CN202291394U - Submersed nozzle for reducing turbulent flow in slab crystallizer - Google Patents
Submersed nozzle for reducing turbulent flow in slab crystallizer Download PDFInfo
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- CN202291394U CN202291394U CN2011204121350U CN201120412135U CN202291394U CN 202291394 U CN202291394 U CN 202291394U CN 2011204121350 U CN2011204121350 U CN 2011204121350U CN 201120412135 U CN201120412135 U CN 201120412135U CN 202291394 U CN202291394 U CN 202291394U
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Abstract
The utility model relates to the field of metallurgy continuous casting and especially relates to a submersed nozzle. A submersed nozzle for reducing turbulent flow in a slab crystallizer comprises a nozzle main body, wherein the nozzle main body is cylindrical in shape; a pair of upper outlets and a pair of lower outlets are symmetrically arranged on two sides of the nozzle main body; the cross sections of the upper outlets and the lower outlets are in rounded rectangular shape; the upper outlets are inclined downward; and the lower outlets are inclined upward. The submersed nozzle provided by the utility model is used for preventing molten steel coming from the submersed nozzle from directly impacting onto a narrow surface of the crystallizer and a primary solidified slab shell; the kinetic energy of the molten steel at the outlets is efficiently reduced; the turbulent flow in the crystallizer is reduced; the stability of liquid level is increased; the forming of a casting blank primary slab shell is boosted; the defect of internal quality of a casting blank is reduced; and meanwhile, the kinetic energy of the molten steel from the outlets is dispersed and the scouring to the slab shell of the narrow surface is greatly reduced, so that the possibility of steel leakage of the crystallizer is reduced and the stability of production is boosted.
Description
Technical field
The utility model relates to the metallurgical continuous casting field, relates in particular to a kind of submersed nozzle.
Background technology
In the casting process, submersed nozzle has played the effect of water conservancy diversion with the protection molten steel, in crystallizer, forms the uniform molten steel distribution of flow field and temperature, and cooling forms the uniform solidified shell of thickness through the crystallizer water-cooled.In order in crystallizer, to form stable initial solidification base shell, and avoid rolling up slag, the metallargist has designed various difform submersed nozzles, to obtain good Molten Steel Flow form and slab quality.In traditional submersed nozzle used, molten steel is the side opening back rectilinear motion that comes out from the mouth of a river, and the one side expansion flows to the leptoprosopy of crystallizer, and it becomes very strong impact to initial base hull shape.Be divided into upwards when flowing thigh arrival crystallizer leptoprosopy and flow thigh with downward two.Stream thigh upwards forms a whirlpool recirculating zone near liquid level; This refluxes the fluctuation of floating foreign and mold liquid level and volume slag is played fundamental influence; The superficial velocity of this backflow simultaneously also plays an important role to the fusing of covering slag; Therefore, last backflow has important relation with slab surface quality.And the recirculating zone that the crystallizer bottom forms with the top loop direction is opposite, scope is bigger, its intensity weakens along with the extension of downward distance, to the solidified shell important influence of crystallizer outlet.Simultaneously, the tiny bubble that is involved in the refluxed can adhere to and be mingled with along with molten steel together moves, and forms field trash at the solidification front of strand and assembles, and this phenomenon is very serious to the influence of the internal soundness of strand and subsequent handling.Therefore, when adopting diplopore mouth of a river cast slab, four big backflows in crystallizer all can impact the surface and the internal soundness of strand.Consider from the submersed nozzle angle; In order to produce high-quality strand and to guarantee the stable of cast, will accomplish following some: reduce the fluctuation of mold liquid level, reduce being involved in of covering slag; Avoid forming the impact of molten steel to solidified shell; And the dark excessively impact depth of molten steel, be unfavorable for bubble and be mingled with come-up, also to guarantee enough steel-passing amounts simultaneously.
Prior art discloses a kind of diplopore list mouth of a river among the Chinese patent CN91227348.8, diplopore list mouth of a river cast slab; Upper end, the mouth of a river is the conical funnel type; Middle-end is the oval mouth of a river, and the lower end is the whole extension of the delivery port goods delivery port that two levels is arranged or be directed downwards of back cover, can play the effect at the inner uniform distribution molten steel of crystallizer; But the molten steel of this submersed nozzle flows out the back and directly impacts the base shell, influences slab quality.
Summary of the invention
The utility model technical problem to be solved provides a kind of submersed nozzle that reduces the plate slab crystallizer internal turbulence; The hole that spues on this submersed nozzle is opposite with the inclination angle in the hole that spues down; Therefore two strands of molten steel can meet in crystallizer inside, and molten steel kinetic energy is dissipated, and have increased the stable of liquid level; Help the formation of strand initial solidification shell, reduced strand internal soundness defective.
The utility model is achieved in that a kind of submersed nozzle that reduces the plate slab crystallizer internal turbulence; Comprise mouth of a river main body; Mouth of a river main body is cylindrical, mouth of a river main body bilateral symmetry be provided with spue on a pair of the hole and a pair of under the hole that spues, on the spue hole and the rectangle of cross section, hole that spue down for the band rounding; On the hole that spues downward-sloping, the hole that spues down is inclined upwardly.
Also be provided with the molten steel guiding device in the main body of the described mouth of a river, the end face of said molten steel guiding device is a V-arrangement.
Spue on described the aperture, hole greater than under the aperture, hole that spues.
The downward-sloping angle in hole that spues on said is 0～45 °.
The acclivitous angle in hole that spues under said is 15 °～45 °.
The hole that spues on the utility model is opposite with the inclination angle in the hole that spues down, and therefore two strands of molten steel can meet in crystallizer inside, can dissipate through the laggard action of collision; Reduced the speed of molten steel stream thigh; Reduced stirring, not only can avoid molten steel to come out directly to impact crystallizer leptoprosopy and nascent solidified shell, and effectively reduce the kinetic energy of outlet molten steel from immersing the mouth of a river to crystallizer molten steel; Minimizing is in the inner turbulent flow of crystallizer; Increase the stable of liquid level, helped the formation of strand initial solidification shell, reduced strand internal soundness defective; Be dissipated because of molten steel kinetic energy simultaneously, the washing away also of base shell of leptoprosopy reduced greatly, reduced the possibility that the crystallizer bleed-out, be beneficial to the stable of production from the hole that spues.
Description of drawings
Fig. 1 reduces the submersed nozzle perspective view of plate slab crystallizer internal turbulence for the utility model;
Fig. 2 reduces the submersed nozzle schematic cross-section of plate slab crystallizer internal turbulence for the utility model;
Fig. 3 is a molten steel guiding device structural representation.
Among the figure: the hole that spues on 1 mouth of a river main body, 2,3 times holes that spue, 4 molten steel guiding devices.
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 the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification to 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.
Like Fig. 1, shown in 2; A kind of submersed nozzle that reduces the plate slab crystallizer internal turbulence comprises mouth of a river main body 1, and mouth of a river main body 1 is cylindrical; Mouth of a river main body 1 bilateral symmetry be provided with spue on a pair of hole 2 with a pair of under the hole 3 that spues; On the spue hole 2 and the rectangle of 3 cross sections, hole that spue down for the band rounding, on the hole 2 that spues downward-sloping, the hole 3 that spues down is inclined upwardly; The hole 2 downward-sloping angles that spue on said in the present embodiment are 0～45 °, and the hole 3 acclivitous angles that spue under said are 15 °～45 °.
As shown in Figure 3, the utility model can further describe into, also be provided with molten steel guiding device 4 in the described mouth of a river main body 1, the end face of said molten steel guiding device 4 is a V-arrangement.When molten steel arrived the bottom through the mouth of a river, molten steel respectively to two side flow, made the steel stream of both sides more evenly smooth and easy under the effect of molten steel guiding device 4.
In addition; In the utility model because on spue hole 2 with 3 holes, hole that spue down a fixed difference in height is arranged, the kinetic energy of the molten steel that two orifice flows that spue go out is also different; For the dissipation steel energy of flow as much as possible; Obtain stable flow field of molten steel, spue on therefore described 2 apertures, hole greater than under 3 apertures, hole that spue, and the area in two holes that spue is than increasing along with the increase of immersing mouth of a river insertion depth.
During casting; The molten steel that goes out at two orifice flows that spue that immerse the same side, the mouth of a river rushes at the crystallizer leptoprosopy with certain speed; Because on spue hole 2 opposite with the inclination angle in the hole 3 that spues down, therefore two strands of molten steel can meet in crystallizer inside, can dissipate through the laggard action of collision; Reduced the speed of molten steel stream thigh, reduced burst the impact of molten steel stream the crystallizer leptoprosopy.The synthetic molten steel of two stream thighs is divided into upwards and two downward backflows after arriving the crystallizer leptoprosopy with lower speed.The fluctuation that backflow upwards arrives behind the mold liquid level also reduces thereupon, reduced being involved in of covering slag, and less liquid fluctuating also helps the even formation of nascent solidified shell, reduces the generation of crackle.And downward stream thigh has been because the reduction of speed has reduced the scope of refluxed greatly, thereby helps bubble and floating foreign, reduced the gathering at casting blank solidification forward position field trash.Therefore the mouth of a river of the utility model has reduced the turbulent flow of the inner molten steel of crystallizer from energy dissipation, has increased the stable of liquid level, not only helps the formation of strand initial solidification shell, and reduces strand internal soundness defective.Be dissipated because of molten steel kinetic energy simultaneously, the washing away also of base shell of leptoprosopy reduced greatly, reduced the possibility that the crystallizer bleed-out, be beneficial to the stable of production from the hole that spues.
Claims (5)
1. submersed nozzle that reduces the plate slab crystallizer internal turbulence; It is characterized in that: comprise mouth of a river main body (1); Mouth of a river main body (1) is cylindrical, mouth of a river main body (1) bilateral symmetry be provided with spue on a pair of hole (2) and a pair of under the hole (3) that spues, on the spue hole (2) and the rectangle of cross section, hole (3) that spue down for the band rounding; On the hole (2) that spues downward-sloping, the hole (3) that spues down is inclined upwardly.
2. the submersed nozzle of minimizing plate slab crystallizer internal turbulence as claimed in claim 1 is characterized in that: also be provided with molten steel guiding device (4) in the described mouth of a river main body (1), the end face of said molten steel guiding device (4) is a V-arrangement.
3. according to claim 1 or claim 2 the submersed nozzle of minimizing plate slab crystallizer internal turbulence is characterized in that: aperture, the hole that spues on described (2) greater than under the aperture, hole (3) that spues.
4. the submersed nozzle of minimizing plate slab crystallizer internal turbulence as claimed in claim 3 is characterized in that: the hole that spues on said (2) downward-sloping angle is 0～45 °.
5. the submersed nozzle of minimizing plate slab crystallizer internal turbulence as claimed in claim 3 is characterized in that: the acclivitous angle in hole (3) that spues under said is 15 °～45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204121350U CN202291394U (en) | 2011-10-26 | 2011-10-26 | Submersed nozzle for reducing turbulent flow in slab crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204121350U CN202291394U (en) | 2011-10-26 | 2011-10-26 | Submersed nozzle for reducing turbulent flow in slab crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202291394U true CN202291394U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204121350U Expired - Fee Related CN202291394U (en) | 2011-10-26 | 2011-10-26 | Submersed nozzle for reducing turbulent flow in slab crystallizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202291394U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458196A (en) * | 2015-12-07 | 2016-04-06 | 东北大学 | Nozzle for double-roll thin-strip continuous casting |
-
2011
- 2011-10-26 CN CN2011204121350U patent/CN202291394U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458196A (en) * | 2015-12-07 | 2016-04-06 | 东北大学 | Nozzle for double-roll thin-strip continuous casting |
| CN105458196B (en) * | 2015-12-07 | 2018-05-29 | 东北大学 | A kind of twin-roll thin strip continuous casting water nozzle |
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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: 20120704 Termination date: 20201026 |
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| CF01 | Termination of patent right due to non-payment of annual fee |