CN101091982A - Method and device for carrying out protected casting for shaped blank continuous casting by using single immersed nozzle - Google Patents
Method and device for carrying out protected casting for shaped blank continuous casting by using single immersed nozzle Download PDFInfo
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- CN101091982A CN101091982A CN 200710014826 CN200710014826A CN101091982A CN 101091982 A CN101091982 A CN 101091982A CN 200710014826 CN200710014826 CN 200710014826 CN 200710014826 A CN200710014826 A CN 200710014826A CN 101091982 A CN101091982 A CN 101091982A
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- casting
- tundish
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- shaped blank
- crystallizer
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Abstract
The invention relates to a method and device that adopts water gap to take shaped blank continuous casting protecting casting. It inserts a dipped water gap into the center position of shaped blank crystallizer web to take casting. The upper part of dipped water gap connects to upper water gap of pouring basket. Molten steel flowing channel is formed between pouring basket and crystallizer. The stopper is used to control molten steel flow control to realize indicating control in crystallizer. The invention could realize full process protecting cast of shaped blank continuous casting to ensure cleanliness of molten steel.
Description
Technical field
The present invention relates to metallurgical continuous casting steel machine protection casting technique, particularly protected casting for shaped blank continuous casting technology.
Background technology
Continuous casting protection casting is meant is even watering in the process; with molten steel and the isolated secondary oxidation that prevents molten steel of air, guarantee the molten steel cleannes, be the important measures that improve slab quality; for stabilizing continuous casting technology, enlarging the continuous casting kind also is a very otherwise effective technique simultaneously.The continuous casting total process protective casting comprises 4 aspects: (1) ladle is to the protection of tundish molten steel beam; (2) protection of tundish liquid steel level; (3) tundish is to the protection of crystallizer molten steel beam; (4) protection of crystallizer liquid steel level.
Be used to produce hot rolled H-shaped special-shaped base owing to the casting blank section complexity, web place thickness is thinner, realizes that tundish to the protection of crystallizer molten steel beam is cast with certain difficulty.Therefore steel mill both domestic and external all adopts half mode of opening wide cast to produce when producing mill run, promptly whenever fluently casts in the position, two trigonums of special-shaped base section with two metering nozzles and the funnel mouth of a river, and tundish to crystallizer beam is not protected.This mode is for producing general structural steel, and equipment is simple, control is easy, but molten steel is easily by secondary oxidation, and product quality is not high, and the funnel mouth of a river is changed frequent; The frequent replacing mouth of a river causes molten steel beam instability, slab quality instability, has increased the probability of bleed-out simultaneously.
When producing high-quality and specific use kind H shaped steel, must adopt the whole process protection casting during special-shaped base casting, to improve the quality of products.Tundish to the mode of the protection employing of crystallizer molten steel beam is stopper control stream and submersed nozzle protection pouring type at present; concrete mode has: (1) every stream adopts single submersed nozzle to realize the protection casting, and promptly every stream is cast in the trigonum of special-shaped base section one side with single immersed nozzle.But owing to be to cast in the trigonum of special-shaped base section one side with single immersed nozzle, molten steel is in whole crystallizer section maldistribution, molten steel in mold flow field, temperature field are unreasonable, accidents such as bonding steel leakage often take place, product quality is also unstable, and various surfaces and internal soundness problem are more; Owing to can not realize quick change, even the time of watering is limited by the life-span of submersed nozzle simultaneously.(2) every stream adopts two submersed nozzles to protect casting, and promptly every stream is cast in the trigonum of special-shaped base section both sides with two submersed nozzles.The advantage of this mode is both to have realized the protection of tundish to crystallizer molten steel beam, is beneficial to the protection casting that realizes the continuous casting overall process, has optimized molten steel flow field, temperature field in the crystallizer again, has reduced accidents such as bonding steel leakage, and product quality also is improved; But two submersed nozzles of this mode are to build together the whole submersed nozzle of interior dress by laying bricks or stones by the mode of interior dress and tundish, can not realize quick change, connecting the time of watering limited by the life-span of submersed nozzle, promptly one to water inferior company be the upper limit with service life of submersed nozzle the time of watering.In addition, above-mentioned submersed nozzle generally all is a straight barrel type, and the molten steel beam is deep to the liquid core impact depth in the crystallizer, is unfavorable for floating foreign.This built-in type straight barrel type submersed nozzle must guarantee certain wall thickness for guaranteeing the working time simultaneously, and for the special-shaped base of near-net-shape, narrow space is difficult to realize.
Summary of the invention
The object of the present invention is to provide a kind of method and device of protected casting for shaped blank continuous casting, realize the protection of casting for shaped blank continuous, solve the molten steel in mold flow field, the temperature field irrationality that exist when single immersed nozzle is cast special-shaped base simultaneously from tundish to crystallizer molten steel beam; And be implemented in the quick submersed nozzle of changing under the situation of not closing beam in the casting cycle and not opening wide casting, thereby the single Bao Lian that improves tundish waters the time.
For achieving the above object, technical solution of the present invention is:
Carry out the method for protected casting for shaped blank continuous casting with single immersed nozzle; it is characterized in that; web center in the casting for shaped blank continuous crystallizer is inserted single bilateral hole submersed nozzle and is cast; submersed nozzle top in bilateral hole links to each other the airtight beam passage of formation between tundish and crystallizer by quick-changing mechanism with filling pipe end in the tundish.
Preferably, filling pipe end top is carried out the beam flow-control and is realized liquid level control in the crystallizer with this with stopper.
Preferably, utilize quick-changing mechanism can carry out the fast online replacement of submersed nozzle in the casting cycle.Quick-changing mechanism is fixed on the tundish bottom; after the submersed nozzle life-span reaches capacity or nozzle clogging occurs or other abnormal conditions occur; the submersed nozzle that another is new is placed in the slideway of quick-changing mechanism preparation position; adopt hydraulic-driven; new submersed nozzle is flowed by steel fast; the submersed nozzle of replace old takes out used submersed nozzle then in crystallizer, realize the quick replacing of not shutting down, not promoting tundish, do not open wide casting, do not stop to water, do not fall pulling rate.Improve special-shaped billet continuous casting machine tundish list continuous cast crystallizer number, thereby improved the operating rate of conticaster.
Utilize the present invention and cooperate ladle to the protection of tundish molten steel beam, the protection of tundish liquid steel level, the resist technology of crystallizer liquid steel level can realize the total process protective casting of casting for shaped blank continuous.
A kind of device that is used for the method for single immersed nozzle casting for shaped blank continuous that the present invention also provides comprises tundish (1), bilateral hole submersed nozzle (6) and special-shaped billet crystallizer (5); Described tundish (1) inside is provided with filling pipe end (2) and corresponding stopper (3); The tundish bottom also has quick-changing mechanism (8) and submersed nozzle (6); Described submersed nozzle (6) links to each other by the interior filling pipe end (2) of quick-changing mechanism bottom tundish (1) and tundish, and submersed nozzle (6) inserts special-shaped billet crystallizer (5) web centre position.
Preferably, above-mentioned tundish (1) is provided with 1-6 filling pipe end and corresponding 1-6 stopper.
Preferably, be connected with 1-3 standby submersed nozzle on the above-mentioned quick-changing mechanism.
Preferably, above-mentioned quick-changing mechanism is the 1-6 cover, and submersed nozzle is 1-6.
Preferably, submersed nozzle adopts the design of flat bilateral outlet.Both realized the nozzle quick-change in the narrow space, and passed through mathematical simulation calculation simultaneously, the mouth of a river of design is optimized flow field and the temperature field in the crystallizer more, meets metallurgical rule more, has promoted the floating foreign eliminating simultaneously.
Preferably, be connected with guard plate on the quick-changing mechanism of tundish (1) bottom.Guard plate be in the state of accident (out of control) as stopper adopt promptly stop the scheme of watering, guard plate is replaced the submersed nozzle of casting, make that slag does not outflow in the tundish, realize that this stream stops watering, the accident of stopping takes place.
Advantage of the present invention
1. need to be specially adapted to the casting for shaped blank continuous of total process protective casting.
2. be specially adapted to special-shaped section conticaster or the thin-slab caster of web thickness less than 100mm.
3. can protect casting to the molten steel beam of crystallizer to the tundish of casting for shaped blank continuous, reduce molten steel by the probability of secondary oxidation.
4. can realize not shutting down, not promoting tundish, the unlimited quick replacing of casting, not stopping to water, do not fall pulling rate when changing submersed nozzle.
5. can carry out one or many and change submersed nozzle, realize single tundish sequence casting, increase substantially tundish and even water the time.
6. casting finishes or when having an accident, and closed safe plate rapidly makes that steel, slag do not outflow in the tundish, stops the accident generation.
7. on basis of the present invention,, help to improve the uniformity of Temperature Distribution in the crystallizer, promote inclusion floating, improve the quality of strand by the flow field in the optimal design crystallizer.
8. the meaning that particular importance is arranged for the quality that improves the casting for shaped blank continuous base, expansion kind and raising operating rate.
Description of drawings
Fig. 1 is a structural representation of the present invention.Wherein 1 is tundish, and 2 is filling pipe end, and 3 is stopper, and 4 is the slideway of quick-changing mechanism, and 5 is crystallizer, and 6 is submersed nozzle, and 7 is the standby immersion water mouth of a river, and 8 is quick-changing mechanism, and 9 is safety screen.
Fig. 2 is submersed nozzle position view in special-shaped billet crystallizer among the present invention.Wherein 5 is crystallizer, and 6 is submersed nozzle.
The specific embodiment
As shown in Figure 1, method of the present invention is: insert a submersed nozzle 6 in special-shaped billet crystallizer 5 web centre positions and cast, submersed nozzle top links to each other airtight beam passage of formation between tundish 1 and crystallizer 5 by 1 filling pipe end 2 in quick-changing mechanism 8 and the tundish; Filling pipe end 2 tops are carried out the flow-control of molten steel beam with a stopper 3 and are realized crystallizer liquid level control system with this.
Device of the present invention comprises tundish 1, submersed nozzle 6 and special-shaped billet crystallizer 5.Described tundish 1 is provided with a filling pipe end 2 and corresponding stopper 3 at least; Also have at least one cover quick-changing mechanism 8 and a submersed nozzle 6; Described submersed nozzle 6 is by linking to each other the special-shaped billet crystallizer of submersed nozzle 6 insertions 5 web centre positions with the quick-changing mechanism 8 of tundish 1 bottom with filling pipe end 2 in the tundish 1.
The present invention's submersed nozzle 6 in casting cycle closely is connected with filling pipe end 2 in the tundish 1 by quick-changing mechanism 8; can with from tundish 1 to crystallizer 5 molten steel beam and air isolated; can significantly reduce molten steel by the probability of secondary oxidation; cooperate ladle to the protection of tundish molten steel beam, the protection of tundish liquid steel level, the safeguard measure of crystallizer liquid steel level, can realize special-shaped base total process protective casting.
The present invention simultaneously can be implemented in the fast online replacement that carries out submersed nozzle 6 in the casting cycle.In casting cycle, standby submersed nozzle 7 can be put into the slideway 4 of quick-changing mechanism; utilize hydraulic means to head into casting position; take over the submersed nozzle 6 that needs to change and continue casting; the whole process time spent is very short, can realize the quick replacing of not shutting down, not promoting tundish, do not open wide casting, do not stop to water, do not fall pulling rate.When casting finishes or has an accident, can replace the submersed nozzle 6 of casting with guard plate 9 rapidly, the interior slag of tundish is not outflowed, realize that this stream stops watering, the accident of stopping takes place.
In sum, the present invention is specially adapted to protected casting for shaped blank continuous casting, cooperates ladle to the protection of tundish molten steel beam, the protection of tundish liquid steel level, the safeguard measure of crystallizer liquid steel level, can realize special-shaped base total process protective casting.And neither opening wide the function of changing submersed nozzle under the prerequisite that continues to flow again in casting and the crystallizer fast.To significantly improve tundish on this basis even waters the time.Simultaneously on basis to the submersed nozzle structure optimization; flow field and the temperature field that can effectively improve in the special-shaped billet crystallizer distribute; and, significantly improve special-shaped billet casting base quality by the measure that total process protective is cast, very meaningful for the kind and the quality that enlarge H shaped steel.
Claims (9)
1. carry out the method for protected casting for shaped blank continuous casting with single immersed nozzle; it is characterized in that; web center in the casting for shaped blank continuous crystallizer is inserted single bilateral hole submersed nozzle and is cast; submersed nozzle top in bilateral hole links to each other the airtight beam passage of formation between tundish and crystallizer by quick-changing mechanism with filling pipe end in the tundish.
2. as claimed in claim 1ly carry out the method for protected casting for shaped blank continuous casting with single immersed nozzle, it is characterized in that, the filling pipe end top is carried out the beam flow-control and is realized liquid level control in the crystallizer with this with stopper.
3. as claimed in claim 1ly carry out the method for protected casting for shaped blank continuous casting, it is characterized in that, utilize quick-changing mechanism can carry out the fast online replacement of submersed nozzle in the casting cycle with single immersed nozzle.
4. the device of using the method for single immersed nozzle casting for shaped blank continuous as claimed in claim 1 comprises tundish (1), bilateral hole submersed nozzle (6) and special-shaped billet crystallizer (5); Described tundish (1) inside is provided with filling pipe end (2) and corresponding stopper (3); The tundish bottom also has quick-changing mechanism (8) and submersed nozzle (6); Described submersed nozzle (6) links to each other by the interior filling pipe end (2) of quick-changing mechanism (8) bottom tundish (1) and tundish, and submersed nozzle (6) inserts special-shaped billet crystallizer (5) web centre position.
5. the device of using the method for single immersed nozzle casting for shaped blank continuous as claimed in claim 4 is characterized in that, above-mentioned tundish (1) is provided with 1-6 filling pipe end and corresponding 1-6 stopper.
6. the device of using the method for single immersed nozzle casting for shaped blank continuous as claimed in claim 4 is characterized in that, is connected with 1-3 standby submersed nozzle on the above-mentioned quick-changing mechanism.
7. the device of using the method for single immersed nozzle casting for shaped blank continuous as claimed in claim 4 is characterized in that, above-mentioned quick-changing mechanism is the 1-6 cover, and submersed nozzle is 1-6.
8. the device of using the method for single immersed nozzle casting for shaped blank continuous as claimed in claim 4 is characterized in that, submersed nozzle adopts the design of flat bilateral outlet.
9. the device of using the method for single immersed nozzle casting for shaped blank continuous as claimed in claim 4 is characterized in that, is connected with guard plate on the quick-changing mechanism (8) of tundish (1) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710014826 CN101091982A (en) | 2007-07-17 | 2007-07-17 | Method and device for carrying out protected casting for shaped blank continuous casting by using single immersed nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710014826 CN101091982A (en) | 2007-07-17 | 2007-07-17 | Method and device for carrying out protected casting for shaped blank continuous casting by using single immersed nozzle |
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| CN101091982A true CN101091982A (en) | 2007-12-26 |
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| CN 200710014826 Pending CN101091982A (en) | 2007-07-17 | 2007-07-17 | Method and device for carrying out protected casting for shaped blank continuous casting by using single immersed nozzle |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218512A (en) * | 2011-06-01 | 2011-10-19 | 山西太钢不锈钢股份有限公司 | Method for replacing tundish of crystallizer at high liquid level |
| CN104567428A (en) * | 2014-12-30 | 2015-04-29 | 朱兴发 | Flow-controllable orifice with three uniformly distributed holes for high-temperature liquid slag |
| CN108393480A (en) * | 2018-05-17 | 2018-08-14 | 山东钢铁股份有限公司 | A kind of herringbone fashion suitable for Profiled Slab CCM full guard casting shunts the mouth of a river |
| CN108555274A (en) * | 2018-05-29 | 2018-09-21 | 马鞍山尚元冶金科技有限公司 | Hot Metal in Beam Blank tundish quick change method |
| CN109304432A (en) * | 2018-11-12 | 2019-02-05 | 莱芜钢铁集团银山型钢有限公司 | A kind of the single-point unequal protection pouring device and application method of ultra-thin big specification Aluminum steel Hot Metal in Beam Blank |
| CN110605380A (en) * | 2019-09-23 | 2019-12-24 | 山东钢铁股份有限公司 | Slab caster and slab tundish quick flow blocking device thereof |
| 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 |
| CN113857450A (en) * | 2021-08-20 | 2021-12-31 | 山东钢铁集团日照有限公司 | Method for preventing medium plate blank continuous casting machine from bonding steel leakage |
| CN115026255A (en) * | 2022-06-21 | 2022-09-09 | 湖南华菱湘潭钢铁有限公司 | Steel slab continuous casting method for tundish hot-exchange continuous casting |
-
2007
- 2007-07-17 CN CN 200710014826 patent/CN101091982A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218512A (en) * | 2011-06-01 | 2011-10-19 | 山西太钢不锈钢股份有限公司 | Method for replacing tundish of crystallizer at high liquid level |
| CN102218512B (en) * | 2011-06-01 | 2012-12-26 | 山西太钢不锈钢股份有限公司 | Method for replacing tundish of crystallizer at high liquid level |
| CN104567428A (en) * | 2014-12-30 | 2015-04-29 | 朱兴发 | Flow-controllable orifice with three uniformly distributed holes for high-temperature liquid slag |
| CN108393480A (en) * | 2018-05-17 | 2018-08-14 | 山东钢铁股份有限公司 | A kind of herringbone fashion suitable for Profiled Slab CCM full guard casting shunts the mouth of a river |
| CN108555274A (en) * | 2018-05-29 | 2018-09-21 | 马鞍山尚元冶金科技有限公司 | Hot Metal in Beam Blank tundish quick change method |
| CN108555274B (en) * | 2018-05-29 | 2023-10-13 | 马鞍山尚元冶金科技有限公司 | Quick-changing method for special-shaped blank tundish |
| CN109304432A (en) * | 2018-11-12 | 2019-02-05 | 莱芜钢铁集团银山型钢有限公司 | A kind of the single-point unequal protection pouring device and application method of ultra-thin big specification Aluminum steel Hot Metal in Beam Blank |
| CN110605380A (en) * | 2019-09-23 | 2019-12-24 | 山东钢铁股份有限公司 | Slab caster and slab tundish quick flow blocking device thereof |
| 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 |
| CN113857450A (en) * | 2021-08-20 | 2021-12-31 | 山东钢铁集团日照有限公司 | Method for preventing medium plate blank continuous casting machine from bonding steel leakage |
| CN115026255A (en) * | 2022-06-21 | 2022-09-09 | 湖南华菱湘潭钢铁有限公司 | Steel slab continuous casting method for tundish hot-exchange continuous casting |
| CN115026255B (en) * | 2022-06-21 | 2023-09-05 | 湖南华菱湘潭钢铁有限公司 | Continuous casting method for steel slab with tundish hot-changing casting |
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Open date: 20071226 |