CN111646784A - Al (aluminum)2O3-SiC-C refractory castable and preparation method thereof - Google Patents
Al (aluminum)2O3-SiC-C refractory castable and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 8
- 229910052782 aluminium Inorganic materials 0.000 title claims description 7
- 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 40
- 239000002245 particle Substances 0.000 claims abstract description 36
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 33
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000004576 sand Substances 0.000 claims abstract description 18
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 18
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000010426 asphalt Substances 0.000 claims abstract description 11
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 239000007767 bonding agent Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 229910001570 bauxite Inorganic materials 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 24
- 239000000463 material Substances 0.000 abstract description 24
- 230000035939 shock Effects 0.000 abstract description 13
- 229910052742 iron Inorganic materials 0.000 abstract description 12
- 238000002156 mixing Methods 0.000 abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 23
- 230000014759 maintenance of location Effects 0.000 description 8
- 239000010431 corundum Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000005350 fused silica glass Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000009970 fire resistant effect Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound 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
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 229910052580 B4C Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010443 kyanite Substances 0.000 description 1
- 229910052850 kyanite Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel 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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/1015—Refractories from grain sized mixtures containing refractory metal compounds other than those covered by C04B35/103 - C04B35/106
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- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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Abstract
The invention discloses Al2O3an-SiC-C refractory castable and a preparation method thereof, belonging to the technical field of refractory castable. Al disclosed in the invention2O3the-SiC-C refractory castable is prepared by taking 22-32 parts by mass of silicon carbide particles, 55-65 parts by mass of alumina aggregate, 2-8 parts by mass of α -alumina micro powder and 2-4 parts by mass of a bonding agent as raw materials, taking 0.6-1.2 parts by mass of silicon micro powder, 0.5-2.5 parts by mass of spherical asphalt, 1.5-5.5 parts by mass of zircon sand, 0.5-1.5 parts by mass of metallic silicon powder and 0.06-0.16 part by mass of a water reducing agent as additives, and uniformly mixing in a dry mode to obtain the Al-C refractory castable, wherein the Al-C refractory castable is prepared by uniformly mixing Al with the silicon carbide2O3-SiC-C refractory castable. The invention has simple process and low cost, and the prepared Al2O3the-SiC-C iron runner material has the advantages of high strength, corrosion resistance, good thermal shock stability and the like.
Description
Technical Field
The invention belongs to the technical field of refractory castable. In particular to Al2O3-SiC-C refractory castable and a preparation method thereof.
Background
The material of the iron runner material for nearly ten yearsA great change occurs. In the 50 s, blast furnaces were generally made of inexpensive materials such as coke, clay clinker, tar, etc. The material has low strength, and because the iron runner material contains a large amount of coke powder and does not contain an antioxidant, the material has poor oxidation resistance and serious environmental pollution. In the 60 s, in order to improve the iron-passing capability of the iron tapping runner, iron runner materials using alumina, brown corundum, silicon carbide, coke and the like as main raw materials were developed. In the 80 s, with the continuous improvement of the technology, silicon carbide is introduced into iron runner materials to improve the product performance, and the iron passing level is improved from 3-4 ten thousand tons to 5-6 ten thousand tons. At the same time, surround Al2O3the-SiC-C system develops a plurality of new materials aiming at different construction environments and technical requirements, and the currently used iron runner material not only selects environment-friendly materials, but also improves the fluidity of the iron runner material and improves the construction performance and the service performance of the iron runner material through reasonable grain size distribution and ultrafine powder technology. However, with the rapid development of the steel industry, the iron output of the blast furnace is increasing and the working condition temperature changes dramatically. For this reason, further optimization of the erosion resistance, mechanical strength and thermal shock resistance of the castable refractory for tapping runners is required.
Light Al2O3The patent technology of the-SiC-C refractory castable and the preparation method thereof (CN102964138A) discloses a method for preparing light Al by using 40-55 wt% of porous corundum particles, 8-12 wt% of corundum particles, 6-12 wt% of SiC particles, 6-10 wt% of SiC fine powder, 5-8 wt% of corundum fine powder, 8-12 wt% of active alumina micro powder, 3-5 wt% of calcium aluminate cement, 2-4 wt% of silicon oxide micro powder, 2-4 wt% of spherical asphalt, 1.5-2.0 wt% of silicon powder, 0.1-0.3 wt% of aluminum powder and 0.1-0.3 wt% of boron carbide powder as raw materials, and adding 8-15 wt% of water, 0.2-0.6 wt% of water reducing agent and 0.02-0.04 wt% of organic explosion-proof fiber into the raw materials2O3-SiC-C refractory castable. The method reduces Al to a certain extent2O3Bulk density and thermal conductivity of the product of the-SiC-C castable. But its main drawbacks are: (1) the raw materials are various and the cost is high; (2) the organic explosion-proof fiber is difficult to be uniformly dispersed and seriously influences Al2O3-properties of SiC-C refractory castable; (3) use of porous corundum is disadvantageous for Al2O3the-SiC-C refractory castable is resistant to corrosion of molten iron and molten slag.
' preparation of Al by using coal gangue2O3The patent technology of the method for preparing the-SiC-C series stemming fire-resistant material (CN108218393A) discloses that coal gangue and carbonaceous material are subjected to carbon-buried high-temperature carbothermic reduction reaction to generate Al2O3-SiC complex phase material, brown corundum, SiC powder, clay, kyanite powder, coke powder, asphalt powder and Fe-Si3N4Mixing powder and tar to obtain Al2O3-SiC-C stemming fire-resistant material. The method realizes the recycling of the coal gangue to a certain extent, saves resources and reduces environmental pollution. But its main drawbacks are: (1) al caused by high impurity content in coal gangue2O3The high-temperature strength of the-SiC-C stemming fire-resistant material is obviously reduced; (2) the production process is complex and the cost is high.
Disclosure of Invention
In view of the above problems in the prior art, the present invention is to provide an Al alloy2O3the-SiC-C refractory castable has the advantages of high strength, corrosion resistance, good thermal shock stability and the like. Another object of the present invention is to provide the Al2O3A preparation method of-SiC-C refractory castable.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
al (aluminum)2O3The preparation method of the-SiC-C refractory castable comprises the steps of taking 22-32 parts by mass of silicon carbide particles, 55-65 parts by mass of alumina aggregate, 2-8 parts by mass of α -alumina micro powder and 2-4 parts by mass of a bonding agent as raw materials, taking 0.6-1.2 parts by mass of silica micro powder, 0.5-2.5 parts by mass of spherical asphalt, 1.5-5.5 parts by mass of zircon sand, 0.5-1.5 parts by mass of silicon metal powder and 0.06-0.16 part by mass of a water reducing agent as additives, and uniformly mixing in a dry mode to obtain the Al-SiC-C refractory castable, wherein the Al-SiC-C refractory castable is prepared by the steps of2O3-SiC-C refractory castable.
Further onThe bauxite aggregate comprises the following main chemical components: al (Al)2O3More than or equal to 86 wt%; the bauxite aggregate composition is as follows: the alumina aggregate with the particle size of 5-8 mm accounts for 32-38%, the alumina aggregate with the particle size of 3-5 mm accounts for 25-31%, and the alumina aggregate with the particle size of 1-3 mm accounts for 33-37%.
Further, the main chemical components of the silicon carbide are as follows: SiC is more than or equal to 97 wt%; the silicon carbide particle composition is as follows: the silicon carbide particles have the particle size of 0.075-1 mm accounting for 40-60% of the silicon carbide, the particle size of 0.044-0.075 mm accounting for 20-36% of the silicon carbide, and the particle size of 0-0.044 mm accounting for 20-28% of the silicon carbide.
Furthermore, the grain size of the alpha-alumina micro powder is less than or equal to 0.008 mm.
Furthermore, the grain size of the silicon micro powder is less than or equal to 0.045 mm.
Furthermore, the particle size of the spherical asphalt is less than or equal to 0.1 mm.
Further, the zircon sand comprises the following main chemical components: SiO 2227 to 40 wt% of ZrO260 to 70 wt% of Al2O30.1 to 0.5 wt.% of Fe2O30.05 to 0.5 wt% of CaO and 1.0 to 0.05 wt% of MgO; the loss of zircon sand after burning is 3-5 wt%; the diameter of the zircon sand is less than 0.074 mm.
Furthermore, the particle size of the metal silicon powder is less than or equal to 0.05 mm.
The Al is2O3Al prepared by preparation method of-SiC-C refractory castable2O3-SiC-C refractory castable.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts zircon sand as an additive to add Al2O3the-SiC-C refractory castable plays a significant role in promoting the erosion resistance and strength of materials. Zirconium dioxide and a fused quartz phase are generated by decomposing the zircon sand at a high temperature, wherein the zirconium dioxide can generate volume expansion through the phase change effect to inhibit the expansion of cracks in the matrix, so that the toughness and the thermal shock stability of the material are improved; the fused quartz generated by decomposition can react with alumina in the matrix at high temperature to generate mullite, so that the mechanical strength and the erosion resistance of the material are improvedCorrosion performance;
(2) al prepared by the invention2O3The normal-temperature breaking strength of the-SiC-C refractory castable product after heat treatment at 1450 ℃ for × 3 hours is 12-15 MPa, the strength retention rate is 65-72% after heat shock and water cooling at 1100 ℃ for 5 times, and the Al content is remarkably improved2O3The strength and the thermal shock resistance of the-SiC-C refractory castable.
Detailed Description
The invention is further described with reference to specific examples.
In order to avoid repetition, the technical parameters to be related in this specific embodiment are described in a unified manner as follows, which will not be described in the embodiments:
the bauxite aggregate comprises the following main chemical components: al (Al)2O3More than or equal to 86 wt%; the bauxite aggregate composition is as follows: the alumina aggregate with the particle size of 5-8 mm accounts for 32-38%, the alumina aggregate with the particle size of 3-5 mm accounts for 25-31%, and the alumina aggregate with the particle size of 1-3 mm accounts for 33-37%.
The main chemical components of the silicon carbide are as follows: SiC is more than or equal to 97 wt%; the silicon carbide particle composition is as follows: the silicon carbide particles have the particle size of 0.075-1 mm accounting for 40-60% of the silicon carbide, the particle size of 0.044-0.075 mm accounting for 20-36% of the silicon carbide, and the particle size of 0-0.044 mm accounting for 20-28% of the silicon carbide.
The grain size of the alpha-alumina micro powder is less than or equal to 0.008 mm.
The grain size of the silicon micro powder is less than or equal to 0.045 mm.
The grain size of the spherical asphalt is less than or equal to 0.1 mm.
The zircon sand comprises the following main chemical components: SiO 2227 to 40 wt% of ZrO260 to 70 wt% of Al2O30.1 to 0.5 wt.% of Fe2O30.05 to 0.5 wt% of CaO and 1.0 to 0.05 wt% of MgO; the ignition loss is 3-5 wt%; the grain diameter is less than 0.074 mm.
The grain diameter of the metal silicon powder is less than or equal to 0.05 mm.
Example 1:
al (aluminum)2O3The preparation method of the-SiC-C refractory castable comprises the following steps of 29-32 parts by mass of silicon carbide particles, 55-58 parts by mass of alumina aggregate, 2-4 parts by mass of α -alumina micropowder and 2-3 parts by mass of a binderThe raw materials are dry-mixed uniformly by taking 0.6-1.2 parts by mass of silicon micropowder, 0.5-2.5 parts by mass of spherical asphalt, 1.5-3 parts by mass of zircon sand, 0.5-1.5 parts by mass of metal silicon powder and 0.06-0.16 part by mass of water reducing agent as additives to obtain Al2O3-SiC-C refractory castable.
Al prepared in this example2O3The strength retention rate of the-SiC-C refractory castable product at room temperature after heat treatment at 1450 ℃ for × 3 hours is 12-13 MPa, and the strength retention rate at 1100 ℃ for 5 times of heat shock and water cooling is 65-69%.
Example 2:
al (aluminum)2O3The preparation method of the-SiC-C refractory castable comprises the steps of taking 26-29 parts by mass of silicon carbide particles, 58-62 parts by mass of alumina aggregate, 4-6 parts by mass of α -alumina micropowder and 3-3.5 parts by mass of a bonding agent as raw materials, taking 0.6-1.2 parts by mass of silica micropowder, 0.5-2.5 parts by mass of spherical asphalt, 3-4.5 parts by mass of zircon sand, 0.5-1.5 parts by mass of metallic silicon powder and 0.06-0.16 part by mass of a water reducing agent as additives, and uniformly mixing to obtain the Al-SiC-C refractory castable by dry blending to obtain the Al-2O3-SiC-C refractory castable.
Al prepared in this example2O3The strength retention rate of the-SiC-C refractory castable product at room temperature after heat treatment at 1450 ℃ for × 3 hours is 13-14 MPa, and the strength retention rate is 68-71% after heat shock and water cooling at 1100 ℃ for 5 times.
Example 3:
al (aluminum)2O3The preparation method of the-SiC-C refractory castable comprises the steps of taking 22-26 parts by mass of silicon carbide particles, 62-65 parts by mass of alumina aggregate, 6-8 parts by mass of α -alumina micropowder and 3.5-4 parts by mass of a bonding agent as raw materials, taking 0.6-1.2 parts by mass of silica micropowder, 0.5-2.5 parts by mass of spherical asphalt, 4.5-5.5 parts by mass of zircon sand, 0.5-1.5 parts by mass of metallic silicon powder and 0.06-0.16 part by mass of a water reducing agent as additives, and uniformly mixing to obtain the Al refractory castable2O3-SiC-C refractory castable.
Al prepared in this example2O3The strength retention rate of the-SiC-C refractory castable product at the normal temperature after heat treatment at 1450 ℃ for × 3 hours is 14-15 MPa, and the strength retention rate at 1100 ℃ for 5 times of heat shock and water cooling is 69-72%.
Compared with the prior art, the application has the following positive effects:
the invention adopts zircon sand as an additive to add Al2O3the-SiC-C refractory castable plays a significant role in promoting the erosion resistance and strength of materials. The main reason is zirconium dioxide and fused silica phase generated by decomposing zircon sand under high temperature condition. The zirconium dioxide can generate volume expansion through phase change to inhibit the expansion of cracks in the matrix, so that the toughness and the thermal shock stability of the material are improved. In addition, the fused quartz generated by decomposition can react with the alumina in the matrix at high temperature to generate mullite, so that the mechanical strength and the corrosion resistance of the material are improved.
Al prepared by the invention2O3The normal-temperature breaking strength of the-SiC-C refractory castable product after heat treatment at 1450 ℃ for × 3 hours is 12-15 MPa, the strength retention rate is 65-72% after heat shock and water cooling at 1100 ℃ for 5 times, and the Al content is remarkably improved2O3The strength and the thermal shock resistance of the-SiC-C refractory castable.
Therefore, Al is significantly promoted by adding zircon sand2O3The strength, thermal shock stability and erosion resistance of the-SiC-C refractory castable.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. Al (aluminum)2O3The preparation method of the-SiC-C refractory castable is characterized by taking 22-32 parts by mass of silicon carbide particles, 55-65 parts by mass of alumina aggregate, 2-8 parts by mass of α -alumina micro powder and 2-4 parts by mass of a bonding agent as raw materials, and taking 0.6-1.2 parts by mass of silicon micro powder, 0.5-2.5 parts by mass of spherical asphalt, 1.5-5.5 parts by mass of zircon sand, 0.5-1.5 parts by mass of metallic silicon powder and 0.06-0.16 part by mass of water reducing agentThe agent is an additive and is dry-mixed uniformly to obtain Al2O3-SiC-C refractory castable.
2. Al according to claim 12O3The preparation method of the-SiC-C refractory castable is characterized in that the alumina aggregate comprises the following chemical components: al (Al)2O3More than or equal to 86 wt%; the bauxite aggregate composition is as follows: the alumina aggregate with the particle size of 5-8 mm accounts for 32-38%, the alumina aggregate with the particle size of 3-5 mm accounts for 25-31%, and the alumina aggregate with the particle size of 1-3 mm accounts for 33-37%.
3. Al according to claim 12O3The preparation method of the-SiC-C refractory castable is characterized in that the silicon carbide comprises the following chemical components: SiC is more than or equal to 97 wt%; the silicon carbide particle composition is as follows: the silicon carbide particles have the particle size of 0.075-1 mm accounting for 40-60% of the silicon carbide, the particle size of 0.044-0.075 mm accounting for 20-36% of the silicon carbide, and the particle size of 0-0.044 mm accounting for 20-28% of the silicon carbide.
4. Al according to claim 12O3The preparation method of the-SiC-C refractory castable is characterized in that the grain size of the α -alumina micropowder is less than or equal to 0.008 mm.
5. Al according to claim 12O3The preparation method of the-SiC-C refractory castable is characterized in that the grain size of the silicon micro powder is less than or equal to 0.045 mm.
6. Al according to claim 12O3The preparation method of the-SiC-C refractory castable is characterized in that the grain size of the spherical asphalt is less than or equal to 0.1 mm.
7. Al according to claim 12O3The preparation method of the-SiC-C refractory castable is characterized in that the zircon sand comprises the following chemical components: SiO 2227 to 40 wt% of ZrO260 to 70 wt% of Al2O30.1 to 0.5 wt.% of Fe2O30.05 to 0.5 wt%CaO + MgO in an amount of 0.05 to 1.0 wt%; the loss of zircon sand after burning is 3-5 wt%; the diameter of the zircon sand is less than 0.074 mm.
8. Al according to claim 12O3The preparation method of the-SiC-C refractory castable is characterized in that the particle size of the metal silicon powder is less than or equal to 0.05 mm.
9. Al according to any one of claims 1 to 82O3Al prepared by preparation method of-SiC-C refractory castable2O3-SiC-C refractory castable.
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| CN112979327A (en) * | 2021-02-05 | 2021-06-18 | 湖南华菱涟源钢铁有限公司 | Castable for ladle slag-off plate, ladle slag-off plate and preparation method thereof |
| CN115180929A (en) * | 2022-06-29 | 2022-10-14 | 无锡市宝宜耐火材料有限公司 | Anti-oxidation Al 2 O 3 -SiC-C refractory castable and preparation method thereof |
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