CN113754417B - Environment-friendly low-carbon aluminum-carbon non-fired brick for sliding plate and preparation method thereof - Google Patents
Environment-friendly low-carbon aluminum-carbon non-fired brick for sliding plate and preparation method thereof Download PDFInfo
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- CN113754417B CN113754417B CN202111205147.0A CN202111205147A CN113754417B CN 113754417 B CN113754417 B CN 113754417B CN 202111205147 A CN202111205147 A CN 202111205147A CN 113754417 B CN113754417 B CN 113754417B
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 39
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000011451 fired brick Substances 0.000 title abstract description 5
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 78
- 239000010431 corundum Substances 0.000 claims abstract description 78
- 239000000843 powder Substances 0.000 claims abstract description 63
- 239000011449 brick Substances 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 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 14
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 229910000676 Si alloy Inorganic materials 0.000 claims abstract description 11
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 229910052796 boron Inorganic materials 0.000 claims abstract description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 239000007767 bonding agent Substances 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 41
- 238000002156 mixing Methods 0.000 claims description 13
- 239000004927 clay Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims description 7
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910052580 B4C Inorganic materials 0.000 claims description 2
- 229910052582 BN Inorganic materials 0.000 claims description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 2
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims 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 claims description 2
- 229910052863 mullite Inorganic materials 0.000 claims description 2
- 238000009749 continuous casting Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000009628 steelmaking Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract description 2
- 239000005011 phenolic resin Substances 0.000 abstract description 2
- 229920001568 phenolic resin Polymers 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 abstract description 2
- 238000002791 soaking Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 3
- -1 aluminum zirconium carbon Chemical compound 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- PUAQLLVFLMYYJJ-UHFFFAOYSA-N 2-aminopropiophenone Chemical compound CC(N)C(=O)C1=CC=CC=C1 PUAQLLVFLMYYJJ-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses an environment-friendly low-carbon aluminum-carbon non-fired brick for a sliding plate and a preparation method thereof, belonging to the technical field of refractory materials for steelmaking and continuous casting. The environment-friendly low-carbon aluminum-carbon unburned brick comprises the following raw materials, by weight, 65-70% of corundum aggregate, 5-15% of corundum fine powder, 10-15% of aluminum-silicon alloy powder, 5~8% of activated alumina fine powder, 2~4% of carbon, 1~4% of boron-containing additive and an inorganic binder which accounts for 5~6% of the total weight of the raw materials. The preparation process comprises the steps of pressing and molding the mixed raw materials under 150MPa, drying at 110-200 ℃, drilling, drying at 100-120 ℃ to remove water in the drilled hole, and then grinding, hooping, adhering a shell and coating the surface to prepare the environment-friendly low-carbon aluminum-carbon unburned sliding brick. The invention uses environment-friendly inorganic bonding agent to replace phenolic resin, and adopts a method of no-burning and no-oil-soaking to prepare the aluminum-carbon slide plate, and the prepared aluminum-carbon slide plate is an environment-friendly non-burning low-carbon aluminum-carbon slide plate material which has the advantages of energy saving, environment protection, lower production cost and good medium-temperature strength.
Description
Technical Field
The invention belongs to the technical field of refractory materials for steelmaking and continuous casting, and relates to a preparation method of an environment-friendly low-carbon aluminum-carbon sliding plate unburned brick for controlling the flow of molten steel.
Background
With the continuous popularization and application of new steelmaking and continuous casting technologies and the development of certain varieties of steel (high-oxygen steel, calcium-treated steel, clean steel and the like), the sliding plate is subjected to strong thermal shock, erosive wear of high-temperature molten steel, erosion of environmental media and larger temperature fluctuation in the using process, and the working environment of the sliding plate is worse. At present, the aluminum carbon and aluminum zirconium carbon sliding plates which are commonly used in continuous casting have cracks, galling and oxidation in different degrees, which influence the further improvement of the service life, thereby being incapable of better adapting to the requirements of new continuous casting technology. And the aluminum carbon and aluminum zirconium carbon sliding plates adopt a high-temperature sintering process, so that the energy consumption is high and the environmental pollution is serious.
In recent years, a series of novel sliding plates are prepared by adopting an unfired process, and the novel sliding plates have certain energy-saving and environment-friendly effects. But the binding agent of the unfired sliding plate is phenolic resinDuring application, organic volatile matters are decomposed to generate pollution to air and harmful to human health, and greenhouse gas CO generated by carbon oxidation of resin 2 Causing the climate to warm.
In addition, phenolic resin is decomposed and oxidized in a medium-temperature area (300 to 700 ℃) to cause the medium-temperature strength of the sliding plate to be obviously reduced, and a low-strength valley is generated at about 600 ℃, so that the sliding surface of the sliding plate is easy to be napped, broken, a cast hole is not resistant to scouring and the like when the sliding plate is used, blocks of the sliding plate in a non-slip area (about 600 ℃) are easy to fall off, potential safety hazards are caused to steelmaking continuous casting, and the wide application of the non-burning sliding plate is limited.
Therefore, the preparation of the environment-friendly low-carbon aluminum-carbon sliding plate without brick burning is urgent.
Disclosure of Invention
The invention aims to provide a preparation method of an environment-friendly low-carbon aluminum-carbon slide plate unburned brick. The aluminum-carbon sliding plate prepared by the preparation method is an environment-friendly unfired low-carbon aluminum-carbon sliding plate material which is energy-saving, environment-friendly, low in production cost and good in medium-temperature strength.
In order to achieve the purpose, the invention adopts the technical scheme that:
an environment-friendly low-carbon aluminum-carbon unburned brick for a sliding plate comprises the following raw materials, by weight, 65-70% of corundum aggregate, 5-15% of corundum fine powder, 10-15% of aluminum-silicon alloy powder, 5~8% of activated alumina fine powder, 2~4% of carbon, 1~4% of boron-containing additive and an inorganic binder which accounts for 5~6% of the total raw materials.
Furthermore, the corundum aggregate is one or more of white corundum particles, compact corundum particles and tabular corundum particles, and the critical particle size is 3mm.
Further, the corundum fine powder is one or more of white corundum fine powder, compact corundum fine powder and tabular corundum fine powder, and the particle size of the corundum fine powder is less than 88 micrometers.
Furthermore, the alumina content in the white corundum particles or fine powder, the alumina content in the compact corundum or fine powder and the alumina content in the tabular corundum or fine powder are respectively 98wt% -99.5 wt%, 98.5wt% -99.5 wt% and 98.5wt wt% -99.5 wt%, and the critical particle size is 3mm.
Further, the carbon is one or two of graphite and carbon black.
Further, the boron-containing additive is one or more of boron carbide, boron nitride and zirconium boride, and the granularity is less than 0.044mm.
Further, the inorganic binder is one or more of clay, pure calcium aluminate cement and phosphate.
Further, the phosphate is aluminum dihydrogen phosphate.
The preparation method of the environment-friendly low-carbon aluminum-carbon sliding plate unburned brick comprises the following steps:
(1) Firstly, premixing various fine powders, namely uniformly stirring and stirring corundum fine powder, aluminum-silicon alloy powder, activated alumina micro powder, carbon, boron-containing additive and inorganic binder in a double-cone stirrer to prepare premixed powder;
(2) Premixing corundum aggregate, and stirring and mixing 3-0mm white corundum particles, 3-0mm compact corundum particles and 3-0mm tabular corundum particles to obtain the premixed corundum aggregate;
(3) Adding the premixed powder in the step (1) into the premixed corundum aggregate in the step (2), then adding water accounting for 6% of the total raw materials, and uniformly mixing;
(4) And (3) pressing and molding the mixed materials under 150MPa, drying at 110-200 ℃, drilling, drying at 100-120 ℃ to remove water in the drilled hole, and then grinding, hooping, adhering a shell and coating to prepare the environment-friendly low-carbon aluminum-carbon unburned sliding brick.
According to the technical scheme, the forming density of the unfired sliding plate is improved by utilizing the plasticity of the clay, and the clay generates mullite at high temperature, so that the high-temperature performance of the unfired sliding plate is improved; the low-temperature strength of the unfired sliding plate can be improved by using the pure calcium aluminate cement and the phosphate.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts environment-friendly inorganic bonding agent, so that the unfired sliding plate does not produce pollutants in the preparation and application processes, and is beneficial to environmental protection.
2. The invention adopts inorganic bonding agent, the strength is not reduced at about 600 ℃, and the problem of block falling in the non-burning sliding-proof area of the sliding plate is solved.
3. The invention has the characteristic of low carbon content, the total carbon content of the current sliding plates of aluminum carbon, aluminum zirconium carbon and the like is 10 to 14 percent, and the environment-friendly low-carbon unburned Al 2 O 3 The carbon content of the-C sliding plate is reduced to be below 4 percent, which is beneficial to clean steel smelting.
4. The invention adopts the non-burning process, can effectively save energy, reduce labor intensity and shorten production period.
Detailed Description
The technical solutions and effects of the present invention will be further described with reference to specific examples, but the scope of the present invention is not limited thereto.
Example 1
The environment-friendly low-carbon aluminum-carbon non-fired brick for the skateboard comprises, by weight, corundum fine powder (10% of white corundum fine powder and 5% of tabular corundum fine powder), corundum aggregate (20% of white corundum particles, 25% of compact corundum particles and 20% of tabular corundum particles), aluminum-silicon alloy powder 10%, activated alumina micro powder 7%, graphite 1%, carbon black 1%, B 4 C1%, and additional inorganic binder 5% (3% clay, 2% cement).
The preparation method of the environment-friendly low-carbon aluminum-carbon sliding plate unburned brick comprises the following steps:
1) Firstly, corundum fine powder, aluminum-silicon alloy powder, active alumina micro powder, graphite, carbon black and B 4 C. Stirring clay and cement in a double-cone stirrer uniformly to prepare premixed powder;
2) Respectively taking 3-0mm white corundum particles, 3-0mm compact corundum particles and 3-0mm tabular corundum particles, stirring and mixing, adding the premixed powder in 1) into the corundum particles after uniformly mixing, then adding water accounting for 6% of the total weight of the raw materials, and uniformly mixing;
3) And (3) pressing and molding the mixed materials under 150MPa, drying at 110 ℃ for 24h, drilling, drying at 100-120 ℃ for 8h to remove the water in the drilled hole, and then grinding, hooping, adhering a shell and coating to prepare the environment-friendly low-carbon aluminum-carbon unburned sliding brick.
The apparent porosity of the product obtained in this example was 5.8%, the room-temperature compressive strength was 120MPa, the medium-temperature strength at 600 ℃ was 9.5MPa, and the high-temperature flexural strength was 40MPa.
Example 2
The environment-friendly low-carbon aluminum-carbon slide plate unburned brick comprises, by weight, corundum fine powder (5% of white corundum fine powder), corundum aggregate (20% of white corundum particles, 25% of compact corundum particles, 25% of tabular corundum particles), 15% of aluminum-silicon alloy powder, 5% of activated alumina micro powder, 4% of graphite, 1% of BN, and 6% of an additional inorganic binder (3% of clay, 2% of pure calcium aluminate cement, 1% of aluminum dihydrogen phosphate).
The preparation method of the environment-friendly low-carbon aluminum-carbon sliding plate unburned brick comprises the following steps:
1) Firstly, corundum fine powder, aluminium-silicon alloy powder, graphite and B 4 C. Uniformly stirring BN, clay, cement and aluminum dihydrogen phosphate in a double-cone stirrer to prepare premixed powder;
2) Respectively taking 3-0mm white corundum particles, 3-0mm compact corundum particles and 3-0mm tabular corundum particles, stirring and mixing, adding the premixed powder in 1) into the corundum particles after uniformly mixing, then adding water accounting for 6.5% of the total weight of the raw materials, and uniformly mixing;
3) And (3) pressing and molding the mixed materials under 150MPa, drying at 150 ℃ for 24h, drilling, drying at 100-120 ℃ for 8h to remove the water in the drilled hole, and then grinding, hooping, adhering a shell and coating to prepare the environment-friendly low-carbon aluminum-carbon unburned sliding brick.
The apparent porosity of the product obtained in this example was 5.4%, the room-temperature compressive strength was 130MPa, the medium-temperature strength at 600 ℃ was 12.0MPa, and the high-temperature flexural strength was 45MPa.
Example 3
The environment-friendly low-carbon aluminum-carbon non-fired brick for the slide plate comprises, by weight, corundum fine powder (3% of compact corundum fine powder and 5% of tabular corundum fine powder), corundum aggregate (15% of white corundum particles, 25% of compact corundum particles and 27% of tabular corundum particles), aluminum-silicon alloy powder 11%, and active aluminum-silicon alloy powder8% of alumina micro powder, 2% of graphite and B 4 1 percent of C, 1 percent of BN, 2 percent of zirconium boride and 6 percent of inorganic bonding agent (3 percent of clay, 2 percent of pure calcium aluminate cement and 1 percent of aluminum dihydrogen phosphate).
The preparation method of the environment-friendly low-carbon aluminum-carbon sliding plate unburned brick comprises the following steps:
1) Firstly, corundum fine powder, aluminum-silicon alloy powder, activated alumina micro powder, graphite and B 4 C. Uniformly stirring BN, clay, cement and aluminum dihydrogen phosphate in a double-cone stirrer to prepare premixed powder;
2) Respectively taking 3-0mm white corundum particles, 3-0mm compact corundum particles and 3-0mm tabular corundum particles, stirring and mixing, adding the premixed powder in 1) into the corundum particles after uniform mixing, then adding water accounting for 6.5% of the total weight of the raw materials, and uniformly mixing;
3) And (3) pressing and molding the mixed materials under 150MPa, drying at 200 ℃ for 24h, drilling, drying at 100-120 ℃ for 8h to remove water in the drilled hole, and then grinding, hooping, bonding a shell and coating the surface to prepare the environment-friendly low-carbon aluminum-carbon unfired slide plate brick.
The apparent porosity of the product obtained in this example was 5.0%, the room-temperature compressive strength was 135MPa, the medium-temperature strength at 600 ℃ was 12.0MPa, and the high-temperature flexural strength was 48MPa.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The environment-friendly low-carbon aluminum-carbon sliding plate unburned brick is characterized by comprising the following raw materials, by weight, 67-70% of corundum aggregate, 5~8% of corundum fine powder, 11-15% of aluminum-silicon alloy powder, 5~8% of activated alumina micropowder, 2~4% of carbon, 1~4% of boron-containing additive and an inorganic binder accounting for 6% of the total weight of the raw materials; the inorganic bonding agent consists of 3 percent of clay, 2 percent of pure calcium aluminate cement and 1 percent of aluminum dihydrogen phosphate;
the environment-friendly low-carbon aluminum-carbon sliding plate unburned brick improves the molding density of the sliding plate unburned brick by utilizing the plasticity of clay, and the clay generates mullite at high temperature, thereby being beneficial to improving the high-temperature performance of the sliding plate unburned brick; the low-temperature strength of the unburned brick of the sliding plate is improved by using pure calcium aluminate cement and aluminum dihydrogen phosphate;
the corundum aggregate is one or more of white corundum particles, compact corundum particles and tabular corundum particles, and the critical particle size is 3mm;
the corundum fine powder is one or more of white corundum fine powder, compact corundum fine powder and tabular corundum fine powder, and the granularity is less than 88 microns;
the alumina content in the white corundum particles or fine powder, the dense corundum particles or fine powder and the tabular corundum particles or fine powder is respectively 98-99.5 wt%, 98.5-99.5 wt% and 98.5 wt-99.5 wt%, and the critical grain diameter is 3mm;
the carbon is graphite;
the boron-containing additive is one or more of boron carbide, boron nitride and zirconium boride, and the granularity is less than 0.044mm;
the preparation method of the environment-friendly low-carbon aluminum-carbon sliding plate unburned brick comprises the following steps:
(1) Firstly, premixing various fine powders, namely uniformly stirring and stirring corundum fine powder, aluminum-silicon alloy powder, activated alumina micro powder, carbon, boron-containing additive and inorganic binder in a double-cone stirrer to prepare premixed powder;
(2) Premixing corundum aggregate, and stirring and mixing 0-3mm white corundum particles, 0-3mm compact corundum particles and 0-3mm tabular corundum particles to obtain the premixed corundum aggregate;
(3) Adding the premixed powder in the step (1) into the premixed corundum aggregate in the step (2), then adding water accounting for 6% of the total raw materials, and uniformly mixing;
(4) Pressing and molding the mixed materials under 150MPa, drying at 110-200 ℃, drilling, drying at 100-120 ℃ to remove water in the drilled hole, and then grinding, hooping, adhering a shell and coating to prepare the environment-friendly low-carbon aluminum-carbon unburned sliding brick;
the apparent porosity of the obtained product is 5.0% or 5.4%, the normal temperature compressive strength is 130MPa or 135MPa, the medium temperature strength at 600 ℃ reaches 12.0MPa, and the high temperature flexural strength is 45MPa or 48MPa.
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