CN109851337A - A kind of high temperature dichroite-mullite refractory slab and preparation method thereof - Google Patents
A kind of high temperature dichroite-mullite refractory slab and preparation method thereof Download PDFInfo
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Abstract
A kind of high temperature dichroite-mullite refractory slab and preparation method thereof of the present invention.Its technical solution is: being first less than 5mm with the partial size of 28.0~43.0wt% and is more than or equal to the mullite particle of 2mm, the partial size of 12.0~27.0wt% is less than 3mm and is more than or equal to the cordierite particle of 1mm, the partial size of 11.0~26.0wt% is less than 1mm and is more than or equal to the cordierite particle of 0.5mm, 8.0 the kaolin fine powder of~18.0wt%, 6.0 the talcum fine powder of~11.0wt%, the Reactive alumina of 2.0~7.0wt% and the boron oxide of 0.5~1.0wt% are raw material, the bonding agent of additional 5.5~8.0wt% of raw material, it is uniformly mixed, it is formed through 150~200MPa, it is dry, it is placed in tunnel oven again, 3~6h is kept the temperature under the conditions of 1410~1440 DEG C To get high temperature dichroite-mullite refractory slab.Environmental-friendly and simple process of the invention；Prepared high temperature dichroite-mullite refractory slab good thermal shock stability, high mechanical strength and use temperature range are wide.
Description
Technical field
The invention belongs to high temperature refractory slab technical fields.More particularly to a kind of high temperature dichroite-mullite refractory slab and its
Preparation method.
Background technique
Dedicated kiln furnitures of the refractory slab as porcelain piece in support firing are always a kind of important auxiliary material in ceramic industry.
As modern kiln industry and the development of heat power engineering, the use temperature range of kiln are further widened, firing atmosphere complexity
It improves, frequency of use rises, and kiln faces more stringent performance requirement with refractory slab therewith.
Cordierite has thermal expansion coefficient small by (2.3 × 10-6/ DEG C) and thermal shock resistance it is good the advantages that, be widely used as high-quality resistance to
Fiery material, electronic package material, catalyst carrier, foamed ceramics and aeronautical material etc..But since cordierite toughness is poor, loading
Softening temperature is low, and synthesis temperature narrow range limits the performance of its excellent performance.And it is mullite fusing point higher (1870 DEG C), anti-
High temperature creep is good, intensity is high and thermal expansion coefficient relatively small (5.3 × 10-6/ DEG C), therefore, research preparation is high-intensitive, low swollen
Swollen, good heat stability dichroite-mullite diphase ceramic material is one of the effective way for realizing cordierite industrial application.
In the technical foundation of research dichroite-mullite complex phase ceramic, the preparation for being referred to refractory slab is received significant attention.
Currently, have the technology for preparing high temperature dichroite-mullite refractory slab refractory slab, such as " dichroite-mullite refractory slab and
Preparation method " (CN103936406A) patented technology, discloses a kind of technology for preparing dichroite-mullite refractory slab, the skill
Refractory slab, main phase is made with mullite and clay aggregate, with matrix such as talcum powder, kyanite, andalusite, magnesium powder and aluminium oxide in art
Group becomes cordierite and mullite, is lower than 1350 DEG C using temperature；Such as a kind of " gangue synthesis of dichroite-mullite complex phase
The method of material " (CN101508563A) patented technology discloses a kind of gangue, magnesia carbon brick, sliding plate brick etc. as primary raw material
The technology of dichroite-mullite complex phase material is prepared, main phase composition in dichroite-mullite complex phase material made from the technology
For cordierite and mullite, but eutectic phase content is higher and contains carbon residue, is lower than 1200 DEG C using temperature, and with reproducibility gas
Body generates.
Summary of the invention
The present invention is directed to overcome prior art defect, it is therefore an objective to provide a kind of environmental-friendly, simple process high temperature violet
Green stone-mullite refractory slab preparation method.The thermal shock resistance of the dichroite-mullite refractory slab of the high temperature prepared by the method
Good, high mechanical strength and use temperature range are wide.
To achieve the above object, the technical scheme adopted by the invention is that: first be less than with the partial size of 28.0~43.0wt%
The partial size of 5mm and mullite particle, 12.0~27.0wt% more than or equal to 2mm is less than 3mm and is more than or equal to the cordierite of 1mm
Particle, 11.0~26.0wt% partial size be less than 1mm and more than or equal to the cordierite particle of 0.5mm, the height of 8.0~18.0wt%
Ridge soil fine powder, the talcum fine powder of 6.0~11.0wt%, the Reactive alumina of 2.0~7.0wt% and 0.5~1.0wt%
Boron oxide is raw material, the bonding agent of the additional 5.5~8.0wt% of raw material, is uniformly mixed, obtains mixture.It again will be described mixed
Material is closed to form under the conditions of 150~200MPa, it is dry, it is subsequently placed in tunnel oven, keep the temperature 3 under the conditions of 1410~1440 DEG C~
6h is to get high temperature dichroite-mullite refractory slab.
The chemical component of the mullite are as follows: Al2O3Content >=55.4wt%, SiO2Content >=42.4wt%, Fe2O3Content
≤ 0.35wt%.
The chemical component of the cordierite are as follows: Al2O3Content >=33.5wt%, SiO2Content >=50.1wt%, content of MgO
>=12.5wt%, Fe2O3Content≤0.09wt%.
The chemical component of the kaolin fine powder are as follows: Al2O3Content >=42.5wt%, SiO2Content >=52.7wt%, Na2O
+K2O content≤1.9wt%, Fe2O3Content≤0.17wt%；Partial size≤0.088mm of the kaolin fine powder.
The chemical component of the talcum fine powder are as follows: SiO2Content >=63.4%, content of MgO >=30.9%；The talcum is thin
Partial size≤0.074mm of powder.
The partial size of the Reactive alumina is less than 0.045mm；The Al of Reactive alumina2O3Content >=
99.6wt%.
The partial size of the boron oxide is less than 0.02mm；State the B of boron oxide2O3Content >=98.0wt%.
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 using mullite, cordierite, kaolin and activated alumina as primary raw material, through pressure forming and in tunnel
It is burnt under the conditions of 1410~1440 DEG C in road kiln, obtains high temperature dichroite-mullite refractory slab, there is simple process and production
Advantage at low cost.
2, the bulk density of dichroite-mullite refractory slab prepared by the present invention is up to 2.50Kg/cm3, compressive resistance is reachable
120MPa, permanent line change less than 0.05%；Can be on 1700 DEG C or more of intermittent shuttle kiln, and can satisfy its frequency
Numerous requirement used, to firing, product is pollution-free, alternative similar imported product.
Therefore, the present invention has the characteristics that environmental-friendly and simple process；Prepared high temperature dichroite-mullite canopy
Plate good thermal shock stability, high mechanical strength and use temperature range are wide.
Specific embodiment
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 related technical parameter Unify legislation involved by present embodiment is as follows to avoid repeating, implement
It is repeated no more in example:
The chemical component of the mullite are as follows: Al2O3Content >=55.4wt%, SiO2Content >=42.4wt%, Fe2O3Content
≤ 0.35wt%.
The chemical component of the cordierite are as follows: Al2O3Content >=33.5wt%, SiO2Content >=50.1wt%, content of MgO
>=12.5wt%, Fe2O3Content≤0.09wt%.
The chemical component of the kaolin fine powder are as follows: Al2O3Content >=42.5wt%, SiO2Content >=52.7wt%, Na2O
+K2O content≤1.9wt%, Fe2O3Content≤0.17wt%；Partial size≤0.088mm of the kaolin fine powder.
The chemical component of the talcum fine powder are as follows: SiO2Content >=63.4%, content of MgO >=30.9%；The talcum is thin
Partial size≤0.074mm of powder.
The partial size of the Reactive alumina is less than 0.045mm；The Al of Reactive alumina2O3Content >=
99.6wt%.
The partial size of the boron oxide is less than 0.02mm；State the B of boron oxide2O3Content >=98.0wt%.
Embodiment 1
A kind of high temperature dichroite-mullite refractory slab and preparation method thereof.First it is less than with the partial size of 28.0~31.0wt%
The partial size of 5mm and mullite particle, 12.0~15.0wt% more than or equal to 2mm is less than 3mm and is more than or equal to the cordierite of 1mm
Particle, 23.0~26.0wt% partial size be less than 1mm and more than or equal to the cordierite particle of 0.5mm, 16.0~18.0wt%
Kaolin fine powder, the talcum fine powder of 10.0~11.0wt%, the Reactive alumina of 2.0~3.0wt% and 0.5~
The boron oxide of 0.6wt% is raw material, and the bonding agent of the additional 5.5~6.0wt% of raw material is uniformly mixed, obtains mixture.Again
The mixture is formed under the conditions of 150~200MPa, it is dry, it is subsequently placed in tunnel oven, in 1410~1440 DEG C of conditions
3~6h of lower heat preservation is to get high temperature dichroite-mullite refractory slab.
The bonding agent is the mixture of zirconium colloidal sol and polyvinyl alcohol.
Embodiment 2
A kind of high temperature dichroite-mullite refractory slab and preparation method thereof.First it is less than with the partial size of 40.0~43.0wt%
The partial size of 5mm and mullite particle, 24.0~27.0wt% more than or equal to 2mm is less than 3mm and is more than or equal to the cordierite of 1mm
Particle, 11.0~14.0wt% partial size be less than 1mm and more than or equal to the cordierite particle of 0.5mm, the height of 8.0~10.0wt%
Ridge soil fine powder, the talcum fine powder of 6.0~7.0wt%, the Reactive alumina of 6.0~7.0wt% and 0.9~1.0wt%
Boron oxide is raw material, the bonding agent of the additional 6.0~6.5wt% of raw material, is uniformly mixed, obtains mixture.It again will be described mixed
Material is closed to form under the conditions of 150~200MPa, it is dry, it is subsequently placed in tunnel oven, keep the temperature 3 under the conditions of 1410~1440 DEG C~
6h is to get high temperature dichroite-mullite refractory slab.
The bonding agent is the mixture of silica solution and polyvinyl alcohol.
Embodiment 3
A kind of high temperature dichroite-mullite refractory slab and preparation method thereof.First it is less than with the partial size of 31.0~34.0wt%
The partial size of 5mm and mullite particle, 15.0~18.0wt% more than or equal to 2mm is less than 3mm and is more than or equal to the cordierite of 1mm
Particle, 20.0~23.0wt% partial size be less than 1mm and more than or equal to the cordierite particle of 0.5mm, 14.0~16.0wt%
Kaolin fine powder, the talcum fine powder of 9.0~10.0wt%, 3.0~4.0wt% Reactive alumina and 0.6~0.7wt%
Boron oxide be raw material, the bonding agent of the additional 6.5~7.0wt% of raw material, be uniformly mixed, obtain mixture.It again will be described
Mixture forms under the conditions of 150~200MPa, dry, is subsequently placed in tunnel oven, keeps the temperature 3 under the conditions of 1410~1440 DEG C
~6h is to get high temperature dichroite-mullite refractory slab.
The bonding agent is the mixture of zirconium colloidal sol and polyvinyl alcohol.
Embodiment 4
A kind of high temperature dichroite-mullite refractory slab and preparation method thereof.First it is less than with the partial size of 37.0~40.0wt%
The partial size of 5mm and mullite particle, 21.0~24.0wt% more than or equal to 2mm is less than 3mm and is more than or equal to the cordierite of 1mm
Particle, 14.0~17.0wt% partial size be less than 1mm and more than or equal to the cordierite particle of 0.5mm, 10.0~12.0wt%
Kaolin fine powder, the talcum fine powder of 7.0~8.0wt%, 4.0~5.0wt% Reactive alumina and 0.8~0.9wt%
Boron oxide be raw material, the bonding agent of the additional 7.0~7.5wt% of raw material, be uniformly mixed, obtain mixture.It again will be described
Mixture forms under the conditions of 150~200MPa, dry, is subsequently placed in tunnel oven, keeps the temperature 3 under the conditions of 1410~1440 DEG C
~6h is to get high temperature dichroite-mullite refractory slab.
The bonding agent is the mixture of zirconium colloidal sol and polyvinyl alcohol.
Embodiment 5
A kind of high temperature dichroite-mullite refractory slab and preparation method thereof.First it is less than with the partial size of 34.0~37.0wt%
The partial size of 5mm and mullite particle, 18.0~21.0wt% more than or equal to 2mm is less than 3mm and is more than or equal to the cordierite of 1mm
Particle, 17.0~20.0wt% partial size be less than 1mm and more than or equal to the cordierite particle of 0.5mm, 12.0~14.0wt%
Kaolin fine powder, the talcum fine powder of 8.0~9.0wt%, 5.0~6.0wt% Reactive alumina and 0.7~0.8wt%
Boron oxide be raw material, the bonding agent of the additional 7.5~8wt% of raw material, be uniformly mixed, obtain mixture.It again will be described mixed
Material is closed to form under the conditions of 150~200MPa, it is dry, it is subsequently placed in tunnel oven, keep the temperature 3 under the conditions of 1410~1440 DEG C~
6h is to get high temperature dichroite-mullite refractory slab.
The bonding agent is the mixture of silica solution and polyvinyl alcohol.
Present embodiment has the positive effect that compared with prior art:
1, present embodiment is using mullite, cordierite, kaolin and activated alumina as primary raw material, through pressure at
It type and is burnt under the conditions of 1410~1440 DEG C in tunnel oven, obtains high temperature dichroite-mullite refractory slab, there is technique letter
Single advantage low with production cost.
2, the bulk density of the dichroite-mullite refractory slab of present embodiment preparation is up to 2.50Kg/cm3, pressure resistance
Intensity changes up to 120MPa, permanent line less than 0.05%；Can be on 1700 DEG C or more of intermittent shuttle kiln, and it can
Meet its requirement frequently used, product is pollution-free to firing, alternative similar imported product.
Therefore, present embodiment has the characteristics that environmental-friendly and simple process；Prepared high temperature cordierite-
Mullite refractory slab good thermal shock stability, high mechanical strength and use temperature range are wide.
Claims (9)
1. a kind of high temperature preparation method of dichroite-mullite refractory slab, it is characterised in that first with the grain of 28.0~43.0wt%
Diameter is less than 5mm and the partial size of mullite particle, 12.0~27.0wt% more than or equal to 2mm is less than 3mm and more than or equal to 1mm's
Cordierite particle, 11.0~26.0wt% partial size be less than 1mm and more than or equal to 0.5mm cordierite particle, 8.0~
The kaolin fine powder of 18.0wt%, the talcum fine powder of 6.0~11.0wt%, 2.0~7.0wt% Reactive alumina and
The boron oxide of 0.5~1.0wt% is raw material, and the bonding agent of the additional 5.5~8.0wt% of raw material is uniformly mixed, is mixed
Material；The mixture is formed under the conditions of 150~200MPa again, it is dry, it is subsequently placed in tunnel oven, at 1410~1440 DEG C
Under the conditions of keep the temperature 3~6h to get high temperature dichroite-mullite refractory slab.
2. the high temperature according to claim 1 preparation method of dichroite-mullite refractory slab, it is characterised in that described not come
The chemical component of stone are as follows: Al2O3Content >=55.4wt%, SiO2Content >=42.4wt%, Fe2O3Content≤0.35wt%.
3. the high temperature according to claim 1 preparation method of dichroite-mullite refractory slab, it is characterised in that the violet is green
The chemical component of stone are as follows: Al2O3Content >=33.5wt%, SiO2Content >=50.1wt%, content of MgO >=12.5wt%, Fe2O3Contain
Amount≤0.09wt%.
4. the high temperature according to claim 1 preparation method of dichroite-mullite refractory slab, it is characterised in that the kaolinite
The chemical component of native fine powder are as follows: Al2O3Content >=42.5wt%, SiO2Content >=52.7wt%, Na2O+K2O content≤
1.9wt%, Fe2O3Content≤0.17wt%；Partial size≤0.088mm of the kaolin fine powder.
5. the high temperature according to claim 1 preparation method of dichroite-mullite refractory slab, it is characterised in that the talcum
The chemical component of fine powder are as follows: SiO2Content >=63.4%, content of MgO >=30.9%；The partial size of the talcum fine powder≤
0.074mm。
6. the high temperature according to claim 1 preparation method of dichroite-mullite refractory slab, it is characterised in that the activity
The partial size of alumina powder is less than 0.045mm；The Al of Reactive alumina2O3Content >=99.6wt%.
7. the high temperature according to claim 1 preparation method of dichroite-mullite refractory slab, it is characterised in that the oxidation
The partial size of boron is less than 0.02mm；State the B of boron oxide2O3Content >=98.0wt%.
8. the high temperature according to claim 1 preparation method of dichroite-mullite refractory slab, it is characterised in that the combination
Agent be the mixture of zirconium colloidal sol and polyvinyl alcohol or be silica solution and polyvinyl alcohol mixture.
9. a kind of high temperature dichroite-mullite refractory slab, it is characterised in that the high temperature is basis with dichroite-mullite refractory slab
High temperature prepared by preparation method of the high temperature described in any one of claim 1~8 with dichroite-mullite refractory slab is green with violet
Stone-mullite refractory slab.
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Cited By (4)
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|---|---|---|---|---|
| CN111875364A (en) * | 2020-07-27 | 2020-11-03 | 武汉科技大学 | Zircon reinforced cordierite mullite slab for medium and low temperature and preparation method thereof |
| CN111978077A (en) * | 2020-08-05 | 2020-11-24 | 河南好运祥耐材有限公司 | Cordierite-containing composite refractory material for dry quenching coke tank and bin body working lining |
| CN113716969A (en) * | 2021-08-31 | 2021-11-30 | 浙江锦诚新材料股份有限公司 | Mullica anti-skinning castable and preparation method of prefabricated part |
| CN115849887A (en) * | 2022-11-23 | 2023-03-28 | 宜兴市丁山耐火器材有限公司 | High-thermal-shock low-creep mullite-based high-temperature complex-phase material and preparation method thereof |
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| CN115849887B (en) * | 2022-11-23 | 2024-01-30 | 宜兴市丁山耐火器材有限公司 | Mullite-based high-temperature composite material with high thermal shock and low creep and preparation method thereof |
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