CN103373856A - High-stress-strain low-creepage high-thermal-shock-resistance refractory brick and manufacturing method thereof - Google Patents
High-stress-strain low-creepage high-thermal-shock-resistance refractory brick and manufacturing method thereof Download PDFInfo
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- CN103373856A CN103373856A CN2012101257042A CN201210125704A CN103373856A CN 103373856 A CN103373856 A CN 103373856A CN 2012101257042 A CN2012101257042 A CN 2012101257042A CN 201210125704 A CN201210125704 A CN 201210125704A CN 103373856 A CN103373856 A CN 103373856A
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Abstract
The invention discloses a manufacturing method of a refractory brick. According to the manufacturing method, low-and-medium-grade andalusite (the contents of Al2O3 are 53%, 55% and 57%) are used as main raw materials, large and intermediate andalusite particles are replaced with large mullite particles and intermediate cordierite particles, and corundum, alpha-Al2O3 micropowder and SiO2 micropowder and combining clay and waste paper pulp are added. The preparation method comprises the following steps of: mixing the ingredients in a wet pan mill evenly and then discharging out of the mill; forming by a frictional brick press; drying the formed green blanks in a dryer; calcining the dried blanks in a calcining kiln, wherein the highest calcining temperature ranges from 1370DEG C to 1400DEG C. The refractory brick obtained by adopting the method can effectively solve the problems of the conventional refractory brick, such as high manufacturing cost, low load softness, large creepage, poor anti-seismic property and short service life; the appearance defects of the refractory brick are fewer, and the refractory brick can be widely applied in a ceramic burner of an ironmaking blast-furnace hot blast stove.
Description
Technical field
The present invention relates to a kind of high RUL of the ceramic burner use of iron-smelting blast furnace hotblast stove, low creep, highly heatproof and shockproof refractory brick and manufacture method thereof.
Background technology
The progress of science and technology with fast-developing need and so that the life-span of hotblast stove more and more longer, what demand was not complementary therewith is that the used refractory brick of ceramic burner is harsh because of working conditions in the hotblast stove, loading under the long term high temperature, temperature variation is large, frequency is high, cause its life-span short, therefore be necessary to research and develop the refractory brick of a kind of high RUL, low creep, highly heatproof and shockproof, thereby improve the bulk life time of hotblast stove.The refractory brick that patent CN200510107318.0 describes adopts the mullite macrobead, trichroite, andaluzite are base-material, the refractory brick that makes has solved the problem of poor seismic behavior, but since particulate state to be mainly the content of mullite and trichroite higher so that lotus soft low, creep is large.Patent CN200510107316.1 is take high aluminium material as main raw material, although reduced cost, because the content of high aluminium material is higher, so that the lotus of this refractory brick is soft low, creep is poor, and the anti-thermal shock of 1300 ℃ of water-cooleds is relatively poor.Therefore, be necessary to research and develop the performance that a kind of refractory brick can satisfy high RUL, low creep, highly heatproof and shockproof simultaneously.
Summary of the invention
The objective of the invention is in order to guarantee the ceramic combustor of hot-blast stove existing good heat-shock resistance of brick, good creep resistance and higher refractoriness under load are arranged again and a kind of low cost, high RUL, low creep, highly heatproof and shockproof brick are provided, to improve the bulk life time of hotblast stove.
Another object of the present invention provides a kind of preparation method of this refractory brick.
The batching of preparation refractory brick of the present invention is composed of the following components by weight percentage:
In refractory brick of the present invention batching, adopt aboundresources, price lower in the andaluzite (Al of low grade
2O
3Content 53%, 55%, 57%) be main raw material, to reduce production costs; Particulate material mainly adopts andaluzite and a small amount of synthesis of dichroite, and is soft with the lotus of improving refractory brick, reduces creep; Because the thermal expansivity of trichroite is very little, adopt part trichroite raw material to replace andaluzite, further improve the heat-shock resistance of refractory brick, to prolong the work-ing life of refractory brick; Because the andaluzite of low grade in adopting for the macroscopic irregularity (blackspot, solution cavity, crackle etc.) of improving andalusite brick, adopts M70 natural mullite synthesizing Partial Replacement andaluzite macrobead (1-3mm), improves the qualification rate of andalusite brick.
In above-mentioned raw materials, the content of synthesis of dichroite is preferably 10%, and the content of mullite synthesizing is preferably 20%.
The method for preparing refractory brick of the present invention is comprised of following steps successively:
(1) by above-mentioned weight percent will prepare burden in edge runner-wet mill, carry out mixing, elder generation's overstriking (1-3mm), in (＜1mm) particle adds spent pulping liquor more afterwards, make paper pulp whole wetting particles at night after, add again fine powder (≤180 order), go out to grind after mixing evenly;
(2) carry out moulding at friction press;
(3) green compact with forming fill dry kiln car, advance tunnel drier dry;
(4) dried base substrate is pressed loading of kiln figure kiln loading vehicle, push the tunnel like calcining kiln and burn till, the highest temperature of burning till is 1370 ℃-1400 ℃.
Embodiment
Further specify the present invention below by embodiment and Comparative Examples.
Embodiment 1
At first, each batching according to 1 correspondence of embodiment in the table 1 prepares by listed weight percent, batching is inserted the stone roller that wets in the edge runner-wet mill, elder generation's overstriking (1-3mm), in (＜1mm) particle, then add spent pulping liquor, after making paper pulp whole wetting particles at night, add again fine powder (≤180 order), mixingly go out to grind after evenly.Place again compression moulding in the friction press, after the green compact of forming are filled dry kiln car, advance tunnel drier dry.Dried base substrate pushes the tunnel like calcining kiln and burns till by loading of kiln figure kiln loading vehicle, the highest 1370 ℃-1400 ℃ of the temperature of burning till.The lotus of measuring this refractory brick is soft, creep rate and heat-shock resistance, has listed test result in table 1.
Embodiment 2
Each component concentration of pressing embodiment 2 appointments in the table 1 repeats the method for embodiment 1, and test that its lotus is soft, creep rate and heat-shock resistance.
Table 1
The refractory brick that is made into according to the composition proportion of prior art, and the result that, creep rate soft to its lotus and heat-shock resistance are tested is shown in Comparative Examples 1 and Comparative Examples 2:
Comparative Examples 1
To prepare burden according to table 2 prepares by listed weight percent, evenly uses the forming machine moulding through mixing, fires in the sintering oven under 〉=1350 ℃ of high temperature to form again.The lotus of then measuring this refractory brick is soft, creep rate and heat-shock resistance, has listed test result in table 2.
Table 2
Comparative Examples 2
To prepare burden according to table 3 prepares by listed weight percent, evenly uses the forming machine moulding through mixing, fires in the sintering oven under 〉=1350 ℃ of high temperature to form again.The lotus of then measuring this refractory brick is soft, creep rate and heat-shock resistance, has listed test result in table 3.
Table 3
(annotate: the negative sign of creep rate represents compression in the above table.)
Conclusion: the lotus of comparing embodiment and Comparative Examples product is soft, creep rate and anti-thermal shock data as can be known, its lotus of product of adopting composition proportion of the present invention and method to produce is soft, creep rate and thermal shock resistance are enhanced than prior art.
Claims (5)
1. a high RUL, low creep, highly heatproof and shockproof refractory brick, the batching of producing this refractory brick is composed of the following components by weight percentage:
2. a kind of high RUL according to claim 1, low creep, highly heatproof and shockproof refractory brick is characterized in that, described andaluzite is the andaluzite of low grade in adopting, i.e. Al
2O
3Content is respectively 53%, 55%, 57% andaluzite.
3. a kind of high RUL according to claim 1, low creep, highly heatproof and shockproof refractory brick is characterized in that 1-3mm mullite synthesizing content is preferably 20%.
4. a kind of high RUL according to claim 1, low creep, highly heatproof and shockproof refractory brick is characterized in that 0-1mm synthesis of dichroite content is preferably 10%.
5. the method for the above described high RUL of arbitrary claim of preparation, low creep, highly heatproof and shockproof refractory brick is characterized in that the method comprises by following steps to form:
(1) in edge runner-wet mill, adds first andaluzite and the mullite synthesizing that granular size is 1-3mm, add again particle less than andaluzite and the synthesis of dichroite of 1mm, then add spent pulping liquor, make described paper pulp whole wetting particles at useless night after, add again≤180 purpose fine powders, go out to grind after mixing evenly;
(2) carry out moulding at friction press;
(3) green compact with forming fill dry kiln car, advance tunnel drier dry;
(4) dried base substrate being pressed loading of kiln figure kiln loading vehicle, is between 1370 ℃-1400 ℃ in the highest temperature of burning till, and pushes the tunnel like calcining kiln and burns till.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210125704.2A CN103373856B (en) | 2012-04-26 | 2012-04-26 | High-stress-strain low-creepage high-thermal-shock-resistance refractory brick and manufacturing method thereof |
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| CN201210125704.2A CN103373856B (en) | 2012-04-26 | 2012-04-26 | High-stress-strain low-creepage high-thermal-shock-resistance refractory brick and manufacturing method thereof |
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| CN103373856A true CN103373856A (en) | 2013-10-30 |
| CN103373856B CN103373856B (en) | 2015-05-20 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060905A (en) * | 2015-07-24 | 2015-11-18 | 瑞泰科技股份有限公司 | Low-aluminum alkali-resistant mullite brick and preparation method thereof |
| CN106220194A (en) * | 2016-07-11 | 2016-12-14 | 雷春生 | A kind of preparation method of low creep anti-thermal shock burner block |
| JP2017065956A (en) * | 2015-09-29 | 2017-04-06 | 黒崎播磨株式会社 | Alumina-silica-based brick |
| JP2018052776A (en) * | 2016-09-29 | 2018-04-05 | 黒崎播磨株式会社 | Method for production of checker brick for air heating furnace |
| CN108911772A (en) * | 2018-08-27 | 2018-11-30 | 山东工业职业学院 | A kind of blast furnace cooling stave is inlayed with brick and its production technology |
| CN110105059A (en) * | 2019-05-17 | 2019-08-09 | 山东工业职业学院 | A kind of highly heatproof and shockproof, low creep hot-blast stove brick and its manufacturing method |
| CN115490505A (en) * | 2022-11-02 | 2022-12-20 | 中钢洛耐科技股份有限公司 | Anti-scouring mullite runner brick and preparation method thereof |
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| JPH08283073A (en) * | 1995-04-11 | 1996-10-29 | Ngk Insulators Ltd | Kiln tool |
| CN1788963A (en) * | 2005-12-15 | 2006-06-21 | 郑州豫兴耐火材料有限公司 | Slurry-bound firebrick formation method |
| CN1793052A (en) * | 2005-12-23 | 2006-06-28 | 郑州豫兴耐火材料有限公司 | Thermal-shock resistant fireproof brick and production process thereof |
| CN1800087A (en) * | 2006-01-16 | 2006-07-12 | 宜兴市宝欣耐火材料有限公司 | Highly heatproof and shockproof mullite-cordierite refractory composition |
| CN101481255A (en) * | 2009-02-19 | 2009-07-15 | 浙江大学 | High-heat resistance shock resistant mullite bearing burning plate and preparation thereof |
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Patent Citations (5)
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| JPH08283073A (en) * | 1995-04-11 | 1996-10-29 | Ngk Insulators Ltd | Kiln tool |
| CN1788963A (en) * | 2005-12-15 | 2006-06-21 | 郑州豫兴耐火材料有限公司 | Slurry-bound firebrick formation method |
| CN1793052A (en) * | 2005-12-23 | 2006-06-28 | 郑州豫兴耐火材料有限公司 | Thermal-shock resistant fireproof brick and production process thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060905A (en) * | 2015-07-24 | 2015-11-18 | 瑞泰科技股份有限公司 | Low-aluminum alkali-resistant mullite brick and preparation method thereof |
| JP2017065956A (en) * | 2015-09-29 | 2017-04-06 | 黒崎播磨株式会社 | Alumina-silica-based brick |
| CN106220194A (en) * | 2016-07-11 | 2016-12-14 | 雷春生 | A kind of preparation method of low creep anti-thermal shock burner block |
| JP2018052776A (en) * | 2016-09-29 | 2018-04-05 | 黒崎播磨株式会社 | Method for production of checker brick for air heating furnace |
| CN108911772A (en) * | 2018-08-27 | 2018-11-30 | 山东工业职业学院 | A kind of blast furnace cooling stave is inlayed with brick and its production technology |
| CN110105059A (en) * | 2019-05-17 | 2019-08-09 | 山东工业职业学院 | A kind of highly heatproof and shockproof, low creep hot-blast stove brick and its manufacturing method |
| CN110105059B (en) * | 2019-05-17 | 2021-10-29 | 山东工业职业学院 | Brick for hot blast stove with high thermal shock resistance and low creep deformation and manufacturing method thereof |
| CN115490505A (en) * | 2022-11-02 | 2022-12-20 | 中钢洛耐科技股份有限公司 | Anti-scouring mullite runner brick and preparation method thereof |
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| CN103373856B (en) | 2015-05-20 |
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