CN1109035A - Method for increasing finished product rate of fusion-cast alpha-beta aluminum oxide bricks - Google Patents
Method for increasing finished product rate of fusion-cast alpha-beta aluminum oxide bricks Download PDFInfo
- Publication number
- CN1109035A CN1109035A CN 94119494 CN94119494A CN1109035A CN 1109035 A CN1109035 A CN 1109035A CN 94119494 CN94119494 CN 94119494 CN 94119494 A CN94119494 A CN 94119494A CN 1109035 A CN1109035 A CN 1109035A
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- China
- Prior art keywords
- fusion
- brick
- alpha
- beta
- aluminum oxide
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- Compositions Of Oxide Ceramics (AREA)
Abstract
The method for production of fusion-cast alpha-beta alumine bricks features use of high-purity raw materials, reasonable proportioning of row materials, liner brack made of the same material, and improvement in fusion in eleotric furnace, casting and annealing, resulting in high quality and finished rate of products.
Description
The present invention relates to a kind of improvement of fused cast alpha-beta alumina brick production method, and present technique is to belong to the castable refractory field.Product is mainly used in float glass smelting kiln runner, chute and cooling end.
The fused cast alpha-beta alumina brick is to be main raw material with the commercial alumina powder, a kind of senior castable refractory that makes after weighing batching, electric furnace long arc oxidation founding, cast molding, high temperature annealing and cold working.This products characteristics does not have Fe
2O
3, TiO
2Deng detrimental impurity, do not pollute glass metal, no bubble is separated out, in anti-glass metal erosion performance excellence below 1350 ℃.
Prior art is a main raw material with the commercial alumina powder all both at home and abroad, adds a certain amount of soda ash again and prepares admixtion; Also all adopt long arc oxidation style founding, but mould making process adopts graphite and metal pattern abroad, Shenyang Refractory Material Factory (being called for short Shen Naichang) adopts the sand mo(u)ld model; Annealing process is external to adopt box natural thermal insulation to anneal, and the anti-factory in Shen adopts the annealing of fuel oil tunnel furnace; Cold working all adopts diamond to mill rattler to the casted article milling both at home and abroad.
The object of the invention: the yield rate and the quality product that improve the fused cast alpha-beta alumina brick.
Feature of the present invention:
(1) strict control raw material impurity composition, it is main raw material that the present invention selects the α-A type of high-temperature calcination and γ-A type commercial alumina powder for use;
(2) electric furnace brick graphite brick in the prior art, the present invention effects a radical cure the pollution of lining brick to glass melt, adopts and expects lining brick, promptly does electric furnace brick with alpha-beta aluminum oxide brick;
(3) reset the admixtion proportioning, its chemical constitution is:
Sio
20.5-1.0%
Na
2O 3.5-4.0%
Al
2O
3＞93.5%
All the other compositions are surplus.
(4) in the eaf process:
Upgraded transformer capacity, adopt 1250KVA, the secondary voltage maximum is 260V, Controlling System adopt have carry, the no-load automatic Regulation, to strengthen electric furnace long arc oxidation fusion technology and to guarantee its stability, and refining time was brought up to 40-50 minute by original 30 minutes, to reduce the carburizing amount of melt;
(5) casting system is adjusted into per 3 hours casting one stoves (500kg), and pouring temperature is controlled at more than 1900 ℃, further guarantees melt quality;
(6) to go into the kiln annealing temperature be 1350-1450 ℃ to casted article, and the kiln discharge temperature is below 80 ℃, and casted article working time in annealing furnace is 6-7 days.Therefore, casted article is slowly cooling at high temperature, and thermal stresses is eliminated gradually, has guaranteed α-Al
2O
3And β-Al
2O
3The formation of crystal formation and growth have finally guaranteed quality product.
Advantage of the present invention and effect:
1. behind enforcement the present invention, the cost rate of product brings up to 60% by 25%, but and continuous batch production, can provide 500 every year surplus ton fused cast alpha-beta alumina brick;
2. be that country saves 2,500,000 dollars of foreign exchanges, and played certain pushing effect for China's float glass industrial development;
3. improved quality product, its physicochemical property is as follows:
The Chemical Composition of RA-M:
Unit weight: 〉=3.0g/cm
Physicals:
Anti-glass metal corrodes (1350 ℃, 48 hours) 0.144mm/24h
Bubble eduction rate: 0
Volume density: 〉=3.3g/cm
3
Glassy phase oozes out temperature:＞1500 ℃
Embodiment:
The present invention is used for Shen Naichang in September, 94, in early September, 94 produced 20 surplus ton finished bricks, be used for the shake cooling segment of 430 tons of float glass process melting furnaces of magnificent glasswork of Henan, produce a desired effect, be that country saves 100,000 dollars of foreign exchanges.
Claims (1)
1, a kind of production method of fused cast alpha-beta alumina brick is characterized in that:
(1) selecting high-temperature calcination α-A type and γ-A type commercial alumina powder for use is main raw material;
(2) chemical constitution of admixtion proportioning is:
SiO
20.5-1.0%
Na
2O 3.5-4.0%
Al
2O
3＞93.5%
All the other compositions are surplus.
(3) adopting alpha-beta aluminum oxide brick is electric furnace brick;
(4) eaf process:
Adopt the 1250KVA transformer, the secondary voltage maximum is 260V; Controlling System adopt have carry, the no-load automatic Regulation; Refining time is 40-50 minute;
(5) casting system: casting 500kg was a stove in per 3 hours, and pouring temperature is controlled at more than 1900 ℃;
(6) to go into the kiln annealing temperature be 1350-1450 ℃ to casted article, and the kiln discharge temperature is below 80 ℃, and the annealing cycle is 6-7 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119494A CN1067359C (en) | 1994-12-22 | 1994-12-22 | Method for increasing finished product rate of fusion-cast alpha-beta aluminum oxide bricks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119494A CN1067359C (en) | 1994-12-22 | 1994-12-22 | Method for increasing finished product rate of fusion-cast alpha-beta aluminum oxide bricks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1109035A true CN1109035A (en) | 1995-09-27 |
| CN1067359C CN1067359C (en) | 2001-06-20 |
Family
ID=5039263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94119494A Expired - Fee Related CN1067359C (en) | 1994-12-22 | 1994-12-22 | Method for increasing finished product rate of fusion-cast alpha-beta aluminum oxide bricks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1067359C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891369A (en) * | 2010-08-03 | 2010-11-24 | 瑞泰科技股份有限公司 | Fused cast alpha-beta alumina cylindrical brick and production method thereof |
| CN101367665B (en) * | 2008-09-28 | 2010-12-08 | 瑞泰科技股份有限公司 | Sintered alpha-beta aluminum oxide brick |
| CN101367663B (en) * | 2008-09-28 | 2011-08-31 | 瑞泰科技股份有限公司 | Melt-out recombined composite aluminum oxide refractory materials |
| CN102241520A (en) * | 2010-05-13 | 2011-11-16 | 郑州振中电熔锆业有限公司 | Method for melting and casting alpha alumina product |
| CN105016754A (en) * | 2015-08-07 | 2015-11-04 | 山东嘉腾实业有限公司 | Preparation method of Al-99C dense alumina product special for glass supply channel |
| CN112225543A (en) * | 2020-10-12 | 2021-01-15 | 郑州方铭高温陶瓷新材料有限公司 | Fusion-cast formed cylindrical ceramic tile applied to glass kiln regenerator and preparation method thereof |
| CN117923886A (en) * | 2024-03-21 | 2024-04-26 | 淄博艾杰旭刚玉材料有限公司 | Corrosion-resistant alpha-beta alumina fused cast brick and preparation method thereof |
-
1994
- 1994-12-22 CN CN94119494A patent/CN1067359C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367665B (en) * | 2008-09-28 | 2010-12-08 | 瑞泰科技股份有限公司 | Sintered alpha-beta aluminum oxide brick |
| CN101367663B (en) * | 2008-09-28 | 2011-08-31 | 瑞泰科技股份有限公司 | Melt-out recombined composite aluminum oxide refractory materials |
| CN102241520A (en) * | 2010-05-13 | 2011-11-16 | 郑州振中电熔锆业有限公司 | Method for melting and casting alpha alumina product |
| CN102241520B (en) * | 2010-05-13 | 2013-06-12 | 郑州振中电熔新材料有限公司 | Method for melting and casting alpha alumina product |
| CN101891369A (en) * | 2010-08-03 | 2010-11-24 | 瑞泰科技股份有限公司 | Fused cast alpha-beta alumina cylindrical brick and production method thereof |
| CN101891369B (en) * | 2010-08-03 | 2012-04-18 | 瑞泰科技股份有限公司 | Fused cast alpha-beta alumina cylindrical brick and production method thereof |
| CN105016754A (en) * | 2015-08-07 | 2015-11-04 | 山东嘉腾实业有限公司 | Preparation method of Al-99C dense alumina product special for glass supply channel |
| CN112225543A (en) * | 2020-10-12 | 2021-01-15 | 郑州方铭高温陶瓷新材料有限公司 | Fusion-cast formed cylindrical ceramic tile applied to glass kiln regenerator and preparation method thereof |
| CN117923886A (en) * | 2024-03-21 | 2024-04-26 | 淄博艾杰旭刚玉材料有限公司 | Corrosion-resistant alpha-beta alumina fused cast brick and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1067359C (en) | 2001-06-20 |
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