CN109400124A - A kind of corundum gas permeable material and preparation method thereof - Google Patents
A kind of corundum gas permeable material and preparation method thereof Download PDFInfo
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- CN109400124A CN109400124A CN201811267698.8A CN201811267698A CN109400124A CN 109400124 A CN109400124 A CN 109400124A CN 201811267698 A CN201811267698 A CN 201811267698A CN 109400124 A CN109400124 A CN 109400124A
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Abstract
The present invention relates to a kind of corundum gas permeable materials and preparation method thereof.Its technical solution is: by corundum fine powder, α-Al2O3Micro mist, aluminium hydroxide, aluminum fluoride, additive, foaming agent, foam stabilizer, water-reducing agent and aluminous cement mixing, add water, stirring, moulding by casting solidifies, dry, it is heat-treated 5~7 hours in 1500~1700 DEG C, broken, screening obtains particulate material A of the granularity less than 0.25mm and granularity as the particulate material B of 0.25~1mm.Again by α-Al2O3Micro mist, aluminum fluoride, thickener and water mixing, stirring obtain slurry.Then corundum in granules, particulate material A, particulate material B, water-reducing agent, aluminous cement and slurry are mixed, moulding by casting, is solidified, it is dry, it is heat-treated 5~7 hours at 1400~1600 DEG C, obtains corundum gas permeable material.Production cost of the present invention is low, and prepared corundum gas permeable material has the characteristics that high temperature break resistant intensity is big, gas permeability is stable, scour resistance is excellent and long service life.
Description
Technical field
The invention belongs to gas permeable material technical fields.More particularly to a kind of corundum gas permeable material and preparation method thereof.
Background technique
Furnace outer refining technology is refinery practice part important in steelmaking process, the temperature of adjustable composition of steel and molten steel
Degree.And air brick is the critical function element that this technique can smoothly be implemented, the reliability and completeness to external refining rise
Vital effect.The material of corresponding gas permeable material includes clay matter, corundum, spinel etc., gas permeable material
Type mainly includes diffusion-type, the straight-through forms such as pass and slit-type.In actual use, gas permeable material is primarily present
The problems such as gas performance is unstable, erosion-resisting characteristics is poor low with elevated temperature strength.The presence of the above problem, affects steel smelting procedure
Normal rhythm, reduce working efficiency.
In the technology of preparing of existing gas permeable material, though can be promoted by way of introducing additive gas permeable material sintering and
Improve bond strength, but the low melting point liquid phase formed reduces the mechanical strength of gas permeable material；Though tissue can be enhanced by introducing micro mist
Compact structureization and corrosion resistance is improved, but will affect the gas permeability of product, and micro mist is unevenly distributed can reduce product knot instead
The stability of structure and performance.
Summary of the invention
The present invention is directed to overcome defect of the existing technology, it is therefore an objective to it is ventilative to provide a kind of corundum that production cost is low
The preparation method of material, with the high temperature break resistant intensity of the corundum gas permeable material of this method preparation is big, gas permeability is stable, antiscour
It has excellent performance and long service life.
To achieve the above object, the technical solution adopted by the present invention comprises the concrete steps that:
The first step, by the corundum fine powder of 40~60wt%, the α-Al of 10~20wt%2O3The hydrogen-oxygen of micro mist, 10~20wt%
Change aluminium, the aluminum fluoride of 1~10wt%, the additive of 1~5wt%, the foaming agent of 1~5wt%, the foam stabilizer of 1~5wt%, 0.1
The aluminous cement mixing of the water-reducing agent and 1~5wt% of~1wt%, obtains mixture；Again the additional mixture 10~
The water of 20wt%, stirs evenly, moulding by casting, solidifies 10~20 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 12~24 hours under the conditions of 90~120 DEG C, then at 1500~
It is heat-treated 5~7 hours under the conditions of 1700 DEG C, obtains Preburning material；Then the Preburning material is crushed, sieves, obtains granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, the α-Al by 20~40wt%2O3Micro mist, the aluminum fluoride of 1~10wt%, 1~10wt%
The mixing of the water of thickener and 50~70wt%, stirs evenly, obtains slurry.
4th step, by the corundum in granules of 60~80wt%, the particulate material A of 1~10wt%, 10~20wt% particulate material B,
The slurry of the water-reducing agent of 0.1~1wt%, the aluminous cement of 1~5wt% and 1~10wt% mixes, and stirs evenly, pours
Injection forming solidifies 10~20 hours, 12~24 hours dry under the conditions of 90~120 DEG C, then in 1400~1600 DEG C of items
It is heat-treated 5~7 hours under part, obtains corundum gas permeable material.
The corundum fine powder is plate diamond spar fine powder or is white fused alumina fine powder, the Al of the corundum fine powder2O3Content is greater than
99wt%；The granularity of the corundum fine powder is less than 0.088mm.
The corundum in granules is plate diamond spar particle or is white fused alumina particle, the Al of the corundum in granules2O3Content is greater than
99wt%；The granularity of the corundum in granules is 1~3mm.
α-the Al2O3The Al of micro mist2O3Content is greater than 99wt%；α-the Al2O3The granularity of micro mist is less than 0.01mm.
The Al (OH) of the aluminium hydroxide3Content is greater than 99wt%；The granularity of the aluminium hydroxide is less than 0.045mm.
The AlF of the aluminum fluoride3Content be greater than 99wt%；The granularity of the aluminum fluoride is less than 0.045mm.
The additive is zinc oxide or is titanium dioxide, and the purity of the additive is greater than 99wt%；The additive
Granularity be less than 0.088mm.
The foaming agent is neopelex or is lauryl sodium sulfate；The purity of the foaming agent is greater than
98wt%.
The foam stabilizer is sodium sulfate of polyethenoxy ether of fatty alcohol or is sodium carboxymethylcellulose.
The water-reducing agent is calgon or is sodium tripolyphosphate；The purity of the water-reducing agent is greater than 98wt%.
The aluminous cement: Al2O3Content be greater than 65wt%；SiO2Content be less than 0.5wt%；Fe2O3Content
Less than 0.3wt%.
The thickener is polyvinylpyrrolidone or is sodium alginate.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art:
(1) present invention utilizes corundum fine powder, aluminium hydroxide and α-Al2O3The different materials such as micro mist are under condition of different temperatures
Reactivity, corundum gas permeable material obtained is the aplitic texture particulate material based on corundum, have multistage through-hole structure and
High-intensitive feature.The present invention uses prefabricated slurry, can ensure that the micro mist in prefabricated slurry is distributed evenly in corundum in granules, pre-
Between the particulate material A of system and prefabricated particulate material B, fine grain combination was both formd, institutional framework is also had adjusted.Therefore, obtained rigid
Beautiful matter gas permeable material has biggish strength at normal temperature.
(2) present invention avoids the introducing of impurity phase due to controlling the high-temperature reaction process between different characteristics raw material, and
Stable fine grain mosaic texture can be formed between prefabricated particulate material A, prefabricated particulate material B and corundum in granules, therefore, system
The corundum gas permeable material high temperature break resistant intensity with higher obtained.
(3) present invention utilizes additive, foaming agent, thickener etc. in the compound action and different material of different phase
Between grain graininess difference, form different scale between prefabricated particulate material A, prefabricated particulate material B and corundum in granules
Through-hole structure is ensuring that corundum gas permeable material mechanical strength under condition of different temperatures is higher simultaneously, is imparting corundum
The stable gas permeability of gas permeable material.
(4) preparation process substep is controlled, was both adjusted according to the structure and performance characteristics of corundum gas permeable material by the present invention
The growth of crystal grain and occurrence status, and formation and the connected state of hole are controlled, it realizes to corundum gas permeable material knot
The ingenious control of structure and performance.
The raw material sources that the present invention uses are extensive, simple production process, and the production cost of made product is low.
The performance of corundum gas permeable material prepared by the present invention is through detecting: bulk density is 2.5~2.9g/cm3；Apparent pore
Rate is 23~31%；Strength at normal temperature is greater than 7MPa；High temperature (1400 DEG C) flexural strength is greater than 7MPa.Therefore, the present invention is raw
Produce corundum gas permeable material at low cost, prepared have high temperature break resistant intensity is big, gas permeability is stable, scour resistance is excellent and
The characteristics of long service life.
Specific embodiment
The invention will be further described With reference to embodiment, not to the limitation of its protection scope.
It is first that material particular diameter Unify legislation involved in present embodiment is as follows to avoid repeating, in embodiment not
It repeats again:
The Al of the corundum fine powder2O3Content is greater than 99wt%；The granularity of the corundum fine powder is less than 0.088mm.
The Al of the corundum in granules2O3Content is greater than 99wt%；The granularity of the corundum in granules is 1~3mm.
α-the Al2O3The Al of micro mist2O3Content is greater than 99wt%；α-the Al2O3The granularity of micro mist is less than 0.01mm.
The Al (OH) of the aluminium hydroxide3Content is greater than 99wt%；The granularity of the aluminium hydroxide is less than 0.045mm.
The AlF of the aluminum fluoride3Content be greater than 99wt%；The granularity of the aluminum fluoride is less than 0.045mm.
The purity of the additive is greater than 99wt%；The granularity of the additive is less than 0.088mm.
The purity of the foaming agent is greater than 98wt%.
The purity of the water-reducing agent is greater than 98wt%.
The aluminous cement: Al2O3Content be greater than 65wt%；SiO2Content be less than 0.5wt%；Fe2O3Content
Less than 0.3wt%.
Embodiment 1
A kind of corundum gas permeable material and preparation method thereof.Preparation method described in the present embodiment is:
The first step, by the corundum fine powder of 40~50wt%, the α-Al of 10~15wt%2O3The hydrogen-oxygen of micro mist, 15~20wt%
Change aluminium, the aluminum fluoride of 5~10wt%, the additive of 1~5wt%, the foaming agent of 1~5wt%, the foam stabilizer of 1~5wt%, 0.1
The aluminous cement mixing of the water-reducing agent and 1~5wt% of~1wt%, obtains mixture；Again the additional mixture 15~
The water of 20wt%, stirs evenly, moulding by casting, solidifies 10~15 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 12~16 hours under the conditions of 100~120 DEG C, then at 1500~
It is heat-treated 5~7 hours under the conditions of 1600 DEG C, obtains Preburning material；Then the Preburning material is crushed, sieves, obtains granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, the α-Al by 20~30wt%2O3Micro mist, the aluminum fluoride of 5~10wt%, 1~5wt%
The mixing of the water of thickener and 60~70wt%, stirs evenly, obtains slurry.
4th step, by the corundum in granules of 60~70wt%, the particulate material A of 5~10wt%, 10~20wt% particulate material B,
The slurry of the water-reducing agent of 0.1~1wt%, the aluminous cement of 1~5wt% and 1~5wt% mixes, and stirs evenly, and is poured
Molding solidifies 15~20 hours, 12~16 hours dry under the conditions of 90~120 DEG C, then in 1450~1550 DEG C of conditions
Lower heat treatment 5~7 hours, obtains corundum gas permeable material.
In the present embodiment:
The corundum fine powder is plate diamond spar fine powder；
The corundum in granules is plate diamond spar particle；
The additive is titanium dioxide；
The foaming agent is neopelex；
The foam stabilizer is sodium sulfate of polyethenoxy ether of fatty alcohol；
The water-reducing agent is calgon；
The thickener is sodium alginate.
The performance of corundum gas permeable material manufactured in the present embodiment is through detecting: bulk density is 2.5~2.8g/cm3；Aobvious gas
Porosity is 23~30%；Strength at normal temperature is greater than 7MPa；High temperature (1400 DEG C) flexural strength is greater than 7MPa.
Embodiment 2
A kind of corundum gas permeable material and preparation method thereof.Preparation method described in the present embodiment is:
The first step, by the corundum fine powder of 50~60wt%, the α-Al of 15~20wt%2O3The hydrogen-oxygen of micro mist, 10~15wt%
Change aluminium, the aluminum fluoride of 5~10wt%, the additive of 1~5wt%, the foaming agent of 1~5wt%, the foam stabilizer of 1~5wt%, 0.1
The aluminous cement mixing of the water-reducing agent and 1~5wt% of~1wt%, obtains mixture；Again the additional mixture 10~
The water of 15wt%, stirs evenly, moulding by casting, solidifies 10~15 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 19~24 hours under the conditions of 90~110 DEG C, then at 1550~
It is heat-treated 5~7 hours under the conditions of 1650 DEG C, obtains Preburning material；It is crushed with by the Preburning material, sieves, obtain granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, the α-Al by 30~40wt%2O3Micro mist, the aluminum fluoride of 1~5wt%, 5~10wt%
The mixing of the water of thickener and 50~60wt%, stirs evenly, obtains slurry.
4th step, by the corundum in granules of 70~80wt%, the particulate material A of 1~5wt%, 10~20wt% particulate material B,
The slurry of the water-reducing agent of 0.1~1wt%, the aluminous cement of 1~5wt% and 5~10wt% mixes, and stirs evenly, pours
Injection forming solidifies 10~15 hours, 15~18 hours dry under the conditions of 90~120 DEG C, then in 1500~1600 DEG C of items
It is heat-treated 5~7 hours under part, obtains corundum gas permeable material.
In the present embodiment:
The corundum fine powder is plate diamond spar fine powder；
The corundum in granules is plate diamond spar particle；
The additive is titanium dioxide；
The foaming agent is neopelex；
The foam stabilizer is sodium carboxymethylcellulose；
The water-reducing agent is sodium tripolyphosphate；
The thickener is polyvinylpyrrolidone.
The performance of corundum gas permeable material manufactured in the present embodiment is through detecting: bulk density is 2.6~2.9g/cm3；Aobvious gas
Porosity is 25~31%；Strength at normal temperature is greater than 8MPa；High temperature (1400 DEG C) flexural strength is greater than 7MPa.
Embodiment 3
A kind of corundum gas permeable material and preparation method thereof.Preparation method described in the present embodiment is:
The first step, by the corundum fine powder of 50~60wt%, the α-Al of 10~15wt%2O3The hydrogen-oxygen of micro mist, 10~15wt%
Change aluminium, the aluminum fluoride of 1~5wt%, the additive of 1~5wt%, the foaming agent of 1~5wt%, the foam stabilizer of 1~5wt%, 0.1
The aluminous cement mixing of the water-reducing agent and 1~5wt% of~1wt%, obtains mixture；Again the additional mixture 15~
The water of 20wt%, stirs evenly, moulding by casting, solidifies 15~20 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 15~18 hours under the conditions of 100~120 DEG C, then at 1600~
It is heat-treated 5~7 hours under the conditions of 1700 DEG C, obtains Preburning material；Then the Preburning material is crushed, sieves, obtains granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, the α-Al by 20~30wt%2O3Micro mist, the aluminum fluoride of 5~10wt%, 1~5wt%
The mixing of the water of thickener and 60~70wt%, stirs evenly, obtains slurry.
4th step, by the corundum in granules of 60~70wt%, the particulate material A of 1~5wt%, 10~20wt% particulate material B,
The slurry of the water-reducing agent of 0.1~1wt%, the aluminous cement of 1~5wt% and 5~10wt% mixes, and stirs evenly, pours
Injection forming solidifies 15~20 hours, 17~24 hours dry under the conditions of 90~120 DEG C, then in 1400~1500 DEG C of items
It is heat-treated 5~7 hours under part, obtains corundum gas permeable material.
In the present embodiment:
The corundum fine powder is white fused alumina fine powder；
The corundum in granules is white fused alumina particle；
The additive is zinc oxide；
The foaming agent is lauryl sodium sulfate；
The foam stabilizer is sodium carboxymethylcellulose；
The water-reducing agent is sodium tripolyphosphate；
The thickener is polyvinylpyrrolidone.
The performance of corundum gas permeable material manufactured in the present embodiment is through detecting: bulk density is 2.6~2.9g/cm3；Aobvious gas
Porosity is 25~30%；Strength at normal temperature is greater than 8MPa；High temperature (1400 DEG C) flexural strength is greater than 8MPa.
Embodiment 4
A kind of corundum gas permeable material and preparation method thereof.Preparation method described in the present embodiment is:
The first step, by the corundum fine powder of 40~50wt%, the α-Al of 15~20wt%2O3The hydrogen-oxygen of micro mist, 15~20wt%
Change aluminium, the aluminum fluoride of 5~10wt%, the additive of 1~5wt%, the foaming agent of 1~5wt%, the foam stabilizer of 1~5wt%, 0.1
The aluminous cement mixing of the water-reducing agent and 1~5wt% of~1wt%, obtains mixture；Again the additional mixture 10~
The water of 15wt%, stirs evenly, moulding by casting, solidifies 10~15 hours, the green body after being solidified.
Second step, by the green body after the solidification dry 17~20 hours under the conditions of 90~110 DEG C, then at 1550~
It is heat-treated 5~7 hours under the conditions of 1650 DEG C, obtains Preburning material；Then the Preburning material is crushed, sieves, obtains granularity and be less than
The particulate material A and granularity of 0.25mm is the particulate material B of 0.25~1mm.
Third step, the α-Al by 30~40wt%2O3Micro mist, the aluminum fluoride of 1~5wt%, 5~10wt%
The mixing of the water of thickener and 50~60wt%, stirs evenly, obtains slurry.
4th step, by the corundum in granules of 70~80wt%, the particulate material A of 1~5wt%, 10~20wt% particulate material B,
The slurry of the water-reducing agent of 0.1~1wt%, the aluminous cement of 1~5wt% and 1~5wt% mixes, and stirs evenly, and is poured
Molding solidifies 10~15 hours, 15~18 hours dry under the conditions of 90~120 DEG C, then in 1400~1500 DEG C of conditions
Lower heat treatment 5~7 hours, obtains corundum gas permeable material.
In the present embodiment:
The corundum fine powder is white fused alumina fine powder；
The corundum in granules is white fused alumina particle；
The additive is zinc oxide；
The foaming agent is neopelex；
The foam stabilizer is sodium sulfate of polyethenoxy ether of fatty alcohol；
The water-reducing agent is calgon；
The thickener is polyvinylpyrrolidone.
The performance of corundum gas permeable material manufactured in the present embodiment is through detecting: bulk density is 2.6~2.9g/cm3；Aobvious gas
Porosity is 23~29%；Strength at normal temperature is greater than 7MPa；High temperature (1400 DEG C) flexural strength is greater than 9MPa.
Present embodiment has following good effect compared with prior art:
(1) present embodiment utilizes corundum fine powder, aluminium hydroxide and α-Al2O3The different materials such as micro mist are in not equality of temperature
Reactivity under the conditions of degree, corundum gas permeable material obtained are the aplitic texture particulate materials based on corundum, are had multistage logical
Pore structure and high-intensitive feature.Present embodiment uses prefabricated slurry, can ensure that micro mist in prefabricated slurry equably
It is distributed between corundum in granules, prefabricated particulate material A and prefabricated particulate material B, had both formd fine grain combination, and also had adjusted knot of tissue
Structure.Therefore, corundum gas permeable material obtained has biggish strength at normal temperature.
(2) present embodiment avoids impurity phase due to the high-temperature reaction process between controlling different characteristics raw material
Introducing, and stable fine grain can be formed between prefabricated particulate material A, prefabricated particulate material B and corundum in granules and inlay knot
Structure, therefore, corundum gas permeable material high temperature break resistant intensity with higher obtained.
(3) present embodiment utilizes additive, foaming agent, thickener etc. in the compound action of different phase, and
Grain graininess difference between different material forms not between prefabricated particulate material A, prefabricated particulate material B and corundum in granules
With the through-hole structure of scale, ensuring that corundum gas permeable material mechanical strength under condition of different temperatures is higher simultaneously, is assigning
Corundum gas permeable material stable gas permeability.
(4) present embodiment controls preparation process substep according to the structure and performance characteristics of corundum gas permeable material
System, had not only had adjusted growth and the occurrence status of crystal grain, but also control formation and the connected state of hole, had realized saturating to corundum
The ingenious control of gas material structure and performance.
The raw material sources that present embodiment uses are extensive, and the production cost of simple production process, made product is low.
The performance of the corundum gas permeable material of present embodiment preparation is through detecting: bulk density is 2.5~2.9g/
cm3；Apparent porosity is 23~31%；Strength at normal temperature is greater than 7MPa；High temperature (1400 DEG C) flexural strength is greater than 7MPa.
Therefore, present embodiment production cost is low, and prepared corundum gas permeable material has high temperature break resistant intensity
Greatly, the characteristics of gas permeability is stable, scour resistance is excellent and long service life.
Claims (11)
1. a kind of preparation method of corundum gas permeable material, it is characterised in that the preparation method is:
The first step, by the corundum fine powder of 40~60wt%, the α-Al of 10~20wt%2O3The hydroxide of micro mist, 10~20wt%
Aluminium, the aluminum fluoride of 1~10wt%, the additive of 1~5wt%, the foaming agent of 1~5wt%, the foam stabilizer of 1~5wt%, 0.1~
The aluminous cement mixing of the water-reducing agent and 1~5wt% of 1wt%, obtains mixture；Additional 10~the 20wt% of mixture again
Water, stir evenly, moulding by casting, solidify 10~20 hours, the green body after being solidified；
Second step dries the green body after the solidification 12~24 hours under the conditions of 90~120 DEG C, then at 1500~1700 DEG C
Under the conditions of be heat-treated 5~7 hours, obtain Preburning material；Then the Preburning material is crushed, is sieved, obtain granularity less than 0.25mm
Particulate material A and granularity be 0.25~1mm particulate material B；
Third step, the α-Al by 20~40wt%2O3Micro mist, 1~10wt% the aluminum fluoride, 1~10wt% thickening
The mixing of the water of agent and 50~70wt%, stirs evenly, obtains slurry；
4th step, by the corundum in granules of 60~80wt%, the particulate material A of 1~10wt%, the particulate material B of 10~20wt%, 0.1
The slurry of the water-reducing agent of~1wt%, the aluminous cement of 1~5wt% and 1~10wt% mixes, and stirs evenly, pours into
Type solidifies 10~20 hours, 12~24 hours dry under the conditions of 90~120 DEG C, then under the conditions of 1400~1600 DEG C
Heat treatment 5~7 hours, obtains corundum gas permeable material；
The corundum fine powder is plate diamond spar fine powder or is white fused alumina fine powder, the Al of the corundum fine powder2O3Content is greater than
99wt%；The granularity of the corundum fine powder is less than 0.088mm；
The corundum in granules is plate diamond spar particle or is white fused alumina particle, the Al of the corundum in granules2O3Content is greater than
99wt%；The granularity of the corundum in granules is 1~3mm.
2. the preparation method of corundum gas permeable material according to claim 1, it is characterised in that the α-Al2O3Micro mist
Al2O3Content is greater than 99wt%；α-the Al2O3The granularity of micro mist is less than 0.01mm.
3. the preparation method of corundum gas permeable material according to claim 1, it is characterised in that the Al of the aluminium hydroxide
(OH)3Content is greater than 99wt%；The granularity of the aluminium hydroxide is less than 0.045mm.
4. the preparation method of corundum gas permeable material according to claim 1, it is characterised in that the AlF of the aluminum fluoride3Contain
Amount is greater than 99wt%；The granularity of the aluminum fluoride is less than 0.045mm.
5. the preparation method of corundum gas permeable material according to claim 1, it is characterised in that the additive is zinc oxide
Or be titanium dioxide, the purity of the additive is greater than 99wt%；The granularity of the additive is less than 0.088mm.
6. the preparation method of corundum gas permeable material according to claim 1, it is characterised in that the foaming agent is dodecane
Base benzene sulfonic acid sodium salt is lauryl sodium sulfate, and the purity of the foaming agent is greater than 98wt%.
7. the preparation method of corundum gas permeable material according to claim 1, it is characterised in that the foam stabilizer is fatty alcohol
Polyethenoxy ether sodium sulfate is sodium carboxymethylcellulose.
8. the preparation method of corundum gas permeable material according to claim 1, it is characterised in that the water-reducing agent is six inclined phosphorus
Sour sodium is sodium tripolyphosphate, and the purity of the water-reducing agent is greater than 98wt%.
9. the preparation method of corundum gas permeable material according to claim 1, it is characterised in that the aluminous cement: Al2O3
Content be greater than 65wt%；SiO2Content be less than 0.5wt%；Fe2O3Content be less than 0.3wt%.
10. the preparation method of corundum gas permeable material according to claim 1, it is characterised in that the thickener is polyethylene
Pyrrolidones is sodium alginate.
11. a kind of corundum gas permeable material, it is characterised in that the corundum gas permeable material be according to claim 1~10 in
Corundum gas permeable material prepared by the preparation method of any one corundum gas permeable material.
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| CN101381241A (en) * | 2008-10-16 | 2009-03-11 | 武汉科技大学 | Porous breathable refractory materials for upper nozzle and production method thereof |
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| CN103242051A (en) * | 2013-05-30 | 2013-08-14 | 武汉科技大学 | Lightweight corundum-mullite castable and preparation method thereof |
| CN105645979A (en) * | 2016-01-15 | 2016-06-08 | 浙江自立高温科技有限公司 | Steel ladle air brick and manufacturing method thereof |
| CN105859309A (en) * | 2016-03-31 | 2016-08-17 | 武汉科技大学 | Dispersive air brick and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381241A (en) * | 2008-10-16 | 2009-03-11 | 武汉科技大学 | Porous breathable refractory materials for upper nozzle and production method thereof |
| CN102659426A (en) * | 2012-04-20 | 2012-09-12 | 武汉科技大学 | Micro-porous high-strength anti-corrosion corundum refractory aggregate and preparation method thereof |
| CN103242051A (en) * | 2013-05-30 | 2013-08-14 | 武汉科技大学 | Lightweight corundum-mullite castable and preparation method thereof |
| CN105645979A (en) * | 2016-01-15 | 2016-06-08 | 浙江自立高温科技有限公司 | Steel ladle air brick and manufacturing method thereof |
| CN105859309A (en) * | 2016-03-31 | 2016-08-17 | 武汉科技大学 | Dispersive air brick and preparation method thereof |
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