CN102962421A - Hot recycling method of continuous-casting tundish - Google Patents
Hot recycling method of continuous-casting tundish Download PDFInfo
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- CN102962421A CN102962421A CN2012104846636A CN201210484663A CN102962421A CN 102962421 A CN102962421 A CN 102962421A CN 2012104846636 A CN2012104846636 A CN 2012104846636A CN 201210484663 A CN201210484663 A CN 201210484663A CN 102962421 A CN102962421 A CN 102962421A
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Abstract
The invention discloses a hot recycling method of a continuous-casting tundish. In continuous-casting production, after the casting is finished, the casting stopping level of residual molten steel of the continuous-casting tundish is controlled to be between 180-220mm; a tundish cart reaches a residual-molten-steel discharging position, the part below the end surface of an immersion type water port is cut off instantaneously, a stopping rod is opened to be largest instantaneously after the immersion type water port and a steel receiving hole on a special slag basin cover are aligned, and the residual-molten-steel in the tundish is quickly discharged into a slag basin; in the discharging process of the residual molten steel of the tundish, the stopping rod is moved to the position of the water port of the tundish, and then the stopping rod, residual slag and residual steel of the stopping rod, the water port of the tundish and the peripheral area are cleared; in the process of clearing the immersion type water port, the remaining part of the immersion type water port stops at the position of the water port of the tundish still; after the clearing of the water port is finished, a blind plate is arranged to push out the remaining immersion type water port; and the production preparation time during continuous casting is controlled to be in 60min.
Description
Technical field
The invention belongs to steel-smelting technology, be specifically related to the hot recycling method of a kind of continuous casting tundish.
Background technology
The present steel industry enters low margin age, and the client is more and more harsher to the requirement of iron and steel enterprise, and quality requirement is more and more higher, and little order is more and more, and delivery date is shorter and shorter, and the kind conversion is more and more frequent.How satisfying the requirements such as quality requirement height, order and kind conversion are frequent, the delivery cycle is short is iron and steel enterprise's problem demanding prompt solution.In order to adapt to the variation in market, a lot of iron and steel enterprises shorten continuous casting and even water the stove number.But under the prior art condition, even watering the stove number will inevitably bring the problems such as the tundish cost of anti-material the and iron and steel stock consuming cost increase considerably in shortening:
(1) the continuous casting tundish cost of anti-the material increases.Current continuous casting bakie working lining all is disposable use, after namely continuous casting waters time and to finish, after the tundish that will have a remaining molten steel is cooled to uniform temperature together, uses the tundish overturning device that remaining molten steel is routed up.In the tundish cooling procedure, powder phenomenon-tion will occur in the continuous casting bakie working lining; When underway the remaining molten steel of bag tumbled operation, the working lining of tundish also damaged thereupon.Therefore, after having to bakie working lining again tied a knot, toasts again tissue open and water, continuous casting connects that to water the stove number shorter like this, the qualified continuous casting billet that single tundish is produced is just fewer, the anti-material expense of the tundish of qualified continuous casting billet per ton is just higher.
(2) the iron and steel stock consuming cost increases.When current continuous casting stops watering, for guaranteeing that Tundish Slag does not enter in the crystallizer, to avoid occuring the serious accidents such as crystallizer bleed-out, tundish stops watering liquid surface height controlling about 300mm, the remaining molten steel of tundish is approximately 5 ~ 7 tons, that is to say that each waters time and will have 5 ~ 7 tons of molten steel can not become continuous casting billet when finishing but become steel scrap, thereby increased the iron and steel stock consuming cost.And the iron and steel stock consuming cost recruitment that the remaining molten steel of middle bag that each waters time causes is certain, therefore, singly waters and time connects that to water the stove number fewer, and the qualified continuous casting billet that singly waters time output is just fewer, and the iron and steel stock consuming cost that qualified strand per ton increases is just higher.
At present, water the stove number except shortening to connect, method and shortcoming thereof that iron and steel enterprise's reply high-quality, little order, short delivery delivery date and the flexibly market demands of variety variations are adopted are as follows:
1) increase steel grade and be connected number of times, reject the linking base: shortcoming is changed the original sentence to or the use of demoting for being connected base, has increased considerably production cost.Little order is more, and the kind conversion is more frequent, and the shortcoming performance of this mode is more obvious.
2) prolong the delivery cycle, make of the same type, same specification order volume reach after certain requirement tissue again and produce: shortcoming be for can't satisfy customer requirement, can't adaptation to market variations, reduced the market competitiveness.
3) adopt standby base, namely for some steel grade, section etc., the continuous casting billet of disposable production some is for subsequent use: shortcoming is long-time occupied fund, affects simultaneously the lumber recovery of steel rolling, thereby increases the production run cost.
4) abandon little order, namely require the size of order of single order must reach certain tonnage: obviously can't meet customer need, the market competitiveness is poor.
Summary of the invention
The object of the present invention is to provide a kind of above-mentioned prior art weak point that overcomes, can reduce the hot recycling method of continuous casting tundish of tundish refractory consumption rate and iron and steel stock consuming cost.
Technical scheme of the present invention:
The hot recycling method of continuous casting tundish: during continuous casting is produced, water time finish after, tundish stops watering level control at 180 ~ 220mm, remaining molten steel is controlled at 2.5 ~ 3.5 tons in the tundish; Tundish car arrives remaining molten steel discharging position, immediately the following position of submersed nozzle end face is interrupted, with submersed nozzle and Special slag pot cover be subjected to the alignment of steel hole after, immediately stopper is opened to maximum, fast remaining molten steel in the tundish is entered in the slag basin; In the remaining molten steel discharge process of tundish, stopper is removed the middle water containing opening position, subsequently the residue of stopper, middle water containing opening and peripheral region thereof, residual steel are cleared up; In cleaning submersed nozzle process, the submersed nozzle nubbin still rests on the middle water containing opening position, to avoid in the scale removal process of the mouth of a river residual steel or residue the slideway injury is installed in middle water-coating port upper surface and submersed nozzle; After mouth of a river cleaning was finished, the blind plate of the particular design of packing into was released remaining submersed nozzle; Producing time between continuous casting waters time is controlled in the 60min.
The tundish bottom becomes certain gradient with horizontal plane, a rectangle aperture is arranged at the weir and dam in tundish bottom, and tundish can all be flowed into by steel side molten steel and waters the steel side when stopping watering with assurance.
The beneficial effect of the invention: after continuous casting waters time end, directly be discharged into the remaining molten steel of tundish in the Special slag pot, after the residue of stopper, the mouth of a river and the peripheral region, the mouth of a river of tundish or residual steel cleaned out, after immediately tundish being toasted again, the reorganization continuous casting is opened and is watered, and greatly reduces tundish refractory consumption rate and iron and steel stock consuming cost.
Description of drawings
Fig. 1 is the blind plate cutaway view.
Fig. 2 is the top view of Fig. 1.
The specific embodiment
The hot recycling embodiment of the method for continuous casting tundish, processing step is as follows:
1) tundish bottom and barricade design: be subjected to the steel side to be designed to certain gradient between the steel side to watering the tundish bottom, and in the one rectangle perforate of barricade bottom design, when stopping watering with assurance, all flowed into by steel side molten steel and water the steel side, thereby reduce the remaining molten steel of tundish.
2) reduce tundish and stop watering liquid level and remaining molten steel: when Metal in Tundish weight reaches respectively 6 tons and 4.5 left and right sides, each measures the Metal in Tundish liquid level one time, and according to different sections, the conticaster pulling rate is controlled between 0.3 ~ 0.5m/min, when last liquid level reaches 220 ~ 240mm, after pouring into a mould 15 ~ 30S again according to different casting, different liquid level, close stopper.
3) the remaining molten steel of discharging tundish: tundish car is opened to slag basin position, the following position of submersed nozzle section is interrupted, submersed nozzle covers with the slag basin and alignd by the steel hole, and then tundish is adjusted to low level, with the stopper standard-sized sheet.
4) residue of stopper, middle water containing opening and peripheral region thereof, the cleaning of residual steel: at first stopper is removed from position, the mouth of a river, clean out again, with compressed air the residue around the mouth of a river is blown in the mouth of a river subsequently, immediately with oxygen to the mouth of a river and clear up on every side.In the scale removal process, the submersed nozzle residual fraction must not take out, and with protection middle water containing opening end face and submersed nozzle slideway is installed.
5) take off the submersed nozzle residual fraction: after the residue of stopper, the mouth of a river and peripheral region thereof, the cleaning of residual steel are finished, put into the blind plate of particular design, mouth of a river residual fraction is released, then take off blind plate.
6) baking of tundish: after taking off blind plate, immediately tundish is toasted, in the bake process, submersed nozzle must not be installed, to avoid in the bake process of the mouth of a river, still have slag to flow out from the mouth of a river in the tundish, stop up submersed nozzle.
7) crystallizer binds: tundish car is opened after water the steel position, observes immediately the molten steel in mold liquid level, has been confirmed whether that Tundish Slag enters crystallizer, if lower slag is arranged, with burning the oxygen pipe bits stop place is stirred immediately, and the cooling of then fetching water is bound.
8) produce preparation: when the tail base arrived the fan-shaped section horizontal segment, beginning was sent dummy bar in crystallizer, do to open and water preparation.
9) submersed nozzle roasting: continuous casting waters time last stove and opens when watering, and begins to toast next and waters inferior submersed nozzle.
10) stopper centering is adjusted: open and water front 5min stopper centering is adjusted.
11) submersed nozzle is installed: after stopper centering is adjusted and finished, after the baking of tundish device lifted, submersed nozzle is installed immediately.
12) open and water: after installing submersed nozzle, tundish car is opened to watering the steel position, adjust immersible ladle nozzle centering and insertion depth after, open steel ladle slide board and open and water.
Claims (2)
1. the hot recycling method of continuous casting tundish is characterized in that: during continuous casting is produced, water time finish after, the remaining molten steel of continuous casting tundish stops watering level control at 180 ~ 220mm; Tundish car arrives remaining molten steel discharging position, immediately the following position of submersed nozzle end face is interrupted, with submersed nozzle and Special slag pot cover be subjected to the alignment of steel hole after, immediately stopper is opened to maximum, fast remaining molten steel in the tundish is entered in the slag basin; In the remaining molten steel discharge process of tundish, stopper is removed the middle water containing opening position, subsequently the residue of stopper, middle water containing opening and peripheral region thereof, residual steel are cleared up; In cleaning submersed nozzle process, the submersed nozzle nubbin still rests on the middle water containing opening position; After mouth of a river cleaning was finished, the blind plate of packing into was released remaining submersed nozzle; Producing time between continuous casting waters time is controlled in the 60min.
2. according to claim 1 the hot recycling method of continuous casting tundish, it is characterized in that: the tundish bottom becomes certain gradient with horizontal plane, a rectangle aperture is arranged bottom the weir and dam in tundish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104846636A CN102962421A (en) | 2012-11-26 | 2012-11-26 | Hot recycling method of continuous-casting tundish |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104846636A CN102962421A (en) | 2012-11-26 | 2012-11-26 | Hot recycling method of continuous-casting tundish |
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| CN102962421A true CN102962421A (en) | 2013-03-13 |
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| CN2012104846636A Pending CN102962421A (en) | 2012-11-26 | 2012-11-26 | Hot recycling method of continuous-casting tundish |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935749A (en) * | 2016-06-28 | 2016-09-14 | 山东钢铁股份有限公司 | Method for eliminating flocculating flow blocking of upper nozzle of tundish |
| CN106735033A (en) * | 2016-12-15 | 2017-05-31 | 唐山新宝泰钢铁有限公司 | A kind of continuous casting production is secondary to open pouring technique |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01107948A (en) * | 1987-10-22 | 1989-04-25 | Kawasaki Steel Corp | Method and device for reusing tundish |
| JPH06304720A (en) * | 1993-04-23 | 1994-11-01 | Nippon Steel Corp | Tundish reused in hot-state |
| JPH08294756A (en) * | 1995-04-21 | 1996-11-12 | Nippon Steel Corp | Hot tundish reuse equipment in continuous casting machine |
| JPH08300112A (en) * | 1995-04-28 | 1996-11-19 | Nippon Steel Corp | Continuous casting method |
| JPH08309516A (en) * | 1995-05-18 | 1996-11-26 | Nippon Steel Corp | Treatment of tundish reused in hot-state |
| JPH09271912A (en) * | 1996-04-09 | 1997-10-21 | Nippon Steel Corp | Tundish for reusing in hot-condition |
| JPH10225765A (en) * | 1997-02-14 | 1998-08-25 | Nippon Steel Corp | Method for reusing continuous casting tundish |
| CN1804047A (en) * | 2006-01-19 | 2006-07-19 | 邯郸钢铁股份有限公司 | Method for reclaiming and cyclic utilizing residue molten steel slag in steel making |
-
2012
- 2012-11-26 CN CN2012104846636A patent/CN102962421A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01107948A (en) * | 1987-10-22 | 1989-04-25 | Kawasaki Steel Corp | Method and device for reusing tundish |
| JPH06304720A (en) * | 1993-04-23 | 1994-11-01 | Nippon Steel Corp | Tundish reused in hot-state |
| JPH08294756A (en) * | 1995-04-21 | 1996-11-12 | Nippon Steel Corp | Hot tundish reuse equipment in continuous casting machine |
| JPH08300112A (en) * | 1995-04-28 | 1996-11-19 | Nippon Steel Corp | Continuous casting method |
| JPH08309516A (en) * | 1995-05-18 | 1996-11-26 | Nippon Steel Corp | Treatment of tundish reused in hot-state |
| JPH09271912A (en) * | 1996-04-09 | 1997-10-21 | Nippon Steel Corp | Tundish for reusing in hot-condition |
| JPH10225765A (en) * | 1997-02-14 | 1998-08-25 | Nippon Steel Corp | Method for reusing continuous casting tundish |
| CN1804047A (en) * | 2006-01-19 | 2006-07-19 | 邯郸钢铁股份有限公司 | Method for reclaiming and cyclic utilizing residue molten steel slag in steel making |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935749A (en) * | 2016-06-28 | 2016-09-14 | 山东钢铁股份有限公司 | Method for eliminating flocculating flow blocking of upper nozzle of tundish |
| CN106735033A (en) * | 2016-12-15 | 2017-05-31 | 唐山新宝泰钢铁有限公司 | A kind of continuous casting production is secondary to open pouring technique |
| CN106735033B (en) * | 2016-12-15 | 2018-09-25 | 唐山新宝泰钢铁有限公司 | A kind of continuous casting production is secondary to open pouring technique |
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Application publication date: 20130313 |