CN204912747U - Crystallizer vortex immersion nozzle - Google Patents
Crystallizer vortex immersion nozzle Download PDFInfo
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- CN204912747U CN204912747U CN201520686391.7U CN201520686391U CN204912747U CN 204912747 U CN204912747 U CN 204912747U CN 201520686391 U CN201520686391 U CN 201520686391U CN 204912747 U CN204912747 U CN 204912747U
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- crystallizer
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Abstract
The utility model discloses a crystallizer vortex immersion nozzle, including fire -resistant pipeline, fire -resistant pipeline afterbody is provided with the tapping hole, it is intersegmental at a distance from the little internal diameter section of arranging in big internal diameter section with at least two that the refractory tube way has imperial palace footpath section, little internal diameter section inner wall is provided with a plurality of vortex grooves. Through the crystallizer vortex immersion nozzle who adopts above -mentioned structure, can eliminate effectively the molten steel bias flow phenomenon, mixing molten steel, reduce the stream thigh speed of molten steel to optimize interior flow field of slab continuous casting crystallizer and temperature field, the liquid level that reduces the interior molten steel of crystallizer is undulant, according to water mould experimental result, under the same condition of other working condition, adopt the crystallizer liquid level fluctuation at this kind of mouth of a river to reduce more than 30% than the conventional mouth of a river, the molten steel velocity of flow in the crystallizer reduces more than 20%, and bias flow phenomenon in the mouth of a river disappears basically, still be favorable to reducing the liquid level fluctuation of crystallizer, promote the come -up of inclusion to improve the casting blank quality.
Description
Technical field
The utility model relates to steel industry metallurgical continuous casting field, refers to a kind of crystallizer flow-disturbing submersed nozzle particularly.
Background technology
The continuous pouring of liquid molten steel is the process molten steel with certain degree of superheat being become the effigurate solid strand of tool by water mold continuous coo1ing, the tundish of molten steel from upstream, between tundish and crystallizer, injects in crystallizer by submersed nozzle.The effect of submersed nozzle prevents secondary oxidation of steel, splashing, control from entering the distribution of steel stream in crystallizer in crystallizer; avoid hot-fluid to concentrate being beneficial to the homoepitaxial of base shell; eliminate casting billet surface lobe, be conducive to the floating of field trash and prevent covering slag to be involved in.The shape of submersed nozzle is the important factor in order of the steel stream flowing affected in crystallizer, field trash and bubble floating.In the casting system using sliding plate flow-control, steel stream at the mouth of a river inner by time there will be Biased flow phenomenon in various degree, bias current can produce ill effect to the flowing of Mold, be unfavorable for the uniformity in crystallizer flow field and temperature field.Bias current can cause following drawback usually: relatively concentrate local at molten steel stream stock, steel Flow Velocity is larger, comparatively large to the local assault near mould at narrow, and the meniscus near leptoprosopy may be caused to occur, and larger liquid fluctuating causes cast to have some setbacks or liquid level slag; In the fewer place of molten steel stream stock, there will be the dead band of molten steel flow, molten steel temperature is lower, and this steel liquid flow state is also unfavorable for crystallizer transverse temperature homogenising, thus causes the uneven of shell growth, and causes strand crackle further.And steel stream flow velocity larger time, the impact depth of steel stream also can be larger, be unfavorable for field trash and bubble in molten steel floating remove.
Enable submersed nozzle play its metallurgy action preferably, just must carry out appropriate design to immersion type water nozzle structure shape, thus obtain the crystallizer Flow and heat flux being adapted to current pouring condition.The agent structure of used immersed nozzle for continuous casting mould is refractory material pipeline, and the diameter substantial constant of pipeline is constant, and in the pipeline of the mouth of a river vertically downward, the bottom side opening then flowing through pipeline enters in crystallizer molten steel.The mouth of a river of this structure does not produce any impact substantially on the molten steel flow in crystallizer, helpless for the Biased flow phenomenon of molten steel Biased flow phenomenon in the mouth of a river.
Summary of the invention
The purpose of this utility model is exactly the defect that will overcome the existence of existing submersed nozzle, there is provided a kind of and effectively can eliminate the Biased flow phenomenon of molten steel, mix the stream stock speed of molten steel, reduction molten steel, thus optimize continuous casting crystallizer for plate billet flow field and temperature field, reduce the crystallizer flow-disturbing submersed nozzle of the liquid fluctuating of Mold.
For achieving the above object, crystallizer flow-disturbing submersed nozzle designed by the utility model, comprise fire resisting duct, described fire resisting duct afterbody is provided with tapping hole, and its special character is: described fire resisting duct has the little internal diameter section that large diameter section and at least two spacer segments are arranged in large diameter section; Described little internal diameter section inwall is provided with some flow-disturbing grooves.
Further, described some flow-disturbing grooves are in tilted layout relative to the axial line of fire resisting duct, and are uniformly distributed along described little internal diameter section inwall circumference.Like this, can lead to through molten steel herein, make it produce eddy flow.
Further, the flow-disturbing groove incline direction adjacent described little internal diameter section inwall arranged is contrary.Like this, the flow velocity through molten steel herein can be reduced, and produce disturbance, even molten steel.
Further, described flow-disturbing groove is provided with 4 ~ 6 along little internal diameter section inwall, and the groove width of every bar flow-disturbing groove is 15 ~ 25mm, and bottom land and the large diameter section inwall of every bar flow-disturbing groove are in circumferentially same.Like this, the flow-disturbing effect of this place to molten steel can be optimized, reduce the liquid fluctuating in crystallizer.
Further, the diameter of described little internal diameter section is 70 ~ 90% of large diameter section diameter.Like this, the Biased flow phenomenon of molten steel in fire resisting duct can be alleviated.
Further, described little internal diameter segment length is 50 ~ 100mm, adjacent little internal diameter section be spaced apart 50 ~ 100mm.
Action principle of the present utility model is as follows: designed crystallizer flow-disturbing submersed nozzle, after molten steel enters fire resisting duct, when flowing through reduced diameter section, because pipe wall internal diameters reduces, molten steel is gathered in the middle of fire resisting duct, like this, the situation of molten steel bias current in fire resisting duct can be alleviated; Simultaneously, originally along inwall directly under part molten steel flow through flow-disturbing groove time path change, certain rotation is produced along flow-disturbing groove, when molten steel flows through next section of reduced diameter section, because the direction of flow-disturbing groove is contrary, part molten steel can produce and rotation contrary above, the speed of molten steel stream can be made like this to decline, alleviate the liquid fluctuating in crystallizer, the inner fully mixing at the mouth of a river of molten steel stream can also be made, produce and alleviate the effect even eliminating bias current.
The utility model has the advantage of: by adopting the crystallizer flow-disturbing submersed nozzle of said structure, effectively can eliminate the stream stock speed of the Biased flow phenomenon of molten steel, mixing molten steel, reduction molten steel, thus optimize continuous casting crystallizer for plate billet flow field and temperature field, reduce the liquid fluctuating of Mold; According to hydraulic model trial result, when other working conditions are identical, adopt the liquid level fluctuation of crystallizer at this kind of mouth of a river to reduce by more than 30% than the conventional mouth of a river, the molten steel flow velocity in crystallizer reduces by more than 20%, and mouth of a river Biased flow phenomenon disappears substantially; In crystallizer, thermo parameters method is relatively uniform, is conducive to the homoepitaxial of base shell, reduces the incidence of crackle, also helps the liquid fluctuating reducing crystallizer, promotes the floating of field trash, thus improves slab quality.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of the utility model crystallizer flow-disturbing submersed nozzle.
Fig. 2 is the deployed configuration schematic diagram of Fig. 1 medium-small diameter section 1.2.
Fig. 3 is the deployed configuration schematic diagram of Fig. 1 medium-small diameter section 1.21.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Crystallizer flow-disturbing submersed nozzle shown in Fig. 1 ~ 3, comprises the fire resisting duct 1 that tapping hole 3 immerses below crystallizer molten steel surface, and fire resisting duct 1 has the little internal diameter section 1.2 that large diameter section 1.1 and at least two spacer segments are arranged in large diameter section 1.1; Little internal diameter section 1.2 inwall to be in tilted layout 4 ~ 6 flow-disturbing grooves 2 relative to the axial line of fire resisting duct 1, and flow-disturbing groove 2 is uniformly distributed along little internal diameter section 1.2 inwall circumference.Flow-disturbing groove 2 incline direction that adjacent little internal diameter section 1.2 inwall is arranged is contrary; The groove width of every bar flow-disturbing groove 2 is 15 ~ 25mm, and bottom land and large diameter section 1.1 inwall of every bar flow-disturbing groove 2 are in circumferentially same; The diameter of little internal diameter section 1.2 is 70 ~ 90% of large diameter section 1.1 diameter; Little internal diameter section 1.2 length is 50 ~ 100mm, adjacent little internal diameter section 1.2 be spaced apart 50 ~ 100mm.
By adopting the crystallizer flow-disturbing submersed nozzle of said structure, effectively can eliminate the stream stock speed of the Biased flow phenomenon of molten steel, mixing molten steel, reduction molten steel, thus optimize continuous casting crystallizer for plate billet flow field and temperature field, reduce the liquid fluctuating of Mold; According to hydraulic model trial result, when other working conditions are identical, adopt the liquid level fluctuation of crystallizer at this kind of mouth of a river to reduce by more than 30% than the conventional mouth of a river, the molten steel flow velocity in crystallizer reduces by more than 20%, and mouth of a river Biased flow phenomenon disappears substantially; In crystallizer, thermo parameters method is relatively uniform, be conducive to the homoepitaxial of base shell, reduce the incidence of crackle, also help the liquid fluctuating reducing crystallizer, promote the floating of field trash, thus raising slab quality, with one produce per year steel 2,000,000 tons factory calculate, year economic benefit can reach more than 2,000,000 yuan.
Finally, it should be pointed out that above embodiment is only the more representational example of the utility model.Obviously, the utility model is not limited to above-described embodiment, can also have many distortion.Every according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all should think and belong to protection domain of the present utility model.
Claims (6)
1. a crystallizer flow-disturbing submersed nozzle, comprise fire resisting duct (1), described fire resisting duct (1) afterbody is provided with tapping hole (3), it is characterized in that: described fire resisting duct (1) has the little internal diameter section (1.2) that large diameter section (1.1) and at least two spacer segments are arranged in large diameter section (1.1); Described little internal diameter section (1.2) inwall is provided with some flow-disturbing grooves (2).
2. crystallizer flow-disturbing submersed nozzle according to claim 1, it is characterized in that: described some flow-disturbing grooves (2) are in tilted layout relative to the axial line of fire resisting duct (1), and be uniformly distributed along described little internal diameter section (1.2) inwall circumference.
3. crystallizer flow-disturbing submersed nozzle according to claim 2, is characterized in that: flow-disturbing groove (2) incline direction that adjacent described little internal diameter section (1.2) inwall is arranged is contrary.
4. the crystallizer flow-disturbing submersed nozzle according to claim 1 or 2 or 3, it is characterized in that: described flow-disturbing groove (2) is provided with 4 ~ 6 along little internal diameter section (1.2) inwall, the groove width of every bar flow-disturbing groove (2) is 15 ~ 25mm, and bottom land and large diameter section (1.1) inwall of every bar flow-disturbing groove (2) are in circumferentially same.
5. the crystallizer flow-disturbing submersed nozzle according to claim 1 or 2 or 3, is characterized in that: the diameter of described little internal diameter section (1.2) is 70 ~ 90% of large diameter section (1.1) diameter.
6. the crystallizer flow-disturbing submersed nozzle according to claim 1 or 2 or 3, is characterized in that: described little internal diameter section (1.2) length is 50 ~ 100mm, adjacent little internal diameter section (1.2) be spaced apart 50 ~ 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520686391.7U CN204912747U (en) | 2015-09-06 | 2015-09-06 | Crystallizer vortex immersion nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520686391.7U CN204912747U (en) | 2015-09-06 | 2015-09-06 | Crystallizer vortex immersion nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN204912747U true CN204912747U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520686391.7U Expired - Fee Related CN204912747U (en) | 2015-09-06 | 2015-09-06 | Crystallizer vortex immersion nozzle |
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| Country | Link |
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| CN (1) | CN204912747U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051071A (en) * | 2017-04-10 | 2017-08-18 | 河北工业大学 | Device and method for removing fine particles by coupling steam phase change and turbulent flow agglomeration |
| CN107983943A (en) * | 2017-12-07 | 2018-05-04 | 安徽工业大学 | A kind of system and method for improving tundish Cleanliness of Molten Steel under unstable state state |
| CN114888270A (en) * | 2022-05-09 | 2022-08-12 | 湖南华菱涟源钢铁有限公司 | Slab continuous casting high-pulling-speed reverse inclined hole type wave suppression method |
| CN116237484A (en) * | 2023-05-11 | 2023-06-09 | 北京科技大学 | Judgment method for crystallizer immersed nozzle nodulation and molten steel bias flow |
-
2015
- 2015-09-06 CN CN201520686391.7U patent/CN204912747U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051071A (en) * | 2017-04-10 | 2017-08-18 | 河北工业大学 | Device and method for removing fine particles by coupling steam phase change and turbulent flow agglomeration |
| CN107051071B (en) * | 2017-04-10 | 2022-05-13 | 河北工业大学 | Device and method for removing fine particles by coupling steam phase change and turbulent flow agglomeration |
| CN107983943A (en) * | 2017-12-07 | 2018-05-04 | 安徽工业大学 | A kind of system and method for improving tundish Cleanliness of Molten Steel under unstable state state |
| CN107983943B (en) * | 2017-12-07 | 2019-07-05 | 安徽工业大学 | A kind of system and method improving tundish Cleanliness of Molten Steel under unstable state state |
| CN114888270A (en) * | 2022-05-09 | 2022-08-12 | 湖南华菱涟源钢铁有限公司 | Slab continuous casting high-pulling-speed reverse inclined hole type wave suppression method |
| CN116237484A (en) * | 2023-05-11 | 2023-06-09 | 北京科技大学 | Judgment method for crystallizer immersed nozzle nodulation and molten steel bias flow |
| CN116237484B (en) * | 2023-05-11 | 2023-07-28 | 北京科技大学 | Judgment method for crystallizer immersed nozzle nodulation and molten steel bias flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170801 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20200906 |
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| CF01 | Termination of patent right due to non-payment of annual fee |