CN101215180A - Method for producing AZS electric melting refractory materials by natural mineral raw materials - Google Patents
Method for producing AZS electric melting refractory materials by natural mineral raw materials Download PDFInfo
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- CN101215180A CN101215180A CNA2008100490166A CN200810049016A CN101215180A CN 101215180 A CN101215180 A CN 101215180A CN A2008100490166 A CNA2008100490166 A CN A2008100490166A CN 200810049016 A CN200810049016 A CN 200810049016A CN 101215180 A CN101215180 A CN 101215180A
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Abstract
The invention discloses a method for producing AZS electrocast refractories by natural raw mineral materials, which follows the following steps that 1, according to the content of Al2O3 and SiO2 in alumina and the content of ZrO2 and SiO2 in low-grade zircon sand, uniformly mixing alumina, low-grade zircon sand, carbon material and iron chips and then adding into a three-phase furnace, proceeding submerged arc and reduction in the state of high temperature fusion to cause the content of Al2O3, ZrO2 and SiO2 in the molten liquid to reach the chemical composition standard of AZS33, AZS36 and AZS41 product, 2, pouring the molten liquid prepared in the step 1 into a second three-phase furnace, adding right amount of sodium carbonate assisting solvent and oxygen blowing and refining to remove residual carbon and low-melting point oxide in the molten liquid, 3, casting the refining qualified molten liquid from step 2 into the preformed mould, after heat preservation and cooling, obtaining the needed AZS electrocast refractories product. The invention has the advantages that the low-grade zircon sand and natural high alumina are utilized as raw materials to directly produce high grade and qualified AZS electrocast refractory material.
Description
Technical field
The present invention relates to the method for electrocast refractories, especially relate to the method for utilizing natural mineral raw to produce the AZS electrocast refractories.
Background technology
The AZS electrocast refractories is the important foundation material that is used for various glass furnaces.Along with the development of national economy and related industries, glass furnace is presented always the impetus of steady-state growth with the demand of AZS refractory materials.In the production method of known AZS electrocast refractories and disclosed patent, its raw materials for production mainly are high-purity technical aluminum oxide powder and high-grade zircon sand or highly purified desilicated zirconias.Because the reserves of China's higher-grade zircon sand are limited, most of raw material all needs to have increased the production cost of AZS refractory materials widely from external (as countries such as Australia, New Zealand, South Africa, Brazil) import.Although numerous enterprises all actively uses the recovery waste material to produce, can not fundamentally solve shortage of raw materials, the problem that cost rises significantly.There are abundant natural alumine resource and low-grade zircon sand resource in China, but directly utilizes natural alumine and low-grade zircon sand to produce the AZS electrocast refractories, yet there are no the report of all relevant this respects up till now.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing low-grade zircon sand and natural alumine to produce the AZS electrocast refractories with aluminum oxide powder and higher-grade zircon sand for the high-purity technical of raw material substitution costliness.
For achieving the above object, the present invention can take following technical proposals:
The method of utilizing natural mineral raw to produce the AZS electrocast refractories of the present invention is to carry out according to following step:
The first step is according to Al in the bauxitic clay
2O
3, SiO
2Content, the ZrO of low-grade zircon sand
2, SiO
2Content, chemical ingredients in bauxitic clay, low-grade zircon sand, carbon materials and the iron filings is joined in the three-phase furnace after mixing by a certain percentage through calculating, voltage control is at 70V-250V, and the submerged arc reduction makes unnecessary SiO in bauxitic clay and the low-grade zircon sand under high temperature fused state
2, TiO
2And impurity removal, make Al in the liquation
2O
3, ZrO
2, SiO
2Content reach the chemical ingredients standard of AZS33, AZS36, AZS41 product;
Second step, the solution of the first step preparation is poured in second three-phawse arc furnace, add an amount of yellow soda ash solubility promoter, carry out the oxygen blast refining removing residual carbon and the low melting point oxide in the liquation, and make free metal aluminium that reduction reaction generates again oxidation generate Al
2O
3The electric arc furnace voltage control is at 140V-400V, and oxygen pressure is controlled at the interior refining of scope of 0.01MPa-1.5MPa; Treat that liquation after testing evenly and when reaching standard-required, finishes refining;
The 3rd step was poured into the qualified liquation of the second step refining in the ready made casting mold, through the insulation cooling, obtained required AZS electrocast refractory product.
In described bauxitic clay, be added with and regulate chemical ingredients less than the aluminum oxide powder of 50% weight part; In described low-grade zircon sand, be added with and regulate chemical ingredients less than the higher-grade zircon sand or the desilicated zirconia of 50% weight part.
The invention has the advantages that and utilize low-grade zircon sand and natural alumine to be raw material, the AZS electrocast refractories that the direct production high-quality is qualified, this has not only reduced the production cost of electrocast refractories industry, the utilization ratio and the added value of low-grade zircon sand and natural alumine have been improved, also reduced simultaneously the energy consumption of whole industry chain, for making rational use of resources, realize that human society reduces discharging energy-conservation strategic objective and has crucial meaning.
Embodiment
The method of utilizing natural mineral raw to produce the AZS electrocast refractories of the present invention is to carry out according to following step:
One, raw material: zircon sand, alumine, graphite, iron filings;
The composition of zircon sand is: ZrO
255%; SiO
243.2%; TiO
20.4%; Fe
2O
30.75%; Surplus is an impurity;
The composition of alumine is: Al
2O
375%; SiO
218.3%; Fe
2O
31.5%; TiO
23.8%; Surplus is an impurity;
The composition of graphite is: C 98%; SiO
21.6%; Surplus is an impurity;
The composition of iron filings is: Fe 97%; SiO
22.2%; Surplus is an impurity;
Two, preparation:
A, get natural alumine 450Kg by weight, granularity is 0.5-100mm; Natural zircon sand 420Kg, granularity is 0.1-5mm; Graphite 45Kg, granularity is 2-5mm; Iron filings 25Kg, length is less than 200mm; Above-mentioned mixing of materials is even that compound is standby;
B, melting:
Progressively add and carry out the submerged arc fusing, the voltage of three-phase furnace is 70 V-250V; Treat evenly to add again in addition when compound in the stove is melted into liquid fully the iron filings of 25Kg, make remaining silicon in the solution, titanium thorough mixing and be deposited in furnace bottom; Sample examination is treated Al in the liquation then
2O
3Content 46% ± 2, ZrO
2Content equal 33% ± 1, SiO
2Content equal at 15.5% ± 1 o'clock, pour into liquation in second three-phawse arc furnace and the throw out of liquation bottom stayed in first electric arc furnace fully;
Second step added yellow soda ash 15Kg in described second three-phawse arc furnace, make that the stable water glass of generation is a glassy phase in the solution; Control electric arc furnace voltage is at 140 V-400V, secondary current is 2000A, and control be blown into oxygen pressure between 0.1-1.5MP, carry out refining more than 40 minutes with after removing carbon and low melting point oxide residual in the liquation, monitor when meeting the color and luster standard of AZS product with the mode of being stained with rod and to get final product;
The 3rd step was poured into the qualified liquation of the second step refining in the ready made casting mold, through the insulation cooling, obtained required AZS electrocast refractory product.Chemical ingredients according to the inventive method gained AZS electrocast refractory product is:
| Al 2O 3 | ZrO 2 | SiO 2 | Na 2O | Fe 2O 3 TiO 2 | Other impurity |
| 48.4％ | 33.8％ | 15.5％ | 1.26％ | 0.25％ | 0.79％ |
Claims (2)
1. method of utilizing natural mineral raw to produce the AZS electrocast refractories is characterized in that: be to carry out according to following step:
The first step is according to Al in the bauxitic clay
2O
3, SiO
2Content, the ZrO of low-grade zircon sand
2, SiO
2Content, chemical ingredients in bauxitic clay, low-grade zircon sand, carbon materials and the iron filings is joined in the three-phase furnace after mixing by a certain percentage through calculating, voltage control is at 70 V-250V, and the submerged arc reduction makes unnecessary SiO in bauxitic clay and the low-grade zircon sand under high temperature fused state
2, TiO
2And impurity removal, make Al in the liquation
2O
3, ZrO
2, SiO
2Content reach the chemical ingredients standard of AZS33, AZS36, AZS41 product;
Second step, the solution of the first step preparation is poured in second three-phawse arc furnace, carry out the oxygen blast refining removing residual carbon and the low melting point oxide in the liquation, and make free metal aluminium that reduction reaction generates again oxidation generate Al
2O
3In this course, thereby add an amount of yellow soda ash and the generation of the silicon dioxde reaction in product crystalline phase---glassy phase, to satisfy the physics requirement of AZS electrocast refractories; The electric arc furnace voltage control is at 140V-400V, and oxygen pressure is controlled at the interior refining of scope of 0.01MPa-1.5MPa; Treat that liquation after testing evenly and when reaching standard-required, finishes refining;
The 3rd step was poured into the qualified liquation of the second step refining in the ready made casting mold, through the insulation cooling, obtained required AZS electrocast refractory product.
2. the method for utilizing natural mineral raw to produce the AZS electrocast refractories according to claim 1 is characterized in that: be added with less than the aluminum oxide powder of 50% weight part in described bauxitic clay and regulate chemical ingredients; In described low-grade zircon sand, be added with and regulate chemical ingredients less than the higher-grade zircon sand or the desilicated zirconia of 50% weight part.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100490166A CN101215180B (en) | 2008-01-07 | 2008-01-07 | Method for producing AZS electric melting refractory materials by natural mineral raw materials |
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|---|---|---|---|
| CN2008100490166A CN101215180B (en) | 2008-01-07 | 2008-01-07 | Method for producing AZS electric melting refractory materials by natural mineral raw materials |
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| CN101215180A true CN101215180A (en) | 2008-07-09 |
| CN101215180B CN101215180B (en) | 2010-09-01 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344290A (en) * | 2010-06-09 | 2012-02-08 | 旭硝子陶瓷株式会社 | Light-weight refractory aggregate |
| CN102361836A (en) * | 2009-03-30 | 2012-02-22 | 黑崎播磨株式会社 | Aluminum oxycarbide composition and process for producing same |
| CN108033796A (en) * | 2017-12-08 | 2018-05-15 | 安徽雷萨重工机械有限公司 | A kind of refractory material of high-strength mechanical properties |
| CN111943698A (en) * | 2020-08-19 | 2020-11-17 | 梅河口市德成耐火材料有限公司 | Surface layer refractory material of precision casting wax mould |
| CN112110716A (en) * | 2020-09-21 | 2020-12-22 | 成都展新电熔耐火材料有限公司 | Production process of refractory material and refractory material prepared by production process |
| CN115921767A (en) * | 2022-11-30 | 2023-04-07 | 武汉纺织大学 | Investment casting shell surface layer refractory material and preparation method thereof |
| CN116727600A (en) * | 2023-06-16 | 2023-09-12 | 广东万嘉精铸材料有限公司 | Precision casting surface sand powder and preparation method thereof |
-
2008
- 2008-01-07 CN CN2008100490166A patent/CN101215180B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361836A (en) * | 2009-03-30 | 2012-02-22 | 黑崎播磨株式会社 | Aluminum oxycarbide composition and process for producing same |
| CN102361836B (en) * | 2009-03-30 | 2013-07-24 | 黑崎播磨株式会社 | Aluminum oxycarbide composition and process for producing same |
| CN102344290A (en) * | 2010-06-09 | 2012-02-08 | 旭硝子陶瓷株式会社 | Light-weight refractory aggregate |
| CN102344290B (en) * | 2010-06-09 | 2014-05-07 | 旭硝子陶瓷株式会社 | Light-weight refractory aggregate |
| CN108033796A (en) * | 2017-12-08 | 2018-05-15 | 安徽雷萨重工机械有限公司 | A kind of refractory material of high-strength mechanical properties |
| CN111943698A (en) * | 2020-08-19 | 2020-11-17 | 梅河口市德成耐火材料有限公司 | Surface layer refractory material of precision casting wax mould |
| CN111943698B (en) * | 2020-08-19 | 2021-02-19 | 梅河口市德成耐火材料有限公司 | Surface layer refractory material of precision casting wax mould |
| CN112110716A (en) * | 2020-09-21 | 2020-12-22 | 成都展新电熔耐火材料有限公司 | Production process of refractory material and refractory material prepared by production process |
| CN115921767A (en) * | 2022-11-30 | 2023-04-07 | 武汉纺织大学 | Investment casting shell surface layer refractory material and preparation method thereof |
| CN115921767B (en) * | 2022-11-30 | 2023-12-29 | 武汉纺织大学 | Investment casting shell surface layer refractory material and preparation method thereof |
| CN116727600A (en) * | 2023-06-16 | 2023-09-12 | 广东万嘉精铸材料有限公司 | Precision casting surface sand powder and preparation method thereof |
| CN116727600B (en) * | 2023-06-16 | 2024-01-26 | 广东万嘉精铸材料有限公司 | Precision casting surface sand powder and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101215180B (en) | 2010-09-01 |
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