CN1796025A - Long nozzle in composite structure free from prewarming - Google Patents
Long nozzle in composite structure free from prewarming Download PDFInfo
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- CN1796025A CN1796025A CN 200410060354 CN200410060354A CN1796025A CN 1796025 A CN1796025 A CN 1796025A CN 200410060354 CN200410060354 CN 200410060354 CN 200410060354 A CN200410060354 A CN 200410060354A CN 1796025 A CN1796025 A CN 1796025A
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- long nozzle
- exempting
- composite construction
- liner
- mgo
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Abstract
The present invention belongs to a functional refractory material for continuous casting process, and provides a non-preheating long sprue with composite structure. It includes an external layer made of Al2O3-C material and a lining which contains no carbon material and is combined on the inner wall of said external layer. Said lining material is formed from metal powder additive, three-component system Al2O3-MgO-TiO2 synthetic material with low expansion coefficient, sintered or electrofused spinel and corundum, in which the content of spinel and corundum is 25-70wt%, content of Al2O3-MgO-TiO2 synthetic material is 25-70 wt% and the content of metal powder is 2-10 wt%.
Description
Affiliated technical field
The invention belongs to the continuous casting functional refractory, relate generally to and a kind of molten steel is exempted from preheating composite construction long nozzle by what ladle imported tundish.
Background technology
Long nozzle is the important refractory material of continuous casting, is connected on the mouth of a river under the steel ladle sliding water gap mechanism during use, and molten steel is imported tundish, prevents that molten steel from splashing and secondary oxidation.Long nozzle service condition harshness: high-temperature molten steel flows directly into the mouth of a river under the normal temperature state, stands extremely strong thermal shock; After molten steel imported long nozzle by slide gate mechanism, steel stream had strong the washing away effect of deteriorating to the neck at the mouth of a river and tapping hole.Safe and reliable for guaranteeing long nozzle, on selecting, the long nozzle material at first to make product have fabulous thermal-shock resistance, and content of graphite is all higher, also will add the vitreous silica of low coefficient of dilatation sometimes.For making long nozzle have higher service life, do not wish that again content of graphite is too high and do not add quartz as far as possible, to improve washing away and deteriorating of the anti-molten steel in the mouth of a river, the two has certain contradiction on material mixture ratio is selected.So, in actual production, always the reliability of using is put in the first place, cause the service life of long nozzle and the submersed nozzle and integral column of sagger can not be synchronous, sometimes must long nozzle of replacing in a casting cycle.
Summary of the invention
The objective of the invention is to propose a kind of preheating composite construction long nozzle of exempting from, make it have the direct use of the preheating of exempting from and good thermal shock, anti-molten steel wash away, to the characteristics of not carburetting of molten steel.
The preheating composite construction long nozzle of exempting from that the present invention proposes has similar common Al
2O
3The skin of-C material and local or whole compound not carbonaceous material liner; Outer field Al
2O
3-C material proportioning and conventional aluminium carbon long nozzle are similar, and alumina raw material adopts electro-corundum or alundum, and the carbon raw material adopts crystalline flake graphite, suitably adds a spot of antioxidant SiC, B4C, metal Si powder etc., is bond with phenolic resins.
The not carbonaceous material of the long nozzle liner of composite construction of the present invention is by the metal powder additive and have low-expansion ternary system Al
2O
3-MgO-TiO
2Synthesis material, sintering or electric smelting spinelle, corundum are formed; Wherein, the addition 25～70wt% of spinelle, corundum raw material, Al
2O
3-MgO-TiO
2Addition 25～the 70wt% of synthesis material, the addition 2～10%wt% of metal powder.Metal powder can be selected aluminium powder, silica flour, alusil alloy powder, Al-Mg alloy powder etc. for use, and bond can be selected inorganic bonding agent for use, as aluminium dihydrogen phosphate, aluminium colloidal sol or aluminium Ludox, magnalium colloidal sol, also can select phenolic resins; The bond addition is 4～10% of an inner lining material gross weight.
When the long nozzle of preparation composite construction, isostatic compaction of liner and outer body, protective atmosphere heat treatment, heat treatment temperature is 1000～1400 ℃.
One of long nozzle inner lining material feature of this composite construction is not carbon containing, has the Al of ratio
2O
3The thermal conductivity that-C material is much lower, continuous casting open that high-temperature molten steel directly contacts with this liner when watering, and the heat conduction is than former Al
2O
3-C liner is much lower, thereby makes Al
2O
3The outer inner thermal stress of-C reduces greatly, has improved the external condition of thermal shock, and this carbon-free liner has played an effect that thermal resistance is disconnected.Simultaneously, this composite bed and Al
2O
3The difference of-C body on mechanical property, its interface can also play the effect that suppresses the crackle expansion.
Two of this inner lining material feature is that this inner lining material body material is magnesium aluminate spinel or corundum, and a kind of low-expansion ternary system Al
2O
3-MgO-TiO
2Synthesis material.Adjust charge ratio, can obtain having the lower coefficient of thermal expansion that is complementary with alumina-carbon material, thereby make inside and outside composite heat coupling, good combination is arranged in heat treatment and use.
Three of this inner lining material feature is because carbon containing not, and the reaction in-situ sintering in heat treatment and use again has good anti-molten steel erosion and deteriorates.
Ternary system Al in this inner lining material
2O
3-MgO-TiO
2Synthesis material is the pre-synthesis material of high temperature, and its compositing range is Al
2O
330～50%, MgO5～15%, TiO
235～55%, pre-synthesis temperature is 1500～1800 ℃.
Adopt the long nozzle of the present invention's preparation, have directly use of the preheating of exempting from, good thermal shock, anti-molten steel wash away, to characteristics such as not carburetting of molten steel.
Description of drawings
Accompanying drawing 1 is exempted from the schematic diagram of the long nozzle of preheating composite construction for the present invention.
Among the figure, 1, mouth of a river skin, 2, liner.
The specific embodiment
The prepared outer aluminium carbon batching of preheating long nozzle of exempting from is electric smelting diamantane 55%, sintering oxidation aluminium powder 14%, and crystalline flake graphite 25%, carborundum powder 5%, boron carbide 1%, bond phenolic resins is 10% of the batching gross weight; Carbon containing internal layer batching is not magnesium aluminate spinel 70%, Al
2O
3-MgO-TiO
2Synthesis material 27%, it consists of Al
2O
330%, MgO15%, TiO
255%; Alusil alloy powder 3%, aluminium Ludox (Al
2O
3Content 20%, SiO
2Content 5%) be 5% of inner lining material gross weight.Above-mentioned two kinds of batchings are added bond respectively mix evenly in muller, isostatic compaction in the oven dry back injection gum cover between 70 ℃, body aluminium carbon material injects the outside, and liner not carbon containing material injects inboard, briquetting pressure 140Mpa, pressurize 3 minutes.Base substrate heat treatment in 1300 ℃ * 6 hours under the shuttle kiln blanket of nitrogen after the moulding forms through processing, installation metal vent hood, brush antioxidizing paint again.
The outer aluminium carbon batching of long nozzle is brown diamond spar 55%, sintering oxidation aluminium powder 14%, and crystalline flake graphite 25%, carborundum powder 5%, boron carbide 1%, bond phenolic resins is 10% of the batching gross weight; Carbon containing internal layer batching is not electro-corundum 70%, Al
2O
3-MgO-TiO
2Synthesis material 25%, it consists of Al
2O
350%, MgO10%, TiO
240%; Metallic aluminium powder 5%, aluminium colloidal sol (Al
2O
3Content 25%) be 5% of inner lining material gross weight.Above-mentioned two kinds of batchings are added bond respectively mix evenly in muller, inject isostatic compaction in the gum cover after 70 ℃ of oven dry, body aluminium carbon material injects the outside, and the injection of carbon containing material is not inboard for liner, briquetting pressure 140Mpa, pressurize 3 minutes.Base substrate heat treatment in 1300 ℃ * 3 hours under the shuttle kiln blanket of nitrogen after the moulding forms through processing, installation metal vent hood, brush antioxidizing paint again.
Embodiment 3
Outer aluminium carbon batching is brown diamond spar 55%, sintering oxidation aluminium powder 14%, and crystalline flake graphite 25%, carborundum powder 5%, boron carbide 1%, bond phenolic resins is 10% of the batching gross weight; Carbon containing internal layer batching is not magnesium aluminate spinel 25%, Al
2O
3-MgO-TiO
2Synthesis material 70%, it consists of Al
2O
350%, MgO5%, TiO
245%; Al-Mg alloy powder 5%, phenolic resins are 8% of liner batching total weight percent.Above-mentioned two kinds of batchings are added bond respectively mix evenly in muller, inject isostatic compaction in the gum cover after 70 ℃ of oven dry, body aluminium carbon material injects the outside, and it is inboard that liner does not have the carbon-free material injection of silicon, briquetting pressure 140Mpa, pressurize 3 minutes.Base substrate heat treatment in 1200 ℃ * 3 hours under the shuttle kiln blanket of nitrogen after the moulding forms through processing, installation metal vent hood, brush antioxidizing paint again.
Embodiment 4
Outer aluminium carbon batching is brown diamond spar 55%, sintering oxidation aluminium powder 14%, and crystalline flake graphite 25%, carborundum powder 5%, boron carbide 1%, bond phenolic resins is 10% of the batching gross weight; Carbon containing internal layer batching is not electro-corundum 45%, Al
2O
3-MgO-TiO
2Synthesis material 47%, it consists of Al
2O
350%, MgO15%, TiO
235%; Silica flour 8%, magnalium colloidal sol (Al
2O
3Content 20%, MgO content 5%) be 8% of inner lining material gross weight.Above-mentioned two kinds of batchings are added bond respectively mix evenly in muller, inject isostatic compaction in the gum cover after 70 ℃ of oven dry, body aluminium carbon material injects the outside, and it is inboard that liner does not have the carbon-free material injection of silicon, briquetting pressure 140Mpa, pressurize 3 minutes.Base substrate heat treatment in 1200 ℃ * 3 hours under the shuttle kiln blanket of nitrogen after the moulding forms through processing, installation metal vent hood, brush antioxidizing paint again.
Embodiment 5
Outer aluminium carbon batching is brown diamond spar 55%, sintering oxidation aluminium powder 14%, and crystalline flake graphite 25%, carborundum powder 5%, boron carbide 1%, bond phenolic resins is 10% of the batching gross weight; Carbon containing internal layer batching is not alundum 25%, magnesium aluminate spinel 45%, Al
2O
3-MgO-TiO
2Synthesis material 26%, it consists of Al
2O
340%, MgO8%; TiO
252%; Silica flour 4%, aluminium colloidal sol (Al
2O
3Content 25%) be 8% of inner lining material gross weight.Above-mentioned two kinds of batchings are added bond respectively mix evenly in muller, inject isostatic compaction in the gum cover after 70 ℃ of oven dry, body aluminium carbon material injects the outside, and it is inboard that liner does not have the carbon-free material injection of silicon, briquetting pressure 140Mpa, pressurize 3 minutes.Base substrate heat treatment in 1200 ℃ * 3 hours under the shuttle kiln blanket of nitrogen after the moulding forms through processing, installation metal vent hood, brush antioxidizing paint again.
Claims (7)
1, a kind of preheating composite construction long nozzle of exempting from, this mouth of a river has Al
2O
3The skin of-C material (1), feature of the present invention is: the inwall of outer (1) is compounded with the not liner of carbon containing material (2), and this inner lining material is by the metal powder additive and have low-expansion ternary system Al
2O
3-MgO-TiO
2Synthesis material, sintering or electric smelting spinelle, corundum are formed; Wherein, the consumption of spinelle, corundum is 25～70wt%, Al
2O
3-MgO-TiO
2The consumption of synthesis material is 25～70wt%, and the consumption of metal powder is 2～10wt%.
2, the preheating composite construction long nozzle of exempting from according to claim 1 is characterized in that: described ternary system Al
2O
3-MgO-TiO
2Synthesis material is pre-synthesis material, and it forms consumption is Al
2O
330～50wt%, MgO 5～15wt%, TiO
235～55wt%.
3, the preheating composite construction long nozzle of exempting from according to claim 1 is characterized in that: described metal powder is a kind of in aluminium powder, silica flour, Al-Mg alloy powder, the alusil alloy powder.
4, the preheating composite construction long nozzle of exempting from according to claim 1, it is characterized in that: the part of described skin (1) inwall is compounded with the not liner of carbonaceous material.
5, the preheating composite construction long nozzle of exempting from according to claim 1, it is characterized in that: described skin (1) inwall all is compounded with the not liner of carbonaceous material.
6, the preheating composite construction long nozzle of exempting from according to claim 1 is characterized in that: it is bond that described liner adopts phenolic resins, and its addition is 4～10% of an inner lining material gross weight.
7, the preheating composite construction long nozzle of exempting from according to claim 1, it is characterized in that: described liner adopts inorganic bonding agent, it is a kind of in aluminium dihydrogen phosphate, aluminium colloidal sol, aluminium Ludox, the magnalium colloidal sol, and the addition of inorganic bonding agent is 4～10% of a liner batching gross weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100603541A CN100398233C (en) | 2004-12-24 | 2004-12-24 | Long nozzle in composite structure free from prewarming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100603541A CN100398233C (en) | 2004-12-24 | 2004-12-24 | Long nozzle in composite structure free from prewarming |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1796025A true CN1796025A (en) | 2006-07-05 |
| CN100398233C CN100398233C (en) | 2008-07-02 |
Family
ID=36817466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100603541A Active CN100398233C (en) | 2004-12-24 | 2004-12-24 | Long nozzle in composite structure free from prewarming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100398233C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603317A (en) * | 2012-03-07 | 2012-07-25 | 陈漪恺 | Injecting sleeve for protective pouring of high-temperature metal melt and manufacture method thereof |
| CN103058694A (en) * | 2013-02-01 | 2013-04-24 | 武汉科技大学 | High-purity corundum-spinel composite material and preparation method thereof |
| CN103058693A (en) * | 2013-02-01 | 2013-04-24 | 武汉科技大学 | Tundish working lining for clean steel smelting and preparation method thereof |
| CN104039479A (en) * | 2011-12-28 | 2014-09-10 | 杰富意钢铁株式会社 | Immersion nozzle for continuous casting and continuous casting method using same |
| CN105127409A (en) * | 2015-09-15 | 2015-12-09 | 辽宁科技大学 | Preheating-free long nozzle capable of being repeatedly used and preparing method thereof |
| CN105195724A (en) * | 2015-10-10 | 2015-12-30 | 无锡兴达节能科技股份有限公司 | Novel aluminum-carbon brick used for hot metal ladle |
| CN105665692A (en) * | 2016-03-24 | 2016-06-15 | 洛阳理工学院 | Thermal shock resistant liner composite body for long nozzle and preparation process thereof |
| CN105983684A (en) * | 2015-03-05 | 2016-10-05 | 宝山钢铁股份有限公司 | Low-carbon inner hole body-contained submersed nozzle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6096567A (en) * | 1983-10-29 | 1985-05-30 | ハリマセラミック株式会社 | Manufacture of sliding nozzle plate |
| JP2000202583A (en) * | 1999-01-12 | 2000-07-25 | Kawasaki Steel Corp | Continuous casting method and mold for continuous casting |
-
2004
- 2004-12-24 CN CNB2004100603541A patent/CN100398233C/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104039479A (en) * | 2011-12-28 | 2014-09-10 | 杰富意钢铁株式会社 | Immersion nozzle for continuous casting and continuous casting method using same |
| CN104039479B (en) * | 2011-12-28 | 2016-07-06 | 杰富意钢铁株式会社 | Immersion nozzle for continuous casting and manufacture method thereof and use the continuous casing of this immersion nozzle for continuous casting |
| CN102603317A (en) * | 2012-03-07 | 2012-07-25 | 陈漪恺 | Injecting sleeve for protective pouring of high-temperature metal melt and manufacture method thereof |
| CN102603317B (en) * | 2012-03-07 | 2013-08-14 | 陈漪恺 | Injecting sleeve for protective pouring of high-temperature metal melt and manufacture method thereof |
| CN103058694A (en) * | 2013-02-01 | 2013-04-24 | 武汉科技大学 | High-purity corundum-spinel composite material and preparation method thereof |
| CN103058693A (en) * | 2013-02-01 | 2013-04-24 | 武汉科技大学 | Tundish working lining for clean steel smelting and preparation method thereof |
| CN105983684A (en) * | 2015-03-05 | 2016-10-05 | 宝山钢铁股份有限公司 | Low-carbon inner hole body-contained submersed nozzle |
| CN105127409A (en) * | 2015-09-15 | 2015-12-09 | 辽宁科技大学 | Preheating-free long nozzle capable of being repeatedly used and preparing method thereof |
| CN105195724A (en) * | 2015-10-10 | 2015-12-30 | 无锡兴达节能科技股份有限公司 | Novel aluminum-carbon brick used for hot metal ladle |
| CN105665692A (en) * | 2016-03-24 | 2016-06-15 | 洛阳理工学院 | Thermal shock resistant liner composite body for long nozzle and preparation process thereof |
| CN105665692B (en) * | 2016-03-24 | 2018-05-11 | 洛阳理工学院 | A kind of long nozzle anti-thermal shock liner complex and its preparation process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100398233C (en) | 2008-07-02 |
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Owner name: SINOSTEEL CORPORATION LUOYANG INSTITUTE OF REFRACT Free format text: FORMER NAME: SINOSTEEL CORPORATION LUOYANG INSTITUTE OF REFRACTORIES RESEARCH |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 471039 Xiyuan Road, Jianxi District, Henan, No. 43, No. Patentee after: Luoyang Refractory Institute Co., Ltd., SINO Steel Corporation Address before: 471039 Xiyuan Road, Jianxi District, Henan, No. 43, No. Patentee before: Luoyang Refractory Materials Inst, Zhonggang Group |