, hydroxyethyl (meth) acrylate-based water-soluble polymer, hydroxypropyl (meth) acrylate-based water-soluble polymer (however, according to the present invention Polymers different from copolymers); polyvinylpyrrolidone; and the like. These polymeric surfactants may be used alone or in combination of two or more.
【００４４】反応温度や反応時間等の重合条件は、単量
体成分の組成や重合開始剤の種類等に応じて適宜設定す
ればよいが、反応温度は０〜１００℃の範囲内であるこ
とがより好ましく、４０〜９５℃の範囲内であることが
さらに好ましい。また、反応時間は３〜１５時間程度が
好適である。乳化重合法、水溶液重合法を採用する場合
におけるモノマー組成物の反応系への供給方法として
は、例えば、一括添加法、分割添加法、成分滴下法、プ
レエマルション法、パワーフィード法、シード法、多段
滴下法等を行うことができるが、特に限定されるもので
はない。Polymerization conditions such as reaction temperature and reaction time may be appropriately set according to the composition of the monomer components and the type of polymerization initiator, but the reaction temperature is in the range of 0 to 100 ° C. Is more preferable, and it is further preferable that it is in the range of 40 to 95 ° C. The reaction time is preferably about 3 to 15 hours. Emulsion polymerization method, as a method of supplying the monomer composition to the reaction system when employing the aqueous solution polymerization method, for example, batch addition method, divided addition method, component dropping method, pre-emulsion method, power feed method, seed method, A multi-stage dropping method or the like can be performed, but the method is not particularly limited.
【００４５】このように酸基含有単量体を少なくとも含
む単量体成分を（共）重合させることにより、本発明に
かかる高分子化合物としての重合体が得られる。該重合
体の重量平均分子量は、１０００を超えて５００万以下
であることが好ましい。また、その下限値（重量平均分
子量）は、１５００であることがより好ましく、２００
０であることが特に好ましい。その上限値（重量平均分
子量）は、３００万であることがより好ましく、２００
万であることが特に好ましい。By (co) polymerizing the monomer component containing at least the acid group-containing monomer in this manner, a polymer as a polymer compound according to the present invention can be obtained. The weight average molecular weight of the polymer is preferably more than 1000 and 5 million or less. The lower limit value (weight average molecular weight) is more preferably 1,500,
It is particularly preferably 0. The upper limit (weight average molecular weight) is more preferably 3,000,000,
Particularly preferably,
【００４６】また、乳化重合法を採用した場合に得られ
るエマルションあるいは水溶液重合法を採用した場合に
得られるポリマー水溶液中に含まれる、上記重合体を含
む不揮発分の濃度は、６０重量％以下であることがより
好ましい。不揮発分の濃度が６０重量％を越えるエマル
ションあるいはポリマー水溶液は、粘度が高くなり過ぎ
ると共に、分散安定性を保つことができずに凝集を生じ
るおそれがある。The concentration of the non-volatile component containing the above polymer contained in the emulsion obtained when the emulsion polymerization method is used or in the polymer aqueous solution obtained when the aqueous solution polymerization method is used is 60% by weight or less. More preferably. An emulsion or polymer aqueous solution having a non-volatile content of more than 60% by weight may have too high a viscosity and may not be able to maintain dispersion stability, resulting in aggregation.
【００４７】また、乳化重合法を採用した場合に得られ
るエマルションに含まれる粒子の平均粒径は、３０ｎｍ
〜１００μｍの範囲内であることがより好ましく、５０
ｎｍ〜５０μｍの範囲内であることがさらに好ましい。
粒子の平均粒径が３０ｎｍ未満であるエマルションは、
粘度が高くなり過ぎると共に、分散安定性を保つことが
できずに凝集を生じるおそれがある。The average particle size of the particles contained in the emulsion obtained when the emulsion polymerization method is adopted is 30 nm.
Is more preferably in the range of
More preferably, it is in the range of nm to 50 μm.
An emulsion in which the average particle size of the particles is less than 30 nm is
When the viscosity becomes too high, dispersion stability may not be maintained and aggregation may occur.
【００４８】本発明において用いられる上記重合体は、
その少なくとも一部を塩基性の中和剤を用いて中和する
ことによって、或いは、そのままで（中和しなくと
も）、水に溶解または膨潤する。The above-mentioned polymer used in the present invention is
It is dissolved or swelled in water by neutralizing at least a part of it with a basic neutralizing agent or as it is (without neutralization).
【００４９】上記の中和剤としては、具体的には、例え
ば、水酸化ナトリウム、水酸化カリウム等のアルカリ金
属水酸化物；炭酸ナトリウム、炭酸水素ナトリウム、炭
酸アンモニウム、炭酸水素アンモニウム等の塩基性炭酸
塩；アンモニア水、モノエタノールアミン等の窒素含有
塩基；等が挙げられるが、特に限定されるものではな
い。Specific examples of the above-mentioned neutralizing agent include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; basic compounds such as sodium carbonate, sodium hydrogen carbonate, ammonium carbonate and ammonium hydrogen carbonate. Examples thereof include carbonates; nitrogen-containing bases such as aqueous ammonia and monoethanolamine; however, they are not particularly limited.
【００５０】このようにして得られた重合体、すなわち
高分子化合物を、前記低分子化合物と混合することによ
り、有効成分として上記低分子化合物と高分子化合物と
を含む、本発明にかかる製鉄用造粒処理剤を得ることが
できる。なお、上記低分子化合物と高分子化合物との混
合方法は、特に限定されるものではない。上記低分子化
合物と高分子化合物とは、予め混合してから製鉄用原料
に添加してもよく、別々に添加しても構わない。By mixing the polymer thus obtained, that is, the high molecular compound with the low molecular compound, the low molecular compound and the high molecular compound as an active ingredient are contained. A granulation treatment agent can be obtained. The method of mixing the low molecular weight compound and the high molecular weight compound is not particularly limited. The low molecular weight compound and the high molecular weight compound may be mixed in advance and then added to the iron-making raw material, or may be added separately.
【００５１】上記製鉄用造粒処理剤の使用方法、つま
り、製鉄用原料への上記製鉄用造粒処理剤の添加方法と
しては、特に限定されるものではなく、製鉄用原料への
前記低分子化合物からなる製鉄用造粒処理剤の添加方法
の説明において述べたように、該製鉄用造粒処理剤を、
製鉄用原料（焼結原料またはペレット原料）に最初から
混合して用いてもよく、製鉄用原料の造粒処理に用いる
水に溶解して製鉄用原料に散布することにより用いても
よい。この場合にも、上記製鉄用造粒処理剤は、水溶液
の状態にして、造粒機の添加水に混合、あるいは、攪拌
されている製鉄用原料に噴霧することが、簡便かつ均一
に添加することができるので特に好ましい。The method of using the iron-making granulating agent, that is, the method of adding the iron-making granulating agent to the iron-making raw material, is not particularly limited, and the low molecular weight compound to the iron-making raw material is not particularly limited. As described in the description of the method for adding the iron-making granulation treatment agent comprising a compound, the iron-making granulation treatment agent,
The raw material for iron making (sintering raw material or pellet raw material) may be used by being mixed from the beginning, or may be dissolved in water used for granulation of the raw material for iron making and then sprayed on the raw material for iron making. Also in this case, the above-mentioned iron-making granulation treatment agent is simply and uniformly added in the form of an aqueous solution, by mixing it with the additive water of the granulator or by spraying it on the stirred iron-making raw material. It is particularly preferable because it can be obtained.
【００５２】上記製鉄用造粒処理剤もまた、製鉄用原料
を造粒（擬似粒化またはペレット化）するバインダーと
して、製鉄用原料を造粒する際の擬似粒化性を向上させ
る効果に優れ、前記したように、その使用量がかなり少
なくても上記擬似粒化性を向上させることができる。こ
の結果、焼結機の生産効率を向上させることができ、焼
結鉱を得るべく製鉄用原料を造粒処理するのに好適に用
いられる製鉄用造粒処理剤を安価に提供することができ
る。The above-mentioned granulating agent for iron making is also excellent as a binder for granulating (pseudo-granulating or pelletizing) the iron-making raw material, and is excellent in the effect of improving the pseudo-granulating property when granulating the iron-making raw material. As described above, the pseudo-granulation property can be improved even if the amount used is considerably small. As a result, the production efficiency of the sintering machine can be improved, and the iron-making granulating agent which is preferably used for granulating the iron-making raw material to obtain the sintered ore can be provided at a low cost. .
【００５３】上記低分子化合物に対する高分子化合物の
添加量は、特に限定されるものではないが、例えば、上
記低分子化合物１００重量部に対して、５００重量部以
下の割合で用いることが好ましく、５重量部以上、４０
０重量部以下の範囲内で用いることがより好ましく、１
０重量部以上、３００重量部以下の範囲内で用いること
が特に好ましい。上記低分子化合物に対する高分子化合
物の割合が５００重量部を超えると、低分子化合物が有
する効果が得られ難く、擬似粒化性の向上効果が十分に
得られなくなるおそれがある。一方、上記低分子化合物
に対する高分子化合物の添加量が５重量部未満であれ
ば、上記高分子化合物を併用する効果に乏しく、上記高
分子化合物を併用することによる擬似粒化性の向上効果
が十分に発揮されないおそれがある。The amount of the polymer compound added to the low molecular weight compound is not particularly limited, but for example, it is preferably used in a ratio of 500 parts by weight or less relative to 100 parts by weight of the low molecular weight compound, 5 parts by weight or more, 40
It is more preferable to use within the range of 0 parts by weight or less, and 1
It is particularly preferable to use within the range of 0 parts by weight or more and 300 parts by weight or less. When the ratio of the high molecular weight compound to the low molecular weight compound exceeds 500 parts by weight, it is difficult to obtain the effect of the low molecular weight compound, and the effect of improving the pseudo-granulation property may not be sufficiently obtained. On the other hand, when the amount of the polymer compound added to the low molecular weight compound is less than 5 parts by weight, the effect of using the polymer compound together is poor, and the effect of improving the pseudo-granulation property by using the polymer compound together is low. May not be fully exerted.
【００５４】また、上記製鉄用造粒処理剤は、上記低分
子化合物、あるいは、上記低分子化合物と高分子化合物
とが有する性能、特に、これら低分子化合物、あるい
は、上記低分子化合物と高分子化合物とを、微粉の鉄鉱
石を含む製鉄用原料の造粒に用いた場合における擬似粒
化性の向上効果を阻害しない範囲内で、必要に応じて、
他の成分、例えば生石灰等の従来公知の他の造粒添加剤
等を併用しても構わない。The above-mentioned iron-making granulating agent has the properties possessed by the low-molecular weight compounds or the low-molecular weight compounds and the high-molecular weight compounds, particularly these low-molecular weight compounds or the low-molecular weight compounds and the high-molecular weight compounds. In the range where the compound and the effect of improving the pseudo-granulating property in the case of using the raw material for iron making containing fine iron ore for granulation are not impaired, if necessary,
Other components, for example, other conventionally known granulating additives such as quick lime may be used in combination.
【００５５】本発明にかかる上記製鉄用造粒処理剤が、
有効成分として上記低分子化合物のみまたは上記低分子
化合物と高分子化合物とを含む場合、該製鉄用造粒処理
剤中に含まれる上記有効成分の含有量（割合）は、製鉄
用原料の鉱石（鉄鉱石）の造粒性（種類）や、用いる化
合物の種類、使用する造粒機等に応じて適宜設定すれば
よく、特に限定されるものではないが、０．００１重量
％以上であることが好ましく、０．００５重量％以上で
あることがより好ましく、１００重量％、すなわち、上
記製鉄用造粒処理剤処理剤が、上記有効成分からなるこ
とが特に好ましい。上記低分子化合物の含有量が０．０
０１重量％未満であれば、擬似粒化性の向上効果が十分
に発揮されないおそれがある。The above-mentioned granulating agent for iron making according to the present invention,
When the low-molecular weight compound alone or the low-molecular weight compound and the high-molecular weight compound are contained as the active ingredient, the content (ratio) of the active ingredient contained in the granulating agent for iron-making is the ore (raw material for iron-making). Iron ore) may be appropriately set according to the granulating property (type) of the iron ore, the type of compound used, the granulating machine used, etc., and is not particularly limited, but 0.001% by weight or more Is more preferable, 0.005% by weight or more is more preferable, and 100% by weight, that is, it is particularly preferable that the treating agent for iron-making granulating agent comprises the above active ingredient. The content of the low-molecular compound is 0.0
If it is less than 01% by weight, the effect of improving the pseudo-granulation property may not be sufficiently exhibited.
【００５６】また、本発明にかかる上記製鉄用造粒処理
剤は、前記したように、造粒処理時に、該造粒処理に用
いる水を、該製鉄用造粒処理剤とは別に添加するか、あ
るいは、予め上記製鉄用造粒処理剤を水に溶解させるこ
とにより、水溶液の状態で上記製鉄用原料に添加するこ
とができる。また、上記製鉄用造粒処理剤は、さらに、
溶媒として水を含み、予め水溶液として用いることもで
きる。上記製鉄用造粒処理剤を水溶液の状態で添加する
場合に添加あるいは含有する水の量としては、造粒処理
時に用いられる水の量あるいはそれ以下となるように適
宜設定すればよく、特に限定されない。In addition, in the above-described iron-making granulation treatment agent, does the water used in the granulation treatment be added separately from the iron-making granulation treatment agent during the granulation treatment, as described above? Alternatively, by preliminarily dissolving the iron-making granulation treatment agent in water, it can be added to the iron-making raw material in the state of an aqueous solution. Further, the iron-making granulation treatment agent, further,
It can also be used in advance as an aqueous solution containing water as a solvent. The amount of water added or contained when the iron-making granulation treatment agent is added in the form of an aqueous solution may be appropriately set so as to be the amount of water used during the granulation treatment or less, and is particularly limited. Not done.
【００５７】何れの場合においても、製鉄用原料に対す
る、本発明にかかる製鉄用造粒処理剤の添加量（割合）
は、該製鉄用造粒処理剤中に含まれる上記低分子化合物
が、造粒処理される製鉄用原料に対して０．００１重量
％以上、１重量％以下の範囲内、具体的には、前述した
割合となるように設定すればよい。In any case, the addition amount (ratio) of the iron-making granulating agent of the present invention to the iron-making raw material
Is the low molecular weight compound contained in the granulating agent for iron making, within the range of 0.001% by weight or more and 1% by weight or less with respect to the iron making raw material to be granulated, specifically, It may be set so as to have the above-mentioned ratio.
【００５８】本発明によれば、造粒処理される製鉄用原
料に対する上記製鉄用造粒処理剤中の有効成分（上記低
分子化合物、もしくは上記低分子化合物と高分子化合物
との合計）の添加量（使用量）が０．１重量％以下、特
に、造粒処理される鉄鉱石に対する上記製鉄用造粒処理
剤中の有効成分の添加量（使用量）が０．１重量％以下
でも、造粒後の粒径が０．５ｍｍ以下の擬似粒子のＧＩ
指数が５５％以上、好適には７５％以上となる。また、
造粒後の粒径が０．２５ｍｍ以下の擬似粒子のＧＩ指数
が７５％以上、好適には８５％以上となる。すなわち、
本発明の製鉄用造粒処理剤は、造粒処理される製鉄用原
料に対する上記製鉄用造粒処理剤中の有効成分の添加量
（使用量）が０．１重量％以下、特に、造粒処理される
鉄鉱石に対する上記製鉄用造粒処理剤中の有効成分の添
加量（使用量）が０．１重量％以下でも、造粒後の粒径
が０．５ｍｍ以下の擬似粒子のＧＩ指数が５５％以上、
好適には７５％以上でかつ、造粒後の粒径が０．２５ｍ
ｍ以下の擬似粒子のＧＩ指数が７５％以上、好適には８
５％以上となる。According to the present invention, the addition of the active ingredient (the low molecular weight compound or the total of the low molecular weight compound and the high molecular weight compound) in the ironmaking granulation treatment agent to the ironmaking raw material to be granulated. The amount (use amount) is 0.1% by weight or less, and particularly, the addition amount (use amount) of the active ingredient in the iron-making granulation treatment agent to the iron ore to be granulated is 0.1% by weight or less, GI of pseudo particles having a particle size of 0.5 mm or less after granulation
The index is 55% or more, preferably 75% or more. Also,
The GI index of pseudo particles having a particle size of 0.25 mm or less after granulation is 75% or more, and preferably 85% or more. That is,
The granulation treatment agent for iron making of the present invention is such that the addition amount (usage amount) of the active ingredient in the above granulation treatment agent for iron making to the raw material for iron making to be granulated is 0.1% by weight or less, GI index of pseudo particles having a particle size after granulation of 0.5 mm or less, even if the addition amount (usage amount) of the active ingredient in the above granulation treatment agent for iron manufacturing to the iron ore to be treated is 0.1 wt% or less Is 55% or more,
It is preferably 75% or more and the particle size after granulation is 0.25 m.
The GI index of pseudo particles of m or less is 75% or more, preferably 8
It will be 5% or more.
【００５９】なお、造粒された擬似粒子のＧＩ指数と
は、核粒子の周りに付着する微粉粒子の割合を示す値で
あり、この値が大きいものほど造粒性が良好で、焼結時
の通気性が向上し、焼結鉱の通気性が向上し、焼結鉱の
生産効率が高くなる。ＧＩ指数の測定については、後述
する。The GI index of the granulated pseudo particles is a value indicating the ratio of fine powder particles adhering around the core particles. The larger this value is, the better the granulation property is and The air permeability of sinter is improved, the air permeability of sinter is improved, and the production efficiency of sinter is increased. The measurement of the GI index will be described later.
【００６０】また、本発明によれば、副原料や燃料等を
含む製鉄用原料の各銘柄の粒度分布、造粒性、組成等に
応じて、製鉄用原料の一部を混合・混練・造粒した後、
これを残りの製鉄用原料に混合・混練して造粒する処理
方法についても、本発明にかかる上記製鉄用造粒処理剤
を上記製鉄用原料に添加することにより、擬似粒化する
ことができる。例えば、製鉄用原料の一部が著しく全体
の造粒性を低下させている場合には、この難造粒性の製
鉄用原料に上記製鉄用造粒処理剤を添加することによ
り、擬似粒化することができる。従って、少量の処理剤
で製鉄用原料を効率的に造粒することができる。Further, according to the present invention, a part of the iron-making raw material is mixed, kneaded and produced according to the grain size distribution, the granulating property, the composition, etc. of each brand of the iron-making raw material including the auxiliary raw material, the fuel and the like. After granulating,
Also for the treatment method of mixing and kneading this with the rest of the iron-making raw material to granulate, pseudo-granulation can be performed by adding the iron-making granulating treatment agent according to the present invention to the iron-making raw material. . For example, when a part of the iron-making raw material remarkably lowers the overall granulation property, pseudo-granulation is performed by adding the iron-making granulating treatment agent to the difficult-to-granulate iron-making raw material. can do. Therefore, the iron-making raw material can be efficiently granulated with a small amount of the treating agent.
【００６１】このように、本発明にかかる上記製鉄用造
粒処理剤は、製鉄用原料や造粒機、添加するタイミング
や場所等の組み合わせを自由に選択することができ、従
ってその組み合わせは、特に限定されるものではない。
つまり、複数の処理工程を有し、処理剤と各処理方法と
を組み合わせる造粒処理方法についても、本発明にかか
る処理剤を製鉄用原料に添加することにより、擬似粒化
することができる。勿論、公知の擬似粒化方法（手段）
に対して、本発明にかかる処理剤を用いることもでき
る。As described above, in the iron-making granulation treatment agent according to the present invention, it is possible to freely select the combination of the iron-making raw material, the granulating machine, the timing and the place of addition, and therefore the combination is It is not particularly limited.
That is, a granulation treatment method having a plurality of treatment steps and combining a treatment agent and each treatment method can also be pseudo-granulated by adding the treatment agent according to the present invention to the iron-making raw material. Of course, known pseudo-granulation method (means)
On the other hand, the treating agent according to the present invention can also be used.
【００６２】[0062]
【実施例】以下、実施例および比較例により、本発明を
さらに詳細に説明するが、本発明はこれらにより何ら限
定されるものではない。実施例および比較例における平
均粒径およびＧＩ指数は、下記方法により測定した。
尚、実施例および比較例に記載の「部」は「重量部」を
示し、「％」は「重量％」を示す。The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these. The average particle size and GI index in the examples and comparative examples were measured by the following methods.
In the examples and comparative examples, "part" means "part by weight" and "%" means "% by weight".
【００６３】（平均粒径、ＧＩ指数）造粒操作を行って
得られた擬似粒子をふるいを用いて分級することによ
り、その粒度（擬似粒度）並びに平均粒径を求めた。造
粒された擬似粒子のＧＩ指数とは、製鉄研究第２８８号
（１９７６）９頁に開示されている評価方法の一つであ
り、前記したように核粒子の周りに付着する微粉粒子の
割合を示す。(Average particle size, GI index) The particle size (pseudo particle size) and average particle size were obtained by classifying the pseudo particles obtained by performing the granulation operation using a sieve. The GI index of the granulated pseudo particles is one of the evaluation methods disclosed in Iron Making Research No. 288 (1976), page 9, and as described above, the ratio of fine powder particles attached around the core particles. Indicates.
【００６４】以下に記載の実施例および比較例における
焼結原料並びにペレット原料は、全て、絶乾状態のもの
を使用した。All of the sintering raw materials and pellet raw materials used in the following Examples and Comparative Examples were in an absolutely dry state.
【００６５】〔実施例１〕本発明にかかる低分子化合物
としてのトリポリリン酸ナトリウム２２部を、水５４７
８部に添加してよく攪拌し、溶解することにより、本発
明にかかる製鉄用造粒処理剤としての低分子化合物水溶
液５５００部を得た。Example 1 22 parts of sodium tripolyphosphate as a low molecular weight compound according to the present invention was mixed with 547 of water.
By adding to 8 parts, stirring well, and dissolving, 5500 parts of an aqueous solution of a low-molecular compound as an iron-making granulating agent according to the present invention was obtained.
【００６６】同様に、本発明にかかる低分子化合物とし
ての、リン酸三ナトリウム、硫酸ナトリウム、珪酸ナト
リウム、アクリル酸ナトリウム、酢酸ナトリウム、マレ
イン酸ナトリウム、コハク酸ナトリウム、イタコン酸ナ
トリウム、およびエチレングリコールを、それぞれ２２
部ずつ、それぞれ水５４７８部に添加してよく攪拌し、
溶解することにより、本発明にかかる製鉄用造粒処理剤
としての低分子化合物水溶液各５５００部を得た。一
方、表１に示す組成を有する焼結原料（製鉄用原料）を
調製した。Similarly, trisodium phosphate, sodium sulfate, sodium silicate, sodium acrylate, sodium acetate, sodium maleate, sodium succinate, sodium itaconate and ethylene glycol as low molecular weight compounds according to the present invention are used. , Each 22
Parts by portion, each added to 5478 parts of water and stirred well,
By dissolving, 5500 parts each of a low molecular weight compound aqueous solution as a granulating agent for iron making according to the present invention was obtained. On the other hand, a sintering raw material (raw material for iron making) having the composition shown in Table 1 was prepared.
【００６７】[0067]
【表１】 [Table 1]
【００６８】上記の焼結原料７００００部をドラムミキ
サーに投入し、回転速度２４ｍｉｎ -1で１分間、予備攪
拌した。その後、同回転速度で攪拌しながら、該焼結原
料に、上記低分子化合物水溶液５２５０部を霧吹きを用
いて約１．５分間かけて噴霧した。焼結原料に対する上
記低分子化合物の割合は０．０３％であった。噴霧後、
さらに同回転速度で３分間攪拌することにより、造粒操
作を行った。70,000 parts of the above sintering raw material was drum-mixed.
Put into a sir and rotate at a speed of 24 min -1For 1 minute
I stirred. Then, while stirring at the same rotation speed,
5250 parts of the aqueous solution of the low-molecular compound is sprayed on the material
And sprayed for about 1.5 minutes. Top against sintering raw material
The ratio of the low molecular weight compound was 0.03%. After spraying
Further, by stirring for 3 minutes at the same rotation speed, the granulation operation
I made a work.
【００６９】得られた擬似粒子に含まれる水分を測定す
ると共に、該擬似粒子をふるいを用いて分級することに
より、平均粒径、並びに、造粒後の粒径が０．２５ｍｍ
以下の擬似粒子のＧＩ指数を求めた。この結果を、用い
た低分子化合物の分子量並びに溶解度と併せて表２に示
す。By measuring the water content in the obtained pseudo particles and classifying the pseudo particles using a sieve, the average particle size and the particle size after granulation are 0.25 mm.
The GI index of the following pseudo particles was determined. The results are shown in Table 2 together with the molecular weight and solubility of the low molecular weight compound used.
【００７０】〔実施例２〕滴下ロート、攪拌装置、窒素
ガス導入管、温度計、および還流冷却器を取り付けたフ
ラスコに、イオン交換水１９９．１部と、乳化剤（日本
乳化剤株式会社製、商品名；ニューコール７０７ＳＦ）
９．８部と、酸基含有単量体としてのスチレンスルホン
酸ナトリウム１１．７部とを仕込んだ。次いで、７５℃
で攪拌することにより、乳化剤を完全に溶解させると共
に、フラスコ内を窒索ガス置換した。一方、酸基含有単
量体としてのメタクリル酸１６４．３部と、その他の単
量体としてのアクリル酸メチル１１７．４部とからなる
モノマー組成物（単量体成分）を、乳化剤（同上）９．
８部およびイオン交換水４６０．５部に添加し、激しく
攪拌することによりプレエマルションを調製した。そし
て、該プレエマルションを滴下ロートに仕込んだ。Example 2 A flask equipped with a dropping funnel, a stirrer, a nitrogen gas inlet tube, a thermometer, and a reflux condenser was charged with 199.1 parts of ion-exchanged water and an emulsifier (manufactured by Nippon Emulsifier Co., Ltd. (Name; New Call 707SF)
9.8 parts and 11.7 parts of sodium styrenesulfonate as an acid group-containing monomer were charged. Then 75 ° C
By stirring with, the emulsifier was completely dissolved, and the inside of the flask was replaced with nitrogen gas. On the other hand, a monomer composition (monomer component) consisting of 164.3 parts of methacrylic acid as an acid group-containing monomer and 117.4 parts of methyl acrylate as another monomer was treated with an emulsifier (same as above). 9.
A pre-emulsion was prepared by adding 8 parts and 460.5 parts of ion-exchanged water and stirring vigorously. Then, the pre-emulsion was placed in a dropping funnel.
【００７１】次いで、フラスコ内の水溶液に、上記滴下
ロートからプレエマルション５２．６部を滴下し、７５
℃で５分間攪拌した。続いて、重合開始剤としての過硫
酸アンモニウム５％水溶液１３．７部をフラスコに投入
し、７５℃で２０分間攪拌することにより、初期重合を
行った。その後、反応温度を７５℃に保ちながら、滴下
ロートから残りのプレエマルション６９９．３部を２時
間かけて滴下した。滴下終了から３０分経過後、このフ
ラスコ内の水溶液に、還元剤として０．５％亜硫酸水素
ナトリウム水溶液１３．８部を添加し、さらに１時間重
合させた後、得られた反応液を冷卸して、共重合を終了
した。Next, 52.6 parts of the pre-emulsion was dropped into the aqueous solution in the flask from the dropping funnel,
The mixture was stirred at 0 ° C for 5 minutes. Subsequently, 13.7 parts of a 5% aqueous solution of ammonium persulfate as a polymerization initiator was placed in the flask and stirred at 75 ° C. for 20 minutes to carry out initial polymerization. Thereafter, while maintaining the reaction temperature at 75 ° C., 699.3 parts of the remaining pre-emulsion was added dropwise from the dropping funnel over 2 hours. After 30 minutes from the end of the dropping, 13.8 parts of a 0.5% sodium hydrogen sulfite aqueous solution as a reducing agent was added to the aqueous solution in the flask, and the mixture was further polymerized for 1 hour, and then the obtained reaction solution was cooled. Then, the copolymerization was completed.
【００７２】これにより、共重合体としてアクリル酸系
ポリマーを含む不揮発分の濃度が２９．９％であるエマ
ルションを得た。ＧＰＣ（ゲルパーミエーションクロマ
トグラフィー）を用いて測定した、本発明にかかる高分
子化合物としての上記共重合体の重量平均分子量は、約
１４０万であった。そして、得られたエマルション７
３．６部と、中和剤としての炭酸ナトリウム５．４部
と、本発明にかかる低分子化合物としてのトリポリリン
酸ナトリウム１４部とを水５４０７部に添加してよく攪
拌して溶解することにより、本発明にかかる製鉄用造粒
処理剤の水溶液５５００部を得た。As a result, an emulsion containing a non-volatile component containing an acrylic acid polymer as a copolymer and having a concentration of 29.9% was obtained. The weight average molecular weight of the copolymer as the polymer compound according to the present invention measured by GPC (gel permeation chromatography) was about 1.4 million. And the obtained emulsion 7
By adding 3.6 parts, 5.4 parts of sodium carbonate as a neutralizing agent, and 14 parts of sodium tripolyphosphate as a low molecular weight compound according to the present invention to 5407 parts of water and thoroughly stirring to dissolve Then, 5500 parts of an aqueous solution of the iron-making granulation treatment agent according to the present invention was obtained.
【００７３】得られた擬似粒子に含まれる水分を測定す
ると共に、擬似粒子をふるいを用いて分級することによ
り、平均粒径、並びに、造粒後の粒径が０．２５ｍｍ以
下の擬似粒子のＧＩ指数を求めた。この結果を、用いた
低分子化合物および高分子化合物の分子量並びに用いた
低分子化合物の溶解度と併せて表２に示す。By measuring the water content in the obtained pseudo particles and classifying the pseudo particles using a sieve, the average particle size and the pseudo particles having a particle size after granulation of 0.25 mm or less can be obtained. The GI index was calculated. The results are shown in Table 2 together with the molecular weights of the low molecular weight compounds and the high molecular weight compounds used and the solubilities of the low molecular weight compounds used.
【００７４】〔比較例１〕実施例１と同じ焼結原料７０
０００部に水５２５０部を添加することにより、造粒操
作を行った。得られた擬似粒子に含まれる水分を測定す
ると共に、該擬似粒子をふるいを用いて分級することに
より、平均粒径、並びに、造粒後の粒径が０．２５ｍｍ
以下の擬似粒子のＧＩ指数を求めた。この結果をまとめ
て表２に示す。Comparative Example 1 The same sintering raw material 70 as in Example 1
The granulation operation was carried out by adding 5250 parts of water to 000 parts. By measuring the water content in the obtained pseudo particles and classifying the pseudo particles using a sieve, the average particle size and the particle size after granulation are 0.25 mm.
The GI index of the following pseudo particles was determined. The results are summarized in Table 2.
【００７５】〔比較例２〕実施例１と同じ焼結原料７０
０００部をドラムミキサーに投入すると共に、該焼結原
料に、該焼結原料に対する割合が１．５％となるように
生石灰１０５０部を添加し、回転速度２４ｍｉｎ-1で１
分間、予備攪拌した。その後、同回転速度で攪拌しなが
ら、該焼結原料に水５６００部をスプレーを用いて約
１．５分間かけて噴霧した。噴霧後、さらに同回転速度
で３分間攪拌することにより、造粒操作を行った。得ら
れた擬似粒子に含まれる水分を測定すると共に、該擬似
粒子をふるいを用いて分級することにより、平均粒径、
並びに、造粒後の粒径が０．２５ｍｍ以下の擬似粒子の
ＧＩ指数を求めた。この結果を、用いた生石灰の分子量
並びに溶解度と併せて表２に示す。Comparative Example 2 The same sintering raw material 70 as in Example 1
While adding 000 parts to a drum mixer, 1050 parts of quick lime was added to the sintering raw material so that the ratio to the sintering raw material was 1.5%, and the mixture was stirred at a rotation speed of 24 min -1 for 1 minute.
Pre-stirred for a minute. Then, while stirring at the same rotation speed, 5600 parts of water was sprayed onto the sintering raw material for about 1.5 minutes using a sprayer. After spraying, granulation was performed by further stirring at the same rotation speed for 3 minutes. By measuring the water content in the obtained pseudo particles, by classifying the pseudo particles using a sieve, the average particle size,
In addition, the GI index of pseudo particles having a particle size after granulation of 0.25 mm or less was obtained. The results are shown in Table 2 together with the molecular weight and solubility of the quicklime used.
【００７６】[0076]
【表２】 [Table 2]
【００７７】表２に示す結果から明らかなように、本発
明にかかる製鉄用造粒処理剤を少量用いることにより、
擬似粒子の平均粒径、ＧＩ指数を大きく増加させること
ができることが判った。この結果から、本発明にかかる
製鉄用造粒処理剤が焼結原料を擬似粒化するのに優れた
効果を発揮することが判ると共に、本発明にかかる製鉄
用造粒処理剤を少量用いることにより、擬似粒子を焼結
してなる焼結鉱の生産率を向上させることが判る。As is clear from the results shown in Table 2, by using a small amount of the iron-making granulating agent according to the present invention,
It was found that the average particle size of the pseudo particles and the GI index can be greatly increased. From these results, it is found that the iron-making granulating agent according to the present invention exerts an excellent effect in pseudo-granulating the sintering raw material, and the iron-making granulating agent according to the present invention is used in a small amount. Thus, it is understood that the production rate of the sinter obtained by sintering the pseudo particles is improved.
【００７８】[0078]
【発明の効果】本発明にかかる製鉄用造粒処理剤は、以
上のように、２０℃の水への溶解度が０．２重量％以上
である、重量平均分子量１０００以下の低分子化合物を
含む構成である。INDUSTRIAL APPLICABILITY As described above, the iron-making granulating agent of the present invention contains a low molecular weight compound having a weight average molecular weight of 1,000 or less and having a solubility in water at 20 ° C. of 0.2% by weight or more. It is a composition.
【００７９】また、本発明にかかる製鉄用造粒処理剤
は、以上のように、２０℃の水への溶解度が０．２重量
％以上である、重量平均分子量１０００以下の低分子化
合物と、酸基含有単量体を含む単量体成分を重合してな
る、１０００より大きい重量平均分子量を有する高分子
化合物とを含む構成である。As described above, the iron-making granulating agent according to the present invention comprises a low molecular weight compound having a weight average molecular weight of 1000 or less and a solubility in water at 20 ° C. of 0.2% by weight or more. And a polymer compound having a weight average molecular weight of more than 1000, which is obtained by polymerizing a monomer component containing an acid group-containing monomer.
【００８０】本発明にかかる上記各高分子化合物は、微
粉の鉄鉱石を含む製鉄用原料（焼結原料またはペレット
原料）を造粒処理（擬似粒化またはペレット化）する際
に、微粉粒子を核粒子の周りに付着させる効果に優れ、
焼結機の生産効率を向上させることができ、それゆえ、
製鉄用造粒処理剤を安価に提供することができるという
効果を奏する。Each of the above-mentioned polymer compounds according to the present invention produces fine powder particles when granulating (pseudo-granulating or pelletizing) a raw material for iron making (sintering raw material or pellet raw material) containing fine iron ore. It has an excellent effect of adhering around the core particles,
The production efficiency of the sintering machine can be improved, and therefore
The granulating agent for iron making can be provided at low cost.
【００８１】上記の製鉄用造粒処理剤は、微粉の鉄鉱石
を含む製鉄用原料（焼結原料またはペレット原料）を造
粒処理（擬似粒化またはペレット化）する際に、微粉粒
子を核粒子の周りに付着させる効果に優れ、焼結機の生
産効率を向上させることができ、それゆえ、製鉄用造粒
処理剤を安価に提供することができるという効果を奏す
る。The above-mentioned granulating agent for ironmaking is used for granulating (pseudo-granulating or pelletizing) a raw material for ironmaking (sintering raw material or pellet raw material) containing fine iron ore, as a core of fine powder particles. The effect of adhering around the particles is excellent, the production efficiency of the sintering machine can be improved, and therefore, the granulating agent for iron making can be provided at low cost.
【００８２】本発明にかかる造粒処理方法は、以上のよ
うに、本発明にかかる上記製鉄用造粒処理剤を、該製鉄
用造粒処理剤中に含まれる低分子化合物が、上記製鉄用
原料に対して０．００１重量％以上、５重量％以下の範
囲内となるように上記製鉄用原料に添加する構成であ
る。As described above, the granulation treatment method according to the present invention is carried out by using the above-mentioned iron-making granulation treatment agent according to the present invention, wherein the low-molecular-weight compound contained in the iron-making granulation treatment agent is the iron-making granulation treatment agent. The composition is added to the raw material for iron making in an amount of 0.001% by weight or more and 5% by weight or less with respect to the raw material.
【００８３】これにより、焼結鉱を得るべく微粉の鉄鉱
石を含む製鉄用原料（焼結原料またはペレット原料）を
造粒処理（擬似粒化またはペレット化）するのに好適な
造粒処理方法を提供することができるという効果を奏す
る。Thus, a granulation treatment method suitable for granulating (pseudo-granulating or pelletizing) a raw material for iron making (sintering raw material or pellet raw material) containing fine iron ore to obtain a sintered ore. The effect of being able to provide.
フロントページの続き (72)発明者 細谷 陽三 千葉県富津市新富20−１ 新日本製鐵株式 会社内 (72)発明者 河野 克之 大阪府吹田市西御旅町５番８号 株式会社 日本触媒内 (72)発明者 中元 桂一 大阪府吹田市西御旅町５番８号 株式会社 日本触媒内 Ｆターム(参考） 4K001 AA10 CA18 Continued front page (72) Inventor Yozo Hosoya 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel shares In the company (72) Inventor Katsuyuki Kono 5-8 Nishiomitabicho, Suita City, Osaka Prefecture Within Nippon Shokubai (72) Inventor Keiichi Nakamoto 5-8 Nishiomitabicho, Suita City, Osaka Prefecture Within Nippon Shokubai F-term (reference) 4K001 AA10 CA18
Claims (3)
するのに用いる処理剤であって、 ２０℃の水への溶解度が０．２重量％以上である、重量
平均分子量１０００以下の低分子化合物を含むことを特
徴とする製鉄用造粒処理剤。1. A treating agent used for granulating a raw material for iron making containing fine iron ore, having a solubility in water at 20 ° C. of 0.2% by weight or more and a weight average molecular weight of 1,000 or less. A granulating agent for iron making, which comprises the low molecular weight compound of 1.
するのに用いる処理剤であって、 ２０℃の水への溶解度が０．２重量％以上である、重量
平均分子量１０００以下の低分子化合物と、 酸基含有単量体を含む単量体成分を重合してなる、１０
００より大きい重量平均分子量を有する高分子化合物と
を含むことを特徴とする製鉄用造粒処理剤。2. A treating agent used for granulating a raw material for iron making containing fine iron ore, having a solubility in water at 20 ° C. of 0.2% by weight or more and a weight average molecular weight of 1,000 or less. Formed by polymerizing the low molecular weight compound of 10 and a monomer component containing an acid group-containing monomer.
A granulating agent for iron making, comprising a polymer compound having a weight average molecular weight of greater than 00.
造粒処理剤中に含まれる低分子化合物が、上記製鉄用原
料に対して０．００１重量％以上、５重量％以下の範囲
内となるように上記製鉄用原料に添加することを特徴と
する造粒処理方法。3. A method for granulating a raw material for iron making, wherein the granulating agent for iron making according to claim 1 or 2 is a low molecular weight compound contained in the granulating agent for iron making. A granulation treatment method, which comprises adding to the above-mentioned iron-making raw material so as to be in the range of 0.001% by weight or more and 5% by weight or less of the raw material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007191748A (en) * | 2006-01-18 | 2007-08-02 | Nippon Steel Corp | Method for producing charcoal-containing pellets |
| JP2022092891A (en) * | 2020-12-11 | 2022-06-23 | 花王株式会社 | Additive for production of fine ore granule |
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| JPS5390116A (en) * | 1977-01-21 | 1978-08-08 | Nippon Steel Corp | Pelletizing method |
| JPS54142115A (en) * | 1978-03-31 | 1979-11-06 | Brasil Mineracoes Reunidas | Method of converting iron or manganese ore to sintering material |
| JPS54161512A (en) * | 1978-06-10 | 1979-12-21 | Kobe Steel Ltd | Lumped ore for iron making raw material |
| JPS61261417A (en) * | 1985-05-16 | 1986-11-19 | Shinagawa Refract Co Ltd | Composite filter for removing inclusion in molten steel |
| JPS62149825A (en) * | 1985-11-29 | 1987-07-03 | アライド・コロイド・リミテツド | Pelletizing of iron ore |
| JPH02228431A (en) * | 1988-12-30 | 1990-09-11 | Allied Colloids Ltd | Composition for pelletizing granular material and method therefor |
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2001
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4986208A (en) * | 1972-12-22 | 1974-08-19 | ||
| JPS5390116A (en) * | 1977-01-21 | 1978-08-08 | Nippon Steel Corp | Pelletizing method |
| JPS54142115A (en) * | 1978-03-31 | 1979-11-06 | Brasil Mineracoes Reunidas | Method of converting iron or manganese ore to sintering material |
| JPS54161512A (en) * | 1978-06-10 | 1979-12-21 | Kobe Steel Ltd | Lumped ore for iron making raw material |
| JPS61261417A (en) * | 1985-05-16 | 1986-11-19 | Shinagawa Refract Co Ltd | Composite filter for removing inclusion in molten steel |
| JPS62149825A (en) * | 1985-11-29 | 1987-07-03 | アライド・コロイド・リミテツド | Pelletizing of iron ore |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007191748A (en) * | 2006-01-18 | 2007-08-02 | Nippon Steel Corp | Method for producing charcoal-containing pellets |
| JP2022092891A (en) * | 2020-12-11 | 2022-06-23 | 花王株式会社 | Additive for production of fine ore granule |
| JP7374068B2 (en) | 2020-12-11 | 2023-11-06 | 花王株式会社 | Additives for producing fine ore granules |
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|---|---|
| JP4837850B2 (en) | 2011-12-14 |
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