CN201603852U - Submersed nozzle of continuous casting crystallizer - Google Patents
Submersed nozzle of continuous casting crystallizer Download PDFInfo
- Publication number
- CN201603852U CN201603852U CN2010200226804U CN201020022680U CN201603852U CN 201603852 U CN201603852 U CN 201603852U CN 2010200226804 U CN2010200226804 U CN 2010200226804U CN 201020022680 U CN201020022680 U CN 201020022680U CN 201603852 U CN201603852 U CN 201603852U
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- crystallizer
- continuous casting
- nozzle
- mouth
- submersed nozzle
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Abstract
The utility model relates to a nozzle of a crystallizer, in particular to a submersed nozzle of a continuous casting crystallizer, mainly aiming at solving the technical problems of larger liquid level fluctuation, uneven liquid residual distribution, slag entrapment of the crystallizer and the like in the continuous casting production process. The submersed nozzle of the continuous casting crystallizer is arranged inside the crystallizer and is provided with a middle hole which is circular; the two sides of the nozzle are respectively provided with side holes close to the bottom, the side holes of the nozzle are inclined downwards, and the inclined angle is 10-20 degrees; and the bottom of the submersed nozzle is provided with a concave bottom. As being provided with the optimized middle hole and the side holes arranged at the two sides of the nozzle, the submersed nozzle of the continuous casting crystallizer leads the liquid level molten steel of the crystallizer to have a certain flow speed and not to have the phenomenon of slag entrapment.
Description
Technical field:
The utility model relates to a kind of mold gap, particularly a kind of continuous cast mold submersed nozzle, and it has the mesopore and the both sides side opening of optimization, makes the mold liquid level molten steel have certain flow velocity and the phenomenon that can not roll up slag.
Background technology:
Continuous casting is constantly motlten metal to be injected in the crystallizer, pulls out strand after forming certain intensity solidified shell.Mobile in the crystallizer is the prerequisite that guarantees conticaster high efficiency and good slab quality preferably, flow field control unreasonable will cause in the crystallizer that Free Surface place flow velocity is excessive, meniscus fluctuation aggravation, to a series of problems such as crystallizer leptoprosopy impact strength are excessive.And reasonably submersed nozzle is the key factor that guarantees the crystallizer flow field.
For the crystallizer section is 210 * 900～1300mm
2Conticaster, first-class to change two machines into second-rate from a machine, in order to guarantee stove machine coupling, the operate as normal pulling rate changes 1.0～1.4m/min into from 2.0 original～2.4m/min.After pulling rate changes, use the former mouth of a river to exist the situation of bias current and obstruction easily to seem more outstanding.The left and right sides, flow field was asymmetric after molten steel entered crystallizer like this, the temperature field irrational distribution in the crystallizer, and its result will directly influence the surface and the internal soundness of final steel product, and crystallizer molten steel is rolled up slag easily, when serious the bleed-out accident can take place.
Therefore, along with the change of pulling rate and section, the crystallizer submersed nozzle that exploitation adapts to it is very important.
Chinese patent 200420097329.6 discloses " submersed nozzle that the generous slab of continuous pouring is used ", and this utility model provides a kind of immersion water gap for continuously casting, it is characterized in that mouth of a river bore profile is ellipse or pancake.The problem that low pulling rate causes nozzle blocking easily still can't be tackled in this mouth of a river.
The utility model content:
The utility model purpose is to propose a kind of continuous cast mold submersed nozzle, and it is bigger mainly to solve the liquid level fluctuation of crystallizer that occurs in the continuous casting production process, technical problems such as melt cinder skewness and crystallizer volume slag.The utility model thinking of the present utility model is by change mouth of a river bottom shape, middle hole area, and side opening angle and discharge area reduce the disturbance to liquid level, stable crystalline device flow field.
The utility model purpose is achieved in that a kind of continuous casting crystallizer for plate billet submersed nozzle, and the mouth of a river is arranged in the crystallizer, there is a mesopore at the mouth of a river, both sides, the mouth of a river have side opening, its feature near the bottom: mouth of a river mesopore is circular, and the submersed nozzle bottom is a concave bottom.
Mouth of a river side opening is downward-sloping, and the inclination angle is 10～20 °.
If middle hole area is excessive (as 30000mm
2), then conventional pulling rate as (pulling rate 1.4, crystallizer section 1100*210) situation under, molten steel can not be full of mesopore, occurs bias current easily, and it is asymmetric that then the left and right sides can take place in the crystallizer flow field, liquid level also can a side " extremely " (the liquid level flow velocity is low excessively) too, volume slag (the liquid level flow velocity is too big) appears in a side.The side opening area then according in hole area is corresponding reduces to some extent.The angle of side opening need be in certain scope, can not be too big, and can not be too little.The side opening angle is too little, and after then steel flowed out side opening, upwards the more close liquid level of part that refluxes moved in the molten steel high temperature in the heart, and liquid level is rolled up slag easily; The side opening angle is too big, and after then steel flowed out side opening, molten steel high temperature center moved down, and covering slag is difficult for fusing, consumes to reduce, and bleed-out takes place easily.Speed in bottom the concave bottom structure mouth of a river is less, the bounce-back and the backflow of bottom, mouth of a river existence stream thigh, and the tubulence energy loss is bigger, and the speed in the time of can reducing stream thigh delivery port side opening effectively reduces to flow burst washing away crystallizer leptoprosopy initial solidification shell.Therefore, do not having under the high pulling rate condition of electromagnetic braking, " braking " of matrix polycrystalline substance submersed nozzle jet effect will be more obvious.
The beneficial effects of the utility model are that by changing hole area, side opening area, bottom shape in the mouth of a river, the side opening angle can slow down liquid level fluctuation of crystallizer in the casting process, stablizes liquid level, reduce volume slag number of times and bleed-out probability, guarantees the explained hereafter direct motion.It is excessive to solve the crystallizer molten steel surface flow velocity that occurs in the production process, problems such as covering slag melt cinder skewness and crystallizer volume slag, and help solving the bias current problem.Guarantee product quality, saved production cost, satisfied the continuous casting production requirement.
Description of drawings:
Fig. 1 is the utility model structural representation vertical view
Fig. 2 is the A-A cutaway view of Fig. 1
Fig. 3 is the B-B cutaway view of Fig. 1
Fig. 4 the utility model mounting structure schematic diagram
Among the figure: 1-submersed nozzle body, 2-mouth of a river side opening, 3-concave bottom, 4-crystallizer, 5-mesopore.
The specific embodiment:
Below in conjunction with Fig. 1,2,3,4, specific embodiment of the utility model is elaborated.At be that (the crystallizer section is 210 * 900～1300mm to the slab of pulling rate scope under 0.8～1.6m/min pouring condition
2).
The utility model is to constitute like this, a kind of continuous casting crystallizer for plate billet submersed nozzle, submersed nozzle body 1 is arranged in the crystallizer 4, mouth of a river mesopore 5 is the circle of 80mm for diameter, there are two mouth of a river side openings 2 side, the mouth of a river near the bottom, side opening 2 apertures in the mouth of a river are downward and have inclined angle alpha, and α is 10～20 °, and single mouth of a river side opening 2 discharge areas are 5070mm
2, respectively by a 60 * 85mm
2Rectangle, four angle transition arcs radiuses are that R=6mm constitutes.Bottom, the mouth of a river is a concave bottom 3.
The utility model carries out the setting of related process parameter in conjunction with actual continuous casting manufacturing technique: mouth of a river insertion depth scope is (side opening top, the mouth of a river to molten steel identity distance from): 120～180mm; The blowing argon gas weight range is: 10～20Lmin
-1
Claims (3)
1. continuous casting crystallizer for plate billet submersed nozzle, the mouth of a river is arranged in the crystallizer, and there is a mesopore at the mouth of a river, and both sides, the mouth of a river have mouth of a river side opening near the bottom, it is characterized in that: mouth of a river mesopore is for circular, and the submersed nozzle bottom is a concave bottom.
2. a kind of continuous casting crystallizer for plate billet submersed nozzle according to claim 1 is characterized in that: described mouth of a river side opening is downward-sloping, and the inclination angle is 10～20 °.
3. a kind of continuous casting crystallizer for plate billet submersed nozzle according to claim 2 is characterized in that: mouth of a river side opening is the rectangle that has four arc chord angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200226804U CN201603852U (en) | 2010-01-14 | 2010-01-14 | Submersed nozzle of continuous casting crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200226804U CN201603852U (en) | 2010-01-14 | 2010-01-14 | Submersed nozzle of continuous casting crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201603852U true CN201603852U (en) | 2010-10-13 |
Family
ID=42948561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200226804U Expired - Fee Related CN201603852U (en) | 2010-01-14 | 2010-01-14 | Submersed nozzle of continuous casting crystallizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201603852U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319885A (en) * | 2011-09-28 | 2012-01-18 | 中冶南方工程技术有限公司 | Continuous casting method and device for double-nozzle cast ultra-thick plate blank |
| 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 |
| CN107552752A (en) * | 2017-10-27 | 2018-01-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Large section Properties of Heavy Rail Steel green shell steady quality control method |
-
2010
- 2010-01-14 CN CN2010200226804U patent/CN201603852U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319885A (en) * | 2011-09-28 | 2012-01-18 | 中冶南方工程技术有限公司 | Continuous casting method and device for double-nozzle cast ultra-thick plate blank |
| 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 |
| CN107552752A (en) * | 2017-10-27 | 2018-01-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Large section Properties of Heavy Rail Steel green shell steady quality control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101013 Termination date: 20140114 |