CN100410204C - Tundish permeable brick and its preparing process - Google Patents
Tundish permeable brick and its preparing process Download PDFInfo
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- CN100410204C CN100410204C CNB2005100189423A CN200510018942A CN100410204C CN 100410204 C CN100410204 C CN 100410204C CN B2005100189423 A CNB2005100189423 A CN B2005100189423A CN 200510018942 A CN200510018942 A CN 200510018942A CN 100410204 C CN100410204 C CN 100410204C
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- mullite
- corundum
- permeable brick
- gas permeable
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Abstract
The present invention relates to a Al2O3-SiO2 bakie fire-resistant material with a ventilation property and a method thereof. The present invention has the technical scheme that the raw materials of 76 to 85% of corundum, 5 to 20% of mullite, 2 to 10% of binding agents and 1 to 5% of silicon miropowder are mixed according to the proportion content by weight, and 0.05 to 0.20% of dispersing agents, 7 to 9% of water and 5 to 20% of xerogel powder and 1 to 5% of AlF3 are added in the raw materials. The raw materials are stirred for 6 to 8 minutes to be shaped in a casting mode, and the raw materials are dried under the condition of 110 DEG C *24h and are fired under the condition of 1200 to 1400 DEG C * 3h, wherein the xerogel powder is gelatin prepared from collosol which is the unreacted body of gelatin mullite, and the xerogel powder is dried under the condition of 110 DEG C *24h. Because mullite crystal whisker generated by the xerogel powder and a catalyst is added, the strength of the present invention is improved, and micropores can be formed to improve the ventilation property of the present invention. The present invention has the advantages of high durability, good properties of heat vibration and slag erosion resistance, good property of molten steel flushing resistance, no environment pollution, etc.
Description
Technical field
The invention belongs to Al
2O
3-SiO
2The fire resistant materials technical field.Relate in particular to a kind of Al
2O
3-SiO
2Tundish breathable refractory materials and preparation method thereof.
Background technology
Stir by the gas permeable brick Argon in molten steel that is installed in the tundish bottom, make composition and temperature even, can significantly remove non-metallic inclusion in the molten steel, molecule and reduction [O] content, molten steel is played cleaning action.
Select in the material of gas permeable material, generally popular both at home and abroad is magnesia and corundum matter two classes.In use, because of periclasite and wustite formation continuous solid solution, so magnesia gas permeable material has resistivity preferably to the basic slag that contains ferric oxide and calcium oxide, but magnesia thermal expansivity is big, Young's modulus is high, thermal shock resistance is poor, and slag permeates to the periclasite intercrystalline in use, and then causes its structure spalling.By contrast, corundum matter gas permeable brick has characteristics such as good high-temperature performance and anti-thermal shock stability, but pure corundum matter porous plug in use erosion-resisting characteristics is poor, flake-off piece phenomenon is serious.
For further improving corundum matter gas permeable material anti-scour property, adopt more and in matrix, add Cr
2O
3The micro mist measure.The employing fused corundom is main raw material (ZL 95110026.2), adds Cr simultaneously
2O
3The micro mist sintering is made, Cr
2O
3Form the aluminium chromium solid solution with corundum fine powder, then form the glassy phase that contains chromium with other impurity, be the filling of isolated island shape between the chromium corundum crystal, this full-bodied chromium glass that contains stops the infiltration of slag highly beneficial relatively, but too Zhi Mi weave construction makes the thermal shock resistance deterioration, and Cr
2O
3At high temperature volatile, harmful to environment.
Be the anti-erosion of seeking gas permeable material and the overall equilbrium of thermal shock resistance, adopted and in matrix, added spinel (ZL94118264.9), cooperate SiO
2Raw material (spy opens flat 10-251739), adding Al
2O
3ZrO
2Be raw material (spy opens flat 10-280029), add zirconium mullite fine powder (spy opens flat 9-52168), with Al
2O
3ZrO
2Raw material and MgO micro mist add (spy opens flat 9-268051) simultaneously, make spinel, mullite, zirconium mullite constitute the matrix part of porous plug.In corundum matter aggregate, add mullite or original position generation mullite (Nobuyuki Mimure, Hironobu Toritani and Tatsuo Kawakami.GasPermeable Brick for the Refining in Steel Ladles[A] .UNITE ' 89 Congress[C], Vol.1, (1989): 442-452), can improve the thermal shock resistance of material, but because SiO
2Introducing its is reduced in life-span.VladimirV.Primachenko etc. (Vladimir V.Primachenko Valery V.Martynenko and Vladimir A.Ustichenko.TheManufacturing Experience and Application in the Ukraine Mullite-corrundom Purging Plugs for theBlowing of Steel in the Ladles[A] .UNITECR ' 2001 Congress[C], (2001): 490-493) studied the mullite bonded corundum and burnt till gas permeable brick, utilized the mullite characteristics littler to improve spalling than the corundum coefficient of expansion.
Though corundum-mullite matter gas permeable material has permeability preferably, and physical and chemical performance in some aspects also can well adapt to the environment for use at tundish, because the ventilative mode of its diffuse type structure, intensity is lower.
Summary of the invention
Task of the present invention provide a kind of have good anti-thermal shock, slag corrosion resistance, scour resistance, environmentally safe, reinforced effects is good, the intensity that can improve fire-resistant ventilative mould material, can improve tundish gas permeable brick of permeability and preparation method thereof simultaneously.
For realizing above-mentioned task, the technical solution adopted in the present invention is: percentage composition mixes the raw material of 76～85% corundum, 5～20% mullites, 2～10% wedding agents, 1～5% silicon powder by weight, adds 0.05～0.20% dispersion agent, 7～9% water, 5～20% dry gel powders, 1～5%AlF
3, stirred 6～8 minutes, casting, through 110 ℃ * 24h (annotate: being described as of " xxx ℃ * xx hour " " under xxx ℃ of condition xx hour ", down with) drying, 1200～1400 ℃ * 3h burns till.
Wherein: described dispersion agent is that tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 are mixing in 2: 1 by weight; Described dry gel powder is the prepared gel of sol-gel mullite precursor, dries under 110 ℃ * 24h condition; Described feed particles grating is that corundum is that 2～0.15mm, mullite are that 1～0.088mm, wedding agent are that≤10 μ m, silicon powder are≤1 μ m.
The Al of the corundum of described raw material
2O
3The Al of content 〉=95%, mullite
2O
3The SiO of content 〉=65%, silicon powder
2Content 〉=88%.
Described wedding agent or be Alphabond, ρ-Al
2O
3, a kind of in the alumina gel powder, magnalium gel powder or more than one, the Al of wedding agent
2O
3Content 〉=70%.
It is main raw material that the present invention adopts corundum and mullite, the selective oxidation Al binding agent, form and the adjustment grain composition by feed proportioning optimization, the corundum-mullite matter gas permeable brick of manufacturing has high durability and good anti-thermal shock, slag corrosion resistance and advantages such as anti-molten steel scouring performance and environmentally safe.The dry gel powder of introducing cooperates certain catalyzer, and the mullite crystal whisker that is generated can further improve intensity, forms little pore and improves permeability.
Embodiment
The preparation method of a kind of tundish corundum-mullite of embodiment matter gas permeable brick is that percentage composition is with Al by weight
2O
3The plate diamond spar of content 〉=99.8% is 77～83%, Al
2O
3The mullite of content 〉=71% is 10～15%, Al
2O
3ρ-the Al of content 〉=74.5%
2O
3Wedding agent is 3～6%, SiO
2The raw material of the silicon powder 1～3% of content 〉=95% mixes, and adds the dispersion agent, dry gel powder 11%～14% of 7.8% water, 0.1～0 15%, 3～5% AlF by the raw material weight percentage composition of said ratio
3, stir casting after 6～7 minutes, through 110 ℃ * 24h drying, 1200 ℃ * 3h burns till then.Dry gel powder is the prepared gel of sol-gel mullite precursor, dries under 110 ℃ * 24h condition.
The grain composition of each component: corundum: 2～0.15mm, mullite 1～0.088mm, ρ-Al
2O
3Wedding agent is≤10 μ m, silicon powder≤1 μ m.
It surveys physical and chemical index: apparent porosity is 20%, 1200 ℃ * 3h of 110 ℃ * 24h 27%; Volume density is 110 ℃ * 24h 2.5g/cm
3, 1200 ℃ * 3h 2.5g/cm
3Compressive strength is 110 ℃ * 24h 13MPa, 1200 ℃ * 3h 16MPa; Strength at normal temperature is 110 ℃ * 24h 4.8MPa, 1200 ℃ * 3h 4.9MPa; The line velocity of variation is that 1200 ℃ * 3h burns back 0.10%; The normal temperature Gas permeability is 110 ℃ * 24h, 109 milli dyne, 1200 ℃ * 3h, 277 milli dyne, 1500 ℃ * 3h, 318 milli dyne.
Comparative example adopts (with weight percentage): Al
2O
3The plate diamond spar of content 〉=99.8% is 70～76%, Al
2O
3The mullite of content 〉=71% is 16～21%, Al
2O
3ρ-the Al of content 〉=74.5%
2O
3Wedding agent is 3～6%, SiO
2The raw material of the silicon powder 1～3% of content 〉=95% mixes.Add 7% water, 0.1～0.15% dispersion agent, stir casting after 6～7 minutes, through 110 ℃ * 24h drying, 〉=1200 ℃ * 3h burns till then.
The grain composition of each component: corundum: 2～0.15mm, mullite 1～0.088mm, wedding agent ρ-Al
2O
3Be≤10 μ m, silicon powder≤1 μ m.
It surveys physical and chemical index: apparent porosity is 28%, 1500 ℃ * 3h of 110 ℃ * 24h 30%; Volume density is 110 ℃ * 24h2.6g/cm
3, 1500 ℃ * 3h 2.7g/cm
3Compressive strength is 110 ℃ * 24h 14MPa, 1500 ℃ * 3h 21MPa; Strength at normal temperature is 110 ℃ * 24h 2.7MPa, 1500 ℃ * 3h 5.3MPa; The line velocity of variation is that 1500 ℃ * 3h burns back-0.36%: the normal temperature Gas permeability is 110 ℃ * 24h, 91 milli dyne, 1200 ℃ * 3h, 140 milli dyne, 1500 ℃ * 3h, 154 milli dyne.
Claims (4)
1. the preparation method of a tundish gas permeable brick, it is characterized in that percentage composition adds 0.05～0.20% dispersion agent, 7～9% water, 5～20% dry gel powders, 1～5%AlF with the raw material mixing of 76～85% corundum, 5～20% mullites, 2～10% wedding agents, 1～5% silicon powder by weight
3, stirred 6～8 minutes, casting, through 110 ℃ * 24h drying, 1200～1400 ℃ * 3h burns till;
Described dispersion agent is that tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 are mixing in 2: 1 by weight;
Described dry gel powder is the prepared gel of sol-gel mullite precursor, dries under 110 ℃ * 24h condition;
Described feed particles grating is that corundum is that 2～0.15mm, mullite are that 1～0.088mm, wedding agent are that≤10 μ m, silicon powder are≤1 μ m;
The Al of described wedding agent
2O
3Content 〉=70%.
2. the preparation method of tundish gas permeable brick according to claim 1 is characterized in that the Al of described corundum
2O
3The Al of content 〉=95%, mullite
2O
3The SiO of content 〉=65%, silicon powder
2Content 〉=88%.
3. the preparation method of tundish gas permeable brick according to claim 1 and 2 is characterized in that described wedding agent is Alphabond, ρ-Al
2O
3, in the alumina gel powder, magnalium gel powder one or more.
4. according to the prepared tundish gas permeable brick of preparation method of each described tundish gas permeable brick in the claim 1～3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100189423A CN100410204C (en) | 2005-06-17 | 2005-06-17 | Tundish permeable brick and its preparing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100189423A CN100410204C (en) | 2005-06-17 | 2005-06-17 | Tundish permeable brick and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1699267A CN1699267A (en) | 2005-11-23 |
| CN100410204C true CN100410204C (en) | 2008-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100189423A Expired - Fee Related CN100410204C (en) | 2005-06-17 | 2005-06-17 | Tundish permeable brick and its preparing process |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423414B (en) * | 2008-11-27 | 2011-09-21 | 中钢集团洛阳耐火材料研究院有限公司 | High temperature and creep resistance corundum-mullite load bearing board and preparation method thereof |
| CN102320845B (en) * | 2011-08-12 | 2013-06-05 | 武汉科技大学 | Al2O3-SiO2 tundish permeable brick and preparation method thereof |
| CN103553578B (en) * | 2013-10-23 | 2015-08-19 | 洛阳利尔耐火材料有限公司 | A kind of gel is in conjunction with easy fired gas permeable brick and preparation technology thereof |
| CN104326757B (en) * | 2014-10-20 | 2016-08-24 | 成都府天高温材料科技有限公司 | In-situ Mullite Whisker strengthens method and the mullite crystal whisker enhancing air brick of air brick |
| CN104446566B (en) * | 2014-12-16 | 2016-08-24 | 江苏苏嘉集团新材料有限公司 | Degasification sheet for jet refined metals liquid and preparation method thereof |
| CN104876620B (en) * | 2015-05-04 | 2016-08-24 | 昆山安泰美科金属材料有限公司 | A kind of method preparing poromeric material |
| CN105859309B (en) * | 2016-03-31 | 2018-10-09 | 武汉科技大学 | A kind of dispersive air brick and preparation method thereof |
| CN107188546B (en) * | 2017-05-27 | 2020-04-24 | 武汉科技大学 | High-air-permeability dispersive air brick and preparation method thereof |
| CN107382331A (en) * | 2017-06-28 | 2017-11-24 | 常州莱尚纺织品有限公司 | A kind of anti-slag type tundish paint |
| CN107746258B (en) * | 2017-10-31 | 2020-09-04 | 营口四通高温新材料科技有限公司 | Ultralow-linear-change baking-free air brick and preparation method and application thereof |
| CN109133987B (en) * | 2018-10-29 | 2021-09-24 | 成都府天高温材料科技有限公司 | Corundum-spinel breathable material and preparation method thereof |
| CN113651620B (en) * | 2021-08-13 | 2022-09-30 | 宜兴市海科窑炉工程有限公司 | Ceramic high-wear-resistance sealing refractory brick for ceramic heat exchanger and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19727649A1 (en) * | 1997-06-28 | 1999-01-14 | Didier Werke Ag | Ceramic composite body |
| CN1431067A (en) * | 2003-01-17 | 2003-07-23 | 鞍山市耘路耐火材料厂 | Air permeable upper downspout of pouring basket in continuous casting |
| CN1530193A (en) * | 2003-03-14 | 2004-09-22 | 上海宝湘耐火材料有限公司 | Manufacture of zirconium mullite runner for continuous casting bakie |
-
2005
- 2005-06-17 CN CNB2005100189423A patent/CN100410204C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19727649A1 (en) * | 1997-06-28 | 1999-01-14 | Didier Werke Ag | Ceramic composite body |
| CN1431067A (en) * | 2003-01-17 | 2003-07-23 | 鞍山市耘路耐火材料厂 | Air permeable upper downspout of pouring basket in continuous casting |
| CN1530193A (en) * | 2003-03-14 | 2004-09-22 | 上海宝湘耐火材料有限公司 | Manufacture of zirconium mullite runner for continuous casting bakie |
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| Publication number | Publication date |
|---|---|
| CN1699267A (en) | 2005-11-23 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shangyu Zili industrial new material Co., Ltd. Assignor: Wuhan University of Science and Technology Contract record no.: 2010330001219 Denomination of invention: Tundish permeable brick and its preparing process Granted publication date: 20080813 License type: Exclusive License Open date: 20051123 Record date: 20100630 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080813 Termination date: 20130617 |