CN201436111U - Wide slab continuous casting crystallizer immersion water mouth - Google Patents
Wide slab continuous casting crystallizer immersion water mouth Download PDFInfo
- Publication number
- CN201436111U CN201436111U CN200920077324XU CN200920077324U CN201436111U CN 201436111 U CN201436111 U CN 201436111U CN 200920077324X U CN200920077324X U CN 200920077324XU CN 200920077324 U CN200920077324 U CN 200920077324U CN 201436111 U CN201436111 U CN 201436111U
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- water mouth
- mouth
- continuous casting
- river
- crystallizer
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model belongs to the continuous casting refractory material field, especially relates to a crystallizer immersion water mouth. A wide slab continuous casting crystallizer immersion water mouth comprises an inserting type water mouth body (1); both sides of the inserting type water mouth body (1) are symmetrically arranged with water mouth side holes (2); the inserting type water mouth body (1) is flat shaped; the water mouth side holes (2) are rectangular holes inclined downwardly; the bottom of the inserting type water mouth body (1) is a sunken bottom (3); The utility model designs all parameters reasonably aiming at the slab continuous casting crystallizer with drawing speed of 0.7-1.3m/min and section area of 220-300 X 1200-2300 mm2, obviously improves the upper molten steel circulation status in the crystallizer, improves the upward-floating rate of impurities in steel, increases the water mouth region slag generating area, improves the melting and flowing uniformity of the protection slag, and improves the surface and internal quality of wide slab casting billet.
Description
Technical field
The utility model belongs to the continuous casting fire resisting material field, relates in particular to a kind of crystallizer submersed nozzle.
Background technology
The exploitation of hot-loading and hot-conveying, continuous casting and rolling, sheet billet (band) continuous casting, continuous casting rolling technology proposes higher requirement to the surface and the internal soundness of strand.Lobe is one of modal mass defect of continuous casting steel billet, slight longitudinal crack can not exert an influence to next procedure after the slab finishing, serious longitudinal crack can make the monoblock slab scrap, even causes the lobe bleed-out in continuous casting production process, brings serious harm for equipment and production.The reason that produces about lobe had a lot of researchs; the major influence factors of conclude has: the composition of molten steel and watering property, crystallizer cooling situation, stretch into aspects such as the formula mouth of a river, covering slag and continuous casting process operating parameter, wherein the formula that the stretches into gate structure form of the Cai Yonging requirement of whether satisfying continuous casting process has significant effects to slab quality.This is because under pulling rate and cast section condition; stretch into formula gate structure and size and determined the flow behavior of molten steel in crystallizer; the molten steel flow behavior has determined the molten steel temperature field again; and then influence the molten steel initial stage solidify, floating foreign probability in the performance of covering slag function and the molten steel, thereby influence slab quality.Therefore, carry out research that the crystallizer that adapts with it stretches into formula mouth of a river optimisation technique is that the continuous casting worker is concerned about and the emphasis of work always.
Whether the evaluation crystallizer stretches into the formula mouth of a river reasonable, mainly considers from three aspects: the 1) situation that is evenly distributed of liquid fluctuating size and covering slag in the crystallizer; 2) crystallizer internal upper part zone molten steel circulatory condition; 3) mouth of a river stream strand impact depth and inclusion floating situation.The characteristics of wide plate billet continuous casting machine crystallizer cast section are that flakiness ratio is big, and under the not too big condition of pulling rate, the stream thigh that stretches into the side opening outflow of the formula mouth of a river from crystallizer is difficult to impact the crystallizer leptoprosopy, can not form a recirculating zone that makes progress.Do not have to form race way upwards in the crystallizer, cause steel inclusion come-up difficulty on the one hand; The more important thing is that simultaneously to make mold liquid level inactive, the covering slag fusing is bad, can not guarantee to form enough melt cinder ponds, the lubricated and heat transfer control ability of unfavorable performance covering slag, steel slab surface longitudinal crack occurrence probability height.In addition, be the circular mouth of a river as adopting profile, mouth of a river outer wall and crystallizer wall pitch smaller, reduced should the zone the change top of the slag amass, also cause near the steel slab surface longitudinal crack of mold gap easily.Continuous casting crystallizer for plate billet influences the interior molten steel flow behavior mouth of a river of crystallizer design factor and comprises: 1) mouth of a river profile with stretching into the version that the bilateral hole is all adopted at the formula mouth of a river at present; 2) bottom, mouth of a river form has three kinds of forms: sunken bottom, flat and concave bottom; 3) STH shape has three kinds of shapes: circular hole, elliptical aperture and slot; 4) STH angle has upwards, and downward different angles are also arranged; 5) different STH areas.
By changing mouth of a river profile, bottom form and STH shape, STH angle and STH area, design stretching into the formula mouth of a river, can solve that the crystallizer internal upper part zone molten steel circulation that occurs in the wide plate base casting process is weak, liquid level is inactive and near the mouth of a river top of the slag amasss the steel slab surface longitudinal crack occurrence probability height of little initiation and the steel inclusion problems such as difficulty that float.Therefore, the collateral security product quality is set out, and designs the crystallizer that satisfies wide plate base continuous casting and stretches into the formula mouth of a river and just seem very important.
The utility model content
Technical problem to be solved in the utility model provides a kind of wide plate blank continuous casting crystallizer submersed nozzle, and this submersed nozzle satisfies pulling rate and is: 0.7～1.3m/min and crystallizer section are 220～300 * 1200～2300mm
2Continuous casting crystallizer for plate billet stretch into the formula mouth of a river; can strengthen crystallizer internal upper part molten steel circulation rate, promote steel inclusion come-up probability, it is long-pending to increase near the mouth of a river top of the slag; and improve the even fusing and the inflow condition of covering slag, reach the purpose that improves wide plate casting billet surface and internal soundness.
A kind of wide plate blank continuous casting crystallizer submersed nozzle, comprise and stretch into formula mouth of a river body, the described bilateral symmetry that stretches into formula mouth of a river body is furnished with mouth of a river side opening, described this body profile of the formula mouth of a river that stretches into is a flat, described mouth of a river side opening is a slot, the hole is downward-sloping, and the bottom of stretching into formula mouth of a river body is a sunken bottom.
Side opening downward-sloping inclined angle alpha in the described mouth of a river is 10～20 °.
Rectangular four limits of described mouth of a river side opening are round-corner transition, and transitional radius R is 5～30mm.
Side opening downward-sloping inclined angle alpha in the described mouth of a river is 15 °, and the area of mouth of a river side opening is 4800mm
2, be shaped as 48 * 100mm
2Rectangle, rectangle adjacent edge transitional radius R is 15mm.
The utility model is that 0.7～1.3m/min section is 220～300 * 1200～2300mm at pulling rate
2Continuous casting crystallizer for plate billet reasonably designed the parameters of submersed nozzle; improved crystallizer internal upper part molten steel circulatory condition significantly; improved steel inclusion come-up rate; it is long-pending to have increased the mouth of a river compartmentalization top of the slag; improve the fusing of covering slag and flowed into uniformity, improved wide plate casting billet surface and internal soundness.
Description of drawings
Schematic perspective view when Fig. 1 is installed on the crystallizer for the utility model wide plate blank continuous casting crystallizer submersed nozzle;
Fig. 2 is an internal structure schematic perspective view of the present utility model;
Fig. 3 is a vertical cut-away schematic view of the present utility model;
Fig. 4 is the side view of Fig. 3;
Fig. 5 is a mouth of a river side opening schematic diagram.
Among the figure: 1 stretches into formula mouth of a river body, 2 mouth of a river side openings, 3 sunken bottoms, 4 crystallizers.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
As Fig. 1; 2; 3; shown in 4; a kind of wide plate blank continuous casting crystallizer submersed nozzle; comprise and stretch into formula mouth of a river body 1; the described profile that stretches into formula mouth of a river body 1 is a flat; its bilateral symmetry is furnished with rectangular mouth of a river side opening 2; as shown in Figure 5; rectangular four limits are round-corner transition; transitional radius R is 5～30mm, and mouth of a river side opening 2 is downward-sloping, and inclined angle alpha is 10～20 °; the bottom of stretching into formula mouth of a river body 1 is a sunken bottom 3; the formula that the stretches into mouth of a river body 1 of flat has increased the distance between mouth of a river outer wall and crystallizer 4 copper coins, has improved the heat supply condition to covering slag, helps the fusing and the inflow of covering slag.
At section is 220 * 1200～2300mm
2Crystallizer choose the parameter of submersed nozzle: the inclined angle alpha of mouth of a river side opening 2=15 °, the area of mouth of a river side opening 2 is 4800mm
2, be shaped as 48 * 100mm
2Rectangle, rectangle adjacent edge transitional radius R=15mm, the setting of technological parameter: submersed nozzle insertion depth scope (side opening top, the mouth of a river to molten steel identity distance from) is: 135～175mm; The blowing argon gas weight range is: 15～35Lmin
-1
Claims (4)
1. wide plate blank continuous casting crystallizer submersed nozzle, comprise and stretch into formula mouth of a river body (1), the described bilateral symmetry that stretches into formula mouth of a river body (1) is furnished with mouth of a river side opening (2), it is characterized in that: described to stretch into formula mouth of a river body (1) profile be flat, described mouth of a river side opening (2) is a slot, the hole is downward-sloping, and the bottom of stretching into formula mouth of a river body (1) is sunken bottom (3).
2. wide plate blank continuous casting crystallizer submersed nozzle as claimed in claim 1 is characterized in that: the downward-sloping inclined angle alpha of described mouth of a river side opening (2) is 10～20 °.
3. wide plate blank continuous casting crystallizer submersed nozzle as claimed in claim 1 or 2 is characterized in that: rectangular four limits of described mouth of a river side opening (2) are round-corner transition, and transitional radius R is 5～30mm.
4. wide plate blank continuous casting crystallizer submersed nozzle as claimed in claim 3 is characterized in that: the downward-sloping inclined angle alpha of described mouth of a river side opening (2) is 15 °, and the area of mouth of a river side opening (2) is 4800mm
2, be shaped as 48 * 100mm
2Rectangle, rectangle adjacent edge transitional radius R is 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920077324XU CN201436111U (en) | 2009-06-26 | 2009-06-26 | Wide slab continuous casting crystallizer immersion water mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920077324XU CN201436111U (en) | 2009-06-26 | 2009-06-26 | Wide slab continuous casting crystallizer immersion water mouth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201436111U true CN201436111U (en) | 2010-04-07 |
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ID=42372567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920077324XU Expired - Fee Related CN201436111U (en) | 2009-06-26 | 2009-06-26 | Wide slab continuous casting crystallizer immersion water mouth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201436111U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104408287A (en) * | 2014-10-27 | 2015-03-11 | 重庆大学 | Continuous casting mold flux viscosity prediction method |
| CN105710361A (en) * | 2016-04-05 | 2016-06-29 | 本钢板材股份有限公司 | Submersed nozzle for wide slab continuous casing machine |
| US10478890B1 (en) | 2016-06-21 | 2019-11-19 | Nucor Corporation | Methods of billet casting |
-
2009
- 2009-06-26 CN CN200920077324XU patent/CN201436111U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104408287A (en) * | 2014-10-27 | 2015-03-11 | 重庆大学 | Continuous casting mold flux viscosity prediction method |
| CN104408287B (en) * | 2014-10-27 | 2017-11-28 | 重庆大学 | A kind of continuous crystallizer protecting slag viscosity estimation method |
| CN105710361A (en) * | 2016-04-05 | 2016-06-29 | 本钢板材股份有限公司 | Submersed nozzle for wide slab continuous casing machine |
| US10478890B1 (en) | 2016-06-21 | 2019-11-19 | Nucor Corporation | Methods of billet casting |
| US11148192B2 (en) | 2016-06-21 | 2021-10-19 | Nucor Corporation | Shroud for billet casting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100407 Termination date: 20160626 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |