CN102274962A - Immersion-type downspout used for crystallizer for thick plate blanks and large square blanks - Google Patents
Immersion-type downspout used for crystallizer for thick plate blanks and large square blanks Download PDFInfo
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- CN102274962A CN102274962A CN2011102541658A CN201110254165A CN102274962A CN 102274962 A CN102274962 A CN 102274962A CN 2011102541658 A CN2011102541658 A CN 2011102541658A CN 201110254165 A CN201110254165 A CN 201110254165A CN 102274962 A CN102274962 A CN 102274962A
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Abstract
The invention relates to an immersion-type downspout used for a crystallizer for thick plate blanks and large square blanks. The immersion-type downspout comprises a side wall, a bottom connected with the side wall, an inner cavity or a central hole enclosed by the side wall and the bottom in the vertical direction, and two side holes which are connected with the inner cavity and laterally symmetrical on the side wall, wherein the upper and the lower wall surfaces of the side holes respectively form an inclination angle in the horizontal direction; the immersion-type downspout is characterized in that the left and the right wall surfaces of the side holes incline from inside to outside and are outwardly flared. Since the left and the right wall surfaces of the side holes are outwardly flared, molten steel flowing out from the side holes of the downspout can move adjacent to two sides of the angle parts towards narrow surfaces under the guiding action of the flared inclination angle, so that the molten steel can be uniformly distributed on the whole narrow surfaces in the horizontal direction. The quality defects of cracks or aliquation and the like caused by non-uniform horizontal temperature and constituents can be prevented, and meanwhile, the high-temperature molten steel can directly run to the angle parts of the crystallizer, so that the problems of cold steel solidification, protective slag caking and the like generated due to undercooling of the angle parts can be effectively prevented.
Description
Technical field
The invention belongs to continuous-casting of steel billet crystallizer submersed nozzle device, the submersed nozzle device of crystallizer used (heavy slab herein is meant the continuous casting steel billet of thickness greater than 250mm, and bloom generally is meant the continuous casting square billet of strand cross dimension greater than 200mm * 200mm) when relating generally to heavy slab and bloom continuous casting.
Background technology
In the continuous pouring process of steel, need the molten steel in the tundish continuously be delivered in the crystallizer by submersed nozzle device by the refractory material preparation.Submersed nozzle can prevent not only that molten steel is exposed to and produce oxidation in the air, can also regulate the flow pattern of molten steel in crystallizer, and molten steel is solidified with state preferably in crystallizer.The assurance of slab quality and the direct motion of continuous casting process all with crystallizer in the molten steel flow behavior close contact is arranged, and the main means of molten steel flow behavior are exactly to select suitable submersed nozzle physical dimension to satisfy the requirement of pouring conditions such as crystallizer cast section, pulling rate and steel grade in the crystallization control device.It is generally acknowledged, whether rationally be exactly see when adopting this submerged nozzle whether crystallizer flow field satisfy following three points: the liquid fluctuating that (1) is suitable if weighing the submersed nozzle physical dimension, can avoid problems such as covering slag turnup and meniscus destruction, again can the validation slag; (2) transversely even temperature and component distributing of crystallizer can prevent that excessive generation lobe of thermal stress and uneven components from producing segregation, can avoid the local overcooling crust again; (3) the molten steel thermal center (-tre) is moved on as far as possible, can promote initial solidification shell rationally grow and be mingled with, effective come-up of bubble.
Under the prior art, the heavy slab crystallizer mainly adopts the submersed nozzle cast of bilateral hole; Bloom requires difference can adopt the through-type mouth of a river, the mouth of a river, bilateral hole and the four side opening mouths of a river according to cast.The mouth of a river, the bilateral hole agent structure that heavy slab and bloom adopted is basic identical, all form with symmetrical two side openings that link to each other with inner chamber by the inner chamber of vertical direction, side opening is aimed at crystallizer leptoprosopy center during cast, and the side opening shape can and be up and down that semicircle, centre are the nearly ellipse of rectangle for chamfering rectangle, circle, ellipse.An outstanding feature of the type side opening is, lower wall surface and horizontal direction are certain inclination angle on the side opening, but about two walls keep level, parallel with the wide face of crystallizer.When heavy slab crystallizer and bloom crystallizer adopt the cast of the existing mouth of a river, bilateral hole, because crystallizer leptoprosopy width is much larger than the width of mouth of a river side opening, and the side opening two side walls is vertical with leptoprosopy, thereby, when molten steel moves to the crystallizer leptoprosopy from the mouth of a river, can only jet position to the leptoprosopy, can not be distributed to whole leptoprosopy in the horizontal, make crystallizer temperature and composition transversely be difficult to evenly be easy to generate defectives such as longitudinal crack or component segregation.Particularly replenishing of high-temperature molten steel owing to itself be the two dimension cooling, flowed out less than the mouth of a river again in the bight, problems such as cold steel of knot or covering slag caking usually occur, had a strong impact on continuous casting process direct motion and continuous casting billet quality.
Summary of the invention
The technical problem to be solved in the present invention is; above-mentioned deficiency at prior art; a kind of heavy slab and bloom crystallizer submersed nozzle are provided; make and obtain molten steel flow pattern preferably in heavy slab and the bloom crystallizer; obtain even temperature and component distributing in the horizontal; effectively avoid the bight to tie production problems such as cold steel or covering slag caking, guarantee continuous casting process direct motion and slab quality.
For achieving the above object, technical scheme of the present invention is:
A kind of heavy slab and bloom crystallizer submersed nozzle, comprise sidewall, the bottom that links to each other with sidewall, mouth of a river opened upper end, sidewall and bottom surround the hollow ring intracoelomic cavity of vertical direction, offer two shapes, big or small identical on the sidewall, with intracavity inter-connection and along lumen centers line side opening axisymmetricly, lower wall surface is the plane and is the angle of inclination with horizontal direction on the side opening, and two walls are the plane about side opening; It is characterized in that: about side opening two walls by interior outward-dipping, be extend out horn-like.
Two walls are 5 °～45 ° by interior outward-dipping, inclination angle scope about side opening.
Side opening up and down side tilts by the interior outside while and downward or upward horizontal by-25 °～15 ° inclination angle.
The intracavity section at the mouth of a river is circle, ellipse or pancake; The bottom, the mouth of a river of inner chamber lower end is sunken bottom, flat or concave bottom.
With respect to prior art, there is following beneficial effect in bilateral of the present invention hole submersed nozzle:
Because side opening left and right sides wall has the inclination angle that extends out, the molten steel that flows out from mouth of a river side opening can make molten steel can be distributed to whole leptoprosopy uniformly in the horizontal extending out under the guide functions at inclination angle to two lateral movements of leptoprosopy near the bight.Can prevent mass defects such as crackle that molten steel transverse temperature and uneven components cause or segregation like this; simultaneously; can also make high-temperature molten steel directly move to the bight of crystallizer; effectively avoid the bight because of cast problems such as the cold steel of knot of crossing cold generation and covering slag cakings; make the crystallizer flow field reach comparatively desirable state, thereby better meet the production demand.
Description of drawings
Fig. 1 is the structural representation of bilateral of the present invention hole submersed nozzle;
Fig. 2 is that side opening A is to view;
Fig. 3 is that submersed nozzle B-B is to cutaway view;
Label is as follows in the accompanying drawing, 1-sidewall, 2-bottom, 3-inner chamber, 4-side opening.
The specific embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing 1-3, but do not limit the present invention.
Referring to Fig. 1～Fig. 3, a kind of heavy slab and bloom submersed nozzle comprise mouth of a river sidewall 1, and described mouth of a river sidewall 1 is the bottom 2 of sealing bottom, and bottom 2 can be convex, flat shape or spill.Sidewall 1 is an inner chamber 3 with the central space that bottom 2 surrounds, and the cross sectional shape of described inner chamber can be circle, ellipse or platypelloid type.Bottom 2 upsides that are positioned at mouth of a river body 1 have a contralateral exposure 4, and two side holes 4 communicates with mouth of a river inner chamber 3, equal and opposite in direction, and along inner chamber 3 center lines axisymmetricly.Lower wall surface is simultaneously from inside to outside toward having a down dip on the side opening 4, and is-25 °～15 ° angle with horizontal direction, as lower wall surface level on 0 ° the time.There is certain angle beta (5 °≤β≤45 °) from inside to outside in described side opening 4 two side walls, form a kind of two side walls outward-dipping, be the horn-like side opening that extends out, specifically as shown in Figure 3.
Above disclosed only is preferred embodiment of the present invention, can not limit the present invention's interest field certainly with this, and therefore the equivalence of being done according to the present patent application claim changes, and still belongs to protection scope of the present invention.
Claims (5)
1. heavy slab and bloom crystallizer submersed nozzle, comprise sidewall, the bottom that links to each other with sidewall, mouth of a river opened upper end, sidewall and bottom surround the hollow ring intracoelomic cavity of vertical direction, offer two shapes, big or small identical on the sidewall, with intracavity inter-connection and along lumen centers line side opening axisymmetricly, lower wall surface is the plane and is the angle of inclination with horizontal direction on the side opening, and two walls are the plane about side opening; It is characterized in that: about side opening two walls by interior outward-dipping, be extend out horn-like.
2. the mouth of a river according to claim 1 is characterized in that about side opening that two walls are 5 °～45 ° by interior outward-dipping, inclination angle scope.
3. the mouth of a river according to claim 1 and 2 is characterized in that side opening tilts by the interior outside while and horizontal by-25 °～15 ° inclination angle the side up and down downward or upward.
4. the mouth of a river according to claim 1 and 2 is characterized in that the intracavity section at the mouth of a river is circle, ellipse or pancake; The bottom, the mouth of a river of inner chamber lower end is sunken bottom, flat or concave bottom.
5. the mouth of a river according to claim 3 is characterized in that the intracavity section at the mouth of a river is circle, ellipse or pancake; The bottom, the mouth of a river of inner chamber lower end is sunken bottom, flat or concave bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102541658A CN102274962A (en) | 2011-08-31 | 2011-08-31 | Immersion-type downspout used for crystallizer for thick plate blanks and large square blanks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102541658A CN102274962A (en) | 2011-08-31 | 2011-08-31 | Immersion-type downspout used for crystallizer for thick plate blanks and large square blanks |
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| CN102274962A true CN102274962A (en) | 2011-12-14 |
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| CN2011102541658A Pending CN102274962A (en) | 2011-08-31 | 2011-08-31 | Immersion-type downspout used for crystallizer for thick plate blanks and large square blanks |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554208A (en) * | 2012-01-18 | 2012-07-11 | 中冶南方工程技术有限公司 | Submersed nozzle for bloom continuous casting crystallizer |
| CN102554158A (en) * | 2012-01-17 | 2012-07-11 | 中冶南方工程技术有限公司 | Arrangement structure for immersive water gap for large and square billet continuous casting crystallizer |
| CN102886515A (en) * | 2012-10-19 | 2013-01-23 | 中冶南方工程技术有限公司 | Continuous casting submerged entry nozzle capable of reducing molten steel impact |
| CN108345737A (en) * | 2018-02-05 | 2018-07-31 | 东北大学 | A kind of design method of bloom continuous casting eddy flow downspout |
| CN108495727A (en) * | 2015-11-10 | 2018-09-04 | 维苏威美国公司 | Continuous casting sprue with baffle |
Citations (4)
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| CN200991751Y (en) * | 2006-12-28 | 2007-12-19 | 鞍钢股份有限公司 | Four-hole submersed nozzle for continuous casting of bloom |
| CN201455252U (en) * | 2009-08-25 | 2010-05-12 | 鞍钢股份有限公司 | Medium-thin slab continuous casting submersed nozzle |
| CN201693145U (en) * | 2010-06-20 | 2011-01-05 | 武汉钢铁(集团)公司 | Nozzle of continuous casting tundish |
| CN202224648U (en) * | 2011-08-31 | 2012-05-23 | 中冶南方工程技术有限公司 | Submersed nozzle for crystallizer for thick plate blanks and blooms |
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2011
- 2011-08-31 CN CN2011102541658A patent/CN102274962A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200991751Y (en) * | 2006-12-28 | 2007-12-19 | 鞍钢股份有限公司 | Four-hole submersed nozzle for continuous casting of bloom |
| CN201455252U (en) * | 2009-08-25 | 2010-05-12 | 鞍钢股份有限公司 | Medium-thin slab continuous casting submersed nozzle |
| CN201693145U (en) * | 2010-06-20 | 2011-01-05 | 武汉钢铁(集团)公司 | Nozzle of continuous casting tundish |
| CN202224648U (en) * | 2011-08-31 | 2012-05-23 | 中冶南方工程技术有限公司 | Submersed nozzle for crystallizer for thick plate blanks and blooms |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554158A (en) * | 2012-01-17 | 2012-07-11 | 中冶南方工程技术有限公司 | Arrangement structure for immersive water gap for large and square billet continuous casting crystallizer |
| CN102554208A (en) * | 2012-01-18 | 2012-07-11 | 中冶南方工程技术有限公司 | Submersed nozzle for bloom continuous casting crystallizer |
| CN102886515A (en) * | 2012-10-19 | 2013-01-23 | 中冶南方工程技术有限公司 | Continuous casting submerged entry nozzle capable of reducing molten steel impact |
| CN102886515B (en) * | 2012-10-19 | 2014-11-26 | 中冶南方工程技术有限公司 | Continuous casting submerged entry nozzle capable of reducing molten steel impact |
| CN108495727A (en) * | 2015-11-10 | 2018-09-04 | 维苏威美国公司 | Continuous casting sprue with baffle |
| US10500636B2 (en) | 2015-11-10 | 2019-12-10 | Vesuvius Usa Corporation | Casting nozzle comprising flow deflectors |
| CN108345737A (en) * | 2018-02-05 | 2018-07-31 | 东北大学 | A kind of design method of bloom continuous casting eddy flow downspout |
| CN108345737B (en) * | 2018-02-05 | 2020-06-05 | 东北大学 | Design method of bloom continuous casting rotational flow water gap |
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Application publication date: 20111214 |