CN201329417Y - Multi-port submerged nozzle for sheet billet continuous casting - Google Patents
Multi-port submerged nozzle for sheet billet continuous casting Download PDFInfo
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- CN201329417Y CN201329417Y CNU2008202213430U CN200820221343U CN201329417Y CN 201329417 Y CN201329417 Y CN 201329417Y CN U2008202213430 U CNU2008202213430 U CN U2008202213430U CN 200820221343 U CN200820221343 U CN 200820221343U CN 201329417 Y CN201329417 Y CN 201329417Y
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- continuous casting
- submersed nozzle
- expansion segment
- submerged nozzle
- sheet blank
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Abstract
The utility model belongs to the continuous casting technology, and mainly relates to a multi-port submerged nozzle for sheet billet continuous casting. The submerged nozzle comprises a conical funnel entrance 1, a cylindrical changeover portion 2, an expanding section 3 which can gradually enlarge area and is of flgure-eights shape, and an exit section 5 which has 2 to 4 diverter bodies 4 and is of semicircular shape or trapezoid shape. In the utility model, the diverter bodies are arranged on the submerged nozzle to lead melted steel to flow out in 3 to 5 parts, which can lower melted steel liquid level, in particular to fluctuation and volatility near meniscus, upper shifts a high-temperature zone, improves the melting conditions of protection dregs, enhances the billet steel quality, lowers the bleed-out accidents, reduces the stream impact and is convenient for increasing the throwing speed.
Description
Technical field
The utility model belongs to continuous casting technology, relates generally to a kind of sheet blank continuous casting multiple exit submersed nozzle.
Background technology
In the continuous casting process of molten steel, submersed nozzle imports molten steel in the crystallizer by tundish, except having the effect that prevents molten steel oxidation, main is control and improves the flow regime of molten steel in crystallizer, reduce molten steel to the impact of solidified shell, the heat that disperses beam to bring into, impel the base shell that in crystallizer, forms stable, evenly grow and promote field trash in crystallizer, to float.Compare with common continuous casting, the characteristics of sheet blank continuous casting are that the crystallizer space is little, and pulling rate is fast, invar liquid surface wave takes place easily roll up slag greatly and open molten steel splash phenomenon when watering, and accident such as the unreasonable easy generation bleedout of Flow Field Distribution, thereby the structure of used submersed nozzle there is higher requirement.Because crystallizer is narrow, the size-constrained system in the mouth of a river can only be made pancake; Its inner-cavity structure can guarantee enough molten steel flows, makes again to have a rational flow field in the crystallizer.
At present China's sheet blank continuous casting has had large development, built up ten surplus rule production line.Except the use mouths of a river, four holes such as Tang Gang FTSR, other most of sheet billet steel mills such as pearl steel, Baogang etc. all use two hole submersed nozzles with both sides tapping, and domestic many units have developed multiple two hole submersed nozzles, as CN91227348.8, CN92223447.7, CN200410060353.7, CN200420090590.3.After molten steel was flowed out by the submersed nozzle both sides, the base shell that directly impacts molten steel and solidify especially not only influenced billet quality under the condition of high pulling rate, and accident such as bleed-out takes place easily.More than the submersed nozzle in two holes such as CN200520012263.0 sheet blank continuous casting with four hole submersed nozzles, by improving the Da Nieli sheet blank continuous casting with the flat mouth of a river of four perforates, will on spue hole cross section form to become from inside to outside and shrink gradually, can enliven the crystallizer molten steel bath surface, uniform temperature distributes, eliminate low pressure and take out and draw district and backflow vortex, improve mouth of a river service life; But it only uses in the sheet blank continuous casting of slab thickness more than or equal to 90mm, though its flow field form is better than the two side holes submersed nozzle, its version can not be used on the thick CSP conticaster less than 90mm of base; The CN99204644.0 submerged nozzle for continuous casting of thin slabs is separated into upwash thigh and following dumping tower tray thigh according to the theory that dissipates with steel stream, weaken stream strand kinetic energy and impulsive force, and it is collided to dissipate kinetic energy mutually in crystallizer, thereby when reducing the mold liquid level turbulent flow with the low impact of steel stream to solidified shell, but its profile, main channel are shaped as flat ellipse, are difficult to use to some extent in practice.
Summary of the invention
The purpose of this utility model provides a kind of sheet blank continuous casting multiple exit submersed nozzle; be provided with two with upper outlet by immerse section at the mouth of a river; dispersed steel stream weakens it to base shell impulsive force; reduce near especially fluctuating and the fluctuation of meniscus of molten steel in mold liquid level; make and move on the high-temperature region and evenly distribution; and then improve the melting conditions of covering slag, improve billet quality, reduce the bleedout accident.
The utility model is finished the technical scheme that its invention task taked: a kind of sheet blank continuous casting multiple exit submersed nozzle has a conical entrance, a cylindrical changeover portion, cross section by expansion segment and the section rounded or trapezoidal outlet section of circle to the flat elliptic transition; Outlet section has 2-4 branch fluid, makes the expansion segment lower end have rational water conservancy diversion direction, divides fluid and horizontal angle in 5-45 ° of scope, and the shape of cross section shape of dividing fluid can be that ellipse, flat ellipse or drift angle are rounded triangle; According to steel billet section and casting speed, rationally parameters such as the number of adjustment branch fluid, structure configuration, shape satisfy the needs of cast at a high speed.
The expansion segment sidewall is the expansion of " eight " font.
The angle α of expansion segment lower end training wall and level is 5-45 °.
The angle β of the sidewall of expansion segment and center line is 6-10.5 °.
The sheet blank continuous casting that the utility model proposes by a plurality of minutes fluids are set at outlet section, plays the purpose of optimizing flow field of molten steel with the multiple exit submersed nozzle, makes the molten steel in the crystallizer have rational flowing.The utility model has reduced the molten steel beam to mold liquid level and the impact of solidified shell, helps strand and evenly solidifies, and guarantees the intensity and the quality of base shell, reduces the generation of bleedout accident.Because the utility model has reduced the beam impact, therefore help improving casting speed.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1 submersed nozzle.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is embodiment 2 submersed nozzle structural representations.
Fig. 4 is the A-A profile of Fig. 3.
Fig. 5 is embodiment 3 submersed nozzle structural representations.
Fig. 6 is the A-A profile of Fig. 5.
Fig. 7 is embodiment 4 submersed nozzle structural representations.
Fig. 8 is the A-A profile of Fig. 7.
Among the figure, 1, entrance, 2, changeover portion, 3, expansion segment, 4, divide fluid, 5, outlet section, the angle of α, expansion segment lower end training wall and level, the angle of β, expansion segment sidewall and center line.
The specific embodiment
In conjunction with the accompanying drawing that provides, embodiment is specified to the utility model.
As shown in Figure 1, it provides the schematic diagram of a kind of sheet blank continuous casting with four outlet submersed nozzles.This submersed nozzle has conical entrance 1, one a cylindrical changeover portion 2, and area enlarges gradually, the linear expansion segment 3 that elongates, and the section of expansion segment is flat ellipse, as shown in Figure 2; The angle β of expansion segment sidewall and center line is 8.4 °, and the angle α of expansion segment lower end training wall and level is 5 °; The mouth of a river has 3 branch fluids 4 and rounded outlet section 5, and dividing has two to be flat ellipse, to be symmetrically distributed the another one ovalize according to center line in the fluid.The utility model makes molten steel be 4 plumes and goes out by 3 branch fluids are set at the submersed nozzle outlet section.
Fig. 3 provides a kind of sheet blank continuous casting and exports the submersed nozzle schematic diagrames with three.This submersed nozzle has conical entrance 1, one a cylindrical changeover portion 2, and area enlarges, is the expansion segment 3 of " eight " font gradually, and the section of expansion segment is flat ellipse, as shown in Figure 4; The angle β of expansion segment sidewall and center line is 6 °, and the angle α of expansion segment lower end training wall and level is 30 °; Have two branch fluids 4 and be trapezoidal outlet section 5, divide 4 two branch fluids 4 of fluid to be symmetrically distributed according to center line, with the center line angle be 45 °.The utility model makes molten steel be 3 plumes and goes out by 2 branch fluids are set at the submersed nozzle outlet section.
Fig. 5 provides a kind of sheet blank continuous casting and exports the submersed nozzle schematic diagrames with five.This submersed nozzle has conical entrance 1, one a cylindrical changeover portion 2, and area enlarges, is the expansion segment 3 of " eight " font gradually, and the section of expansion segment is flat ellipse, as shown in Figure 6; The angle β of expansion segment sidewall and center line is 8.2 °, and expansion segment lower end training wall and horizontal angle α are 45 °; Have 4 two component flow 4 and be trapezoidal outlet section 5, two component flow and center line angle and be respectively 38 ° and 25 °, 4 branch fluids are symmetrically distributed according to center line.The utility model makes molten steel be 5 plumes and goes out by at the submersed nozzle outlet section branch fluid being set.
Fig. 7 provides a kind of sheet blank continuous casting and exports the submersed nozzle schematic diagrames with four.This submersed nozzle has conical entrance 1, one a cylindrical changeover portion 2, and area enlarges gradually, the linear expansion segment 3 that elongates, and the section of expansion segment is flat ellipse.As shown in Figure 8; The angle β of expansion segment sidewall and center line is 10.5 °, and the angle α of expansion segment lower end training wall and level is 30 °; Have 3 branch fluids 4 and rounded outlet section 5, dividing has two to be flat ellipse, to be symmetrically distributed according to center line in the fluid, and another one is that the drift angle rounded triangle is divided fluid.The utility model makes molten steel be 4 plumes and goes out by 3 branch fluids are set at the submersed nozzle outlet section.
Claims (5)
1, a kind of sheet blank continuous casting multiple exit submersed nozzle, it has a conical entrance (1), a cylindrical changeover portion (2), cross section is by expansion segment (3) and the section rounded or trapezoidal outlet section (5) of circle to the flat elliptic transition; It is characterized in that: described outlet section comprises 2-4 branch fluid (4).
2, sheet blank continuous casting according to claim 1 multiple exit submersed nozzle is characterized in that: divide the shape of cross section of fluid (4) to be ellipse, flat ellipse or drift angle rounded triangle.
3, sheet blank continuous casting according to claim 1 multiple exit submersed nozzle is characterized in that: the sidewall of expansion segment (3) is the expansion of " eight " font.
4, sheet blank continuous casting according to claim 1 multiple exit submersed nozzle is characterized in that: the angle α of expansion segment (3) lower end training wall and level is 5-45 °.
5, sheet blank continuous casting according to claim 1 multiple exit submersed nozzle, the angle β that it is characterized in that expansion segment (3) sidewall and center line is 6-10.5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202213430U CN201329417Y (en) | 2008-11-27 | 2008-11-27 | Multi-port submerged nozzle for sheet billet continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202213430U CN201329417Y (en) | 2008-11-27 | 2008-11-27 | Multi-port submerged nozzle for sheet billet continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201329417Y true CN201329417Y (en) | 2009-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202213430U Expired - Lifetime CN201329417Y (en) | 2008-11-27 | 2008-11-27 | Multi-port submerged nozzle for sheet billet continuous casting |
Country Status (1)
| Country | Link |
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| CN (1) | CN201329417Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966567A (en) * | 2010-10-19 | 2011-02-09 | 维苏威高级陶瓷(苏州)有限公司 | Submersed nozzle for thin slab |
| CN103231046A (en) * | 2013-04-25 | 2013-08-07 | 辽宁科技大学 | Quasi-four-hole submersed nozzle for FTSC (flexible thin-slab casting) mold |
| CN107457389A (en) * | 2017-07-24 | 2017-12-12 | 嘉善优联物流装备有限公司 | A kind of casting device for being used to produce wire |
| CN113226594A (en) * | 2019-01-21 | 2021-08-06 | 黑崎播磨株式会社 | Immersion nozzle |
-
2008
- 2008-11-27 CN CNU2008202213430U patent/CN201329417Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966567A (en) * | 2010-10-19 | 2011-02-09 | 维苏威高级陶瓷(苏州)有限公司 | Submersed nozzle for thin slab |
| CN103231046A (en) * | 2013-04-25 | 2013-08-07 | 辽宁科技大学 | Quasi-four-hole submersed nozzle for FTSC (flexible thin-slab casting) mold |
| CN107457389A (en) * | 2017-07-24 | 2017-12-12 | 嘉善优联物流装备有限公司 | A kind of casting device for being used to produce wire |
| CN113226594A (en) * | 2019-01-21 | 2021-08-06 | 黑崎播磨株式会社 | Immersion nozzle |
| CN113226594B (en) * | 2019-01-21 | 2023-03-14 | 黑崎播磨株式会社 | Immersion nozzle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091021 |
|
| CX01 | Expiry of patent term |