CN117736003A - Silica sol combined carbonaceous castable and preparation method and application thereof - Google Patents
Silica sol combined carbonaceous castable and preparation method and application thereof Download PDFInfo
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- CN117736003A CN117736003A CN202311795442.5A CN202311795442A CN117736003A CN 117736003 A CN117736003 A CN 117736003A CN 202311795442 A CN202311795442 A CN 202311795442A CN 117736003 A CN117736003 A CN 117736003A
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- silica sol
- diglycidyl ether
- castable
- graphite particles
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- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000002245 particle Substances 0.000 claims abstract description 54
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 50
- -1 diglycidyl ether modified graphite Chemical class 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 27
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 13
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000000740 bleeding effect Effects 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 5
- 239000003112 inhibitor Substances 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 229910002804 graphite Inorganic materials 0.000 claims description 24
- 239000010439 graphite Substances 0.000 claims description 24
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 11
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 10
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 9
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 9
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- WTYYGFLRBWMFRY-UHFFFAOYSA-N 2-[6-(oxiran-2-ylmethoxy)hexoxymethyl]oxirane Chemical compound C1OC1COCCCCCCOCC1CO1 WTYYGFLRBWMFRY-UHFFFAOYSA-N 0.000 claims description 7
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 7
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 229920005646 polycarboxylate Polymers 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- UWFRVQVNYNPBEF-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)propan-1-one Chemical compound CCC(=O)C1=CC=C(C)C=C1C UWFRVQVNYNPBEF-UHFFFAOYSA-N 0.000 claims description 3
- SHKUUQIDMUMQQK-UHFFFAOYSA-N 2-[4-(oxiran-2-ylmethoxy)butoxymethyl]oxirane Chemical compound C1OC1COCCCCOCC1CO1 SHKUUQIDMUMQQK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 229920001353 Dextrin Polymers 0.000 claims description 2
- 239000004375 Dextrin Substances 0.000 claims description 2
- 235000019425 dextrin Nutrition 0.000 claims description 2
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 2
- 238000003756 stirring Methods 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 12
- 229910021383 artificial graphite Inorganic materials 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000001914 filtration Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 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
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Abstract
The invention relates to the technical field of castable, and provides a silica sol combined carbon castable as well as a preparation method and application thereof. The silica sol-bonded carbonaceous castable comprises the following components in parts by mass: 55-65 parts of diglycidyl ether modified graphite particles, 3-8 parts of graphite powder, 22-32 parts of silicon carbide, 3-8 parts of aluminum oxide, 3-6 parts of silica powder, 10-15 parts of silica sol, 0.05-0.15 part of water reducer and 0.02-0.2 part of bleeding inhibitor. Through the technical scheme, the problems of bleeding and poor physicochemical properties of the carbonaceous castable in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of castable, in particular to a silica sol combined carbon castable and a preparation method and application thereof.
Background
The blast furnace is an important high-temperature kiln in the steel industry, and the longevity and the enlargement of the blast furnace are the current development direction, so that higher requirements are necessarily put forward on the lining material of the blast furnace. The heat conductivity coefficient of the gap material between the leveling layer of the water cooling pipe at the bottom of the blast furnace and the carbon bricks and the cooling wall greatly affects the hearth cooling system of the blast furnace and is critical to the long-service-life operation of the blast furnace.
At present, the gap materials between the leveling layer of the blast furnace bottom water cooling pipe and the carbon bricks and the cooling wall are mostly carbon ramming materials combined by resin or tar, the construction difficulty is high, layering and repeated ramming are needed, and the construction quality is more influenced by human factors. In addition, the carbon ramming mass combined with the resin or the tar contains organic volatile matters harmful to human bodies, and is not friendly to the environment. And in the process of heating up the material, the bound water of the cement hydration product can be removed, and the rapid dehydration of a large amount of bound water can cause the bursting of the material or the generation of a large amount of cracks in the material, thereby causing the reduction of the physical and chemical properties of the material, in particular the strength and the heat conductivity.
In addition, the main raw materials in the carbonaceous castable have poor wettability with water, and slurry, particles and water of the carbonaceous castable are easy to separate, so that the castable can bleed.
Disclosure of Invention
The invention provides a silica sol combined carbon castable and a preparation method and application thereof, and solves the problems of bleeding and poor physicochemical properties of the carbon castable in the related art.
The technical scheme of the invention is as follows:
the silica sol-bonded carbonaceous castable comprises the following components in parts by mass: 55-65 parts of diglycidyl ether modified graphite particles, 3-8 parts of graphite powder, 22-32 parts of silicon carbide, 3-8 parts of aluminum oxide, 3-6 parts of silica powder, 10-15 parts of silica sol, 0.05-0.15 part of water reducer and 0.02-0.2 part of bleeding inhibitor.
As a further technical scheme, the raw materials of the diglycidyl ether modified graphite particles comprise graphite particles and diglycidyl ether in a mass ratio of 1:0.3-0.8.
As a further technical scheme, the diglycidyl ether comprises one or more of 1, 6-hexanediol diglycidyl ether, 1, 4-butanediol diglycidyl ether and ethylene glycol diglycidyl ether.
As a further technical scheme, the preparation method of the diglycidyl ether modified graphite particles comprises the following steps: and mixing graphite particles, diglycidyl ether, an alkaline catalyst and water, and reacting to obtain diglycidyl ether modified graphite particles.
As a further technical scheme, the reaction temperature is 90-95 ℃ and the reaction time is 2-4 hours.
As a further technical scheme, the alkaline catalyst comprises one or two of sodium hydroxide and potassium hydroxide.
As a further technical scheme, the graphite powder comprises one or two of graphite powder and superfine flake graphite powder.
As a further technical scheme, the water reducer comprises one or two of naphthalene water reducer and polycarboxylate water reducer.
As a further technical scheme, the bleeding inhibitor comprises one or more of glycol, glycerol, triethanolamine, sodium dodecyl benzene sulfonate, sodium alkyl sulfate, carboxymethyl cellulose and yellow dextrin.
The invention provides a preparation method of a silica sol combined carbon castable, which comprises the following steps: and uniformly mixing the components in parts by mass to obtain the silica sol combined carbon castable.
The invention also provides application of the silica sol combined carbon castable or the silica sol combined carbon castable prepared by the preparation method in a blast furnace.
The working principle and the beneficial effects of the invention are as follows:
1. the invention adopts silica sol combined with carbon castable, can realize quick drying and baking, shortens the construction period of the castable, and is energy-saving and environment-friendly. The silica sol is used as a binding agent to replace calcium aluminate cement, so that the bursting phenomenon in the baking process of the castable can be effectively avoided, the possibility of quick baking and construction is provided for the castable, and the construction period is greatly shortened.
2. According to the bleeding-preventing agent, the surface properties of the carbonaceous material and water are improved, so that the wetting angle of the carbonaceous material and water is reduced, the bleeding phenomenon is reduced, and the workability and the physicochemical properties of the carbonaceous castable are improved.
3. According to the invention, diglycidyl ether is adopted to modify graphite particles, so that ether oxygen atoms and functional groups are endowed to the surfaces of the graphite particles, the bonding compactness of the graphite particles and the rest raw materials of the castable is improved, and particularly the interfacial cohesiveness with silica sol is improved, and because the ether oxygen atoms are combined with silicon hydroxyl groups in the silica sol, physical adsorption is formed. Therefore, the diglycidyl ether modified graphite particles can make the castable more compact in the whole structure, thereby improving the strength and the heat conductivity of the castable.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill 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.
In the following examples and comparative examples:
the graphite particles are artificial graphite particles, the fixed carbon content is more than or equal to 97wt%, the ash content is less than or equal to 0.1wt%, and the powder resistivity is less than or equal to 130 mu omega m;
the graphite powder is artificial graphite powder with the particle size less than or equal to 0.045mm;
the fixed carbon content in the superfine flake graphite powder is more than or equal to 94.5wt percent, and the ash content is less than or equal to 4.5wt percent;
the silicon carbide content in the silicon carbide is more than or equal to 97 weight percent, and the granularity is less than or equal to 0.074mm;
alumina is alpha-Al 2 O 3 Micro powder, D50 particle size 2 μm, al 2 O 3 The content is more than 99wt%;
SiO in the silicon micropowder 2 The content is more than 92 weight percent, and the grain diameter is less than or equal to 1 mu m;
the solid content of the silica sol was 30wt%;
the naphthalene water reducer is a Point-N200 naphthalene high-efficiency water reducer;
the polycarboxylate water reducer is polycarboxylate water reducer 530P.
Example 1
S1, dissolving 19.5g of 1, 6-hexanediol diglycidyl ether in 800mL of water, adding 0.1g of sodium hydroxide and 65g of graphite particles, stirring at 95 ℃ for reaction for 3 hours, and filtering out the graphite particles to obtain diglycidyl ether modified graphite particles;
s2, placing 59 parts of diglycidyl ether modified graphite particles, 3 parts of artificial graphite powder, 3 parts of ultrafine crystalline flake graphite powder, 27 parts of silicon carbide, 3 parts of aluminum oxide, 5 parts of silicon micropowder, 0.02 part of carboxymethyl cellulose and 0.1 part of naphthalene water reducer into a stirrer for stirring uniformly, and adding 12.8 parts of silica sol for continuous stirring to obtain the silica sol-bonded carbon castable.
Example 2
S1, dissolving 19.5g of 1, 6-hexanediol diglycidyl ether in 800mL of water, adding 0.15g of potassium hydroxide and 65g of graphite particles, stirring at 93 ℃ for reaction for 2 hours, and filtering out the graphite particles to obtain diglycidyl ether modified graphite particles;
s2, placing 65 parts of diglycidyl ether modified graphite particles, 3 parts of artificial graphite powder, 5 parts of ultrafine crystalline flake graphite powder, 22 parts of silicon carbide, 5 parts of aluminum oxide, 3 parts of silicon micropowder, 0.2 part of ethylene glycol and 0.05 part of naphthalene water reducer into a stirrer for stirring uniformly, adding 15 parts of silica sol, and continuously stirring to obtain the silica sol combined carbon castable.
Example 3
S1, dissolving 19.5g of 1, 6-hexanediol diglycidyl ether in 800mL of water, adding 0.1g of sodium hydroxide and 65g of graphite particles, stirring at 90 ℃ for reaction for 4 hours, and filtering out the graphite particles to obtain diglycidyl ether modified graphite particles;
s2, placing 55 parts of diglycidyl ether modified graphite particles, 2 parts of artificial graphite powder, 1 part of ultrafine crystalline flake graphite powder, 32 parts of silicon carbide, 8 parts of aluminum oxide, 6 parts of silicon micropowder, 0.15 part of triethanolamine and 0.15 part of polycarboxylate water reducer into a stirrer for stirring uniformly, and adding 10 parts of silica sol for continuous stirring to obtain the silica sol-bonded carbon castable.
Example 4
S1, dissolving 32.5g of 1, 6-hexanediol diglycidyl ether in 800mL of water, adding 0.1g of sodium hydroxide and 65g of graphite particles, stirring at 95 ℃ for reaction for 3 hours, and filtering out the graphite particles to obtain diglycidyl ether modified graphite particles;
s2, placing 59 parts of diglycidyl ether modified graphite particles, 3 parts of artificial graphite powder, 3 parts of ultrafine crystalline flake graphite powder, 27 parts of silicon carbide, 3 parts of aluminum oxide, 5 parts of silicon micropowder, 0.02 part of carboxymethyl cellulose and 0.1 part of naphthalene water reducer into a stirrer for stirring uniformly, and adding 12.8 parts of silica sol for continuous stirring to obtain the silica sol-bonded carbon castable.
Example 5
S1, dissolving 52g of 1, 6-hexanediol diglycidyl ether in 800mL of water, adding 0.1g of sodium hydroxide and 65g of graphite particles, stirring at 95 ℃ for reaction for 3 hours, and filtering out the graphite particles to obtain diglycidyl ether modified graphite particles;
s2, placing 59 parts of diglycidyl ether modified graphite particles, 3 parts of artificial graphite powder, 3 parts of ultrafine crystalline flake graphite powder, 27 parts of silicon carbide, 3 parts of aluminum oxide, 5 parts of silicon micropowder, 0.02 part of carboxymethyl cellulose and 0.1 part of naphthalene water reducer into a stirrer for stirring uniformly, and adding 12.8 parts of silica sol for continuous stirring to obtain the silica sol-bonded carbon castable.
Example 6
S1, dissolving 32.5g of 1, 4-butanediol diglycidyl ether in 800mL of water, adding 0.1g of sodium hydroxide and 65g of graphite particles, stirring at 95 ℃ for reaction for 3 hours, and filtering out the graphite particles to obtain diglycidyl ether modified graphite particles;
s2, placing 59 parts of diglycidyl ether modified graphite particles, 3 parts of artificial graphite powder, 3 parts of ultrafine crystalline flake graphite powder, 27 parts of silicon carbide, 3 parts of aluminum oxide, 5 parts of silicon micropowder, 0.02 part of carboxymethyl cellulose and 0.1 part of naphthalene water reducer into a stirrer for stirring uniformly, and adding 12.8 parts of silica sol for continuous stirring to obtain the silica sol-bonded carbon castable.
Example 7
S1, dissolving 32.5g of ethylene glycol diglycidyl ether in 800mL of water, adding 0.1g of sodium hydroxide and 65g of graphite particles, stirring at 95 ℃ for reaction for 3 hours, and filtering out the graphite particles to obtain diglycidyl ether modified graphite particles;
s2, placing 59 parts of diglycidyl ether modified graphite particles, 3 parts of artificial graphite powder, 3 parts of ultrafine crystalline flake graphite powder, 27 parts of silicon carbide, 3 parts of aluminum oxide, 5 parts of silicon micropowder, 0.02 part of carboxymethyl cellulose and 0.1 part of naphthalene water reducer into a stirrer for stirring uniformly, and adding 12.8 parts of silica sol for continuous stirring to obtain the silica sol-bonded carbon castable.
Comparative example 1
59 parts of graphite particles, 3 parts of artificial graphite powder, 3 parts of ultrafine crystalline flake graphite powder, 27 parts of silicon carbide, 3 parts of aluminum oxide, 5 parts of silicon micropowder, 0.02 part of carboxymethyl cellulose and 0.1 part of naphthalene water reducer are put into a stirrer to be uniformly stirred, and 12.8 parts of silica sol is added to be continuously stirred, so that the silica sol combined carbon castable is obtained.
Comparative example 2
The only difference from example 1 is that no carboxymethyl cellulose was added.
Comparative example 3
The only difference from example 2 is that no ethylene glycol was added.
Comparative example 4
The only difference from example 3 is that no triethanolamine was added.
The silica sol-combined carbon castable obtained in examples 1-7 and comparative examples 1-4 are poured into gaps between a blast furnace bottom leveling layer and a blast furnace carbon brick and a cooling wall which need to be constructed, and a small vibrator is used for promoting material leveling, so that the surfaces of examples 1-7 and comparative example 1 are free from bleeding, the surfaces after hardening are flat and smooth, no hole and pitting surface are caused, and coarse air holes are avoided after the sections are cut. And bleeding occurs on the surface of comparative examples 2 to 4, the hardened surface is rough, holes appear, and a few coarse pores exist after the fracture surface is cut. After the anti-bleeding agent is added, the bleeding phenomenon can be effectively improved, and the construction performance and the physical and chemical properties of the carbon castable are improved.
Placing the silica sol combined with the carbonaceous castable obtained in the examples 1-7 and the comparative example 1 in a mould for vibration molding, demoulding after the sample is hardened, drying in a baking oven at 110 ℃ for 24 hours, and testing the compressive strength by referring to the method in GB/T5072-2008 refractory normal temperature compressive strength test method; the volume density is tested by referring to the method in GB/T2997-2015 method for testing the volume density, apparent porosity and true porosity of a compact shaped refractory product; the heat conductivity coefficient is tested by referring to the method in GB/T5990-2021 method for testing heat conductivity coefficient, specific heat capacity and thermal diffusion coefficient of refractory materials (hot wire method); the test results are recorded in table 1.
TABLE 1 compressive Strength, bulk Density and Heat conductivity of silica sol-bonded carbonaceous castable
As can be seen from Table 1, the compressive strength of the silica sol-bonded carbonaceous castable provided by the invention is more than 23.1MPa, and the bulk density is 1.79g/cm 3 The heat conductivity coefficient is 20.2 W.m -1 •K -1 The ceramic material has high compression strength and good heat conducting performance.
Examples 1 to 7 compared with comparative example 1, the diglycidyl ether modified graphite particles used in examples 1 to 7, in which the graphite particles are not modified in comparative example 1, the compressive strength, bulk density and thermal conductivity of the silica sol-bonded carbonaceous castable obtained in examples 1 to 7 are higher than those of comparative example 1, indicating that the diglycidyl ether modified graphite particles can improve the compressive strength and thermal conductivity of the silica sol-bonded carbonaceous castable.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The silica sol-bonded carbonaceous castable is characterized by comprising the following components in parts by mass: 55-65 parts of diglycidyl ether modified graphite particles, 3-8 parts of graphite powder, 22-32 parts of silicon carbide, 3-8 parts of aluminum oxide, 3-6 parts of silica powder, 10-15 parts of silica sol, 0.05-0.15 part of water reducer and 0.02-0.2 part of bleeding inhibitor.
2. The silica sol-bonded carbonaceous castable according to claim 1, wherein the raw materials of the diglycidyl ether modified graphite particles include graphite particles and diglycidyl ether in a mass ratio of 1:0.3-0.8.
3. A silica sol bonded carbonaceous castable according to claim 2, wherein the diglycidyl ether comprises one or more of 1, 6-hexanediol diglycidyl ether, 1, 4-butanediol diglycidyl ether, ethylene glycol diglycidyl ether.
4. The silica sol-bonded carbonaceous castable according to claim 2, wherein the preparation method of the diglycidyl ether modified graphite particles includes the steps of: and mixing graphite particles, diglycidyl ether, an alkaline catalyst and water, and reacting to obtain diglycidyl ether modified graphite particles.
5. The silica sol-bonded carbonaceous castable according to claim 4, wherein the reaction temperature is 90-95 ℃ and the reaction time is 2-4 hours.
6. The silica sol-bonded carbonaceous castable according to claim 4, wherein said basic catalyst comprises one or both of sodium hydroxide and potassium hydroxide.
7. The silica sol-bonded carbonaceous castable according to claim 1, wherein said graphite powder comprises one or both of graphite powder and ultrafine flake graphite powder;
the water reducer comprises one or two of naphthalene water reducer and polycarboxylate water reducer.
8. A silica sol bonded carbonaceous castable according to claim 1, wherein the anti-bleeding agent comprises one or more of ethylene glycol, glycerol, triethanolamine, sodium dodecylbenzenesulfonate, sodium alkyl sulfate, carboxymethyl cellulose, yellow dextrin.
9. The preparation method of the silica sol-bonded carbonaceous castable according to any one of claims 1 to 8, comprising the following steps: and uniformly mixing the components in parts by mass to obtain the silica sol combined carbon castable.
10. The silica sol-bonded carbonaceous castable according to any one of claims 1 to 8 or the silica sol-bonded carbonaceous castable prepared by the preparation method of claim 9, for use in a blast furnace.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311795442.5A CN117736003A (en) | 2023-12-25 | 2023-12-25 | Silica sol combined carbonaceous castable and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311795442.5A CN117736003A (en) | 2023-12-25 | 2023-12-25 | Silica sol combined carbonaceous castable and preparation method and application thereof |
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