CN100494119C - Alumina-silicon carbide-carbon refractory material preparation method - Google Patents
Alumina-silicon carbide-carbon refractory material preparation method Download PDFInfo
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- CN100494119C CN100494119C CNB200510028583XA CN200510028583A CN100494119C CN 100494119 C CN100494119 C CN 100494119C CN B200510028583X A CNB200510028583X A CN B200510028583XA CN 200510028583 A CN200510028583 A CN 200510028583A CN 100494119 C CN100494119 C CN 100494119C
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- Prior art keywords
- aluminum oxide
- silicon carbide
- reclaimed materials
- manufacture method
- cent
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- 239000011819 refractory material Substances 0.000 title claims description 35
- 229910052799 carbon Inorganic materials 0.000 title claims description 27
- 229910052710 silicon Inorganic materials 0.000 title description 2
- 239000010703 silicon Substances 0.000 title description 2
- 238000002360 preparation method Methods 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 58
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 15
- 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
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 14
- 239000010431 corundum Substances 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000010439 graphite Substances 0.000 claims abstract description 8
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 8
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 31
- YAIQCYZCSGLAAN-UHFFFAOYSA-N [Si+4].[O-2].[Al+3] Chemical compound [Si+4].[O-2].[Al+3] YAIQCYZCSGLAAN-UHFFFAOYSA-N 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 3
- 238000009998 heat setting Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 239000011449 brick Substances 0.000 abstract description 10
- 239000002699 waste material Substances 0.000 abstract 2
- 229910003465 moissanite Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000002203 pretreatment Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000003245 working effect Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 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 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
Abstract
The refractory Al-SiC-C material includes alumina, SiC and graphite on the carrier of bauxite, brown corundum or white corundum, and features that recovered, crushed and depurated waste furnace lining or inner container is used to replace partial bauxite, brown corundum or white corundum. The reused material results in alumina content accounting for not more than 30 %, and has grain size below 8 mm and water content not more than 0.5 %. The present invention solves the technological problem of utilizing waste Al-SiC-C brick to replace new material without affecting the furnace life.
Description
Technical field:
The invention relates to the refractory materials that the hot metal pretreatment smelting vessel is used, especially a kind of method of utilizing depleted aluminum oxide-silicon carbide--carbon brick to make aluminum oxide-silicon carbide-carbon refractories.
Background technology:
Be pureization that realize steel-making, advanced and reduce cost, steel mill adopts the hot metal pretreatment method, is about to molten iron and carried out pre-treatment such as desiliconization, dephosphorization and desulfurization before blast furnace is delivered to steel melting furnace.The inner lining refractory of the employed container of pre-treatment (as metal mixer car, hot metal ladle, torpedo jar) must be considered the caused erosion of above-mentioned pre-treatment.The green brick of aluminium-silicon carbide-carbon refractory material manufacturing is a kind of good refractory materials with its good chemical resistance of concrete, heat-shock resistance, anti-mechanical erosion and wear resistance, used leck brick and mullite brick before it has replaced, it is mainly by the Al that accounts for weight percent about 60～75%
2O
3(being specially alumina, brown corundum, sub-white corundum), about 5～20% silicon carbide, about 6～18% graphite mixes into pug with a small amount of wedding agent through stirring, by the thermal treatment of 200 ℃ of left and right sides temperature, makes its solidifying and setting become brick at last.In use owing to be subjected to the melting loss of pyritous molten iron for a long time, the chemical erosion of mechanical erosion and slag has certain work-ing life to this aluminum oxide-silicon carbide-carbon refractories, also is so-called furnace life.After arriving furnace life, processing vessel needs repairing, and the old liner under removing goes out of use, and if things go on like this, pile up like a mountain for these depleted refractory materialss, both took up an area of, and can produce environmental pollution again, and it is big burdensome to become iron and steel enterprise one.Refractory factory raises up for cost of material, production cost again on the other hand, opposite product sale price pressed down to fall again because of disturbing.Can utilize the depleted aluminum oxide one by one the silicon carbide-carbon brick substitute a part of virgin material and become a problem that need are to be researched and solved.
Summary of the invention:
The invention provides the manufacture method of a kind of aluminum oxide-silicon carbide-carbon refractories, how the manufacture method of described this aluminum oxide-silicon carbide-carbon refractories utilizes depleted aluminum oxide-silicon carbide--carbon brick to substitute the part virgin material if having solved, and keep the technical problem in original work-ing life.
The manufacture method of a kind of aluminum oxide-silicon carbide-carbon refractories, use depleted furnace lining or inner bag, earlier with pulverizer or manually pulverize, and general's Impurity removal wherein, carry out drying again, be dried to water ratio≤0.5%, the granular size of reclaimed materials is between 8～0mm, standby by the granular size classification at last as reclaimed materials, the add-on of reclaimed materials is calculated the per-cent 15-30% that accounts for this refractory materials total oxidation aluminium content with its contained aluminum oxide, with reclaimed materials, the aluminum oxide virgin material, same silicon carbide, carbon enters stirrer together with wedding agent and mixes into the pug that even moulding is used after weighing, wherein to account for the weight percent of pug be 60～75% to aluminum oxide, the weight percent that silicon carbide accounts for pug is 5～20%, the weight percent that graphite accounts for pug is 6～18%, a small amount of is wedding agent, under 200 ℃ temperature condition, carry out thermofixation behind this mud material forming and handle, just obtain to have aluminum oxide-silicon carbide--carbon refractories that intensity should be arranged.
Further, this reclaimed materials should be removed ferruginous impurity.
Further, when this aluminum oxide virgin material was main body to contain brown corundum, it was 15～25% that the add-on of reclaimed materials is calculated the per-cent that accounts for this refractory materials total oxidation aluminium content with its contained aluminum oxide.
Further, when this aluminum oxide virgin material is main with the high grade bauxite that contains 80～86% aluminum oxide, it is 20～30% that the add-on of reclaimed materials is calculated the per-cent that accounts for this refractory materials total oxidation aluminium content with its contained aluminum oxide.
Further, in the alumina supporter that aluminum oxide virgin material and reclaimed materials are formed, the per-cent of the weight of its granular size is
5～1mm 45～65％；
1～0.5mm 15～30％；
0.5～0.08mm 4～10％；
<0.08mm 6～15％。
Advantage of the present invention is:
1, owing to reduced the input of aluminum oxide virgin material, used part to pulverize the reclaimed materials that screens behind de-iron and other impurity, reduced the manufacturing expense of refractory materials, thereby be that the cost that reduces ironmaking, steel contributes by laying-in in the depleted.
2, comparing of its work-ing life and whole use virgin materials, not only do not reduce, also slightly improve, all there is prolongation the turnaround in the special this game.
3, make the depleted refractory materials obtain the approach that utilizes again, saved mine resources, help soil-water protection.
4, solve the difficult problem that the steel-making enterprise rejected material is stacked, save a large amount of stacking places, eliminated many predicaments that environmental pollution brings again.
Embodiment:
The present invention removes by existing aluminum oxide-silicon carbide--carbon refractories manufacturing technology and prepares new aluminum oxide (Al
2O
3), outside silicon carbide and the graphite raw material, also should be with molten steel pretreatmenting container depleted inner lining refractory earlier with pulverizer or manually pulverize: and impurity that will be wherein, the composition that particularly is stained with irony is removed, and the method for removal is pickling and washing, and manually picks up or magnetic.Carry out drying (typical temperature is under 100 ℃ of conditions) again to water ratio≤0.5%, press at last particle 8～5mm, 5～1mm, 1～0.5mm, 0.5～0.08mm and＜size fractionation of 0.08mm is standby as reclaimed materials, measure wherein 5～1mm, 1～0.5mm, 0.5～0.08mm and＜basis when each grade particles ratio of 0.08mm is prepared burden as reworked material.In the above-mentioned novel material, normally used for containing the high grade bauxite of 86～88% aluminum oxide or containing the brown corundum of 95% left and right sides aluminum oxide or contain the sub-white corundum of 98% left and right sides aluminum oxide as the carrier of aluminum oxide, graphite uses crystalline flake graphite to be the master as the carrier of carbon.
Refractory materials of the present invention is the same with prior art by the weight percent of its chemical ingredients, it is mainly by the Al2O3 that accounts for weight percent about 60～75% (being specially alumina, brown corundum, sub-white corundum), silicon carbide about 5～20%, graphite about 6～18% mixes into pug with a small amount of wedding agent through stirring, by the thermal treatment of 200 ℃ of left and right sides temperature, make its solidifying and setting become brick at last.As present common use utilize special asphalt solid binder that depleted producer gas generator semi coking tar makes as raw material, resol etc., specifically decide by the position of refractory materials in stove or in the hot metal ladle.
The present invention substitutes new alumina raw material with partially recycled material, and its add-on is calculated with the whole alumina contents of alumina content＜30% refractory materials that is had in the reclaimed materials.Specifically be used for the position of various molten steel pretreatmenting containers and the main kind of virgin material carrier of aluminum oxide is decided on refractory materials of the present invention, generally be positioned at the refractory materials at container slag line place, because long period of soaking is in slag and molten iron, standing the secular chemical erosion of slag damages easily, its reclaimed materials consumption can suitably reduce, be used for the iron wire brick then the reclaimed materials consumption can suitably increase.When aluminum oxide virgin material when being main with brown corundum, the reclaimed materials add-on accounts for 15～25% of whole alumina contents and is advisable, and when virgin material when being main with high grade bauxite, the reclaimed materials add-on accounts for 20～30% of whole alumina contents and is advisable.
The present invention should keep its granular size to have suitable proportioning add reclaimed materials in the aluminum oxide virgin material after:
5～1mm particle accounts for 45～65%; 1～0.5mm particle accounts for 15～30%;
0.5～0.08mm particle accounts for 4～10%;＜0.08mm particle accounts for 6～15%.
Above-mentioned aluminum oxide virgin material, reclaimed materials are entered the mixing pug that becomes even plastic usefulness of stirrer together with silicon carbide, carbon and wedding agent after weighing, carrying out thermofixation behind this mud material forming under 200 ℃ temperature condition handles, just obtain to have the aluminium-silicon carbide-carbon refractory material that intensity should be arranged, its work-ing life is not second to the aluminum oxide-silicon carbide--carbon refractories of whole use virgin materials.
Claims (7)
1. the manufacture method of aluminum oxide-silicon carbide-carbon refractories, it is characterized in that: use depleted furnace lining or inner bag, earlier with pulverizer or manually pulverize, and general's Impurity removal wherein, carry out drying again, be dried to water ratio≤0.5%, the granular size of reclaimed materials is between 8～0mm, standby by the granular size classification at last as reclaimed materials, the add-on of reclaimed materials is calculated the per-cent 15-30% that accounts for this refractory materials total oxidation aluminium content with its contained aluminum oxide, with reclaimed materials, the aluminum oxide virgin material, same silicon carbide, carbon enters stirrer together with wedding agent and mixes into the pug that even moulding is used after weighing, wherein to account for the weight percent of pug be 60～75% to aluminum oxide, the weight percent that silicon carbide accounts for pug is 5～20%, the weight percent that graphite accounts for pug is 6～18%, a small amount of is wedding agent, under 200 ℃ temperature condition, carry out thermofixation behind this mud material forming and handle, just obtain to have aluminum oxide-silicon carbide--carbon refractories that intensity should be arranged.
2. the manufacture method of aluminum oxide-silicon carbide according to claim 1-carbon refractories is characterized in that: this reclaimed materials should be removed ferruginous impurity.
3. the manufacture method of aluminum oxide-silicon carbide according to claim 1 and 2-carbon refractories, it is characterized in that: when this aluminum oxide virgin material was main body to contain brown corundum, it was 15～25% that the add-on of reclaimed materials is calculated the per-cent that accounts for this refractory materials total oxidation aluminium content with its contained aluminum oxide.
4. the manufacture method of aluminum oxide-silicon carbide according to claim 1 and 2-carbon refractories, it is characterized in that: when this aluminum oxide virgin material was main with the high grade bauxite that contains 80～86% aluminum oxide, it was 20～30% that the add-on of reclaimed materials is calculated the per-cent that accounts for this refractory materials total oxidation aluminium content with its contained aluminum oxide.
5. the manufacture method of aluminum oxide-silicon carbide according to claim 1 and 2-carbon refractories is characterized in that: in the alumina supporter that aluminum oxide virgin material and reclaimed materials are formed, the per-cent of the weight of its granular size is
5～1mm 45～65％；
1～0.5mm 15～30％；
5～0.08mm 4～10％；
<0.08mm 6～15％。
6. the manufacture method of aluminum oxide-silicon carbide according to claim 3-carbon refractories is characterized in that: in the alumina supporter that aluminum oxide virgin material and reclaimed materials are formed, the per-cent of the weight of its granular size is
5～1mm 45～65％；
1～0.5mm 15～30％；
5～0.08mm 4～10％；
<0.08mm 6～15％。
7. the manufacture method of aluminum oxide-silicon carbide according to claim 4-carbon refractories is characterized in that: in the alumina supporter that aluminum oxide virgin material and reclaimed materials are formed, the per-cent of the weight of its granular size is
5～1mm 45～65％；
1～0.5mm 15～30％；
5～0.08mm 4～10％；
<0.08mm 6～15％。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510028583XA CN100494119C (en) | 2005-08-08 | 2005-08-08 | Alumina-silicon carbide-carbon refractory material preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510028583XA CN100494119C (en) | 2005-08-08 | 2005-08-08 | Alumina-silicon carbide-carbon refractory material preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1911863A CN1911863A (en) | 2007-02-14 |
| CN100494119C true CN100494119C (en) | 2009-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510028583XA Expired - Fee Related CN100494119C (en) | 2005-08-08 | 2005-08-08 | Alumina-silicon carbide-carbon refractory material preparation method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921129B (en) * | 2010-09-08 | 2012-11-14 | 武汉钢铁(集团)公司 | Paint applied to pelletizing rotary kiln for preventing dust bonding |
| CN103888028B (en) * | 2014-03-21 | 2015-12-09 | 成都航天烽火精密机电有限公司 | High Efficiency Thermal difference power generating stove |
| CN107915417A (en) * | 2017-10-26 | 2018-04-17 | 深圳市铂科新材料股份有限公司 | A kind of processing method of smelting slag |
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| CN1911863A (en) | 2007-02-14 |
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Owner name: SHANGHAI SHENGJIANG SPECIAL REFRACTORY MATERIAL F Free format text: FORMER OWNER: SHANGHAI SHENGJIANG SPECIAL REFRACTORY MATERIAL FACTORY Effective date: 20070928 |
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Effective date of registration: 20070928 Address after: 201906, No. 985, Fu Lian Road, Shanghai, Baoshan District Applicant after: Shanghai Shengjiang Special Refractory Material Factory Co-applicant after: Shanghai Taihe Refratory Factory Address before: 201906, No. 985, Fu Lian Road, Shanghai, Baoshan District Applicant before: Shanghai Shengjiang Special Refractory Material Factory |
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