CN102491770B - Wear-resisting castable refractory - Google Patents
Wear-resisting castable refractory Download PDFInfo
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- CN102491770B CN102491770B CN201110400326.XA CN201110400326A CN102491770B CN 102491770 B CN102491770 B CN 102491770B CN 201110400326 A CN201110400326 A CN 201110400326A CN 102491770 B CN102491770 B CN 102491770B
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- abrasion
- alumina
- refractory
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- 239000000463 material Substances 0.000 claims abstract description 57
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000000835 fiber Substances 0.000 claims abstract description 35
- 239000004568 cement Substances 0.000 claims abstract description 27
- 239000010431 corundum Substances 0.000 claims abstract description 22
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 150000004645 aluminates Chemical class 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 29
- 229910001570 bauxite Inorganic materials 0.000 claims description 28
- 239000003595 mist Substances 0.000 claims description 19
- 239000011819 refractory material Substances 0.000 claims description 17
- 239000010703 silicon Substances 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011734 sodium Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 8
- 239000004927 clay Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical group [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 claims description 5
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 5
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 abstract description 16
- 239000000843 powder Substances 0.000 abstract description 13
- 239000011575 calcium Substances 0.000 abstract description 6
- 229910052791 calcium Inorganic materials 0.000 abstract description 6
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000003746 solid phase reaction Methods 0.000 abstract description 2
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
- 238000010304 firing Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 abstract 1
- 229910052882 wollastonite Inorganic materials 0.000 abstract 1
- 239000010456 wollastonite Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 description 22
- 235000019832 sodium triphosphate Nutrition 0.000 description 16
- 101710194948 Protein phosphatase PhpP Proteins 0.000 description 8
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 description 8
- 238000005245 sintering Methods 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 7
- 238000001354 calcination Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 6
- 239000004571 lime Substances 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000010433 feldspar Substances 0.000 description 4
- 239000011021 lapis lazuli Substances 0.000 description 4
- 238000011418 maintenance treatment Methods 0.000 description 4
- -1 metallurgy Substances 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical group O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000007669 thermal treatment Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000003016 phosphoric acids Chemical class 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 229920004935 Trevira® Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000001488 sodium phosphate Substances 0.000 description 2
- 238000011282 treatment Methods 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
- 235000019801 trisodium phosphate Nutrition 0.000 description 2
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- HIGRAKVNKLCVCA-UHFFFAOYSA-N alumine Chemical compound C1=CC=[Al]C=C1 HIGRAKVNKLCVCA-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- CJDPJFRMHVXWPT-UHFFFAOYSA-N barium sulfide Chemical compound [S-2].[Ba+2] CJDPJFRMHVXWPT-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
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- 230000000593 degrading effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 1
- 229940038472 dicalcium phosphate Drugs 0.000 description 1
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000021321 essential mineral Nutrition 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
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- 229920005615 natural polymer Polymers 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 238000010008 shearing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229960001866 silicon dioxide Drugs 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- 239000012745 toughening agent Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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- Ceramic Products (AREA)
Abstract
The invention relates to a wear-resisting castable refractory. According to the wear-resisting castable refractory, special alumina is used as a coarse aggregate; the special alumina, silicon carbide and corundum are used as a fine aggregate; activated aluminium oxide micro powder, alumina micro powder, aluminate cement and wollastonite are used as micro powder; and an additive comprises steel fibers, organic fibers, a deflocculant and water. Solid-phase reaction is accelerated by the activated aluminium oxide micro powder, a calciclase-calcium aluminate-corundum composite combined phase is formed by medium-temperature heat treatment, the medium-temperature strength after firing is improved, and the medium-temperature wear resistance of the castable refractory is enhanced, so that the aim of reducing the cost of raw materials by replacing the corundum with alumina on the premise that the mechanical strength and wear resistance of materials are not influenced is fulfilled.
Description
Technical field
The present invention relates to refractory castable technical field, particularly the good refractory castable of a kind of wear resistance.
Background technology
Kiln is the equipment in order to calcining materials or burnt product being built into refractory materials.In many production industries such as building materials, metallurgy, chemical industry, environmental protection, use widely turning circle equipment to carry out machinery, physical or chemical treatment to solid materials, this kind equipment is called as rotary kiln.In social production, the effect of rotary kiln is extremely important, among the peoplely just spreads the folk rhyme of " as long as Dayao turns, just having 10,000,000 ".Rotary kiln is the main frame in manufacture of cement, is commonly called as " heart " of cement factory; In building material industry, rotary kiln, except calcination cement clinker, is also used for calcination clay, Wingdale and carry out slag drying etc.; During refractory materials is produced, adopt rotary kiln calcination raw material, make its dimensional stabilizing, strength increase, reprocessing moulding; In coloured and ferrous metallurgy, the metals such as iron, aluminium, copper, zinc, tin, nickel, tungsten, chromium, file be take rotary kiln as smelting equipment, and ore, concentrate, intermediate etc. are carried out to sintering, roasting; In ore dressing process, with rotary kiln, poor iron ore is carried out to magnetizing roasting, make the original weak magnetic of ore change into ferromagnetism, be beneficial to magnetic separation; In chemical industry, with rotary kiln, produce soda, calcination phosphate fertilizer, barium sulphide etc.
In the design of rotary kiln, the selection of kiln body each several part refractory materials is very important.Planner should, according to the difference of the particular cases such as the suffered thermal stresses of kiln body each several part, mechanical force, select different refractory materialss.
For example, the working temperature of kiln tail, grate cooler and the tertiary-air pipe of novel concrete dry method kiln does not have the working temperature at the positions such as kilneye high, but being subject to washing away, degrading of grit in the strong friction of kiln material and air-flow, is the position that is vulnerable to wearing and tearing most, therefore should use the good high-abrasive material of wear resistance.
At present, in wear-resistant castable field, prior art mainly relies on adds the high rigidity materials such as corundum, silicon carbide in mould material and makes unshape refractory obtain good wear resistance.For the material at high temperature using, to also justifiable.But this had both wasted resource the refractory materials using for middle low temperature, had increased again cost.So, need to develop the refractory castable again under a kind of cheap and middle cold condition with excellent abrasive resistance, to replace now widely used corundum wear-resistant castable.
CN101885617A discloses a kind of wear-resisting anti-erosion mould material and method thereof that adopts alumina-based homogeneous material to prepare, and belongs to refractory castable technical field.It is mullite that the present invention utilizes alumina-based homogeneous material chemical composition, structure homogeneous, stable performance, principal crystalline phase, linear change is little, on microcosmic, crystal mutually intert to form and has good hot strength, there is again the features such as certain snappiness simultaneously, improve the shortcoming that current alumine matter mould material medium temperature intensity is low, wear, alkali resistant aggressiveness is poor, effectively solved current High-Alumina and corundum pouring material medium temperature intensity is low, the problem of wear, alkali resistant, chlorine, sulphur corrosion poor performance.The wear-resisting anti-erosion mould material of preparing a kind of middle temperature excellent performance.Advantage is, the fluctuation of construction amount of water is little, use properties stable, has reduced the probability of local deterioration, increases the service life; Be widely used in the region of interest of the thermal kiln furnaces such as dry-process cement rotary kiln wicket cover, grate-cooler, tertiary-air pipe, decomposing furnace and other potteries, petrochemical industry.But intensity and wear resistance are not very desirable, and caking power is poor.
Summary of the invention
For the deficiencies in the prior art, one of object of the present invention is to provide the low-cost abrasion-proof and refractory pouring material of a kind of physical strength and wear resisting property excellence.
Abrasion-proof and refractory pouring material of the present invention is by usining high grade bauxite as coarse aggregate, silicon carbide and corundum are made fine aggregate, corundum strengthening matrix, add Reactive alumina acceleration solid state reaction, in process, warm processing forms lime feldspar-calcium hexaluminate-corundum mixed binding phase, improves the middle temperature of mould material and burns rear intensity, strengthen the middle temperature wear resistance of refractory castable, thereby reach with part alumina, replace corundum, reduce raw materials cost, do not affect again the object of mechanical strength and wear resistance.
Concrete, the present invention implements by following technical solution:
Abrasion-proof and refractory pouring material comprises coarse aggregate, fine aggregate, micro mist and an admixture, and wherein, coarse aggregate is high grade bauxite; Fine aggregate comprises high grade bauxite, silicon carbide and corundum; Micro mist comprises Reactive alumina, alumina micro mist, aluminate cement, silicon ash; Admixture comprises steel fiber, organic fibre, liquefactent and water.
" comprising " of the present invention, mean it except described component, can also comprise other components, these other components give described abrasion-proof and refractory pouring material different characteristics.In addition, " comprising " of the present invention, can also replace with enclosed " being " or " by ... form ".
Refractory materials is in order to reach desirable fireproof high-temperature resistant effect, must form the structure formation of what is called " dense accumulation ", this structure formation is that the micro mist in fine aggregate, filling aggregate and the powder space in coarse aggregate by occupying the large portion of material space, filling coarse-fine aggregate space obtains.Therefore to the particle diameter of refractory castable kinds of ingredients, select very important.
Preferably, in coarse aggregate of the present invention, high grade bauxite particle diameter is not less than 1mm;
Preferably, in fine aggregate of the present invention, the size of each component is 1mm-0.01mm;
Preferably, in micro mist of the present invention, the particle diameter of each component is not more than 0.01mm;
Alumina (aluminous soil; Bauxite) claim again bauxitic clay or bauxite, main component is aluminum oxide, is the hydrated aluminum oxide that contains impurity, is a kind of earthy mineral.White or canescence, because iron content is brown Huang or light red, density 3.9-4g/cm
3, Mohs' hardness 1-3, opaque, matter is crisp, and shock resistance is poor, extremely infusibilized, water insoluble, energy vitriolization, sodium hydroxide solution.And that alumina forms according to it is different, the difference of alumina content especially, have high grade bauxite, one-level alumina, secondary alumina minute.
Preferably, the present invention selects Al
2o
3the high grade bauxite that content is greater than 85%, for example content is 86%, 87%, 88%, 89%, 90%, 95% etc.The present invention's high grade bauxite used can be by commercially available acquisition.Each component and the relevant nature of high grade bauxite of the present invention are: Al
2o
3content is greater than 85%, CaO content and is less than 0.6, Fe
2o
3content is less than 1.4, and refractoriness is greater than 1790, and volume density is greater than 3.6.
Corundum is a kind of by aluminum oxide (Al
2o
3) the jewel that forms of crystallization, at fireproof high-temperature resistant Material Field, modal is fused corundom and alundum.Alundum refers to take that Calcined polishing aluminum oxide is as raw material, through levigate pellet or the base substrate made, the grog refractory that sintering forms under the high temperature of 1750-1900 ℃, has under close large, the void content low and high temperature of body and has fabulous heat-shock resistance and anti-slag action, the feature that crystal grain intensity is high.Fused corundom brick be in electric arc furnace by being cast to after aluminum oxide melting in the model of specified shape of appointment, by annealing, be incubated, then by the processing of diamond abrasive tool, obtain fused corundom brick.
Preferably, corundum of the present invention is refractory materials corundum, and preferably fused corundom, can be by commercially available acquisition or/and alundum.
Silicon carbide, has corrosion-resistant, high temperature resistant, the characteristic such as intensity is large, heat conductivility is good, shock resistance.In the present invention, adding silicon carbide is to utilize its high thermal conductivity to improve the heat-shock resistance of material, and by the oxidation of silicon carbide, at refractory surface, forms one deck SiO
2settling, shutoff pore and improve resistance to fouling.The present invention's silicon carbide used is commercially available refractory materials, can be by commercially available acquisition.
Alumina powder molecular formula is Al
2o
3, a kind of high-purity crystals forming through electric arc furnace high-temperature fusion recrystallize, color and luster is pure white, and its chemical stability is good, hardness 7.5, toughness is low.
Common alumina powder is difficult to sintering and causes the caking power of existing mould material poor.Conventionally, the cement mixing content of low cement deposit material is 7% left and right, and silicon ash volume is 4-5% left and right, and cement and the reaction of silicon ash form the lime feldspar of 11-13%.Below 1100 ℃, common alumina powder is difficult to sintering, and the total amount in conjunction with phase in mould material only has 11-13%, and because there is no the bonding aggregate of enough combinations and powder, the medium temperature intensity of refractory castable is not high, and wear resistance is poor, and work-ing life is not long.
The principal crystalline phase of activated alumina is α-Al
2o
3, in whole temperature range, there is not the phase transformation reaction of following volumetric shrinkage, it is the process of a volumetric expansion that reaction generates calcium hexaluminate itself.Therefore adopt the Reactive alumina that intermediate sintering temperature is good to replace common alumina powder, the refractory castable apparent porosity of cast is little, and the one-tenth in connection with agent is grouped into a little from CaO-Al simultaneously
2o
3-SiO
2three-part system corundum-mullite-lime feldspar phase region (occurring that liquidus temperature is 1510 ℃) moves into corundum-calcium hexaluminate-lime feldspar phase region (occurring that liquidus temperature is 1400 ℃).Thus, at the abundant sintering of refractory castable below 1100 ℃, form fine and close weave construction, obtain good intensity and wear resistance.
The present invention's Reactive alumina used is commercially available refractory materials, and particularly preferred physico-chemical property is d
50≤ 2.0 μ m, true density>=3.95g/cm
3, Na
2o is less than or equal to 0.1% Reactive alumina.Described Reactive alumina can be by commercially available acquisition.
Aluminate cement, claims again high-alumina cement, is that to take bauxitic clay and Wingdale be raw material, and what through calcining, make take the grog that calcium aluminate is main component, alumina content approximately 50%, the hydraulic cementing materials of regrinding and making.Aluminate cement Chang Weihuang or brown, also have grizzly.The essential mineral of aluminate cement becomes monocalcium aluminate (CaOAl2O3 writes a Chinese character in simplified form CA) and other aluminate, and a small amount of Dicalcium Phosphate (Feed Grade) (2CaOSiO2) etc.Aluminate cement is divided into CA-50, CA-60, CA-70, tetra-types of CA-80, and CA-70, CA-80 are called fine aluminium acid salt cement.In the mould material of cement, the effect of cement is: by hydration reaction, give the engineering time that mould material is enough; Under high temperature with Al
2o
3reaction forms calcium hexaluminate and makes mould material produce Ceramic bond.The present invention's cement used is aluminate cement, and described aluminate cement is commercially available refractory materials, can be by commercially available acquisition.
Silicon ash is the SiO producing when smelting ferrosilicon and industrial silicon
2with Si gas and the rapid a kind of ultra-fine siliceous powder body material that is oxidized also condensation and forms of airborne oxygen.In the present invention, add silicon ash that the source of silicon-dioxide can be provided for forming mullite.Described silicon ash is commercially available refractory materials, can be by commercially available acquisition.
Preferably, described alumina micro mist is that fineness is not less than 600 object bauxitic clay micro mists, for example, and 700 object bauxitic clay micro mists, 800 object bauxitic clay micro mists etc.
Fine powder, micro mist can good distribution when making mould material be shaped in casting process, and cement-silicon sol composite casting material has better mobility, and the present invention selects phosphoric acid salt as liquefactent.
Liquefactent raw material also claims water reducer or flocculation agent, refers under concrete workability and cement consumption permanence condition, can reduce mixing water amount, improve concrete strength; Or under workability and intensity permanence condition, save the admixture of cement consumption.
The present invention's liquefactent used is selected from phosphoric acid salt, the preferably combination in a kind or at least 2 in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, trisodium phosphate, tripoly phosphate sodium STPP for example, the combination of tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, the combination of tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, trisodium phosphate; Sodium hexametaphosphate 99 particularly preferably.Described phosphoric acid salt is commercially available industrial chemicals, can be by commercially available acquisition.
Steel fiber, take the light gage wire method of cutting off, cold-rolling strip steel shearing, steel ingot milling or molten steel rapid condensation method to make the fiber that length-to-diameter ratio is 40-80, is a kind of application toughener very widely.Heat-resistant steel fiber, claims again high-temperature fibre, stands high temperature still can substantially keep the man-made fiber of its original physical and mechanical properties in the long period.
With metallographic phase ratio, fragility is the deadly defect of refractory materials, and its tension fracture strain is minimum.Strong for construction globality, use in because the variation on temperature or volume more easily causes the mould material entity of stress concentration, in technique, introducing steel fiber is to play toughened and reinforced, to improve fracture toughness effective measure.In order to improve in performance the present invention such as ultimate compression strength, physical strength, bending strength, shock strength, impelling strength of mould material, add refractory materials steel fiber.The present invention's heat-resistant steel fiber used, can be by commercially available acquisition.
Organic fibre is the fiber of being made by organic polymer or the fiber that utilizes natural polymer to make through chemical treatment.Conventional have polypropylene fibre, trevira etc. with the organic fibre of refractory castable.Research shows, adds organic fibre in mould material, can increase the ventilation property of mould material.The present invention adds organic fibre effectively to prevent in bake process, and the physical damage of refractory materials, explosion, the problem such as come off.
The present invention's organic fibre used is explosion-proof organic fibre.Any fire-resistant explosion-proof organic fibre that those skilled in the art can be known, all can be used for the present invention, such as polypropylene fibre, trevira etc.
As optimal technical scheme, the abrasion-proof and refractory pouring material of the present invention by weight percentage quality sum of coarse aggregate, fine aggregate and micro mist (take be 100 parts) comprises following component:
Preferably, described abrasion-proof and refractory pouring material, the abrasion-proof and refractory pouring material of the present invention by weight percentage quality sum of coarse aggregate, fine aggregate and micro mist (take be 100 parts) comprises following component:
Quality percentage composition in described component is 0%, refer to and can not add respective components, for example, if 1-0.088mm silicon carbide addition 0-15wt%, represents that the interpolation scope of 1-0.088mm silicon carbide in formula is never to add 1-0.088mm silicon carbide to the 1-0.088mm silicon carbide that adds 15wt%.
Described each component all can be by commercially available acquisition, those skilled in the art can be known by number of ways the supplier of each component, and described supplier typical case but the example of non-limit have: company of Saint-Gobain (France), pottery company (Japan) of Toshiba, mineral processes company (U.S.), refractory materials research institute of Sinosteel Corporation company limited, Henan Province Zheng Tainai material company limited etc.
The present invention also aims to provide the purposes of a kind of abrasion-proof and refractory pouring material for high temperature kiln engineering.
Abrasion-proof and refractory pouring material provided by the present invention, being preferably used as middle low temperature uses, and the wadding at position easy to wear, described middle low temperature is that working temperature is less than 1400 ℃, such as 1380 ℃, 1350 ℃, 1300 ℃, 1250 ℃, 1100 ℃, 1000 ℃, 800 ℃, 600 ℃ etc.; Be particularly preferred for the wadding of kiln tail, grate-cooler and the tertiary-air pipe of dry method kiln.
The prepared abrasion-proof and refractory pouring material of the present invention has following beneficial effect:
(1) the present invention is extensive with resource, and low-cost alumina partly replaces corundum, under the prerequisite that does not affect kiln functions, reduces raw materials cost.
(2) the present invention replaces common alumina powder with the good Reactive alumina of intermediate sintering temperature, adjust formula simultaneously, as far as possible in connection with the one-tenth of agent, be grouped into and be a little placed in corundum-calcium hexaluminate-lime feldspar phase region (occurring that liquidus temperature is 1400 ℃), thereby make the mould material can be at 1100 ℃ of following fully sintering, form fine and close weave construction, obtain good intensity and wear resistance.
(3) raw materials used all can be by commercially available acquisition, very convenient.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art should understand, described embodiment helps to understand the present invention, should not be considered as concrete restriction of the present invention.
Embodiment mono-
(1) preparation of mould material:
Adopt 88 grades of high grade bauxite 15% of 8-5mm, 5-1mm88 level high grade bauxite 40%, 1-0.088mm silicon carbide 12%, < 0.088mm lapis amiridis 15%, Reactive alumina 5%, 800 order alumina micro mist 2%, fine aluminium acid salt cement 7%, silicon ash 4%.Additional: heat-resistant steel fiber 1.5%, organic fibre 0.1%, tripoly phosphate sodium STPP 0.15%, water 5%.By said ratio, each raw material is weighed, is accompanied and, obtain the slurry of good fluidity, after shaping, maintenance and thermal treatment, test physicals.
(2) quantitative measurement:
After 110 ℃ * 24h is dried, folding strength 22.4MPa, compressive strength 164.7MPa;
After 1100 ℃ * 3H processes, folding strength 18.4MPa, compressive strength 149.5MPa, line changes-0.06%;
After 1350 ℃ * 3H processes, folding strength 19.4MPa, compressive strength 161.3MPa, line changes-0.23%;
Wear resistance 4.17cm
3.
From the above, made refractory castable has suitable physical strength and wear resistance, and research has reached with part high grade bauxite and replaced corundum and silicon carbide, reduces the object of raw materials cost.
Embodiment bis-
(1) preparation of mould material:
Adopt 88 grades of high grade bauxite 15% of 8-5mm, 5-1mm high grade bauxite 40%, 1-0.088mm high grade bauxite 12%, < 0.088mm lapis amiridis 11%, Reactive alumina 5%, 800 order alumina micro mist 6%, high-alumina cement 7%, silicon ash 4%.Additional: heat-resistant steel fiber 1.5%, organic fibre 0.1%, tripoly phosphate sodium STPP 0.15%, water 5%.By said ratio, each raw material is weighed, is accompanied and, obtain the slurry of good fluidity, after shaping, maintenance and thermal treatment, test physicals.
(2) physicals detects:
After 110 ℃ * 24h is dried, folding strength 20.8MPa, compressive strength 150.4MPa;
After 1100 ℃ * 3H processes, folding strength 15.8MPa, compressive strength 127.4MPa, line changes-0.15%;
After 1350 ℃ * 3H processes, folding strength 15.7MPa, compressive strength 145.7MPa, line changes-0.24%;
Wear resistance 3.53cm
3.
Embodiment tri-
(1) preparation of mould material:
Adopt 88 grades of high grade bauxite 15% of 8-5mm, 5-1mm88 level high grade bauxite 35%, 1-0.088mm88 level high grade bauxite 7%, < 0.088mm lapis amiridis 20%, Reactive alumina 8%, high-alumina cement 9%, silicon ash 6%.Additional: heat-resistant steel fiber 3%, tripoly phosphate sodium STPP 0.1%, water 4%.By said ratio, each raw material is weighed, is accompanied and, obtain the slurry of good fluidity, after shaping, maintenance and thermal treatment, test physicals.
(2) physicals detects:
After 110 ℃ * 24h is dried, folding strength 19.8MPa, compressive strength 152.8MPa;
After 1100 ℃ * 3H processes, folding strength 15.2MPa, compressive strength 131.4MPa, line changes-0.17%;
After 1350 ℃ * 3H processes, folding strength 18.7MPa, compressive strength 155.3MPa, line changes-0.20%;
Wear resistance 4.71cm
3.
As from the foregoing, made refractory castable has suitable physical strength and wear resistance, and research has reached with part high grade bauxite and replaced corundum, reduces the object of raw materials cost.
Embodiment tetra-
(1) preparation of mould material:
Adopt 87 grades of high grade bauxite 8% of 8-5mm, 5-1mm87 level high grade bauxite 55%, 1-0.088mm87 level high grade bauxite 15%, < 0.088mm lapis amiridis 10%, Reactive alumina 3%, 800 order alumina micro mist 2%, high-alumina cement 4%, silicon ash 3%.Additional: heat-resistant steel fiber 1.5%, tripoly phosphate sodium STPP 0.15%, water 4.5%.By said ratio, each raw material is weighed, is accompanied and, obtain the slurry of good fluidity, after shaping, maintenance and thermal treatment, test physicals.
(2) physicals detects:
After 110 ℃ * 24h is dried, folding strength 16.5MPa, compressive strength 147.9MPa;
After 1100 ℃ * 3H processes, folding strength 13.1MPa, compressive strength 127.7MPa, line changes-0.13%;
After 1350 ℃ * 3H processes, folding strength 15.8MPa, compressive strength 150.8MPa, line changes-0.15%;
Wear resistance 3.98cm
3.
As from the foregoing, made refractory castable has suitable physical strength and wear resistance, and research has reached with part high grade bauxite and replaced corundum, reduces the object of raw materials cost.
Applicant's statement, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to the selection of the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, concrete mode etc., within all dropping on protection scope of the present invention and open scope.
Claims (7)
1. an abrasion-proof and refractory pouring material, comprises coarse aggregate, fine aggregate, micro mist and admixture, it is characterized in that: coarse aggregate is high grade bauxite; Fine aggregate comprises high grade bauxite, silicon carbide and corundum; Micro mist comprises Reactive alumina, alumina micro mist, aluminate cement, silicon ash; Admixture comprises steel fiber, organic fibre, liquefactent and water;
Described abrasion-proof and refractory pouring material, the quality sum of coarse aggregate, fine aggregate and micro mist of take is 100%, composed of the following components:
Al in high grade bauxite in described coarse aggregate and fine aggregate
2o
3content is greater than 85%;
In described coarse aggregate, high grade bauxite particle diameter is not less than 1mm;
In described fine aggregate, the size of each component is 1mm-0.01mm;
Described Reactive alumina is that physico-chemical property is d
50≤ 2.0 μ m, true density>=3.95g/cm
3, Na
2o is less than or equal to 0.1% Reactive alumina;
Described alumina micro mist is that fineness is not less than 600 object bauxitic clay micro mists;
In described micro mist, the particle diameter of each component is not more than 0.01mm;
Described liquefactent is selected from Sodium hexametaphosphate 99;
Described steel fiber is heat-resistant steel fiber;
Described organic fibre is the explosion-proof organic fibre of refractory materials;
Described corundum is refractory materials corundum.
2. abrasion-proof and refractory pouring material as claimed in claim 1, is characterized in that, described corundum is that fused corundom is or/and alundum.
3. abrasion-proof and refractory pouring material as claimed in claim 1, is characterized in that, described Reactive alumina is refractory materials Reactive alumina.
4. the abrasion-proof and refractory pouring material as described in claim 1～3 any one, is characterized in that, described abrasion-proof and refractory pouring material, and the quality sum of coarse aggregate, fine aggregate and micro mist of take is 100%, comprises following component:
5. a purposes for the abrasion-proof and refractory pouring material as described in claim 1～4 any one, is characterized in that, described abrasion-proof and refractory pouring material is for high temperature kiln engineering.
6. purposes as claimed in claim 5, is characterized in that, described abrasion-proof and refractory pouring material is used as middle low temperature, and the wadding at position easy to wear.
7. purposes as claimed in claim 5, is characterized in that, described abrasion-proof and refractory pouring material is for the wadding of kiln tail, grate-cooler and the tertiary-air pipe of dry method kiln.
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