CN102489696A - Oxide and non-oxide composite tundish nozzle - Google Patents
Oxide and non-oxide composite tundish nozzle Download PDFInfo
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- CN102489696A CN102489696A CN2011104195293A CN201110419529A CN102489696A CN 102489696 A CN102489696 A CN 102489696A CN 2011104195293 A CN2011104195293 A CN 2011104195293A CN 201110419529 A CN201110419529 A CN 201110419529A CN 102489696 A CN102489696 A CN 102489696A
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Abstract
The invention belongs to the field of novel functional refractory materials for continuous casting, and provides an oxide and non-oxide composite tundish nozzle for continuous casting. A body of the tundish nozzle is made of aluminum-carbon materials, a bowl of the tundish nozzle is made of oxide and non-oxide composite materials, and materials for mixing transition between the bowl and the body are arranged between the bowl and the body. Main raw materials of the bowl include 65-80% of fused magnesia, 5-20% of non-oxide, 7-12% of graphite and 8-12% of phenolic resin. By adding the non-oxide, properly reducing the content of the graphite and making full use of the advantages of high melting point, low thermal expansion rate, fine thermal shock resistance and difficulty in being soaked by molten steel of the non-oxide, scouring and erosion resistance of the bowl of the tundish nozzle is improved during use.
Description
Affiliated technical field
The invention belongs to novel continuous casting functional fire resisting material field, a kind of continuous casting that provides is with the preparation method of the compound middle water-coating port of oxide-non-oxidized substance.
Background technology
Middle water-coating port is applied in the continuous casting tundish; Its major function is the fit clearance through water-coating port and integral column of sagger caput in the adjustment; Control opening of tundish and water, close and the steel of crystallizer stream, to guarantee molten steel the stablizing of liquid level stabilizing and continuous casting process in crystallizer.In the service condition of water-coating port very harsh, should bear the coal gas of high temperature baking, water the strong thermal shock at steel initial stage and acutely wash away, stand the erosion of molten steel again.
The water-coating port bulk material is mainly the aluminium carbonaceous at present; Middle in use water-coating port will stand thermal shock, and middle water-coating port must have certain thermal-shock resistance, problem such as can not occur bursting; Otherwise will cause the interruption of continuous casting, cause bigger economic loss to steel mill.Middle-ladle nozzle cover portion receives the molten steel erosion serious in the use in addition, and the quality of its anti-erosion, scour resistance is the decision key factor in its service life.Be the service life of water-coating port in improving, according to the difference of watering steel grade, bowl portion can adopt Al2O3-C matter, MgO-C matter or ZrO2-C material.
Water-coating port is a primary raw material with magnesia and graphite promptly with referring to that bowl portion adopts magnesium carbon material in the magnesium carbon, is the carbon combined fire-resistant material that bond is processed with organic matters such as phenolic resins.Because magnesia has the fusing point height, characteristics such as anti-molten steel aggressivity height in the magnesium material with carbon element; Graphite has low heat expansion, higher characteristics such as anti-slag corrosion property, and therefore this material has excellent thermal shock resistance and corrosion resistance etc., is widely used in using the continuous casting steel machine process.Along with the prolongation of casting time and the deterioration of casting condition, in use erosion quantity is big for common magnesium material with carbon element, corrodes excessively, is difficult to satisfy actual needs.And because the difference of thermal expansion between magnesium carbon and the aluminium carbon material, water-coating port in use bursts easily in causing, and therefore seeks a kind of low bulk that has, and the magnesium material with carbon element of high abrasion resistance has positive effect to the life-span of water-coating port in improving.
Summary of the invention
For solving the problems of the technologies described above, the object of the invention provides a kind of continuous casting with the compound middle water-coating port of oxide-non-oxidized substance.Water-coating port had preferable corrosion resistance, scour resistance and anti-thermal shock stability during this was compound, had been used for continuous casting steel, and particularly arranged when calcium treated steel, potassium steel long service life.
For accomplishing the foregoing invention purpose, the technical scheme that the present invention adopted is: a kind of continuous casting is with the compound middle water-coating port of oxide-non-oxidized substance, and middle water-coating port comprises bowl portion and body; Body is an alumina-carbon material; Said bowl portion is oxide-non-oxidized substance composite, below all is weight percentage, and it consists of: content of magnesia is greater than 97% fused magnesite 65-80%; A kind of or several 5-15% in the non-oxidized substances such as Sialon, A Long, magnesium A Long, silicon nitride, ferro-silicon nitride, boron nitride; Additive metal silica flour, aluminium powder 1-3%, carbon content adds bond phenolic resins 8-12% greater than 97% graphite 7-12%.
It is primary raw material that the present invention adopts fused magnesite, graphite; And a kind of in the non-oxidized substance such as Sialon, A Long, magnesium A Long, silicon nitride, ferro-silicon nitride, boron nitride or several; Phenolic resins is the whole compound middle water-coating port of bond preparation, has splendid antiscour, anti-molten steel aggressivity and anti-thermal shock stability.Fused magnesite self just has the erosion that good anticalcium is handled steel and potassium steel; Introduce non-oxidized substance again; Good characteristic such as utilize that the non-oxidized substance thermal coefficient of expansion is low, thermal conductivity is high, intensity is high and molten steel is nonwetting, improved greatly compound in service life of water-coating port.
The specific embodiment
Water-coating port during a kind of oxide-non-oxidized substance is compound comprises aluminium carbonaceous body and oxide-non-oxidized substance composite bowl portion, and said bowl portion employing oxide-non-oxidized substance composite below all is weight percentage, and it consists of:
Content of magnesia is greater than 97% fused magnesite 65-80%;
A kind of in the non-oxidized substances such as Sialon, A Long, magnesium A Long, silicon nitride, ferro-silicon nitride, boron nitride or several, 5-20%;
Carbon content is greater than 97% graphite 7-12%;
Metallic silicon power, aluminium powder 1-3%;
Add bond, phenolic resins 8-12%.
Its manufacturing approach is: adopting fused magnesite, graphite is primary raw material; Introduce a kind of in the non-oxidized substances such as Sialon, A Long, magnesium A Long, silicon nitride, ferro-silicon nitride, boron nitride or several; Employing phenolic resins is bond, through granulation, dry back and this bluk recombination of aluminium carbonaceous, behind isostatic compaction; Under nonoxidizing atmosphere, under 900-1100 ℃ temperature, burn till, promptly can be made into required whole compound middle water-coating port.
Embodiment 1,
Bowl portion: fused magnesite 80%, graphite 8%, Sialon 10%, metallic silicon power 2% adds phenolic resins 10%.After granulation, drying,, behind isostatic compaction, under nonoxidizing atmosphere, under 900 ℃ temperature, burn till with this bluk recombination of aluminium carbonaceous; The compound middle water-coating port of processing uses 25 stoves in certain steel mill, uses 16 hours, in use; Control stream is good; After using, the situation of closing is fine, does not exist to drop down steel, stream steel phenomenon.
Embodiment 2,
Bowl portion: fused magnesite 65%, graphite 12%, Sialon 20%, metallic silicon power 3% adds phenolic resins 10%.After granulation, drying,, behind isostatic compaction, under nonoxidizing atmosphere, under 1100 ℃ temperature, burn till with this bluk recombination of aluminium carbonaceous; The compound middle water-coating port of processing uses 12 stoves in certain steel mill, uses 12 hours, in use; Control stream is good; After using, the situation of closing is fine, does not exist to drop down steel, stream steel phenomenon.
Embodiment 3,
Bowl portion: fused magnesite 70%, graphite 8%, Sialon 10%, A Long 10%, and metallic aluminium powder 2% adds phenolic resins 10%.After granulation, drying,, behind isostatic compaction, under nonoxidizing atmosphere, under 1000 ℃ temperature, burn till with this bluk recombination of aluminium carbonaceous; The compound middle water-coating port of processing uses 40 stoves in certain steel mill, uses 22 hours, in use; Control stream is good; After using, the situation of closing is fine, does not exist to drop down steel, stream steel phenomenon.
Embodiment 4,
Bowl portion: fused magnesite 75%, graphite 10%, silicon nitride+Sialon 13%, metallic silicon power 1%, aluminium powder 1% adds phenolic resins 12%.After granulation, drying,, behind isostatic compaction, under nonoxidizing atmosphere, under 900 ℃ temperature, burn till with this bluk recombination of aluminium carbonaceous; The compound middle water-coating port of processing uses 91 stoves in certain steel mill, uses 39 hours, in use; Control stream is good; After using, the situation of closing is fine, does not exist to drop down steel, stream steel phenomenon.
Embodiment 5,
Bowl portion: fused magnesite 78%, graphite 10%, boron nitride 10%, metallic silicon power 2% adds phenolic resins 10%.After granulation, drying,, behind isostatic compaction, under nonoxidizing atmosphere, under 1050 ℃ temperature, burn till with this bluk recombination of aluminium carbonaceous; The compound middle water-coating port of processing uses 25 stoves in certain steel mill, uses 16 hours, in use; Control stream is good; After using, the situation of closing is fine, does not exist to drop down steel, stream steel phenomenon.
Embodiment 6,
Bowl portion: fused magnesite 75%, graphite 8%, ferro-silicon nitride+A Long 15%, and metallic silicon power 2% adds phenolic resins 8%.After granulation, drying,, behind isostatic compaction, under nonoxidizing atmosphere, under 1000 ℃ temperature, burn till with this bluk recombination of aluminium carbonaceous; The compound middle water-coating port of processing uses 35 stoves in certain steel mill, uses 22 hours, in use; Control stream is good; After using, the situation of closing is fine, does not exist to drop down steel, stream steel phenomenon.
Claims (7)
1. a continuous casting is with the compound middle water-coating port of oxide-non-oxidized substance; It is characterized in that: said middle-ladle nozzle cover portion is oxide-non-oxidized substance composite, and body is an alumina-carbon material, and bowl portion is a primary raw material with fused magnesite, graphite; Introduce non-oxidized substance; Add little additive and add bond phenolic resins, through granulation, dry back and this bluk recombination of aluminium carbonaceous, behind isostatic compaction; Under nonoxidizing atmosphere, under 900-1100 ℃ temperature, burn till, promptly can be made into required compound middle water-coating port.
2. middle-ladle nozzle cover according to claim 1 portion material; It is characterized in that raw materials used percentage by weight consists of the fused magnesite of 65-80%, the graphite of 7-12%, the non-oxidized substance of 5-20%, the additive of 1-3% in the described middle-ladle nozzle cover portion material, bond is the phenolic resins of 8-12%.
3. middle-ladle nozzle cover according to claim 1 portion material is characterized in that the content of fused magnesite in the described middle-ladle nozzle cover portion material is: MgO >=97%.
4. middle-ladle nozzle cover according to claim 1 portion material, it is characterized in that described in the water-coating port material content of crystalline flake graphite be: carbon content >=97%.
5. middle-ladle nozzle cover according to claim 1 portion material, it is characterized in that in the described middle-ladle nozzle cover portion material non-oxidized substance be in Sialon, A Long, magnesium A Long, silicon nitride, ferro-silicon nitride, the boron nitride one or more.
6. middle-ladle nozzle cover according to claim 1 portion material is characterized in that additive in the described middle-ladle nozzle cover portion material is one or both in metallic silicon power, the metallic aluminium powder.
7. middle-ladle nozzle cover according to claim 1 portion material is characterized in that the bond in the described middle-ladle nozzle cover portion material is a thermosetting phenolic resin, its carbon residue >=40%, and solid content >=75%, viscosity is 600-1000cps (25 ℃).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104195293A CN102489696A (en) | 2011-12-15 | 2011-12-15 | Oxide and non-oxide composite tundish nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104195293A CN102489696A (en) | 2011-12-15 | 2011-12-15 | Oxide and non-oxide composite tundish nozzle |
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| CN102489696A true CN102489696A (en) | 2012-06-13 |
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| CN2011104195293A Pending CN102489696A (en) | 2011-12-15 | 2011-12-15 | Oxide and non-oxide composite tundish nozzle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910904A (en) * | 2012-10-29 | 2013-02-06 | 北京利尔高温材料股份有限公司 | Composite material containing nitride and submerged nozzle applying composite material |
| CN103992123A (en) * | 2014-04-30 | 2014-08-20 | 江苏泰瑞耐火有限公司 | Brushing-resistant submerged-nozzle inner wall for continuously casting high-manganese high-oxygen steel |
| CN104478455A (en) * | 2014-12-24 | 2015-04-01 | 辽宁中镁控股股份有限公司 | Low-carbonmagnesia carbon brick with non-oxidereinforcing and toughening structure and preparation method of low-carbonmagnesia carbon brick |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10146655A (en) * | 1996-11-18 | 1998-06-02 | Shinagawa Refract Co Ltd | Nozzle for continuously casting steel |
| CN101096311A (en) * | 2006-06-28 | 2008-01-02 | 宝山钢铁股份有限公司 | Immersion type water gap noumenon material containing calcium oxide |
| CN101298099A (en) * | 2007-04-30 | 2008-11-05 | 李涛 | Method for preparing ultra-low-carbon steel entry nozzle |
| CN101693821A (en) * | 2009-10-16 | 2010-04-14 | 江苏苏嘉集团新材料有限公司 | Boron modified phenolic resin binder for refractory materials |
| CN101704100A (en) * | 2009-12-09 | 2010-05-12 | 山东东耐高温材料有限公司 | Tundish breathable water inlet used for metal continuous casting plate blank and preparation method thereof |
| CN101722302A (en) * | 2009-12-24 | 2010-06-09 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of magnesium-carbon composite monolithic stopper rod for continuous casting |
-
2011
- 2011-12-15 CN CN2011104195293A patent/CN102489696A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10146655A (en) * | 1996-11-18 | 1998-06-02 | Shinagawa Refract Co Ltd | Nozzle for continuously casting steel |
| CN101096311A (en) * | 2006-06-28 | 2008-01-02 | 宝山钢铁股份有限公司 | Immersion type water gap noumenon material containing calcium oxide |
| CN101298099A (en) * | 2007-04-30 | 2008-11-05 | 李涛 | Method for preparing ultra-low-carbon steel entry nozzle |
| CN101693821A (en) * | 2009-10-16 | 2010-04-14 | 江苏苏嘉集团新材料有限公司 | Boron modified phenolic resin binder for refractory materials |
| CN101704100A (en) * | 2009-12-09 | 2010-05-12 | 山东东耐高温材料有限公司 | Tundish breathable water inlet used for metal continuous casting plate blank and preparation method thereof |
| CN101722302A (en) * | 2009-12-24 | 2010-06-09 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of magnesium-carbon composite monolithic stopper rod for continuous casting |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910904A (en) * | 2012-10-29 | 2013-02-06 | 北京利尔高温材料股份有限公司 | Composite material containing nitride and submerged nozzle applying composite material |
| CN103992123A (en) * | 2014-04-30 | 2014-08-20 | 江苏泰瑞耐火有限公司 | Brushing-resistant submerged-nozzle inner wall for continuously casting high-manganese high-oxygen steel |
| CN104478455A (en) * | 2014-12-24 | 2015-04-01 | 辽宁中镁控股股份有限公司 | Low-carbonmagnesia carbon brick with non-oxidereinforcing and toughening structure and preparation method of low-carbonmagnesia carbon brick |
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Application publication date: 20120613 |
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