CN102441651A - Method for judging and handling steel channeling on junction surface of submerged nozzle - Google Patents
Method for judging and handling steel channeling on junction surface of submerged nozzle Download PDFInfo
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- CN102441651A CN102441651A CN2011104034785A CN201110403478A CN102441651A CN 102441651 A CN102441651 A CN 102441651A CN 2011104034785 A CN2011104034785 A CN 2011104034785A CN 201110403478 A CN201110403478 A CN 201110403478A CN 102441651 A CN102441651 A CN 102441651A
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- faying face
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Abstract
The invention provides a method for judging and handling steel channeling on the junction surface of a submerged nozzle. The method comprises the following steps of: turning down the argon flow according to the overturning condition of the liquid level of molten steel, detecting a submerged nozzle part under the liquid level by using a stick if the overturning variation of the liquid level is unremarkable, and judging that an air sucking phenomenon exists at a junction surface of the submerged nozzle and a down nozzle if no remarkable crack exists on the upper part of the liquid level; when steel channeling appears on the junction surface, decelerating immediately, turning down the argon flow, communicating an argon tube, and cooling the junction surface at high argon flow; closely watching the opening state of a sliding plate, and appropriately adjusting the argon flow; and recovering the argon flow at an upper nozzle simultaneously, and pulling steel at a low speed till casting is finished. Due to the adoption of the method, the problem of steel channeling on the junction surface can be discovered and handled as early as possible, casting stop accidents caused by steel channeling are avoided, heat recovery and cold recovery of the molten steel are reduced, the accident loss is lowered, and successful performance of production is ensured.
Description
Technical field
The invention belongs to the continuous casting process field, immerse the emergent determination processing method that steel appears scurrying in the mouth of a river and following mouth of a river faying face in particularly a kind of casting process.
Background technology
Wear out, air-dry crackle etc. arranged if immerse the faying face out-of-flatness or the mouth of a river pad at the mouth of a river and the following mouth of a river, all can cause mouth of a river faying face to scurry steel, in case scurry steel and don't take proper measure in time to save; Will make and scurry the expansion of steel place; Cause and be compelled to stop the accident of watering, thereby cause cold recovery, the recuperation of heat of molten steel, not only cause billet yield to descend and increase molten steel after-treatment amount; Have a strong impact on carrying out smoothly of production; Directly increased production cost, and will bring certain influence, caused great economic loss to enterprise to slab quality.
Summary of the invention
The present invention aims to provide and a kind ofly can find to scurry the steel sign as early as possible and scurry the steel accident with in time handling, and avoids accident to stop watering, and the immersion mouth of a river faying face that reduces cold recovery of molten steel and heat recovery rate is scurried the processing method of steel.
For this reason, the technical solution that the present invention taked is:
A kind ofly immerse the determination processing method that mouth of a river faying face is scurried steel, it is characterized in that:
(1), mouth of a river faying face is scurried the preceding judgement of steel:
Scurry the preceding mouth of a river of steel faying face and inspiratory phenomenon can occur, it is air-breathing to be accompanied by faying face, and molten steel contacts with airborne oxygen, and the molten steel liquid level of an air-breathing side is dug more than the 10mm, and after argon gas closed, liquid level stirred degree and changes little; Whether survey liquid level with wooden stick and immerse mouth of a river part down, observing liquid level top simultaneously has obvious crackle, as does not have obvious crackle or leak eye, can conclude that then immersing the mouth of a river exists inspiratory phenomenon with following mouth of a river faying face;
(2), mouth of a river faying face is scurried the processing of steel:
Occur scurrying steel if immerse the mouth of a river with following mouth of a river faying face, will draw steel speed to reduce to 0.8-1.0 m/min immediately, the argon flow amount of filling pipe end and slide plate is controlled to 10m
3/ h reduces the molten steel flow of mouth of a river passage, and near the following mouth of a river of scurrying the steel place, connects a tunger tube rapidly, and argon flow amount is controlled to 30 ~ 40m
3/ h cools off faying face, makes faying face form cold steel fast; Treat liquid level stabilizing, scurry after steel stops and stablizing 10 ~ 15min, argon gas is adjusted to 10 ~ 20m
3/ h prevents nozzle clogging; Pay close attention to and, suitably adjust argon flow amount according to the aperture state of slide plate; Simultaneously, recover argon flow amount to the 30 ~ 40m of filling pipe end
3/ h, the melting state of assurance covering slag; Take 0.8 ~ 1.0 m/min low speed to draw steel, prevent that excessive steel stream from washing away the cold steel that has solidified, until watering time end.
Beneficial effect of the present invention is:
One aspect of the present invention can be found to immerse the hidden danger that steel appears scurrying in mouth of a river faying face as early as possible, controls so that in time take measures; Simultaneously in case after the steel accident occurring scurrying, also can effectively meet an urgent need and remedy, the accident that prevents enlarges, thereby avoids reducing recuperation of heat, the cold recovery of molten steel owing to scurry the accident of watering of stopping that steel causes, the reduction causality loss, and that guarantees to produce carries out smoothly.The inventive method is simple, is convenient to operation, and can improves the cast effect to a certain extent, improves faying face and scurries the influence of steel to slab quality.
The specific embodiment
Embodiment 1:
Immerse the judgement before mouth of a river faying face is scurried steel:
Mouth of a river faying face has certain sign before scurrying steel; Promptly scurry the preceding mouth of a river of steel faying face and inspiratory phenomenon can occur; And it is air-breathing to be accompanied by faying face, and molten steel contacts with airborne oxygen, will speed up immersing the etch of mouth of a river faying face; If untimely taking measures will be caused the steel accident of scurrying of mouth of a river faying face.The air-breathing main feature of faying face is that after the faying face appearance was air-breathing, bigger stirring will appear in the molten steel liquid level of an air-breathing side.Be that the molten steel liquid level is dug and can be reached more than the 10mm.For confirming whether faying face air-breathing, and its measure is after argon gas is closed, observe liquid level and stir situation, bigger if liquid level still stirs, the size that argon flow amount is described to liquid level to stir influential effect little.Survey liquid level with wooden stick again this moment and immerse mouth of a river part down; Whether observe liquid level top has obvious crackle or leaks eye; As do not have obvious crackle or leak eye; Then there is inspiratory phenomenon in the decidable immersion mouth of a river with following mouth of a river faying face, just should in time take measures to control, and also can handle according to the way of scurrying steel.
Immerse the processing after steel appears scurrying in mouth of a river faying face:
Occur scurrying steel if immerse the mouth of a river with following mouth of a river faying face, will draw steel speed to reduce to 0.9 m/min immediately, the argon flow amount of filling pipe end and slide plate is controlled to 10m
3/ h reduces the molten steel flow of mouth of a river passage, and near the following mouth of a river of scurrying the steel place, connects a tunger tube rapidly, and argon flow amount is controlled to 40m
3/ h adopts argon gas cooling faying face, makes faying face form cold steel fast.Treat liquid level stabilizing, scurry after steel stops, stablizing 14min again, in time turn argon flow amount then down, argon gas is adjusted to 15m
3/ h, preventing the excessive nozzle clogging that causes of intensity of cooling of argon gas from influencing casting condition.Simultaneously, should pay close attention to the aperture situation of slide plate constantly, and the argon flow amount of filling pipe end is returned to 34m
3/ h guarantees the melting state of covering slag.In this process, should take the low speed of 0.8m/min to draw steel all the time, even after in stable condition, also can not improve pulling rate, flow through greatly to prevent steel, wash away the cold steel that has solidified, cause faying face to scurry steel again.Reduction of speed draws steel until originally watering time end, faying face is handled again, and avoids scurrying once more steel.
Embodiment 2:
Immerse the judgement before mouth of a river faying face is scurried steel:
Scurry the preceding mouth of a river of steel faying face and inspiratory phenomenon can occur, and it is air-breathing to be accompanied by faying face, molten steel contacts with airborne oxygen, will speed up immersing the etch of mouth of a river faying face, if untimely taking measures will be caused the steel accident of scurrying of mouth of a river faying face.After the faying face appearance was air-breathing, bigger stirring will appear in the molten steel liquid level of an air-breathing side.Be that the molten steel liquid level is dug and can be reached more than the 10mm.And after argon gas is closed, bigger if liquid level still stirs, the size that argon flow amount is described to liquid level to stir influential effect little.Survey liquid level with wooden stick again this moment and immerse mouth of a river part down; Whether observe liquid level top has obvious crackle or leaks eye; As do not have obvious crackle or leak eye; Then there is inspiratory phenomenon in the decidable immersion mouth of a river with following mouth of a river faying face, just should in time take measures to control, and also can handle according to the way of scurrying steel.
Immerse the processing after steel appears scurrying in mouth of a river faying face:
Occur scurrying steel if immerse the mouth of a river with following mouth of a river faying face, will draw steel speed to reduce to 1.0 m/min immediately, the argon flow amount of filling pipe end and slide plate is controlled to 10m
3/ h reduces the molten steel flow of mouth of a river passage, and near the following mouth of a river of scurrying the steel place, connects a tunger tube rapidly, and argon flow amount is controlled to 30m
3/ h adopts argon gas cooling faying face, makes faying face form cold steel fast.Treat liquid level stabilizing, scurry after steel stops, stablizing 10min again, in time turn argon flow amount then down, argon gas is adjusted to 20m
3/ h, preventing the excessive nozzle clogging that causes of intensity of cooling of argon gas from influencing casting condition.Simultaneously, should pay close attention to the aperture situation of slide plate constantly, and the argon flow amount of filling pipe end is returned to 40m
3/ h guarantees the melting state of covering slag.In this process, should take the low speed of 1.0m/min to draw steel all the time, even after in stable condition, also can not improve pulling rate, flow through greatly to prevent steel, wash away the cold steel that has solidified, cause faying face to scurry steel again.Reduction of speed draws steel until originally watering time end, faying face is handled again, and avoids scurrying once more steel.
Claims (1)
1. one kind immerses the determination processing method that mouth of a river faying face is scurried steel, it is characterized in that:
(1), mouth of a river faying face is scurried the preceding judgement of steel:
Scurry the preceding mouth of a river of steel faying face and inspiratory phenomenon can occur, it is air-breathing to be accompanied by faying face, and molten steel contacts with airborne oxygen, and the molten steel liquid level of an air-breathing side is dug more than the 10mm, and after argon gas closed, liquid level stirred degree and changes little; Whether survey liquid level with wooden stick and immerse mouth of a river part down, observing liquid level top simultaneously has obvious crackle, as does not have obvious crackle or leak eye, can conclude that then immersing the mouth of a river exists inspiratory phenomenon with following mouth of a river faying face;
(2), mouth of a river faying face is scurried the processing of steel:
Occur scurrying steel if immerse the mouth of a river with following mouth of a river faying face, will draw steel speed to reduce to 0.8-1.0 m/min immediately, the argon flow amount of filling pipe end and slide plate is controlled to 10m
3/ h reduces the molten steel flow of mouth of a river passage, and near the following mouth of a river of scurrying the steel place, connects a tunger tube rapidly, and argon flow amount is controlled to 30 ~ 40m
3/ h cools off faying face, makes faying face form cold steel fast; Treat liquid level stabilizing, scurry after steel stops and stablizing 10 ~ 15min, argon gas is adjusted to 10 ~ 20m
3/ h prevents nozzle clogging; Pay close attention to and, suitably adjust argon flow amount according to the aperture state of slide plate; Simultaneously, recover argon flow amount to the 30 ~ 40m of filling pipe end
3/ h, the melting state of assurance covering slag; Take 0.8 ~ 1.0 m/min low speed to draw steel, prevent that excessive steel stream from washing away the cold steel that has solidified, until watering time end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110403478.5A CN102441651B (en) | 2011-12-07 | 2011-12-07 | A kind of soaking water gap faying face alters the determination processing method of steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110403478.5A CN102441651B (en) | 2011-12-07 | 2011-12-07 | A kind of soaking water gap faying face alters the determination processing method of steel |
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| CN102441651A true CN102441651A (en) | 2012-05-09 |
| CN102441651B CN102441651B (en) | 2015-11-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001892A (en) * | 2014-06-12 | 2014-08-27 | 鞍钢股份有限公司 | Method for adjusting tundish argon flow |
| CN106077542A (en) * | 2016-06-28 | 2016-11-09 | 山东钢铁股份有限公司 | A kind of judge to corrode and the method for air-breathing between tundish lower nozzle and submersed nozzle plate |
| CN113042726A (en) * | 2021-03-11 | 2021-06-29 | 天津市新天钢钢铁集团有限公司 | Method for treating steel channeling between slab continuous casting quick-change water gap plates |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62279059A (en) * | 1986-05-26 | 1987-12-03 | Nippon Kokan Kk <Nkk> | Submerged nozzle |
| JPH0390262A (en) * | 1989-08-31 | 1991-04-16 | Sumitomo Metal Ind Ltd | Method and device for preventing drift stream in discharged flow in mold |
| JPH0970652A (en) * | 1995-09-08 | 1997-03-18 | Nippon Steel Corp | Method for preventing uneven flow of molten steel in continuous casting mold |
| KR20040044001A (en) * | 2002-11-20 | 2004-05-27 | 주식회사 포스코 | Submerged Nozzle for Generating Multi-Flow |
| CN101602104A (en) * | 2009-04-17 | 2009-12-16 | 陈红良 | A kind of tundish and use this tundish to remove the method for nonmetal impurities |
| CN201848533U (en) * | 2010-10-28 | 2011-06-01 | 黄石市火炬科技实业有限责任公司 | Device for quick replacing nozzles of continuous casting tundish with argon admission function |
| CN102764868A (en) * | 2012-07-11 | 2012-11-07 | 北京科技大学 | Blowing and refining device and method used for removing tundish molten steel inclusion |
-
2011
- 2011-12-07 CN CN201110403478.5A patent/CN102441651B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62279059A (en) * | 1986-05-26 | 1987-12-03 | Nippon Kokan Kk <Nkk> | Submerged nozzle |
| JPH0390262A (en) * | 1989-08-31 | 1991-04-16 | Sumitomo Metal Ind Ltd | Method and device for preventing drift stream in discharged flow in mold |
| JPH0970652A (en) * | 1995-09-08 | 1997-03-18 | Nippon Steel Corp | Method for preventing uneven flow of molten steel in continuous casting mold |
| KR20040044001A (en) * | 2002-11-20 | 2004-05-27 | 주식회사 포스코 | Submerged Nozzle for Generating Multi-Flow |
| CN101602104A (en) * | 2009-04-17 | 2009-12-16 | 陈红良 | A kind of tundish and use this tundish to remove the method for nonmetal impurities |
| CN201848533U (en) * | 2010-10-28 | 2011-06-01 | 黄石市火炬科技实业有限责任公司 | Device for quick replacing nozzles of continuous casting tundish with argon admission function |
| CN102764868A (en) * | 2012-07-11 | 2012-11-07 | 北京科技大学 | Blowing and refining device and method used for removing tundish molten steel inclusion |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001892A (en) * | 2014-06-12 | 2014-08-27 | 鞍钢股份有限公司 | Method for adjusting tundish argon flow |
| CN106077542A (en) * | 2016-06-28 | 2016-11-09 | 山东钢铁股份有限公司 | A kind of judge to corrode and the method for air-breathing between tundish lower nozzle and submersed nozzle plate |
| CN113042726A (en) * | 2021-03-11 | 2021-06-29 | 天津市新天钢钢铁集团有限公司 | Method for treating steel channeling between slab continuous casting quick-change water gap plates |
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| CN102441651B (en) | 2015-11-18 |
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