CN204276894U - A kind of waveform submersed nozzle - Google Patents
A kind of waveform submersed nozzle Download PDFInfo
- Publication number
- CN204276894U CN204276894U CN201420610450.8U CN201420610450U CN204276894U CN 204276894 U CN204276894 U CN 204276894U CN 201420610450 U CN201420610450 U CN 201420610450U CN 204276894 U CN204276894 U CN 204276894U
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- CN
- China
- Prior art keywords
- river
- mouth
- molten steel
- waveform
- inwall
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of waveform submersed nozzle in continuous casting installation for casting field, to solve the problem that the current equal diameter mouth of a river can not regulate molten steel Biased flow phenomenon in the mouth of a river.It comprises tubulose mouth of a river body, molten steel enters in crystallizer through the side tapping hole of tubulose mouth of a river body above bottom, above the tapping hole of body lower part side, the tubulose mouth of a river, there is one section of longitudinal section to be corrugated inwall, the crest of waveform inwall is concordant with tubulose mouth of a river body upper part inwall, crest is 5mm ~ 15mm to the vertical range of trough, the peak-to-peak distance of adjacent wave is 20mm ~ 50mm, and the height of waveform inner wall section is 100mm ~ 200mm.The utility model makes the path of originally directly lower along inwall molten steel stream change, and the speed of molten steel stream can be made to decline, alleviate the liquid fluctuating in crystallizer, molten steel stream also can be made in mouth of a river internal mix, and generation alleviates the effect even eliminating bias current.
Description
Technical field
The utility model relates to a kind of waveform submersed nozzle in continuous casting installation for casting field.
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.Submersed nozzle parameter is the steel stream flowing affected in crystallizer, slag interface degree of stability, strand conduct heat and the important factor in order of 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 metallurgy action preferably, just must carry out appropriate design to its planform, 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 of pipeline is invariable substantially, and in the pipeline of the mouth of a river vertically downward, the bottom end side tapping hole 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 molten steel Biased flow phenomenon in the mouth of a river.
Summary of the invention
The purpose of this utility model is to overcome prior art defect, provides a kind of waveform submersed nozzle.
The technical solution of the utility model is achieved in that a kind of waveform submersed nozzle, comprise tubulose mouth of a river body, molten steel enters in crystallizer through the side tapping hole of tubulose mouth of a river body above bottom, it is, above the tapping hole of body lower part side, the tubulose mouth of a river, have one section of longitudinal section to be corrugated inwall.
Preferably, the crest of waveform inwall is concordant with tubulose mouth of a river body upper part inwall, and crest is 5mm ~ 15mm to the vertical range of trough, and the peak-to-peak distance of adjacent wave is 20mm ~ 50mm.
Preferably, the height of waveform inner wall section is 100mm ~ 200mm.
The utility model makes the path of originally directly lower along inwall molten steel stream change, and the speed of molten steel stream can be made to decline, alleviate the liquid fluctuating in crystallizer, molten steel stream also can be made in mouth of a river internal mix, and generation alleviates the effect even eliminating bias current.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
In figure, 1-tubulose mouth of a river body; 2-waveform inwall; 3-side tapping hole; Bottom 4-.
Detailed description of the invention
Be further described below in conjunction with accompanying drawing:
As shown in Figure 1, a kind of waveform submersed nozzle, comprise tubulose mouth of a river body 1, molten steel enters in crystallizer through the side tapping hole 3 of tubulose mouth of a river body 1 above bottom 4, above tubulose mouth of a river body 1 lower side tapping hole 3, there is one section of longitudinal section to be corrugated inwall, experimentally data are preferred, the crest of waveform inwall 2 is concordant with tubulose mouth of a river body 1 upper inside wall, crest is 5mm ~ 15mm to the vertical range of trough and wave height, the peak-to-peak distance of adjacent wave and wavelength are 20mm ~ 50mm, and the height of waveform inner wall section is 100mm ~ 200mm.
The all walls of the utility model all adopt refractory material isostatic compaction, and occupation mode is identical with the conventional mouth of a river.
The utility model makes the path of originally directly lower along inwall molten steel stream change, and the speed of molten steel stream can be made to decline, alleviate the liquid fluctuating in crystallizer, molten steel stream also can be made in mouth of a river internal mix, and generation alleviates the effect even eliminating bias current.Experimental result shows, when other working conditions are identical, adopt the liquid level fluctuation of crystallizer at the mouth of a river of waveform inwall to reduce by more than 25% than the conventional mouth of a river, Biased flow phenomenon also obviously alleviates.Molten steel flow velocity in whole crystallizer and thermo parameters method relatively uniform, be conducive to the homoepitaxial of base shell, reduce the incidence of crackle, also help and reduce the liquid fluctuating of crystallizer, promote the floating of field trash, thus improve slab quality.
Claims (2)
1. a waveform submersed nozzle, comprise tubulose mouth of a river body, molten steel enters in crystallizer through the side tapping hole of tubulose mouth of a river body above bottom, it is characterized in that: above the tapping hole of body lower part side, the tubulose mouth of a river, have one section of longitudinal section to be corrugated inwall;
The crest of waveform inwall is concordant with tubulose mouth of a river body upper part inwall, and crest is 5mm-15mm to the vertical range of trough, and the peak-to-peak distance of adjacent wave is 20mm-50mm.
2. a kind of waveform submersed nozzle according to claim 1, is characterized in that: the height of waveform inner wall section is 100mm-200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610450.8U CN204276894U (en) | 2014-10-22 | 2014-10-22 | A kind of waveform submersed nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610450.8U CN204276894U (en) | 2014-10-22 | 2014-10-22 | A kind of waveform submersed nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204276894U true CN204276894U (en) | 2015-04-22 |
Family
ID=52860090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420610450.8U Expired - Fee Related CN204276894U (en) | 2014-10-22 | 2014-10-22 | A kind of waveform submersed nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204276894U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033237A (en) * | 2015-09-11 | 2015-11-11 | 首钢总公司 | Submersed nozzle for slab continuous casting |
-
2014
- 2014-10-22 CN CN201420610450.8U patent/CN204276894U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033237A (en) * | 2015-09-11 | 2015-11-11 | 首钢总公司 | Submersed nozzle for slab continuous casting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170717 Address after: 430083, Gate No. 2, Qingshan District, Hubei, Wuhan Patentee after: WUHAN IRON AND STEEL Co.,Ltd. Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: WUHAN IRON AND STEEL (GROUP) Corp. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20211022 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |