CN108298963A - A kind of high temperature corundum-mullite refractory slab and preparation method thereof - Google Patents
A kind of high temperature corundum-mullite refractory slab and preparation method thereof Download PDFInfo
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/185—Mullite 3Al2O3-2SiO2
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
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Abstract
The present invention relates to a kind of high temperature corundum-mullite refractory slabs and preparation method thereof.Its technical solution is：The grain size of plate diamond spar particle, 12.0~27.0wt% with the grain size of 28.0~43.0wt% less than 5mm and more than or equal to 3mm is less than 3mm and the grain size of plate diamond spar particle, 11.0~26.0wt% more than or equal to 1mm is less than 1mm and is more than or equal to the α Al of the plate diamond spar particle of 0.5mm, plate diamond spar fine powder of the grain size less than or equal to 0.074mm of 14.0~29.0wt%, 5.0~10.0wt%2O3The silica flour of fine powder and 0.5~1.0wt% are raw material, and the bonding agent of the additional 5.5~8.5wt% of raw material is uniformly mixed, the mechanical pressing under the conditions of 120~150MPa, it is dry, 3~6h is then kept the temperature under the conditions of 1500~1650 DEG C to get high temperature corundum-mullite refractory slab.The present invention has the characteristics that environmental-friendly and simple for process；Good thermal shock stability, the mechanical strength of made product are big, temperature in use is high and use scope is wide.
Description
Technical field
The invention belongs to refractory kiln technical fields.More particularly to a kind of high temperature corundum-mullite refractory slab and its preparation
Method.
Background technology
With the rapid development of social economy, kiln furnitures are as a kind of special refractory material, it has also become ceramic industry and resistance to
The essential high temperature auxiliary material product of the industries such as fiery material industry.Kiln furnitures are generally divided into three categories：The first kind be tunnel oven,
The lightweight skirt brick of car top used in the kilns such as shuttle kiln, such slightly lower of kiln furnitures use environment temperature can mainly be born
As long as the load of pressure and can achieve the purpose that low accumulation of heat；Second class is column, refractory slab and crossbeam etc., such kiln furnitures is direct
With flame contact, use environment temperature is high, and refractory slab and crossbeam etc. need the double action for bearing high temperature and load-bearing pressure, so wanting
It asks and has high high temperature break resistant intensity and good heat-resistant knocking stability；Third class is the special kiln of ceramic body in bearing firing
Tool, such as saggar and backing plate, such kiln furnitures not necessarily directly and flame contact, and are solely subjected to the gravity of porcelain piece, so it is used
Environment is far better.In these kiln furnitures, the area of refractory slab is big and thickness is thin, is the current maximum part of kiln furnitures dosage, nothing
By being production or use, it is most representative.Common refractory slab material has mullite, cordierite, oxide in production
In conjunction with SiC matter, silicon carbide reaction-sintered (SiSiC) etc..
It is analyzed according to the market status, is used for the high temperature refractory slab brick of shuttle kiln, it is most of to rely on import, but it is expensive,
Cost is higher；And home products it is opposite there are thermal shock resistance difference and it is yielding the shortcomings of, considerably increase the replacement of refractory slab brick
The frequency, especially because high temperature refractory slab brick is (general in high temperature>1700 DEG C) under carrying object amount it is larger, bear larger pressure, it is right
The shear stress of material is larger, easily makes refractory slab that hot bending deformation occur, seriously restricts the use of refractory slab.
Currently, the technology for preparing high temperature refractory slab has：Such as " dichroite-mullite refractory slab and preparation method thereof "
(CN103936406A) patented technology, the technology using mullite, clay as aggregate, with talcum powder, kyanite, andalusite, magnesium powder,
Dichroite-mullite refractory slab art is made in the matrix such as aluminium oxide, and main phase composition is cordierite and Mo Lai in obtained refractory slab
Stone, temperature in use are less than 1350 DEG C；There is document (development of one mullite high temperature refractory slab of the ﹒ such as Liu Wei corundum and ﹒ fire proofed woods should be used
Liao ﹒ 2006,1,71-74) report, high temperature refractory slab is prepared as raw material using plate diamond spar, electro-corundum sand and high silicon organic matter, the skill
High temperature refractory slab cost of material made from art is higher, and firing temperature is up to 1700 DEG C, and development is restricted；Separately there is document (to build slowly
The performance Yan Jiu ﹒ refractory materials of one mullite pouring material of Feng Deng ﹒ silicasol-combined corundums and corundum, 2012,46 (2), 90-95)
Corundum-mullite is made using fused white corundum, electrofused mullite, alumina powder, fine silica powder and Ludox in report
Refractory material, refractory product intensity made from the technology are relatively low.
Invention content
The present invention is directed to overcome prior art defect, it is therefore an objective to provide a kind of environmental-friendly and simple for process high temperature with just
The preparation method of jade-mullite refractory slab；With the good thermal shock stability of the corundum-mullite refractory slab of the high temperature prepared by the method, machine
Tool intensity is big, temperature in use is high and use scope is wide.
To achieve the above object, the technical solution adopted in the present invention is：It is less than 5mm with the grain size of 28.0~43.0wt%
And it is rigid to be more than or equal to plate of the grain size of the plate diamond spar particle of 3mm, 12.0~27.0wt% less than 3mm and more than or equal to 1mm
Beautiful particle, 8.0~23.0wt% grain size be less than 1mm and more than or equal to 0.5mm plate diamond spar particle, 14.0~29.0wt%
Grain size less than or equal to the plate diamond spar fine powder of 0.074mm, the α-Al of 5.0~10.0wt%2O3Fine powder and 0.5~1.0wt%'s
Silica flour is raw material, the bonding agent of the additional 5.5~8.5wt% of raw material, is uniformly mixed, obtains mixture；Again by the mixing
Material mechanical pressing under the conditions of 120~150MPa, it is dry, it is warming up to 1500~1650 DEG C in tunnel oven, keeps the temperature 3~6h, i.e.,
Obtain high temperature corundum-mullite refractory slab.
The chemical composition of the plate diamond spar is：Al2O3Content >=99.6wt%；SiO2Content≤0.09wt%；Fe2O3Contain
Amount≤0.03wt%.
α-the Al2O3The grain size of fine powder is less than 0.088mm；α-the Al2O3The Al of fine powder2O3Content >=99.5wt%.
The grain size of the silica flour is less than 0.044mm；Si contents >=98.0wt% of the silica flour.
The bonding agent is arbitrary two kinds of mixture in zirconium colloidal sol, Ludox and polyvinyl alcohol.
Due to the adoption of the above technical scheme, the present invention has the positive effect that compared with prior art：
1, the present invention is with plate diamond spar, α-Al2O3It is primary raw material with simple substance silica flour, through mechanical pressing and in tunnel oven
Firing has the advantages that simple for process low with cost of material to get to high temperature corundum-mullite refractory slab.
2, high temperature produced by the present invention is had excellent performance wide with use scope with corundum-mullite refractory slab, can be used for 1700 DEG C
On above intermittent shuttle kiln, and it disclosure satisfy that its requirement frequently used, pollution-free to firing product, market prospects can
It sees.
Therefore, the present invention has the characteristics that environmental-friendly and simple for process；Prepared high temperature corundum-mullite refractory slab
Good thermal shock stability, mechanical strength are big and temperature in use is high and use scope is wide.
Specific implementation mode
The present invention will be further described With reference to embodiment, not to the limit of the scope of the present invention
System.
It is first that the related technical parameter Unify legislation involved by present embodiment is as follows to avoid repeating, embodiment
In repeat no more：
The chemical composition of the plate diamond spar is：Al2O3Content >=99.6wt%；SiO2Content≤0.09wt%；Fe2O3Contain
Amount≤0.03wt%.
α-the Al2O3The grain size of fine powder is less than 0.088mm；α-the Al2O3The Al of fine powder2O3Content >=99.5wt%.
The grain size of the silica flour is less than 0.044mm；Si contents >=98.0wt% of the silica flour.
Embodiment 1
A kind of high temperature corundum-mullite refractory slab and preparation method thereof.With the grain size of 28.0~31.0wt% be less than 5mm and
The grain size of plate diamond spar particle, 12.0~15.0wt% more than or equal to 3mm is less than 3mm and the plate diamond spar more than or equal to 1mm
Particle, 20.0~23.0wt% grain size be less than 1mm and more than or equal to 0.5mm plate diamond spar particle, 26.0~29.0wt%
Grain size less than or equal to the plate diamond spar fine powder of 0.074mm, the α-Al of 5.0~6.0wt%2O3Fine powder and 0.5~0.6wt%'s
Silica flour is raw material, the polyvinyl alcohol of the zirconium colloidal sol and 5.0~5.5wt% of the additional 1.5~2.0wt% of raw material, is uniformly mixed,
Obtain mixture；By the mixture, mechanical pressing, drying are warming up in tunnel oven under the conditions of 120~150MPa again
1500~1550 DEG C, 3~6h is to get high temperature corundum-mullite refractory slab for heat preservation.
Embodiment 2
A kind of high temperature corundum-mullite refractory slab and preparation method thereof.With the grain size of 40.0~43.0wt% be less than 5mm and
The grain size of plate diamond spar particle, 24.0~27.0wt% more than or equal to 3mm is less than 3mm and the plate diamond spar more than or equal to 1mm
Particle, 8.0~11.0wt% grain size be less than 1mm and more than or equal to the plate diamond spar particle of 0.5mm, 14.0~17.0wt%
α-the Al of plate diamond spar fine powder of the grain size less than or equal to 0.074mm, 9.0~10.0wt%2O3The silicon of fine powder and 0.9~1.0wt%
Powder is raw material, the polyvinyl alcohol of the Ludox and 4.5~5.0wt% of the additional 2.0~3.5wt% of raw material, is uniformly mixed, obtains
To mixture；By the mixture, mechanical pressing, drying are warming up to 1600 in tunnel oven under the conditions of 120~150MPa again
~1650 DEG C, 3~6h is to get high temperature corundum-mullite refractory slab for heat preservation.
Embodiment 3
A kind of high temperature corundum-mullite refractory slab and preparation method thereof.With the grain size of 31.0~34.0wt% be less than 5mm and
The grain size of plate diamond spar particle, 15.0~18.0wt% more than or equal to 3mm is less than 3mm and the plate diamond spar more than or equal to 1mm
Particle, 17.0~20.0wt% grain size be less than 1mm and more than or equal to 0.5mm plate diamond spar particle, 23.0~26.0wt%
Grain size less than or equal to the plate diamond spar fine powder of 0.074mm, the α-Al of 6.0~7.0wt%2O3Fine powder and 0.6~0.7wt%'s
Silica flour is raw material, the Ludox of the zirconium colloidal sol and 3.5~4.0wt% of the additional 2.0~2.5wt% of raw material, is uniformly mixed, obtains
To mixture；By the mixture, mechanical pressing, drying are warming up to 1550 in tunnel oven under the conditions of 120~150MPa again
~1600 DEG C, 3~6h is to get high temperature corundum-mullite refractory slab for heat preservation.
Embodiment 4
A kind of high temperature corundum-mullite refractory slab and preparation method thereof.With the grain size of 37.0~40.0wt% be less than 5mm and
The grain size of plate diamond spar particle, 21.0~24.0wt% more than or equal to 3mm is less than 3mm and the plate diamond spar more than or equal to 1mm
Particle, 11.0~14.0wt% grain size be less than 1mm and more than or equal to 0.5mm plate diamond spar particle, 17.0~20.0wt%
Grain size less than or equal to the plate diamond spar fine powder of 0.074mm, the α-Al of 7.0~8.0wt%2O3Fine powder and 0.8~0.9wt%'s
Silica flour is raw material, the polyvinyl alcohol of the Ludox and 3.0~3.5wt% of the additional 3.0~3.5wt% of raw material, is uniformly mixed,
Obtain mixture；By the mixture, mechanical pressing, drying are warming up in tunnel oven under the conditions of 120~150MPa again
1550~1600 DEG C, 3~6h is to get high temperature corundum-mullite refractory slab for heat preservation.
Embodiment 5
A kind of high temperature corundum-mullite refractory slab and preparation method thereof.With the grain size of 34.0~37.0wt% be less than 5mm and
The grain size of plate diamond spar particle, 18.0~21.0wt% more than or equal to 3mm is less than 3mm and the plate diamond spar more than or equal to 1mm
Particle, 14.0~17.0wt% grain size be less than 1mm and more than or equal to 0.5mm plate diamond spar particle, 20.0~23.0wt%
Grain size less than or equal to the plate diamond spar fine powder of 0.074mm, the α-Al of 8.0~9.0wt%2O3Fine powder and 0.7~0.8wt%'s
Silica flour is raw material, and the zirconium colloidal sol of the additional 1.5~2.0wt% of raw material and the Ludox of 4.5~5.0wt% are uniformly mixed, and are obtained
To mixture；By the mixture, mechanical pressing, drying are warming up to 1600 in tunnel oven under the conditions of 120~150MPa again
~1650 DEG C, 3~6h is to get high temperature corundum-mullite refractory slab for heat preservation.
Present embodiment has the positive effect that compared with prior art：
1, present embodiment is with plate diamond spar, α-Al2O3With simple substance silica flour be primary raw material, through mechanical pressing and
Firing has the advantages that simple for process low with cost of material to get to high temperature corundum-mullite refractory slab in tunnel oven.
2, high temperature made from present embodiment is had excellent performance wide with use scope with corundum-mullite refractory slab, can be used
In on 1700 DEG C or more of intermittent shuttle kiln, and its requirement frequently used is disclosure satisfy that, to pollution-free, the city that fires product
Field foreground is considerable.
Therefore, present embodiment has the characteristics that environmental-friendly and simple for process；Prepared high temperature with corundum-not
Come that stone refractory slab good thermal shock stability, mechanical strength are big and temperature in use is high and use scope is wide.
Claims (6)
1. a kind of high temperature preparation method of corundum-mullite refractory slab, it is characterised in that small with the grain size of 28.0~43.0wt%
In 5mm and it is more than or equal to plate of the grain size of the plate diamond spar particle of 3mm, 12.0~27.0wt% less than 3mm and more than or equal to 1mm
Shape corundum in granules, 8.0~23.0wt% grain size be less than 1mm and more than or equal to 0.5mm plate diamond spar particle, 14.0~
α-the Al of plate diamond spar fine powder of the grain size of 29.0wt% less than or equal to 0.074mm, 5.0~10.0wt%2O3Fine powder and 0.5~
The silica flour of 1.0wt% is raw material, and the bonding agent of the additional 5.5~8.5wt% of raw material is uniformly mixed, obtains mixture；Again will
Mixture mechanical pressing under the conditions of 120~150MPa, it is dry, 1500~1650 DEG C are warming up in tunnel oven, heat preservation 3
~6h is to get high temperature corundum-mullite refractory slab.
2. the high temperature according to claim 1 preparation method of corundum-mullite refractory slab, it is characterised in that the plate is rigid
Beautiful chemical composition is：Al2O3Content >=99.6wt%；SiO2Content≤0.09wt%；Fe2O3Content≤0.03wt%.
3. the high temperature according to claim 1 preparation method of corundum-mullite refractory slab, it is characterised in that the α-Al2O3
The grain size of fine powder is less than 0.088mm；α-the Al2O3The Al of fine powder2O3Content >=99.5wt%.
4. the high temperature according to claim 1 preparation method of corundum-mullite refractory slab, it is characterised in that the silica flour
Grain size is less than 0.044mm；Si contents >=98.0wt% of the silica flour.
5. the high temperature according to claim 1 preparation method of corundum-mullite refractory slab, it is characterised in that the bonding agent
For arbitrary two kinds of mixture in zirconium colloidal sol, Ludox and polyvinyl alcohol.
6. a kind of high temperature corundum-mullite refractory slab, it is characterised in that the high temperature is according to right with corundum-mullite refractory slab
It is required that any one of 1~5 high temperature with the high temperature prepared by the preparation method of corundum-mullite refractory slab with corundum-not come
Stone refractory slab.
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| CN109293351A (en) * | 2018-09-28 | 2019-02-01 | 广东山摩新材料科技有限公司 | A kind of dichroite-mullite refractory slab and preparation method thereof |
| CN109851337A (en) * | 2019-01-08 | 2019-06-07 | 广东山摩新材料科技有限公司 | A kind of high temperature dichroite-mullite refractory slab and preparation method thereof |
| CN111825438A (en) * | 2020-07-27 | 2020-10-27 | 武汉科技大学 | Mullite corundum zirconia slab and preparation method thereof |
| CN111892387A (en) * | 2020-08-11 | 2020-11-06 | 中钢南京环境工程技术研究院有限公司 | Preparation method of large-size thin high-temperature corundum-mullite slab |
| CN112521133A (en) * | 2020-12-18 | 2021-03-19 | 洛阳索莱特材料科技有限公司 | Preparation method of ultrahigh-temperature corundum-mullite ceramic product |
| CN112608137A (en) * | 2020-12-18 | 2021-04-06 | 上海电气燃气轮机有限公司 | Mullite fiber reinforced ceramic heat insulation tile |
| CN113149618A (en) * | 2021-05-08 | 2021-07-23 | 湖南聚福精密陶瓷有限责任公司 | Ceramic burning bearing plate and processing technology thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109293351A (en) * | 2018-09-28 | 2019-02-01 | 广东山摩新材料科技有限公司 | A kind of dichroite-mullite refractory slab and preparation method thereof |
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| CN111825438A (en) * | 2020-07-27 | 2020-10-27 | 武汉科技大学 | Mullite corundum zirconia slab and preparation method thereof |
| CN111892387A (en) * | 2020-08-11 | 2020-11-06 | 中钢南京环境工程技术研究院有限公司 | Preparation method of large-size thin high-temperature corundum-mullite slab |
| CN112521133A (en) * | 2020-12-18 | 2021-03-19 | 洛阳索莱特材料科技有限公司 | Preparation method of ultrahigh-temperature corundum-mullite ceramic product |
| CN112608137A (en) * | 2020-12-18 | 2021-04-06 | 上海电气燃气轮机有限公司 | Mullite fiber reinforced ceramic heat insulation tile |
| CN113149618A (en) * | 2021-05-08 | 2021-07-23 | 湖南聚福精密陶瓷有限责任公司 | Ceramic burning bearing plate and processing technology thereof |
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Application publication date: 20180720 |