CN118955153B - A high-strength refractory material for incinerator lining and preparation method thereof - Google Patents
A high-strength refractory material for incinerator lining and preparation method thereof Download PDFInfo
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- CN118955153B CN118955153B CN202311159237.XA CN202311159237A CN118955153B CN 118955153 B CN118955153 B CN 118955153B CN 202311159237 A CN202311159237 A CN 202311159237A CN 118955153 B CN118955153 B CN 118955153B
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- phosphate
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- 239000011819 refractory material Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000000843 powder Substances 0.000 claims abstract description 102
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 71
- 239000010452 phosphate Substances 0.000 claims abstract description 71
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 55
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 36
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002131 composite material Substances 0.000 claims abstract description 32
- 239000000178 monomer Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 19
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004743 Polypropylene Substances 0.000 claims abstract description 18
- -1 polypropylene Polymers 0.000 claims abstract description 18
- 229920001155 polypropylene Polymers 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 239000010426 asphalt Substances 0.000 claims abstract description 16
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003469 silicate cement Substances 0.000 claims abstract description 9
- RUDFQVOCFDJEEF-UHFFFAOYSA-N oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 56
- 238000003756 stirring Methods 0.000 claims description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 28
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 24
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 22
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 17
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 16
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 16
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 15
- DKIDEFUBRARXTE-UHFFFAOYSA-N 3-mercaptopropanoic acid Chemical compound OC(=O)CCS DKIDEFUBRARXTE-UHFFFAOYSA-N 0.000 claims description 14
- 239000002211 L-ascorbic acid Substances 0.000 claims description 14
- 235000000069 L-ascorbic acid Nutrition 0.000 claims description 14
- 229960005070 ascorbic acid Drugs 0.000 claims description 14
- 239000002243 precursor Substances 0.000 claims description 14
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 12
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 12
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 12
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 12
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 claims description 11
- CMOAHYOGLLEOGO-UHFFFAOYSA-N oxozirconium;dihydrochloride Chemical compound Cl.Cl.[Zr]=O CMOAHYOGLLEOGO-UHFFFAOYSA-N 0.000 claims description 11
- 239000011780 sodium chloride Substances 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 9
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 3
- PHTQWCKDNZKARW-UHFFFAOYSA-N isoamylol Chemical compound CC(C)CCO PHTQWCKDNZKARW-UHFFFAOYSA-N 0.000 claims 2
- 238000005119 centrifugation Methods 0.000 claims 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 26
- 229910052746 lanthanum Inorganic materials 0.000 abstract description 19
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 abstract description 19
- 239000002245 particle Substances 0.000 abstract description 17
- 239000000377 silicon dioxide Substances 0.000 abstract description 14
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 13
- 239000002253 acid Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 238000000975 co-precipitation Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 123
- 238000002156 mixing Methods 0.000 description 44
- CPJRRXSHAYUTGL-UHFFFAOYSA-N isopentenyl alcohol Chemical compound CC(=C)CCO CPJRRXSHAYUTGL-UHFFFAOYSA-N 0.000 description 26
- 238000001914 filtration Methods 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 18
- 238000001816 cooling Methods 0.000 description 14
- 229910010271 silicon carbide Inorganic materials 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 12
- 230000001105 regulatory effect Effects 0.000 description 11
- 238000004090 dissolution Methods 0.000 description 10
- 238000001354 calcination Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 239000011398 Portland cement Substances 0.000 description 8
- 238000000227 grinding Methods 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005245 sintering Methods 0.000 description 6
- 239000011449 brick Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005496 eutectics Effects 0.000 description 4
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 4
- 229920005646 polycarboxylate Polymers 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000001291 vacuum drying Methods 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000668 effect on calcium Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000003746 solid phase reaction Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007676 flexural strength test Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 235000011157 hong shi Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- QVDTXNVYSHVCGW-ONEGZZNKSA-N isopentenol Chemical compound CC(C)\C=C\O QVDTXNVYSHVCGW-ONEGZZNKSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002906 medical waste Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
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- C07F9/08—Esters of oxyacids of phosphorus
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- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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Abstract
本发明涉及耐火材料领域，具体为一种焚烧炉内衬用高强度耐火材料及其制备方法。本发明将L‑2‑氨基‑3‑羟基丁酸‑3‑磷酸酯与2‑丙烯酰胺‑2‑甲基丙磺酸反应生成了磷酸酯单体，并将其作为第三单体对聚羧酸减水剂改性，得到磷酸酯型减水剂；使用共沉淀法制备锆酸镧粉体，并在其外层负载碳酸钙得到复合粉体以提高耐热性能；将复合粉体与高铝骨料、碳化硅微粉、α‑氧化铝粉体、二氧化硅颗粒、硅酸盐水泥、球状沥青、磷酸酯型减水剂、聚丙烯纤维、三氧化二钇粉体混合，得到具有高强度、耐高温的耐火材料，可用于制备焚烧炉内衬。The present invention relates to the field of refractory materials, specifically to a high-strength refractory material for an incinerator lining and a preparation method thereof. The present invention reacts L-2-amino-3-hydroxybutyric acid-3-phosphate with 2-acrylamide-2-methylpropanesulfonic acid to generate a phosphate monomer, and uses it as a third monomer to modify a polycarboxylic acid water reducer to obtain a phosphate-type water reducer; a lanthanum zirconate powder is prepared by a coprecipitation method, and calcium carbonate is loaded on its outer layer to obtain a composite powder to improve heat resistance; the composite powder is mixed with high-aluminum aggregate, silicon carbide powder, α-alumina powder, silicon dioxide particles, silicate cement, spherical asphalt, phosphate-type water reducer, polypropylene fiber, and yttrium trioxide powder to obtain a high-strength, high-temperature resistant refractory material that can be used to prepare an incinerator lining.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a high-strength refractory material for an incinerator lining and a preparation method thereof.
Background
The incinerator is environment-friendly equipment widely applied to treatment of industrial waste, household garbage and medical waste, and comprises a pretreatment system, an incineration system, a smoke biochemical dust removal system and an auxiliary ignition system, wherein the garbage is combusted at high temperature in an incineration hearth to form waste gas, the waste gas enters a secondary combustion chamber, and is discharged into the atmosphere after being completely combusted and dust removed, so that harmless treatment can be realized, the volume of the waste can be effectively reduced, the content of toxic substances can be reduced, and the energy can be recovered. To achieve this, the incinerator interior is required to have high strength, wear resistance, high temperature resistance, and chemical resistance. Therefore, refractory materials for incinerator liners are of great importance.
The traditional lining materials of the incinerator are mainly refractory bricks, including magnesia bricks, high-alumina bricks, siliceous bricks and the like. These blocks have good fire resistance and mechanical strength, but relatively poor wear resistance under high temperature and corrosive environments. The refractory castable is an amorphous refractory material and mainly comprises refractory aggregate, a binder and an additive. Compared with refractory bricks, the refractory castable has better workability, higher corrosion resistance and lower temperature drop rate. However, the strength and high temperature stability of the refractory castable remain to be improved.
Disclosure of Invention
The invention aims to provide a high-strength refractory material for an incinerator lining and a preparation method thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme that the high-strength refractory material for the incinerator lining and the preparation method thereof comprise the following steps:
step 1, dispersing 2-acrylamide-2-methylpropanesulfonic acid and L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, filtering after the reaction is completed, and vacuum drying to obtain a phosphate monomer;
step 2, mixing acrylic acid with pure water to obtain a solution A, mixing 3-mercaptopropionic acid, L-ascorbic acid and pure water to obtain a solution B, adding isopentenyl alcohol polyoxyethylene ether and a phosphate monomer into the pure water, heating to dissolve, adding hydrogen peroxide to stir, simultaneously dropwise adding the solution A and the solution B to obtain a reaction solution, carrying out heat preservation reaction, cooling, and regulating the pH value to 6-7 to obtain a phosphate type water reducer;
Step 3, mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, using sodium hydroxide to maintain the pH of a system to 9-10 for reaction, centrifugally separating and drying to obtain core powder, dispersing the core powder in the pure water, adding sodium dodecyl benzene sulfonate, stirring, dropwise adding a calcium chloride solution, adding a sodium carbonate solution after the dropwise adding is completed to obtain a suspension, and reacting, filtering, drying, calcining and crushing to obtain composite powder;
And 4, mixing high-alumina aggregate, silicon carbide micropowder, alpha-alumina powder, silicon dioxide particles, portland cement, spherical asphalt, phosphate water reducer, polypropylene fiber, composite powder and yttrium oxide powder to obtain the high-strength refractory material.
In step 1, the molar ratio of 2-acrylamide-2-methylpropanesulfonic acid to L-2-amino-3-hydroxybutyric acid-3-phosphate is (1.1-1.4): 1.
In the step 1, the reaction is carried out in a nitrogen environment, the reaction temperature is 5-15 ℃, and the reaction time is 1-2 h.
In the step 2, the content of each component in the solution A is 5-5.5 parts by weight of acrylic acid and 2-2.5 parts by weight of pure water, and the content of each component in the solution B is 1.8-2 parts by weight of 3-mercaptopropionic acid, 1.2-1.5 parts by weight of L-ascorbic acid and 50-60 parts by weight of pure water.
In the step 2, the content of each component in the reaction solution is 63-68 parts by weight of isopentenyl alcohol polyoxyethylene ether, 3.7-4.5 parts by weight of phosphate monomer, 20-25 parts by weight of pure water, 0.36-0.4 part by weight of hydrogen peroxide, 5.8-6.2 parts by weight of solution A and 6-6.4 parts by weight of solution B.
In step 3, the molar ratio of La 3+ to Zr 4+ in the precursor solution is (1-1.2): 1.
In the step 3, the content of each component in the suspension is 5-10 parts by weight of core powder, 1-2 parts by weight of sodium dodecyl benzene sulfonate, 30-50 parts by weight of pure water, 13-17 parts by weight of calcium chloride solution and 15-22 parts by weight of sodium carbonate solution.
In the step 4, the high-strength refractory comprises, by weight, 62-67 parts of high-alumina aggregate, 13-22 parts of silicon carbide micropowder, 4-8 parts of alpha-alumina powder, 3-5 parts of silica particles, 2-3 parts of Portland cement, 2-3 parts of spherical asphalt, 1-2 parts of phosphate type water reducer, 0.01-0.2 part of polypropylene fiber, 3-7 parts of composite powder and 0.5-1.5 part of yttrium oxide powder.
Compared with the prior art, the refractory material prepared by the invention has the beneficial effects of high strength and high thermal stability, and can be used for preparing the lining of the incinerator.
The method comprises the steps of preparing a phosphoric acid type water reducer through a phosphate monomer, wherein L-2-amino-3-hydroxybutyric acid-3-phosphate and 2-acrylamide-2-methylpropanesulfonic acid are used as raw materials in the phosphate monomer, and in the preparation process, the reactant 2-acrylamide-2-methylpropanesulfonic acid is easy to undergo self-polymerization after being dissolved in water, so that the reaction is carried out in a sodium salt solution and a nitrogen environment, the reaction temperature is controlled to be 5-15 ℃, excessive 2-acrylamide-2-methylpropanesulfonic acid is added to enable the reactant L-2-amino-3-hydroxybutyric acid-3-phosphate to fully react, and unreacted 2-acrylamide-2-methylpropanesulfonic acid is excellent in water solubility, so that the separation between the reactant and the product phosphate monomer can be realized by adopting a filtering operation. The phosphate monomer, the isopentenyl alcohol polyoxyethylene ether and the acrylic acid react to obtain the phosphate water reducer, the phosphate water reducer has better performance than the conventional polycarboxylate water reducer, phosphate groups are generated by hydrolysis in the application process, the adsorption effect on calcium ions in cement is stronger, a stable structure can be formed on the surface of the cement, and the strength after hardening is improved.
After the polypropylene fiber is added, the polypropylene begins to soften, shrink and melt along with the rise of temperature, and finally air holes are formed and carbonized, tiny network air holes are formed in the refractory material, a water-gas channel is opened, internal stress is relieved, bursting is prevented, and the service life of the refractory material is prolonged.
Lanthanum zirconate has high temperature stability, and can improve high temperature resistance after being added, but lanthanum zirconate has poor toughness, and the direct addition can cause adverse effects such as strength reduction, durability deterioration and the like of a refractory material. The invention adds the composite powder with lanthanum zirconate as the inner core powder and calcium carbonate as the shell layer, and simultaneously adds yttrium oxide with good sintering assisting effect as the sintering aid. The yttrium oxide can reduce the eutectic point of silicon dioxide, magnesium oxide, aluminum oxide and other substances to form a eutectic phase, the generation of a liquid phase enables the original sintering process mainly comprising solid phase reaction to be changed into a process of solid phase and liquid phase to participate together, movement among particles is accelerated, mass transfer is promoted, in the baking process, when the temperature reaches above 900 ℃, calcium carbonate of a composite powder shell layer is heated and decomposed into calcium oxide and carbon dioxide, air holes are formed around lanthanum zirconate by discharging the carbon dioxide, the eutectic phase penetrates into air hole spaces in a liquid form, a crystalline phase coating layer is formed around lanthanum zirconate, the air holes are filled, the apparent ratio is reduced, and the compactness of the material is improved. The lanthanum zirconate has the grain boundary strengthening effect, can be further combined with a generated crystal phase coating layer, has higher strength and thermal stability, can effectively protect the lanthanum zirconate from being damaged under the action of external force, and makes up a short plate of the lanthanum zirconate. In addition, the calcium carbonate of the composite powder shell layer contains functional groups such as hydroxyl, carboxyl and the like, can generate chemical bonds or ionic bonds with phosphate groups of the phosphate type water reducer, and forms a layer of film on the surface of the composite powder, so that the surface property of the composite powder is changed, and the composite powder is favorably and uniformly dispersed in the refractory material.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The main materials and sources of the preparation method are that isopentenol polyoxyethylene ether TPEG-2400 is from Kowader chemical industry, high-alumina aggregate is from a san-Yuan refractory heat-insulating material, the grain size is 3-5 mm, silicon carbide micro powder is from a cis-Heng cis-wear-resistant material, the product number SHS-HTHG-04, alpha-alumina powder is from a Tuo-Rui fine grinding material, the model number is TR-2, the alpha-alumina content is more than or equal to 95%, silica particles are from Zhongkeno, the grain size is 1-3 mm, portland cement is P.O52.5R portland cement from Hongshi special cement company, spherical asphalt is from a golden high-temperature material, the grain size is 0.2-1 mm, polypropylene fiber is from a Kai-Sheng novel building material, the product number 1012, and yttrium trioxide powder is from a golden Rai nanometer material, and the product number JL-Y2O3.
Example 1
Step 1, dispersing 1.1mol of 2-acrylamide-2-methylpropanesulfonic acid and 1mol of L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, reacting for 1h in a nitrogen environment at 5 ℃, filtering, and drying in vacuum to obtain a phosphate monomer;
Step 2, mixing 5g of acrylic acid with 2g of pure water according to a weight ratio to obtain a solution A, mixing 1.8g of 3-mercaptopropionic acid, 1.2g L-ascorbic acid and 50g of pure water to obtain a solution B, adding 63g of isopentenyl alcohol polyoxyethylene ether and 3.7g of phosphate monomer into 20g of pure water, heating to 50 ℃, adding 0.38g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 5.8g of solution A and 6g of solution B, dropwise adding 3h of solution A and 3.5h of solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is completed, and regulating the pH value to 7 to obtain the phosphate type water reducer;
mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, wherein n (La 3 +)：n(Zr4+) =1:1, maintaining the pH of the system to 9 with sodium hydroxide, stirring, standing for 1h, centrifugally separating and drying to obtain core powder, dispersing 5g of core powder in 30g of pure water, adding 1g of sodium dodecyl benzene sulfonate, stirring for 30min, dropwise adding 13g of calcium chloride solution, adding 15g of sodium carbonate solution after the dropwise adding is completed, stirring and reacting for 1h, filtering, drying, calcining and grinding to obtain composite powder;
And 4, mixing 62kg of high-alumina aggregate, 13kg of silicon carbide micro powder, 4kg of alpha-alumina powder, 3kg of silicon dioxide particles, 2kg of silicate cement, 2kg of spherical asphalt, 1kg of phosphate type water reducer, 0.1kg of polypropylene fiber, 3kg of composite powder and 0.5kg of yttrium oxide powder to obtain the high-strength refractory material.
Example 2
Step 1, dispersing 1.1mol of 2-acrylamide-2-methylpropanesulfonic acid and 1mol of L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, reacting for 1.5 hours in a nitrogen environment at 15 ℃, filtering, and drying in vacuum to obtain a phosphate monomer;
step 2, mixing 5.1g of acrylic acid with 2g of pure water according to a weight ratio to obtain a solution A, mixing 1.9g of 3-mercaptopropionic acid, 1.25g of L-ascorbic acid and 50g of pure water to obtain a solution B, adding 62g of isopentenyl alcohol polyoxyethylene ether and 3.75g of phosphate monomer into 20g of pure water, heating to 50 ℃, adding 0.36g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 5.8g of solution A and 6.3g of solution B, dropwise adding 3h of solution A and 3.5h of solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is finished, and regulating the pH value to 7 to obtain the phosphate type water reducer;
Mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, wherein n (La 3 +)：n(Zr4+) =1.05:1, maintaining the pH of the system to 10 by using sodium hydroxide, stirring, standing for 1h, centrifugally separating and drying to obtain core powder, dispersing 6.5g of core powder in 35g of pure water, adding 1.5g of sodium dodecyl benzene sulfonate, stirring for 30min, dropwise adding 17g of calcium chloride solution, adding 15g of sodium carbonate solution after dropwise adding to obtain a suspension, stirring and reacting for 2h, filtering, drying, calcining and grinding to obtain composite powder;
And 4, mixing 63kg of high-alumina aggregate, 15kg of silicon carbide micro powder, 5kg of alpha-alumina powder, 3.8kg of silicon dioxide particles, 2.4kg of Portland cement, 2.1kg of spherical asphalt, 2kg of phosphate water reducer, 0.13kg of polypropylene fiber, 3.8kg of composite powder and 0.6kg of yttrium oxide powder to obtain the high-strength refractory material.
Example 3
Step 1, dispersing 1.19mol of 2-acrylamide-2-methylpropanesulfonic acid and 1mol of L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, reacting for 1.5h in a nitrogen environment at 10 ℃, filtering, and vacuum drying to obtain a phosphate monomer;
Step 2, mixing 5.2g of acrylic acid with 2.3g of pure water according to a weight ratio to obtain a solution A, mixing 1.86g of 3-mercaptopropionic acid, 1.34g L-ascorbic acid and 58g of pure water to obtain a solution B, adding 65g of isopentenyl alcohol polyoxyethylene ether and 3.9g of phosphate monomer into 22g of pure water, heating to 55 ℃, adding 0.37g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 5.94g of solution A and 6.15g of solution B, dropwise adding 3h of solution A and 3.5h of solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is finished, and regulating the pH value to 7 to obtain the phosphate type water reducer;
Mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, wherein n (La 3 +)：n(Zr4+) =1.05:1, maintaining the pH of the system to 10 by using sodium hydroxide, stirring, standing for 1h, centrifugally separating and drying to obtain core powder, dispersing 7.5g of core powder in 45g of pure water, adding 1.45g of sodium dodecyl benzene sulfonate, stirring for 30min, dropwise adding 14g of calcium chloride solution, adding 18g of sodium carbonate solution after dropwise adding to obtain a suspension, stirring and reacting for 1.5h, filtering, drying, calcining and grinding to obtain composite powder;
And 4, mixing 65kg of high-alumina aggregate, 17kg of silicon carbide micro powder, 6kg of alpha-alumina powder, 4.9kg of silicon dioxide particles, 2.5kg of Portland cement, 2.7kg of spherical asphalt, 1.5kg of phosphate water reducer, 0.1kg of polypropylene fiber, 4.8kg of composite powder and 0.7kg of yttrium oxide powder to obtain the high-strength refractory material.
Example 4
Step 1, dispersing 1.24mol of 2-acrylamide-2-methylpropanesulfonic acid and 1mol of L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, reacting for 2 hours in a nitrogen environment at 15 ℃, filtering and drying in vacuum to obtain a phosphate monomer;
Step 2, mixing 5.3g of acrylic acid with 2.28g of pure water according to a weight ratio to obtain a solution A, mixing 1.83g of 3-mercaptopropionic acid, 1.41g L-ascorbic acid and 50g of pure water to obtain a solution B, adding 67g of isopentenyl alcohol polyoxyethylene ether and 4g of phosphate monomer into 22g of pure water, heating to 50 ℃, adding 0.39g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 6.1g of solution A and 6.23g of solution B, dropwise adding 3h of solution A and 3.5h of solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is finished, and regulating the pH value to 7 to obtain the phosphate type water reducer;
Mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, wherein n (La 3 +)：n(Zr4+) =1.15:1, maintaining the pH of the system to 9.5 with sodium hydroxide, stirring, standing for 1h, centrifugally separating and drying to obtain core powder, dispersing 8.7g of core powder in 45g of pure water, adding 1.6g of sodium dodecyl benzene sulfonate, stirring for 30min, dropwise adding 15g of calcium chloride solution, adding 20.3g of sodium carbonate solution after dropwise adding to obtain a suspension, stirring for 2h, filtering, drying, calcining and crushing to obtain composite powder;
And 4, mixing 66kg of high-alumina aggregate, 18.6kg of silicon carbide micro powder, 7.5kg of alpha-alumina powder, 4.3kg of silicon dioxide particles, 2.8kg of silicate cement, 2.8kg of spherical asphalt, 1.76kg of phosphate water reducer, 0.2kg of polypropylene fiber, 5.8kg of composite powder and 0.8kg of yttrium oxide powder to obtain the high-strength refractory material.
Example 5
Step 1, dispersing 1.35mol of 2-acrylamide-2-methylpropanesulfonic acid and 1mol of L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, reacting for 2 hours in a nitrogen environment at 15 ℃, filtering and drying in vacuum to obtain a phosphate monomer;
Step 2, mixing 5.36g of acrylic acid with 2.3g of pure water according to a weight ratio to obtain a solution A, mixing 1.9g of 3-mercaptopropionic acid, 1.5g L-ascorbic acid and 60g of pure water to obtain a solution B, adding 67g of isopentenyl alcohol polyoxyethylene ether and 4.18g of phosphate monomer into 23g of pure water, heating to 55 ℃, adding 0.38g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 6.05g of solution A and 6.25g of solution B, dropwise adding 3h of solution A and 3.5h of solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is finished, and regulating the pH value to 7 to obtain the phosphate type water reducer;
Mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, wherein n (La 3 +)：n(Zr4+) =1:1, maintaining the pH of the system to 9.5 by using sodium hydroxide, stirring, standing for 1h, centrifugally separating and drying to obtain core powder, dispersing 8g of core powder in 45g of pure water, adding 1.8g of sodium dodecyl benzene sulfonate, stirring for 30min, dropwise adding 16.5g of calcium chloride solution, adding 21g of sodium carbonate solution after the dropwise adding is completed to obtain a suspension, stirring and reacting for 1.5h, filtering, drying, calcining and grinding to obtain composite powder;
And 4, mixing 66kg of high-alumina aggregate, 20kg of silicon carbide micro powder, 8kg of alpha-alumina powder, 4kg of silicon dioxide particles, 2.8kg of silicate cement, 2.8kg of spherical asphalt, 2kg of phosphate water reducer, 0.18kg of polypropylene fiber, 7kg of composite powder and 1.2kg of yttrium oxide powder to obtain the high-strength refractory material.
Example 6
Step 1, dispersing 1.4mol of 2-acrylamide-2-methylpropanesulfonic acid and 1mol of L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, reacting for 2 hours in a nitrogen environment at 15 ℃, filtering, and drying in vacuum to obtain a phosphate monomer;
Step 2, mixing 5.5g of acrylic acid with 2.5g of pure water according to a weight ratio to obtain a solution A, mixing 2g of 3-mercaptopropionic acid, 1.5g of L-ascorbic acid and 60g of pure water to obtain a solution B, adding 68g of isopentenyl alcohol polyoxyethylene ether and 4.5g of phosphate monomer into 25g of pure water, heating to 60 ℃, adding 0.4g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 6.2g of solution A and 6.4g of solution B, dropwise adding 3h of solution A and 3.5h of solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is finished, and regulating the pH value to 7 to obtain the phosphate type water reducer;
Mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, wherein n (La 3 +)：n(Zr4+) =1.2:1, maintaining the pH of the system to 10 by using sodium hydroxide, stirring, standing for 1h, centrifugally separating and drying to obtain core powder, dispersing 10g of core powder in 50g of pure water, adding 2g of sodium dodecyl benzene sulfonate, stirring for 30min, dropwise adding 17g of calcium chloride solution, adding 22g of sodium carbonate solution after the dropwise adding is completed, stirring and reacting for 2h, filtering, drying, calcining and grinding to obtain composite powder;
And 4, mixing 67kg of high-alumina aggregate, 22kg of silicon carbide micro powder, 8kg of alpha-alumina powder, 5kg of silicon dioxide particles, 3kg of silicate cement, 3kg of spherical asphalt, 2kg of phosphate type water reducer, 0.2kg of polypropylene fiber, 7kg of composite powder and 1.5kg of yttrium oxide powder to obtain the high-strength refractory material.
Comparative example 1
Conventional polycarboxylate water reducers are used.
Step 1, mixing 5g of acrylic acid with 2g of pure water according to a weight ratio to obtain a solution A, mixing 1.8g of 3-mercaptopropionic acid, 1.2g L-ascorbic acid and 50g of pure water to obtain a solution B, adding 63g of isopentenyl alcohol polyoxyethylene ether into 20g of pure water, heating to 50 ℃, adding 0.38g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 5.8g of the solution A and 6g of the solution B, dropwise adding 3h of the solution A and 3.5h of the solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is completed, and regulating the pH value to 7 to obtain the polycarboxylate water reducer;
Mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, wherein n (La 3 +)：n(Zr4+) =1:1, maintaining the pH of the system to 9 with sodium hydroxide, stirring, standing for 1h, centrifugally separating and drying to obtain core powder, dispersing 5g of core powder in 30g of pure water, adding 1g of sodium dodecyl benzene sulfonate, stirring for 30min, dropwise adding 13g of calcium chloride solution, adding 15g of sodium carbonate solution after the dropwise adding is completed, stirring and reacting for 1h, filtering, drying, calcining and grinding to obtain composite powder;
And 3, mixing 62kg of high-alumina aggregate, 13kg of silicon carbide micro powder, 4kg of alpha-alumina powder, 3kg of silicon dioxide particles, 2kg of silicate cement, 2kg of spherical asphalt, 1kg of polycarboxylate water reducer, 0.1kg of polypropylene fiber, 3kg of composite powder and 0.5kg of yttrium oxide powder to obtain the refractory material.
Comparative example 2
The calcium carbonate particles are used for replacing the composite powder to prepare the refractory material.
Step 1, dispersing 1.1mol of 2-acrylamide-2-methylpropanesulfonic acid and 1mol of L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, reacting for 1.5 hours in a nitrogen environment at 15 ℃, filtering, and drying in vacuum to obtain a phosphate monomer;
step 2, mixing 5.1g of acrylic acid with 2g of pure water according to a weight ratio to obtain a solution A, mixing 1.9g of 3-mercaptopropionic acid, 1.25g of L-ascorbic acid and 50g of pure water to obtain a solution B, adding 62g of isopentenyl alcohol polyoxyethylene ether and 3.75g of phosphate monomer into 20g of pure water, heating to 50 ℃, adding 0.36g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 5.8g of solution A and 6.3g of solution B, dropwise adding 3h of solution A and 3.5h of solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is finished, and regulating the pH value to 7 to obtain the phosphate type water reducer;
and 3, mixing 63kg of high-alumina aggregate, 15kg of silicon carbide micro powder, 5kg of alpha-alumina powder, 3.8kg of silicon dioxide particles, 2.4kg of Portland cement, 2.1kg of spherical asphalt, 2kg of phosphate water reducer, 0.13kg of polypropylene fiber, 3.8kg of calcium carbonate particles and 0.6kg of yttrium oxide powder to obtain the refractory material.
Comparative example 3
The calcium carbonate particles and the core powder are directly blended to prepare the refractory material.
Step 1, dispersing 1.19mol of 2-acrylamide-2-methylpropanesulfonic acid and 1mol of L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, reacting for 1.5h in a nitrogen environment at 10 ℃, filtering, and vacuum drying to obtain a phosphate monomer;
Step 2, mixing 5.2g of acrylic acid with 2.3g of pure water according to a weight ratio to obtain a solution A, mixing 1.86g of 3-mercaptopropionic acid, 1.34g L-ascorbic acid and 58g of pure water to obtain a solution B, adding 65g of isopentenyl alcohol polyoxyethylene ether and 3.9g of phosphate monomer into 22g of pure water, heating to 55 ℃, adding 0.37g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 5.94g of solution A and 6.15g of solution B, dropwise adding 3h of solution A and 3.5h of solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is finished, and regulating the pH value to 7 to obtain the phosphate type water reducer;
Step 3, mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, wherein n (La 3 +)：n(Zr4+) =1.05:1 in the precursor solution, maintaining the pH value of the system to 10 by using sodium hydroxide, stirring, standing for 1h, centrifuging, separating and drying to obtain core powder;
And 4, mixing 65kg of high-alumina aggregate, 17kg of silicon carbide micro powder, 6kg of alpha-alumina powder, 4.9kg of silicon dioxide particles, 2.5kg of Portland cement, 2.7kg of spherical asphalt, 1.5kg of phosphate water reducer, 2.4kg of calcium carbonate particles, 0.1kg of polypropylene fiber, 2.4kg of kernel powder and 0.7kg of yttrium oxide powder to obtain the refractory material.
Comparative example 4
And preparing the refractory material without adding yttrium oxide.
Step 1, dispersing 1.24mol of 2-acrylamide-2-methylpropanesulfonic acid and 1mol of L-2-amino-3-hydroxybutyric acid-3-phosphate in a sodium chloride solution, reacting for 2 hours in a nitrogen environment at 15 ℃, filtering and drying in vacuum to obtain a phosphate monomer;
Step 2, mixing 5.3g of acrylic acid with 2.28g of pure water according to a weight ratio to obtain a solution A, mixing 1.83g of 3-mercaptopropionic acid, 1.41g L-ascorbic acid and 50g of pure water to obtain a solution B, adding 67g of isopentenyl alcohol polyoxyethylene ether and 4g of phosphate monomer into 22g of pure water, heating to 50 ℃, adding 0.39g of hydrogen peroxide after dissolution, stirring for 15min, simultaneously dropwise adding 6.1g of solution A and 6.23g of solution B, dropwise adding 3h of solution A and 3.5h of solution B to obtain a reaction solution, carrying out heat preservation reaction on the reaction solution for 1.5h, cooling after the reaction is finished, and regulating the pH value to 7 to obtain the phosphate type water reducer;
Mixing lanthanum nitrate, zirconium oxychloride and pure water to obtain a precursor solution, wherein n (La 3 +)：n(Zr4+) =1.15:1, maintaining the pH of the system to 9.5 with sodium hydroxide, stirring, standing for 1h, centrifugally separating and drying to obtain core powder, dispersing 8.7g of core powder in 45g of pure water, adding 1.6g of sodium dodecyl benzene sulfonate, stirring for 30min, dropwise adding 15g of calcium chloride solution, adding 20.3g of sodium carbonate solution after dropwise adding to obtain a suspension, stirring for 2h, filtering, drying, calcining and crushing to obtain composite powder;
And 4, mixing 66kg of high-alumina aggregate, 18.6kg of silicon carbide micro powder, 7.5kg of alpha-alumina powder, 4.3kg of silicon dioxide particles, 2.8kg of silicate cement, 2.8kg of spherical asphalt, 1.76kg of phosphate type water reducer, 0.2kg of polypropylene fiber and 5.8kg of composite powder to obtain the high-strength refractory material.
Experiment:
the refractory materials prepared in examples 1 to 6 and comparative examples 1 to 4 were hardened at 35 ℃ for 3 hours and heat treated at 1400 ℃ for 3 hours to obtain finished products. The performance test was carried out by taking 25cm×10cm×5cm finished products, and the experimental results are shown in the following table. Wherein:
The strength test comprises normal temperature flexural strength and normal temperature compressive strength, wherein the normal temperature flexural strength test method adopts three-point bending equipment for testing;
and (3) stability test, namely heating the finished product to 1200 ℃, immediately cooling to 30 ℃ by using cold water after thermal shock for 10min, and performing cyclic operation for 100h to test the strength retention rate.
| Project | Normal temperature flexural strength/MPa | Normal temperature compressive strength/MPa | Strength retention rate |
| Example 1 | 13.83 | 108 | 71% |
| Example 2 | 13.12 | 110 | 70% |
| Example 3 | 15.21 | 113 | 71% |
| Example 4 | 14.39 | 111 | 74% |
| Example 5 | 13.91 | 111 | 73% |
| Example 6 | 12.42 | 109 | 70% |
| Comparative example 1 | 11.72 | 105 | / |
| Comparative example 2 | 10.13 | 96 | 58% |
| Comparative example 3 | 10.62 | 104 | 55% |
| Comparative example 4 | 10.59 | 99 | 57% |
Conclusion:
From the data of examples 1-6 in the table, the refractory material prepared by the invention has good high temperature resistance, the strength retention rate can reach more than 70% after heat shock water cooling for 100 hours, and the refractory material is suitable for preparing incinerator liners. Comparing example 1 with comparative example 1, in example 1, phosphate is used as monomer, phosphate group is introduced into the water reducing agent structure, phosphate group is generated after hydrolysis, the adsorption effect on calcium ions in cement is stronger, stable structure can be formed on the surface of cement, meanwhile, the interfacial compatibility of each component can be improved, so that materials are more uniform after mixing than in comparative example 1, and the prepared refractory material has higher strength. Comparing the example 2 with the comparative example 2, the composite powder in the example 2 has the advantages of lanthanum zirconate as the core powder, calcium carbonate as the shell layer, high thermal stability, strong sintering resistance, low thermal expansion coefficient and the like, and improves the high temperature resistance and durability of the refractory material, while the comparative example 2 has the advantage that the lanthanum zirconate is not added, so that the high temperature resistance is inferior to that of the example 2, and the mechanical strength of the material is obviously reduced after the thermal shock water cooling circulation treatment. In comparison with comparative example 3, when the baking temperature is raised, the calcium carbonate in example 3 is heated to decompose and discharge carbon dioxide and calcium oxide, the carbon dioxide can generate pore spaces around lanthanum zirconate, the existence of yttrium oxide enables the silicon dioxide, magnesium oxide, iron oxide, calcium oxide and other components in the refractory material to form a liquid phase with a low eutectic point in the sintering process, the liquid phase diffuses into the pore spaces to form a package around lanthanum zirconate, lanthanum zirconate has a grain boundary strengthening effect, the liquid phase directly forms a crystalline phase and then is combined with lanthanum zirconate, so that the apparent porosity of the refractory material is effectively reduced, the compactness is improved, meanwhile, the problem of poor toughness of lanthanum zirconate is also improved, and the folding resistance and the compressive strength of the refractory material are improved, in comparative example 3, the calcium carbonate and lanthanum zirconate are directly blended, the generation positions of pores after the thermal decomposition of the calcium carbonate are more random, the liquid phase cannot be concentrated around lanthanum zirconate to form a package structure after the diffusion, the reinforcing effect on lanthanum zirconate is effective, and finally the refractory material in comparative example 3 has the performance which is inferior to that of example 3. In comparison between example 4 and comparative example 4, the comparative example 4 was free of yttrium oxide, and the sintering process was mainly based on solid phase reaction, and the solid phase fluidity was poor, and pores generated after decomposition of calcium carbonate could not be filled, and the apparent porosity was large, and it was difficult to form a high-strength coating layer on the surface thereof, so that the performance of the refractory material was poor.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited thereto, but may be modified or substituted for some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
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