CN102659421A - Production method of mullite cast steel brick - Google Patents
Production method of mullite cast steel brick Download PDFInfo
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- CN102659421A CN102659421A CN2012100928393A CN201210092839A CN102659421A CN 102659421 A CN102659421 A CN 102659421A CN 2012100928393 A CN2012100928393 A CN 2012100928393A CN 201210092839 A CN201210092839 A CN 201210092839A CN 102659421 A CN102659421 A CN 102659421A
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Abstract
The invention discloses a production method of a mullite cast steel brick. The production method comprises the following steps of raw material crushing, pug preparation, molding, drying, calcination, examination, warehousing and output from a factory. The production method of the mullite cast steel brick combines technical characteristics of cast steel brick production, utilizes high quality bauxite as a main raw material, introduces a small amount of mullite, alumina and kaolin into a brick blank matrix, utilizes reaction conversion of a brick blank into mullite and corundum in calcination, adopts easily available raw materials and reasonable auxiliary processes and has a low production cost. The mullite cast steel brick obtained by the production method has high content of corundum and mullite, contains less low-melting point phases and has strong erosion resistance and good thermal shock stability.
Description
Technical field
The present invention relates to the working method that a kind of mullite waters the steel brick.
Background technology
Existing steel-making die casting is produced and is generally adopted clay matter to water the steel brick with watering the steel brick, former refractory materials national standard YB/T5109-1993 indication also be that clay casting brick is serial.But along with the progress of steel-smelting technology, popularizing of continuous casting ingot production method adopts the working method of die casting to descend significantly, and clay matter is watered the steel brick and also seldom used.
The production of Special Alloy Steel is mostly still used the die casting production model at present because the smelting technology complicacy yields poorly and involves great expense.The quality requirements of Special Alloy Steel is high; And that former clay matter is watered steel brick corrosion-resistant property is very poor, be prone to cause Alloy Cast Steel spare to be mingled with and scrap, so special steel enterprise; Erosion resistance to strengthening refractory materials is very urgent, is badly in need of the high-grade steel brick that waters and reduces being mingled with of special steel.Common high alumina matter is watered the steel brick; Domestic also have a fire-resistant enterprise production; And the thermal shock resistance that common high alumina matter is watered the steel brick is poor, and corrosion-resistant property can not satisfy the requirement that Special Alloy Steel is produced fully, does not also have high alumina matter to water the steel brick at present or mullite waters steel brick technology and industry national standard.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of mullite to water the working method of steel brick to the problem that exists in the prior art; Its objective is that being applied to the Special Alloy Steel die casting produces, and helps stablizing the quality product that the Special Alloy Steel die casting is produced and improved steel alloy.
Technical scheme of the present invention is that the working method that this kind mullite waters the steel brick comprises:
1) the broken grinding and processing of raw material: selected alumina is chosen through artificial; Material piece surface does not have brown " irony layer " or sintering " calcareous molten knurl "; Wherein a part of selected alumina is sent into feed bin through the particulate material that disintegrating apparatus and screening plant are processed into 0mm-1mm and 1mm-3mm, and the selected alumina of another part passes through disintegrating apparatus and fine grinding equipment and screening plant and is processed into 200 order fine powder materials and sends into feed bin; The excellent clay of spy is processed into fine powder;
2) pug preparation: selected alumina, mullite, aluminum oxide and special excellent clay are prepared according to certain ratio of components; Pug preparation and mixed order of addition(of ingredients) of grinding do; Add particulate material earlier, add wedding agent then, add fine powder material at last; The pug that mixes after grinding mustn't have walk and " white material ", and the granularity of pug and moisture will reach processing requirement;
3) moulding and drying: according to the requirement of user's drawing brick shape; Design the compacting steel mould, with pressing machine pug is pressed into adobe, the apparent porosity of adobe is controlled in the 20%-25% scope; Adobe pushes 80 ℃ of-150 ℃ of tunnel dryers; Dry 24 hours, quality inspection personnel carried out the inspection of semifinished product by the drawing dimensional requirement, and qualified adobe is loaded onto kiln car and prepared to burn till;
4) burn till: adopt the tunnel like calcining kiln that adobe is burnt till, firing temperature is controlled at 1350 ℃--and 1400 ℃, soaking time was controlled at 5-8 hour;
(5) check: test according to user's brick shape figure paper size and appearance requirement block-by-block, inspect by random samples by batch physical and chemical index that mullite is watered the steel brick.
The technical qualification of described selected alumina are Al
2O
3Content is 80%-85%, Fe
2O
3≤1.5%, TiO
2≤4.0%, refractoriness>=1800 ℃, body is close>=2.9g/cm
3, water-intake rate≤4%.
The excellent clay of described spy is a kaolin, and its technical qualification are Al
2O
3Content is 30%-25%, Fe
2O
3≤1.2%, refractoriness>=1660 ℃.
The technical qualification of described mullite powder are Al
2O
3Content is 70%-75%, Fe
2O
3≤1.2%, refractoriness>=1800 ℃.
It is under weak oxide atmosphere, to carry out that described step 4) is burnt till.
Described step 2) batching of selected alumina, mullite, aluminum oxide and special excellent clay does in, selected aluminum alumina 60%-80%, mullite 10%-30%, aluminum oxide 10%-25%, kaolin 15%-5%.
The working method that this kind mullite with said structure waters the steel brick has the following advantages:
1. this kind mullite working method of watering the steel brick combines to water the production technology characteristic of steel brick; Selecting the fine aluminum alumina for use is main raw material; In the matrix of adobe, introduce a spot of mullite, aluminum oxide and kaolin earlier; Utilize adobe in sintering process again reaction conversion be mullite and corundum, raw material is easy to get, assist measure is reasonable, production cost is relatively low.
2. this kind mullite waters the mullite that the working method of steel brick produces and waters the steel brick, and corundum and mullite phase content are high, and low melt-phase is few, has stronger corrosion resistance and good thermal shock resistance.
3. this kind mullite waters the advanced practicality of working method production technology, technology of steel brick, controls easy, steady quality, helps mass industrialized production.
Embodiment
The working method that this kind mullite waters the steel brick comprises:
1) the broken grinding and processing of raw material: selected alumina is chosen through artificial; Material piece surface does not have brown " irony layer " or sintering " calcareous molten knurl "; Wherein a part of selected alumina is sent into feed bin through the particulate material that disintegrating apparatus and screening plant are processed into 0mm-1mm and 1mm-3mm, and the selected alumina of another part passes through disintegrating apparatus and fine grinding equipment and screening plant and is processed into 200 order fine powder materials and sends into feed bin; The excellent clay of spy is processed into fine powder; The technical qualification of selected alumina are Al
2O
3Content is 80%-85%, Fe
2O
3≤1.5%, TiO
2≤4.0%, refractoriness>=1800 ℃, body is close>=2.9g/cm
3, water-intake rate≤4%;
Special excellent clay is a kaolin, and its technical qualification are Al
2O
3Content is 30%-25%, Fe
2O
3≤1.2%, refractoriness>=1660 ℃;
Al
2O
3Content is 70%-75%, Fe
2O
3≤1.2%, refractoriness>=1800 ℃;
2) pug preparation: selected alumina, mullite, aluminum oxide and special excellent clay are prepared according to certain ratio of components, and its proportioning is selected aluminum alumina 60%-80%, mullite 10%-30%, aluminum oxide 10%-25%, kaolin 15%-5%; Pug preparation and mixed order of addition(of ingredients) of grinding do; Add particulate material earlier, add wedding agent then, add fine powder material at last; The pug that mixes after grinding mustn't have walk and " white material ", and the granularity of pug and moisture will reach processing requirement;
3) moulding and drying: according to the requirement of user's drawing brick shape; Design the compacting steel mould, with pressing machine pug is pressed into adobe, the apparent porosity of adobe is controlled in the 20%-25% scope; Adobe pushes 80 ℃ of-150 ℃ of tunnel dryers; Dry 24 hours, quality inspection personnel carried out the inspection of semifinished product by the drawing dimensional requirement, and qualified adobe is loaded onto kiln car and prepared to burn till;
4) burn till: adopt the tunnel like calcining kiln that adobe is burnt till, burn till under weak oxide atmosphere and carry out, firing temperature is controlled at 1350 ℃--and 1400 ℃, soaking time was controlled at 5-8 hour;
(5) check: test according to user's brick shape figure paper size and appearance requirement block-by-block, inspect by random samples by batch physical and chemical index that mullite is watered the steel brick.
The physics and chemistry experience index that the mullite of producing waters steel brick finished product is:
| Project | Al 2O 3％ | Fe 2O 3％ | Refractoriness | Compressive strength | Void content | The close g/cm of body 3 |
| Index | ≥68％ | ≤1.5％ | 178 awl CN | ≥25Mpa | ≤28％ | ≥2.30 |
The product that is up to the standards is packed by the consumer packaging requirement and is dispatched from the factory, and mails to the user.
Through the appearance brick that this kind method is manufactured experimently out in testing laboratory, through detecting " mullite phase " content greater than 50%, it is on probation that the appearance brick is dealt into U.S. special steel user, reaches the expection requirement through appearance brick anti-erosion effect on probation; Be mingled with scrap rate to reduce steel alloy, be mingled with scrap rate through steel alloy on probation and descend 2/3rds requiring mullite on probation to water the steel brick; This technology only just increased export trade in 2010 and takes in 1,200 ten thousand yuan, for company has increased the export trade income after company of Magang Stocks Trading Co. refractory Company is implemented.
The working method that this kind mullite waters the steel brick combines to water the production technology characteristic of steel brick; Selecting the fine aluminum alumina for use is main raw material; In the matrix of adobe, introduce a spot of mullite, aluminum oxide and kaolin earlier; Utilize adobe in sintering process again reaction conversion be mullite and corundum, raw material is easy to get, assist measure is reasonable, production cost is relatively low; The mullite of producing waters the steel brick, and corundum and mullite phase content are high, and low melt-phase is few, has stronger corrosion resistance and good thermal shock resistance.
Claims (6)
1. working method that mullite waters the steel brick, it is characterized in that: described working method comprises:
1) the broken grinding and processing of raw material: selected alumina is chosen through artificial; Material piece surface does not have brown " irony layer " or sintering " calcareous molten knurl "; Wherein a part of selected alumina is sent into feed bin through the particulate material that disintegrating apparatus and screening plant are processed into 0mm-1mm and 1mm-3mm, and the selected alumina of another part passes through disintegrating apparatus and fine grinding equipment and screening plant and is processed into 200 order fine powder materials and sends into feed bin; The excellent clay of spy is processed into fine powder;
2) pug preparation: selected alumina, mullite, aluminum oxide and special excellent clay are prepared according to certain ratio of components; Pug preparation and mixed order of addition(of ingredients) of grinding do; Add particulate material earlier, add wedding agent then, add fine powder material at last; The pug that mixes after grinding mustn't have walk and " white material ", and the granularity of pug and moisture will reach processing requirement;
3) moulding and drying: according to the requirement of user's drawing brick shape; Design the compacting steel mould, with pressing machine pug is pressed into adobe, the apparent porosity of adobe is controlled in the 20%-25% scope; Adobe pushes 80 ℃ of-150 ℃ of tunnel dryers; Dry 24 hours, quality inspection personnel carried out the inspection of semifinished product by the drawing dimensional requirement, and qualified adobe is loaded onto kiln car and prepared to burn till;
4) burn till: adopt the tunnel like calcining kiln that adobe is burnt till, firing temperature is controlled at 1350 ℃--and 1400 ℃, soaking time was controlled at 5-8 hour;
(5) check: test according to user's brick shape figure paper size and appearance requirement block-by-block, inspect by random samples by batch physical and chemical index that mullite is watered the steel brick.
2. a kind of mullite according to claim 1 waters the working method of steel brick, it is characterized in that: the technical qualification of described selected alumina are Al
2O
3Content is 80%-85%, Fe
2O
3≤1.5%, TiO
2≤4.0%, refractoriness>=1800 ℃, body is close>=2.9g/cm
3, water-intake rate≤4%.
3. a kind of mullite according to claim 2 waters the working method of steel brick, it is characterized in that: the excellent clay of described spy is a kaolin, and its technical qualification are Al
2O
3Content is 30%-25%, Fe
2O
3≤1.2%, refractoriness>=1660 ℃.
4. a kind of mullite according to claim 3 waters the working method of steel brick, it is characterized in that: the technical qualification of described mullite powder are Al
2O
3Content is 70%-75%, Fe
2O
3≤1.2%, refractoriness>=1800 ℃.
5. the working method of watering the steel brick according to the described a kind of mullite of each claim of claim 1-4 is characterized in that: it is under weak oxide atmosphere, to carry out that described step 4) is burnt till.
6. a kind of mullite according to claim 5 waters the working method of steel brick; It is characterized in that: the batching of selected alumina, mullite, aluminum oxide and special excellent clay does described step 2), selected aluminum alumina 60%-80%, mullite 10%-30%, aluminum oxide 10%-25%, kaolin 15%-5%.
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|---|---|---|---|
| CN2012100928393A CN102659421A (en) | 2012-03-31 | 2012-03-31 | Production method of mullite cast steel brick |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100928393A CN102659421A (en) | 2012-03-31 | 2012-03-31 | Production method of mullite cast steel brick |
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| CN102659421A true CN102659421A (en) | 2012-09-12 |
Family
ID=46769036
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103044065A (en) * | 2012-12-28 | 2013-04-17 | 武汉理工大学 | Porous oxide ceramic heat insulating material for kilns and preparation method of porous oxide ceramic heat insulating material |
| CN103664203A (en) * | 2013-10-25 | 2014-03-26 | 姜斌峰 | Production method of high-alumina mullite cast steel bricks |
| CN104276830A (en) * | 2014-04-22 | 2015-01-14 | 河南鑫诚耐火材料股份有限公司 | High-aluminum pull brick for carbon anode roasting furnace flame paths and preparation method thereof |
| CN106242598A (en) * | 2016-08-05 | 2016-12-21 | 重庆钢铁集团矿业有限公司冶金材料厂 | Inner liner of rotary kiln brick, liner composite brick and manufacture method thereof |
| CN107382349A (en) * | 2017-09-13 | 2017-11-24 | 浙江招通高温材料有限公司 | A kind of preparation method of crack resistence mullite funnel brick |
| CN107619286A (en) * | 2017-09-13 | 2018-01-23 | 浙江招通高温材料有限公司 | A kind of preparation method of corundum-mullite sagger |
| CN107698249A (en) * | 2017-09-15 | 2018-02-16 | 浙江嘉吉石化工程有限公司 | A kind of production method of the low stomata mullite brick of acrylonitrile installation waster water incinerator |
| CN111718188A (en) * | 2020-06-28 | 2020-09-29 | 江苏君耀耐磨耐火材料有限公司 | Aluminum-zirconium brick for transition belt of super-huge rotary cement kiln |
| CN114643338A (en) * | 2022-03-17 | 2022-06-21 | 重庆钢铁股份有限公司 | Method for increasing use times of flow nozzle of cast iron flow divider |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068093A (en) * | 1992-07-04 | 1993-01-20 | 阳泉市东风耐火材料厂 | Mullite casting nozzle brick manufacturing method, mullite casting nozzle brick and application thereof |
-
2012
- 2012-03-31 CN CN2012100928393A patent/CN102659421A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068093A (en) * | 1992-07-04 | 1993-01-20 | 阳泉市东风耐火材料厂 | Mullite casting nozzle brick manufacturing method, mullite casting nozzle brick and application thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103044065A (en) * | 2012-12-28 | 2013-04-17 | 武汉理工大学 | Porous oxide ceramic heat insulating material for kilns and preparation method of porous oxide ceramic heat insulating material |
| CN103044065B (en) * | 2012-12-28 | 2014-05-14 | 武汉理工大学 | Porous oxide ceramic heat insulating material for kilns and preparation method of porous oxide ceramic heat insulating material |
| CN103664203A (en) * | 2013-10-25 | 2014-03-26 | 姜斌峰 | Production method of high-alumina mullite cast steel bricks |
| CN104276830A (en) * | 2014-04-22 | 2015-01-14 | 河南鑫诚耐火材料股份有限公司 | High-aluminum pull brick for carbon anode roasting furnace flame paths and preparation method thereof |
| CN104276830B (en) * | 2014-04-22 | 2015-12-09 | 河南鑫诚耐火材料股份有限公司 | A kind of carbon anode roasting furnace quirk high alumina draws brick and preparation method thereof |
| CN106242598A (en) * | 2016-08-05 | 2016-12-21 | 重庆钢铁集团矿业有限公司冶金材料厂 | Inner liner of rotary kiln brick, liner composite brick and manufacture method thereof |
| CN106242598B (en) * | 2016-08-05 | 2019-05-17 | 重庆钢铁集团矿业有限公司冶金材料厂 | Inner liner of rotary kiln brick, liner composite brick and its manufacturing method |
| CN107382349A (en) * | 2017-09-13 | 2017-11-24 | 浙江招通高温材料有限公司 | A kind of preparation method of crack resistence mullite funnel brick |
| CN107619286A (en) * | 2017-09-13 | 2018-01-23 | 浙江招通高温材料有限公司 | A kind of preparation method of corundum-mullite sagger |
| CN107698249A (en) * | 2017-09-15 | 2018-02-16 | 浙江嘉吉石化工程有限公司 | A kind of production method of the low stomata mullite brick of acrylonitrile installation waster water incinerator |
| CN111718188A (en) * | 2020-06-28 | 2020-09-29 | 江苏君耀耐磨耐火材料有限公司 | Aluminum-zirconium brick for transition belt of super-huge rotary cement kiln |
| CN114643338A (en) * | 2022-03-17 | 2022-06-21 | 重庆钢铁股份有限公司 | Method for increasing use times of flow nozzle of cast iron flow divider |
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Application publication date: 20120912 |