CN101402527A - Compact aluminum silicon carbide composite material and method of manufacturing the same - Google Patents
Compact aluminum silicon carbide composite material and method of manufacturing the same Download PDFInfo
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- CN101402527A CN101402527A CNA200810197441XA CN200810197441A CN101402527A CN 101402527 A CN101402527 A CN 101402527A CN A200810197441X A CNA200810197441X A CN A200810197441XA CN 200810197441 A CN200810197441 A CN 200810197441A CN 101402527 A CN101402527 A CN 101402527A
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- carbide composite
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Abstract
The nvention relates to a dense aluminum silicon carbide composite material and a method for preparing the same. The technical proposal is as follows: according to weight percentage, firstly, mixing 50 to 80 percent of high bauxite chamotte, 0 to 30 percent of white fused alumina, 5 to 30 percent of brown alumina, 5 to 25 percent of industrial Sac, and 1 to 5 percent of active aluminium-silicon micro powders, and then adding a binding agent which is 1 to 2.5 percent of the mixture and 3 to 6 percent of water into the mixture, stirring or mixing and milling the mixture for 10 to 25 minutes, and pressing the mixture to be formed; and secondly, drying the mixture at a temperature of between 60 and 110 DEG C for 12 to 36 hours or drying the mixture naturally indoor for 24 to 48 hours, and sintering the mixture at a temperature of between 1,400 and 1,470 DEG C for 4 to 8 hours to obtain the finished products. The dense aluminum silicon carbide composite material has the advantages of high density, strong strength, infiltration and erosion resistances, high durability, excellent resistance to slag erosion and penetration and performance of molten iron erosion resistance, no pollution to environment and the like. The dense aluminum silicon carbide composite material is applicable to the fire-resistant lining of metallurgical equipment such as a blast furnace, an iron tap channel, a ladle car (torpedo tank) and a hot metal ladle, a hot metal mixer, an iron-melting furnace and the like.
Description
Technical field
The invention belongs to alumina series raw material and silicon carbide is the high temperature resistant composite technical field of basic raw material.Relate in particular to a kind of compact aluminum silicon carbide composite material and preparation method thereof.
Background technology
In the past, the liner of iron-smelting blast furnace, casting house, hot-metal ladle and carriage (torpedo jar) and smelting, storage and transport high temperature molten iron equipment such as iron ladle, hot metal mixer and cupola furnace all was with fireclay brick, high alumina brick and Al
2O
3-SiC-C is brick to be built.Along with strengthening smelting with based on the metallurgical The application of new technique such as hot metal pretreatment of desulfurization, aggravated the souring of molten iron to lining brick, the lining brick working conditions is significantly harsh.Causing clay brick, high alumina brick in use singly is not corrode gradually, the more important thing is and aggravated the destruction of slag lining brick, its reason is that slag penetration → brick internal reaction generation metamorphic layer → brick layer character deterioration causes structural layering pull out type fracture, therefore, the infiltration that prevents slag has just become subject matter.
In refractory brick, introduce the infiltration that graphite and SiC can effectively prevent slag, so Al
2O
3-SiC-C brick (the flat 1-320265 of JP, the flat 2-51474 of JP, the flat 1-528246 of JP) just is widely used.This brick has good result of use under the reducing atmosphere condition, but graphite under the high temperature air condition (C) is oxidized easily, cause loose, the loose easier top layer properties deterioration that oozes slag, makes brick of brick layer of brick body after graphite is oxidized, cause result of use bad.People have taked a lot of measures to prevent graphite oxidation, have not only increased cost, and do not solve root problem.
Domestic also have some manufacturer production and use Al
2O
3-SiC-C refractory brick, but its production method all is to make according to the production technique of traditional refractory brick, void content is bigger, and the perviousness of anti-slag and aggressiveness are good inadequately.For example " furnace mouth of torpedo vehicle refractory materials " (CN98111216.1) patented technology though described refractory materials has reduced the refractory consumption rate of torpedo tank car to a certain extent, does not solve the problem of oxidation of graphite (C), and the intensity of brick is also on the low side." aluminium chromium silicon carbide refractory brick " is patented technology (CN200410032058.0), though this refractory brick good in oxidation resistance, anti-iron, scouring are strong, are suitable for using the Gr in this brick on iron ladle, torpedo jar, hot metal mixer
2O
3Easily gasification volatilization at high temperature, harmful to human body and environment.
Summary of the invention
Task of the present invention provides a kind ofly can improve wearing quality, intensity height, void content is low, the aperture is little, microstructure is good, not dry slag, good erosion resistance and slag penetration resistance are arranged, high temperature resistance molten iron performance of flushing is good and the compact aluminum silicon carbide composite material of long service life and preparation method thereof.Made matrix material is used for iron-smelting blast furnace middle and upper part, casting house, hot metal mixer, hot metal ladle, metal mixer car jar etc.
For realizing above-mentioned task, the technical solution adopted in the present invention is: percentage composition meter by weight, earlier with 50～80% bauxite chamotte, 0～30% white fused alumina, 5～30% brown corundum, the siliceous micro mist of 5～25% industrial SiC and 1～5% active aluminum mixes, add the wedding agent of above-mentioned compound 1～2.5% and 3～6% water again, stirring or mixed grind 10～25 minutes, compression moulding; Dry or through 60～110 ℃ * 12～36 hours then through seasoning in indoor 24～48 hours, burnt till in 1400～1470 ℃ * 4～8 hours.
Wherein: the Al of bauxite chamotte
2O
3Content 〉=85%, particle diameter are 5～0mm; SiC content 〉=93% of industry SiC, particle diameter is 1～0mm; The Al of white fused alumina
2O
3Content 〉=97%, particle diameter are 1～0mm; The Al of palm fibre corundum
2O
3Content 〉=93%, particle diameter are 3～0mm; The particle diameter of the siliceous micro mist of active aluminum is≤8 μ m; Wedding agent is more than one in calcium lignin sulphonate, sodium lignosulfonate, lignosulfite powder, the industrial dextrine powder.
Because the present invention adopts industrial SiC to substitute graphite (C), does not have the problem of oxidation of graphite (C); SiC is not only very resistant to elevated temperatures material, and coefficient of thermal expansion is very low, can prevent that in use internal stress is excessive to be caused the embrittlement of lining brick and peel off owing to heating cooling repeatedly produces.Therefore, an amount of adding can be improved the performance of brick into industrial SiC.In addition, part of SiC oxidation at high temperature becomes the top layer that gaseous state SiO is moved to brick, becomes solid-state SiO with high temperature air reaction oxidation again
2, the surface pore that can clog lining brick makes the top layer densification of lining brick, stops the infiltration of slag, simultaneously, under hot conditions, the oxide compound of top layer SiC and Al
2O
3Reaction also can form layer protecting film, can stop the infiltration of air, slows down deteriorating of brick, increases the service life the wearing quality of strongthener.
Therefore, the compact aluminum silicon carbide composite material that the present invention is prepared, have that intensity is big, void content is low, the aperture is little, microstructure is good, the characteristics of dry slag not, build by laying bricks or stones at positions such as hot metal ladle, torpedo tank car, hot metal mixer, iron-smelting blast furnace liner, blast furnace iron outlet grooves, be used for smelting, store and the transportation molten iron, having that intensity height, good, the anti-molten iron scouring capability of security are strong, the infiltration and the advantages such as aggressiveness is good, anti-oxidant, long service life of high temperature resistance slag, is a kind of compact aluminum silicon carbide composite material that is applicable to high temperature liquid iron system relevant device.
Embodiment
Below in conjunction with embodiment, the present invention will be further described, is not the restriction to protection domain.
Embodiment 1
A kind of compact aluminum silicon carbide composite material and preparation method thereof, its technical scheme is: by the quality percentage composition, earlier be 50～65% with bauxite chamotte, white fused alumina is 10～20%, brown corundum is 5～15%, industry SiC be 15～25% and the siliceous micro mist of active aluminum be 1～3% to mix, add 1～2% calcium lignin sulphonate by the mixture of said ratio again and make wedding agent, add 3～5% water, stirred 10～20 minutes, compression moulding, through 60～110 ℃ * 12～24 hours dryings, burnt till in 1420～1450 ℃ * 6～8 hours then.
The Al of described bauxite chamotte
2O
3Content 〉=85%, granularity are 5～0mm; The Al of white fused alumina
2O
3Content 〉=97%, granularity are 1～0mm; The Al of palm fibre corundum
2O
3Content 〉=93%, granularity are 3～0mm; SiC content 〉=93% of industry SiC, granularity is 1～0mm; The granularity of the siliceous micro mist of active aluminum≤8 μ m.Notice during grain composition that particulate is tightly packed.
Embodiment 2
A kind of compact aluminum silicon carbide composite material and preparation method thereof, its technical scheme is: by the quality percentage composition, earlier be 70～80% with bauxite chamotte, brown corundum is 10～20%, industrial SiC be 5～15% and the siliceous micro mist of active aluminum be 2～4% to mix, add 1～2% sodium lignosulfonate by the mixture of said ratio again and make wedding agent, added 4～6% water mixed grind 15～25 minutes, compression moulding, through 60～110 ℃ * 24～36 hours dryings, burnt till in 1450～1470 ℃ * 4～6 hours then.
The physico-chemical property of described raw material and granularity are with example 1.
Embodiment 3
A kind of compact aluminum silicon carbide composite material and preparation method thereof, its technical scheme is: by the quality percentage composition, earlier be 50～65% with bauxite chamotte, white fused alumina is 20～30%, brown corundum is 5～15%, industrial SiC be 5～15% and the siliceous micro mist of active aluminum be 1～3% to mix.
Add 0.5～1% industrial dextrine powder by the mixture of said ratio again and 0.5～1.5% sodium lignosulfonate mixture is made wedding agent, add 4～6% water, mixed grind 15～25 minutes, compression moulding, through seasoning in indoor 24～48 hours, burnt till in 1440～1460 ℃ * 5～7 hours then.
The physico-chemical property of described raw material and granularity are with example 1.
Embodiment 4
A kind of compact aluminum silicon carbide composite material and preparation method thereof, its technical scheme is: by the quality percentage composition, earlier be 50～60% with bauxite chamotte, white fused alumina is 5～15%, brown corundum is 20～30%, industrial SiC be 10～20% and the siliceous micro mist of active aluminum be 3～5% to mix, add 1.5～2% lignosulfite powder by the mixture of said ratio again and make wedding agent, add 3.5～5.5% water, stir compression moulding after 10～20 minutes, through 60～110 ℃ * 12～24 hours dryings, burnt till in 1400～1440 ℃ * 6～8 hours then.
The physico-chemical property of described raw material and granularity are with example 1.
Embodiment 5
A kind of compact aluminum silicon carbide composite material and preparation method thereof, its technical scheme is: by the quality percentage composition, earlier be 55～70% with bauxite chamotte, white fused alumina is 5～15%, brown corundum is 5～15%, industrial SiC be 15～25% and the siliceous micro mist of active aluminum be 2～4% to mix, add 1.5～2.5% industrial dextrine powder by the mixture of said ratio again and make wedding agent, added 4～6% water mixed grind 10～20 minutes, compression moulding, through 60～110 ℃ * 24～36 hours dryings, burnt till in 1430～1450 ℃ * 5～7 hours then.
The physico-chemical property of described raw material and granularity are with example 1.
Embodiment 6
A kind of compact aluminum silicon carbide composite material and preparation method thereof, its technical scheme is: by the quality percentage composition, be 60～75% with bauxite chamotte earlier, white fused alumina is 10～20%, the palm fibre corundum is 5～15%, industry SiC be 5～15% and the siliceous micro mist of active aluminum be 1～3% to mix, add 0.5～1% calcium lignin sulphonate by the mixture of said ratio again and 0.5～1.5% sodium lignosulfonate mixture is made wedding agent, adding 4～5.5% water stirred 15～25 minutes, compression moulding, through seasoning in indoor 24～48 hours, burnt till in 1440～1460 ℃ * 5～7 hours then.
The physico-chemical property of described raw material and granularity are with example 1.
Because this embodiment mainly adopts industrial SiC to substitute graphite (C), does not have the problem of oxidation of graphite (C); SiC is not only very resistant to elevated temperatures material, and coefficient of thermal expansion is very low, can prevent that in use internal stress is excessive to be caused the embrittlement of lining brick and peel off owing to heating cooling repeatedly produces.Therefore, an amount of adding can be improved the performance of brick into industrial SiC.In addition, part of SiC oxidation at high temperature becomes the top layer that gaseous state SiO is moved to brick, becomes solid-state SiO with high temperature air reaction oxidation again
2, the surface pore that can clog lining brick makes the top layer densification of lining brick, stops the infiltration of slag, simultaneously, under hot conditions, the oxide compound of top layer SiC and Al
2O
3Reaction also can form layer protecting film, can stop the infiltration of air, slows down deteriorating of brick, increases the service life the wearing quality of strongthener.
The compact aluminum silicon carbide composite material that this embodiment is prepared, have that intensity is big, void content is low, the aperture is little, microstructure is good, the characteristics of dry slag not, build by laying bricks or stones at positions such as hot metal ladle, torpedo tank car, hot metal mixer, iron-smelting blast furnace liner, blast furnace iron outlet grooves, be used for smelting, store and the transportation molten iron, having that intensity height, good, the anti-molten iron scouring capability of security are strong, the infiltration and the advantages such as aggressiveness is good, anti-oxidant, long service life of high temperature resistance slag, is a kind of density fireproof lining brick that is applicable to high temperature liquid iron system relevant device.
Claims (8)
1, a kind of preparation method of compact aluminum silicon carbide composite material, it is characterized in that percentage composition meter by weight, earlier 50～80% bauxite chamotte, 0～30% white fused alumina, 5～30% brown corundum, 5～25% industrial SiC and 1～5% the siliceous micro mist of active aluminum are mixed, add the wedding agent of above-mentioned compound 1～2.5% and 3～6% water again, stirring or mixed grind 10～25 minutes, compression moulding; Dry or through 60～110 ℃ * 12～36 hours then through seasoning in indoor 24～48 hours, burnt till in 1400～1470 ℃ * 4～8 hours.
2, the preparation method of compact aluminum silicon carbide composite material according to claim 1 is characterized in that the Al of described bauxite chamotte
2O
3Content 〉=85%, particle diameter are 5～0mm.
3, the preparation method of compact aluminum silicon carbide composite material according to claim 1 is characterized in that SiC content 〉=93% of described industrial SiC, and particle diameter is 1～0mm.
4, the preparation method of compact aluminum silicon carbide composite material according to claim 1 is characterized in that the Al of described white fused alumina
2O
3Content 〉=97%, particle diameter are 1～0mm.
5, the preparation method of compact aluminum silicon carbide composite material according to claim 1 is characterized in that the Al of described brown corundum
2O
3Content 〉=93%, particle diameter are 3～0mm.
6, the preparation method of compact aluminum silicon carbide composite material according to claim 1 is characterized in that the particle diameter of the siliceous micro mist of described active aluminum is≤8 μ m.
7, the preparation method of compact aluminum silicon carbide composite material according to claim 1 is characterized in that described wedding agent is more than one in calcium lignin sulphonate, sodium lignosulfonate, lignosulfite powder, the industrial dextrine powder.
8, according to the prepared compact aluminum silicon carbide composite material of preparation method of each described compact aluminum silicon carbide composite material in the claim 1～7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810197441XA CN101402527A (en) | 2008-10-30 | 2008-10-30 | Compact aluminum silicon carbide composite material and method of manufacturing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810197441XA CN101402527A (en) | 2008-10-30 | 2008-10-30 | Compact aluminum silicon carbide composite material and method of manufacturing the same |
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| CN101402527A true CN101402527A (en) | 2009-04-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838363A (en) * | 2012-09-21 | 2012-12-26 | 无锡兴达节能科技股份有限公司 | Aluminum carbon brick and preparation method thereof |
| CN102851422A (en) * | 2012-07-05 | 2013-01-02 | 河北省首钢迁安钢铁有限责任公司 | Blast furnace tuyere combination firebrick repairing method |
| CN105436492A (en) * | 2015-12-26 | 2016-03-30 | 山东钢铁股份有限公司 | Reworked material working lining of continuous casting tundish and preparation method for reworked material working lining |
| CN115057693A (en) * | 2022-08-18 | 2022-09-16 | 北京利尔高温材料股份有限公司 | Tundish high-aluminum working lining dry material, working lining and preparation method thereof |
-
2008
- 2008-10-30 CN CNA200810197441XA patent/CN101402527A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851422A (en) * | 2012-07-05 | 2013-01-02 | 河北省首钢迁安钢铁有限责任公司 | Blast furnace tuyere combination firebrick repairing method |
| CN102838363A (en) * | 2012-09-21 | 2012-12-26 | 无锡兴达节能科技股份有限公司 | Aluminum carbon brick and preparation method thereof |
| CN105436492A (en) * | 2015-12-26 | 2016-03-30 | 山东钢铁股份有限公司 | Reworked material working lining of continuous casting tundish and preparation method for reworked material working lining |
| CN105436492B (en) * | 2015-12-26 | 2017-11-28 | 山东钢铁股份有限公司 | A kind of continuous casting production reworked material working lining and preparation method thereof |
| CN115057693A (en) * | 2022-08-18 | 2022-09-16 | 北京利尔高温材料股份有限公司 | Tundish high-aluminum working lining dry material, working lining and preparation method thereof |
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Open date: 20090408 |