CN103172394B - Refractory brick and preparation method thereof - Google Patents
Refractory brick and preparation method thereof Download PDFInfo
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- CN103172394B CN103172394B CN201310089838.8A CN201310089838A CN103172394B CN 103172394 B CN103172394 B CN 103172394B CN 201310089838 A CN201310089838 A CN 201310089838A CN 103172394 B CN103172394 B CN 103172394B
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Abstract
The invention discloses a refractory brick and a preparation method thereof; the refractory brick comprises the raw materials by weight percent: 60-70% of high-aluminum refractory aggregate, 20-30% of refractory cement, 1-3% of metal aluminum powder, 1-3% of metal silicon powder, 2-4% of silica micro-powder and 5-10% of aluminum oxide. The preparation method comprises the steps of: evenly mixing the metal aluminum powder, the metal silicon powder, the silica micro-powder and the aluminum oxide; adding hot water for diluting the mixture, wherein the amount of the hot water is 4-5 times more than the total amount of the mixture, and the temperature of the hot water is 70-90 DEG C; adding the high-aluminum refractory aggregate and the refractory cement into the diluted mixture, and evenly stirring; putting a product into a mould for molding; and drying to obtain the refractory brick. The refractory brick is not required to be fired, and can be directly molded by the mould after being evenly stirred; and the refractory brick can be recycled after being rejected.
Description
Technical field
The present invention relates to technical field of refractory materials, particularly a kind ofly build and build kiln body or liner refractory brick used for High-temp. kiln.
Background technology
Refractory materials is the important basic material of industrial circle, industrial furnace and the liner thereof of the smelting of iron and steel, oven coke, mechanical thermal treatment system all need refractory materials at present, in stove and liner need to use a large amount of refractory brick, existing refractory brick is mostly cement insulating fire brick, and clay brick is mainly made up of mullite (25%～50%), glassy phase (25%～60%) and cristobalite and quartz (reaching as high as 30%).Conventionally taking flint clay as raw material, mature calcined material in advance, is then equipped with soft clay, and with semidrying or plastic making, temperature is burnt till clay brick goods at 1300～1400 C.Also a small amount of bonding agent such as water glass, cement be can add and not burned product and unsetting material made.Base is mainly used in blast furnace, hotblast stove, process furnace, power boiler, limestone kiln, rotary kiln, glass furnace, pottery and refractory brick calcining kiln.This clay refractory brick needs in kiln, fire in advance, and this not only will consume a large amount of fuel, simultaneously can combustion gas, and contaminate environment, wastes energy, and has improved the cost of refractory brick simultaneously.Also have this refractory brick short work-ing life, not recycling.
Separately there is China Patent No. to be: 200710062457.5 patent of invention discloses a kind of silica heat-proof firebrick, be specially one and be applicable to coke oven, the silica heat-proof firebrick of carbon furnace, solving existing clay insulating refractory block exists loading texturing temperature low, under high temperature, easily shrink, thermal conductivity is larger, the defects such as heat insulation effect is bad, by silica fine powder 81-85%, perlite 15-19%, the additional following auxiliary material that accounts for above-mentioned main raw material gross weight: iron scale powder 0.45-0.55%, cement 0.9-1.1%, milk of lime 6.5-7.5%, paper pulp 1.95-2.2%, by silica fine powder, perlite adds in wet stone roller in proportion, then add iron scale powder, cement is dry to be ground after 1-2 minute, add the water of the 1.8-2.2% that accounts for main raw material gross weight, then add milk of lime, roll 10-15 minute, finally add paper pulp, roll 10-15 minute, go out to grind, moulding base.In the present invention, used milk of lime, paper pulp, pearl rock etc., it is limited that it is high temperature resistant, and work-ing life is limited, and refractory brick can not reclaim and be used again after scrapping.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the invention provides a kind of refractory brick, this refractory brick does not need to fire, and high temperature resistant, long service life, the simple easy construction of technique, good integrity, shrinkability, thermal shock resistance is relatively good, has less shrinkage, by useless rear also recyclable recycling, be beneficial to the environmental friendly regenerated utilization of resources.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A kind of refractory brick, is characterized in that: the raw material by following portions by weight forms:
High-alumina refractory aggregate 60%-70%, refractory cements 20%-30%, metallic aluminium powder 1%-3%, metallic silicon power 1%-3%, silicon powder 2%-4%, aluminum oxide 5%-10%.
The parts by weight of described raw material are: high-alumina refractory aggregate 62%-66%, refractory cements 22%-28%, metallic aluminium powder 2%-3%, metallic silicon power 2%-3%, silicon powder 2%-3%, aluminum oxide 5%-8%.
The parts by weight of described raw material are: high-alumina refractory aggregate 65%, refractory cements 25%, metallic aluminium powder 2%, metallic silicon power 2%, silicon powder 2%, aluminum oxide 4%;
Described high-alumina refractory aggregate comprises 40% coarse fodder and 25% fines; Described coarse fodder particle diameter is 10-15MM, and fines particle diameter is 1-5MM;
Described metallic aluminium powder and metallic silicon power fineness are 1000 orders.
The preparation method of above-mentioned refractory brick is: metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide are mixed, the 4-5 times of temperature that adds its total amount is the dilution of 70--90 DEG C of degree hot water, add again high-alumina refractory aggregate, refractory cements to mix thoroughly, pack mould molding into, dry and make.
The present invention has the following advantages:
1, in the present invention, bonding agent: by metallic aluminium powder 1%-3%, metallic silicon power 1%-3%, silicon powder 2%-4%, aluminum oxide 5%-10% mixes, add the 4-5 of its total amount doubly, temperature is the dilution of 70--90 DEG C of degree hot water, add again high-alumina refractory aggregate 60%-70%, refractory cements 20%-30% mixes thoroughly, pack mould molding into, dry and make, make this refractory brick not need to fire, can directly mix mould molding thoroughly, dry and make, it is high temperature resistant significantly improves 30%, can reach more than 1800 DEG C, and refractoriness under load improves, linear expansivity is little, strengthen thermal shock number, life-span is long, this refractory brick is scrapped rear recyclable recycling, can build stripping and slicing.
2, metallic aluminium powder 2%-3% in the present invention, metallic silicon power 2%-3%, silicon powder 2%-3%, aluminum oxide 5%-8% mixes, and the 4-5 that adds its total amount doubly, temperature is the dilution of 70--90 DEG C of degree hot water, then adds high-alumina refractory aggregate 62%-66%, refractory cements 22%-28% mixes thoroughly, pack mould molding into, dry and make, make this refractory brick not need to fire, effectively conduct heat and strengthen, invalid heat transfer reduces, improve output, burnup, service life of kiln body technico-economical comparison is all greatly improved.
3, in preparation method of the present invention, in connection with agent: metallic aluminium powder 2%, metallic silicon power 2%, silicon powder 2%, aluminum oxide 4% mixes, add its total amount 4-5 70--90 DEG C of degree hot water dilution doubly, then add high-alumina refractory aggregate 65%, refractory cements 25% is mixed thoroughly, pack mould molding into, dry and make, this formula not only has above-mentioned advantage, and anti-oxidant high strength, has certain thermal conductivity and heat-shock resistance; Described high-alumina refractory aggregate comprises 40% coarse fodder and 25% fines; Described coarse fodder particle diameter is 10-15MM, and fines particle diameter is 1-5MM, facts have proved that it has higher high temperature resistant, ultimate compression strength; Described metallic aluminium powder and metallic silicon power fineness are 1000 orders, strengthen mobility.
4, in the present invention, in formula and preparation method, add its total amount 4-5 70--90 DEG C of degree hot water dilution doubly, can make raw material fully mix, its method is simple, practicality.
Embodiment
Embodiment 1
A kind of refractory brick, is made up of the raw material of following portions by weight: high-alumina refractory aggregate 62%-66%, refractory cements 22%-28%, metallic aluminium powder 2%-3%, metallic silicon power 2%-3%, silicon powder 2%-3%, aluminum oxide 5%-8%.
The preparation method of this refractory brick is: metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide in above-mentioned formula are mixed thoroughly, add 4-5 doubly, temperature is the dilution of 70--90 DEG C of degree hot water, and then add high-alumina refractory aggregate, refractory cements in above-mentioned formula to mix thoroughly, pack mould molding into, dry and make, pack into as required square or make natural moulding in the mould of hollow or other shape by above-mentioned compound, and generally needing can dry for 10-30 days according to temperature height and become product.
In this formula, add bonding agent, be metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide, make this refractory brick not need to fire, can mould molding after stirring, dry and make, its refractory temperature improves 30%, can reach more than 1800 DEG C, refractoriness under load improves, and linear expansivity is little, strengthen thermal shock number, life-span is long, and this refractory brick scraps rear recyclable recycling, can build stripping and slicing.
Described refractory cements is also aluminate cement.Aluminate cement is taking bauxitic clay and Wingdale as raw material, make through calcining taking calcium aluminate as main component, the grog of alumina content approximately 50%, the hydraulic cementing materials of regrinding and making.Aluminate cement Chang Weihuang or brown, also have grizzly.The essential mineral of aluminate cement becomes monocalcium aluminate (CaOAl2O3 writes a Chinese character in simplified form CA) and other aluminate, and a small amount of Dicalcium Phosphate (Feed Grade) (2CaOSiO2) etc.Described high-alumina refractory aggregate that is to say bauxites aggregate, alumina aggregate, also be refractory aggregate, the of high grade bauxites aggregate that is called, it is indispensable raw material in refractory castable, its can and high-alumina cement, fine powder, be mixed in proportion the very high refractory concrete of rear generation intensity.
Embodiment 2
A kind of refractory brick, is made up of the raw material of following portions by weight: high-alumina refractory aggregate 70%, refractory cements 20%, metallic aluminium powder 1%, metallic silicon power 1%, silicon powder 2%, aluminum oxide 6%.
The preparation method of this refractory brick is: metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide in above-mentioned formula are mixed thoroughly, described metallic aluminium powder and metallic silicon power fineness are 1000 orders, add 4-5 doubly, temperature is the dilution of 70 DEG C of degree hot water, and then add high-alumina refractory aggregate, refractory cements in above-mentioned formula to mix thoroughly, pack mould molding into, dry and make.
In this formula, added bonding agent, i.e. metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide, makes this refractory brick not need to fire, can mould molding after stirring, dry and make, its refractory temperature improves 30%, can reach more than 1800 DEG C, and this refractory brick is scrapped rear recyclable recycling, after scrapping, can pulverize and add above bonding agent to mix thoroughly again can to make refractory brick, effectively conduct heat and strengthen, invalid heat transfer reduces, and improves output, burnup, service life of kiln body technico-economical comparison is all greatly improved.
Embodiment 3
A kind of refractory brick, is made up of the raw material of following portions by weight: high-alumina refractory aggregate 60%, refractory cements 30%, metallic aluminium powder 3%, metallic silicon power 3%, silicon powder 4%, aluminum oxide 10%.
The preparation method of this refractory brick is: metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide in above-mentioned formula are mixed thoroughly, described metallic aluminium powder and metallic silicon power fineness are 1000 orders, adding weight is 5 times, temperature is the dilution of 90 DEG C of degree hot water, and then add high-alumina refractory aggregate in above-mentioned formula, (wherein high-alumina refractory aggregate comprises that particle diameter is the coarse fodder 40% of 10-15MM and the fines 25% that particle diameter is 0-5MM); Mix thoroughly with refractory cements, pack mould molding into, dry and make.
In this formula, add bonding agent, be metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide, make this refractory brick not need to fire, can mould molding after stirring, dry and make, its refractory temperature improves 30%, can reach more than 1800 DEG C, and this refractory brick scraps rear recyclable recycling, after scrapping, can pulverize and mix again making refractory brick thoroughly.
Embodiment 4
A kind of refractory brick, is made up of the raw material of following portions by weight: high-alumina refractory aggregate 65%, refractory cements 25%, metallic aluminium powder 2%, metallic silicon power 2%, silicon powder 2%, aluminum oxide 4%;
The preparation method of this refractory brick is: metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide in above-mentioned formula are mixed thoroughly, described metallic aluminium powder and metallic silicon power fineness are 1000 orders, adding weight is 5 times of its gross weights, temperature is the dilution of 85 DEG C of degree hot water, and then add high-alumina refractory aggregate and refractory cements in above-mentioned formula to mix thoroughly, pack mould molding into, dry and make, and anti-oxidant high strength, certain thermal conductivity and heat-shock resistance had; High-alumina refractory aggregate comprises the coarse fodder of particle diameter 10-15MM and the fines that particle diameter is 1-5MM, facts have proved that it has higher high temperature resistant, ultimate compression strength; Described metallic aluminium powder and metallic silicon power fineness are 1000 orders, strengthen mobility.
In this formula, add bonding agent, be metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide, make this refractory brick not need to fire, can mould molding after stirring, dry and make, its refractory temperature improves 30%, can reach more than 1800 DEG C, and this refractory brick scraps rear recyclable recycling, after scrapping, can pulverize and mix again making refractory brick thoroughly, adding its total amount 4-5 70--90 DEG C of degree hot water dilution doubly, can make raw material fully mix, its method is simple, practicality.
Claims (2)
1. a refractory brick, is characterized in that: the raw material by following portions by weight forms:
High-alumina refractory aggregate 65%, refractory cements 25%, metallic aluminium powder 2%, metallic silicon power 2%, silicon powder 2%, aluminum oxide 4%;
Described high-alumina refractory aggregate comprises 40% coarse fodder and 25% fines; Described coarse fodder particle diameter is 10-15mm, and fines particle diameter is 1-5mm;
Described metallic aluminium powder and metallic silicon power fineness are 1000 orders.
2. the preparation method of a kind of refractory brick according to claim 1, be: metallic aluminium powder, metallic silicon power, silicon powder, aluminum oxide are mixed, the 4-5 times of temperature that adds its total amount is the dilution of 70--90 DEG C of degree hot water, add again high-alumina refractory aggregate, refractory cements to mix thoroughly, pack mould molding into, dry and make.
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| CN103172394B true CN103172394B (en) | 2014-06-25 |
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| CN101838150A (en) * | 2010-04-01 | 2010-09-22 | 范圣良 | Siliceous mullite brick |
| CN102887715B (en) * | 2011-07-22 | 2014-07-23 | 宝山钢铁股份有限公司 | Ladle permanent lining pouring material capable of rapid roasting |
| CN102659422B (en) * | 2012-04-11 | 2013-11-06 | 河南中原特种耐火材料有限公司 | Large compound energy-saving refractory brick and production method thereof |
| CN102674859B (en) * | 2012-05-24 | 2014-01-08 | 洛阳理工学院 | Refractory castable for kilneye and kiln head cover of rotary kiln |
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Inventor after: Yuan Pingxi Inventor after: Sun Shiwen Inventor after: Wu Pengcheng Inventor before: Du Xiaoliang Inventor before: Ma Pingan Inventor before: Yin Huajian |
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Effective date of registration: 20180417 Address after: 417600 cold water village, Shang Mei Town, Xinhua, Loudi, Hunan Patentee after: Xinhua Tengyu charge Ltd. Address before: 618000 Shaw farm, Deyang, Sichuan Patentee before: Deyang Yida Electromechanical Heat Treatment Co., Ltd. |