CN104944973A - Refractory brick for hot air furnace - Google Patents
Refractory brick for hot air furnace Download PDFInfo
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- CN104944973A CN104944973A CN201510273454.0A CN201510273454A CN104944973A CN 104944973 A CN104944973 A CN 104944973A CN 201510273454 A CN201510273454 A CN 201510273454A CN 104944973 A CN104944973 A CN 104944973A
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- hot air
- air furnace
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Abstract
The invention discloses a refractory brick for a hot air furnace and relates to the technical field of refractory material manufacturing. The refractory brick consists of the following raw materials in parts by weight: 40-50 parts of alumina clinker, 15-20 parts of silicon carbide powder, 10-15 parts of silicon nitride powder, 20-30 parts of magnesia and 5-8 parts of paper pulp waste liquid; and the refractory brick for the hot air furnace is prepared by the steps of dosing, mixing, ageing, blank making, drying and firing. Compared with the prior art, the refractory brick disclosed by the invention has the advantages of corrosion resistance, high temperature resistance, strong compressive strength and good thermal shock resistance; and moreover, cracks do not appear easily in the using process of the refractory brick for the hot air furnace, and thus the service life is prolonged.
Description
Technical field
The present invention relates to refractory materials manufacturing technology field, especially a kind of hotblast stove refractory brick.
Background technology
Hotblast stove refractory brick requires to have high refractoriness and refractoriness under load, corrosion-resistant, compressive strength is high, good thermal shock, little at temperature change scope thermal expansion coefficient, stability is high, and current refractory brick is high temperature resistant, corrosion-resistant, but compressive strength is not enough, and heat-shock resistance is poor, easily occur that crackle damages as in the use procedure of hotblast stove refractory brick, work-ing life is short.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of hotblast stove refractory brick, to solve the refractory brick compressive strength deficiency that existing method is produced, the problem of heat-shock resistance difference.
In order to solve the problem, the technical solution used in the present invention is: this hotblast stove refractory brick, is made up of the raw material of following weight part: bauxite clinker 40 parts ~ 50 parts, carborundum powder 15 parts ~ 20 parts, silicon nitride powder 10 parts ~ 15 parts, 20 parts ~ 30 parts, magnesia, spent pulping liquor 5 parts ~ 8 parts.
In above-mentioned hotblast stove refractory brick technical scheme, technical scheme can also be more specifically: described magnesia is caustic-calcined magnesite.
Further, the pH value of described spent pulping liquor is 8 ~ 9.
Described bauxite clinker, is called for short high aluminium material, is the main raw material producing refractory product, the various high alumina bricks manufactured with it, is metallurgical industry and the widely used fire-resistant or impregnating material of other industry.
Described silicon carbide, formed by resistance furnace pyrotic smelting with raw materials such as quartz sand, refinery coke (or coal tar), wood chips, its stable chemical performance, thermal conductivity are high, thermal expansivity is little, wear resisting property is good, with the high grade refractory that it is made, resistance to thermal shock, volume are little, lightweight and intensity is high, good energy-conserving effect.
Described silicon nitride, be a kind of superhard material, itself has oilness, and wear-resistant, is atomic crystal, anti-oxidant during high temperature; And it can also resist thermal shock, be heated to more than 1000 DEG C in atmosphere, quick refrigeration sharply heats again, also can not be cracked.
Described magnesia, main component is magnesium oxide, changes stable cubic system into, be commonly called as periclasite after heat, is one of most important raw material of refractory materials; Light-burning magnesium powder is anti-folding, withstand voltage, high strength, air hardening, gelling material, can do high-temperature refractory, can make mold type in mechanical industry.
Described spent pulping liquor is the refuse that paper mill is discharged, and is divided into acid and alkalescence two kinds, main containing lignin derivative, organic acid salt, free sodium hydroxide and sodium sulphite etc. in alkaline pulp waste liquid.
Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect:
The present invention adopts bauxite clinker, silicon carbide and silicon nitride to be main raw material, magnesia and spent pulping liquor are bonding agent, by batching, batch mixing, ageing mixture, base, drying, burn till hotblast stove refractory brick, this refractory brick is corrosion-resistant, high temperature resistant, compressive strength reaches 35MPa ~ 40MPa, good thermal shock, is not easy to occur crackle as in the use procedure of hotblast stove refractory brick, improves work-ing life.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1
A kind of hotblast stove refractory brick, is made up of the raw material of following weight part: bauxite clinker 400 kilograms, carborundum powder 150 kilograms, silicon nitride powder 100 kilograms, 200 kilograms, magnesia, spent pulping liquor 50 kilograms; The magnesia of the present embodiment is caustic-calcined magnesite, and the pH value of spent pulping liquor is 8.
Raw material is taken by the weight part of above-mentioned each raw material, bauxite clinker, carborundum powder and silicon nitride powder are put into mixer stir, then magnesia is added and spent pulping liquor fully mixes, ageing mixture 2 days, brick pressing machine is adopted to make adobe, put into calcining kiln sintering after brick bat drying, obtain this hotblast stove refractory brick.
Embodiment 2
A kind of hotblast stove refractory brick, is made up of the raw material of following weight part: bauxite clinker 500 kilograms, carborundum powder 200 kilograms, silicon nitride powder 150 kilograms, 300 kilograms, magnesia, spent pulping liquor 80 kilograms; The magnesia of the present embodiment is caustic-calcined magnesite, and the pH value of spent pulping liquor is 9.
Raw material is taken by the weight part of above-mentioned each raw material, bauxite clinker, carborundum powder and silicon nitride powder are put into mixer stir, then magnesia is added and spent pulping liquor fully mixes, ageing mixture 3 days, brick pressing machine is adopted to make adobe, put into calcining kiln sintering after brick bat drying, obtain this hotblast stove refractory brick.
Claims (3)
1. a hotblast stove refractory brick, is characterized in that being made up of the raw material of following weight part: bauxite clinker 40 parts ~ 50 parts, carborundum powder 15 parts ~ 20 parts, silicon nitride powder 10 parts ~ 15 parts, 20 parts ~ 30 parts, magnesia, spent pulping liquor 5 parts ~ 8 parts.
2. hotblast stove refractory brick according to claim 1, is characterized in that: described magnesia is caustic-calcined magnesite.
3. hotblast stove refractory brick according to claim 1 and 2, is characterized in that: the pH value of described spent pulping liquor is 8 ~ 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510273454.0A CN104944973A (en) | 2015-05-26 | 2015-05-26 | Refractory brick for hot air furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510273454.0A CN104944973A (en) | 2015-05-26 | 2015-05-26 | Refractory brick for hot air furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104944973A true CN104944973A (en) | 2015-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510273454.0A Pending CN104944973A (en) | 2015-05-26 | 2015-05-26 | Refractory brick for hot air furnace |
Country Status (1)
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| CN (1) | CN104944973A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108752021A (en) * | 2018-06-06 | 2018-11-06 | 郴州联华耐火材料有限公司 | A kind of refractory brick and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047271A (en) * | 1989-05-19 | 1990-11-28 | 鲁有 | High-alumina Mg-Al spinel brick and production method thereof |
| US20110195838A1 (en) * | 2005-05-31 | 2011-08-11 | Michael Donavon Brady | Aluminum titanate ceramic forming batch mixtures and green bodies including pore former combinations and methods of manufacturing and firing same |
| CN102353253A (en) * | 2011-08-17 | 2012-02-15 | 通达耐火技术股份有限公司 | Rotary cement kiln |
| CN102399086A (en) * | 2010-09-09 | 2012-04-04 | 郑州汇特耐火材料有限公司 | Guimo brick and its manufacturing technology |
-
2015
- 2015-05-26 CN CN201510273454.0A patent/CN104944973A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047271A (en) * | 1989-05-19 | 1990-11-28 | 鲁有 | High-alumina Mg-Al spinel brick and production method thereof |
| US20110195838A1 (en) * | 2005-05-31 | 2011-08-11 | Michael Donavon Brady | Aluminum titanate ceramic forming batch mixtures and green bodies including pore former combinations and methods of manufacturing and firing same |
| CN102399086A (en) * | 2010-09-09 | 2012-04-04 | 郑州汇特耐火材料有限公司 | Guimo brick and its manufacturing technology |
| CN102353253A (en) * | 2011-08-17 | 2012-02-15 | 通达耐火技术股份有限公司 | Rotary cement kiln |
Non-Patent Citations (2)
| Title |
|---|
| "基于正交实验的透气砖座砖中尖晶石含量的优化";关岩等;《辽宁科技大学学报》;20080430;第31卷(第2期);122-124,134页 * |
| "氮化硅铁、亚白刚玉和硅微粉加入量对ASC砖性能的影响";王跃等;《耐火材料》;20110630;第45卷(第3期);第194-196页 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108752021A (en) * | 2018-06-06 | 2018-11-06 | 郴州联华耐火材料有限公司 | A kind of refractory brick and preparation method thereof |
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Application publication date: 20150930 |
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