CN203393186U - Vacuum circulating degassing refining device for molten steel - Google Patents
Vacuum circulating degassing refining device for molten steel Download PDFInfo
- Publication number
- CN203393186U CN203393186U CN201320459321.9U CN201320459321U CN203393186U CN 203393186 U CN203393186 U CN 203393186U CN 201320459321 U CN201320459321 U CN 201320459321U CN 203393186 U CN203393186 U CN 203393186U
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- molten steel
- ladle
- upcast
- mouth
- spray argon
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Abstract
The utility model relates to a vacuum circulating degassing refining device for molten steel, and belongs to the technical field of ferrous metallurgy. The device provided by the utility model can be used for effectively increasing the upper limit value of a circular flow of the molten steel, effectively increasing the floating speed of inclusions and effectively eliminating dead zones in steel ladles. The vacuum circulating degassing refining device provided by the utility model comprises a steel ladle, a vacuum chamber, an ascending pipe and a descending pipe, wherein the bottom of the vacuum chamber is respectively communicated with one ends of the ascending pipe and the descending pipe, while the other ends of the ascending pipe and the descending pipe are located in the steel ladle. A plurality of side argon blowing nozzles are formed on the pipe wall of the ascending pipe, and the side argon blowing nozzles are uniformly distributed on the pipe wall of the ascending pipe in the peripheral direction. A first bottom argon blowing nozzle is arranged at the bottom, opposite to the lower end of the ascending pipe, of the steel ladle, a third argon blowing nozzle is formed at the bottom, opposite to the lower end of the descending pipe, of the steel ladle, and a second argon blowing nozzle is formed at the bottom, positioned between the first bottom argon blowing nozzle and the third argon blowing nozzle, of the steel ladle.
Description
Technical field
The utility model belongs to technical field of ferrous metallurgy, particularly relates to a kind of molten steel vacuum circulation degassing a refining unit.
Background technology
At present for obtaining ultra low-carbon steel and other special steel kind, the method that can take has RH method and REDA method, the i.e. method to the vacuum circulation degassing refining of molten steel, vacuum circulation degassing a refining unit for existing employing RH method, its principle of work is to be blown into argon gas by upcast, simultaneously under the effect vacuumizing, drive the molten steel in ladle to enter in vacuum chamber by upcast, then molten steel is got back in ladle by downtake by vacuum chamber again, complete the circulation of a molten steel, but existing vacuum circulation degassing a refining unit still has the following disadvantages:
1, due to the refining efficiency of molten steel, can be subject to the impact of circular flow, and the molten steel circular flow of existing vacuum circulation degassing a refining unit exists a higher limit, when the argon gas being blown into when upcast surpasses saturation value, circular flow no longer increases, and reduces on the contrary;
2, because the molten steel surface unprotect slag in vacuum chamber covers, the inclusion generating after deoxidation is mainly removed in ladle, and the ascent rate of deoxidation type inclusion has directly affected the length of deaeration time, but existing vacuum circulation degassing a refining unit cannot effectively increase the ascent rate of deoxidation type inclusion, cannot effectively improve the removal speed of deoxidation type inclusion;
3, existing vacuum circulation degassing a refining unit cannot effectively solve the problem in dead band in ladle.
Utility model content
The problem existing for prior art, the utility model provides a kind of can effectively increase molten steel circular flow higher limit, effectively increase the ascent rate of inclusion and effectively eliminate the molten steel vacuum circulation degassing a refining unit in dead band in ladle.
To achieve these goals, the utility model adopts following technical scheme: molten steel vacuum circulation degassing a refining unit, comprise ladle, vacuum chamber, upcast and downtake, the bottom of described vacuum chamber is connected with one end of upcast and downtake respectively, and the other end of upcast and downtake is all positioned at ladle; On the tube wall of described upcast, be provided with some side spray argon mouths, side spray argon mouth is uniformly distributed on the tube wall circumferential direction of upcast; Be characterized in being provided with first end spray argon mouth at the ladle bottom relative with upcast lower end, at the ladle bottom relative with downtake lower end, be provided with the 3rd spray argon mouth, the ladle bottom between the first end spray argon mouth and the 3rd spray argon mouth is provided with the second spray argon mouth.
Described ladle is round shape or oval cylinder.
The medullary ray of described ladle and the medullary ray of vacuum chamber coincide.
Described upcast and downtake are separately positioned on the both sides of vacuum chamber medullary ray.
Described first end spray argon mouth, the second end spray argon mouth and the 3rd end spray argon mouth are all at least one.
The beneficial effects of the utility model:
The utility model sprays argon operation by side spray argon mouth and first end spray argon mouth, the second end spray argon mouth and coordinating of the 3rd end spray argon mouth, increased the higher limit of molten steel circular flow, wherein by first end spray argon mouth, spray coordinating of argon mouth with the 3rd end, can be in the situation that not reducing molten steel circular flow, increase the ascent rate of inclusion, by the spray argon operation of second end spray argon mouth, the molten steel in dead band in ladle can be taken away to dead band, add in molten steel circulation simultaneously, finally improved the refining efficiency of molten steel and the ability of molten steel decarburization denitrogenation.
Accompanying drawing explanation
Fig. 1 is molten steel vacuum circulation degassing a refining unit structural representation of the present utility model;
Fig. 2 is A-A sectional view in Fig. 1;
Fig. 3 is Molten Steel Flow schematic diagram in the utility model;
In figure, 1-ladle, 2-vacuum chamber, 3-upcast, 4-downtake, 5-side spray argon mouth, 6-the first end spray argon mouth, 7-the second end spray argon mouth, 8-the three end spray argon mouth.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, 2, molten steel vacuum circulation degassing a refining unit, comprise ladle 1, vacuum chamber 2, upcast 3 and downtake 4, described upcast 3 and downtake 4 are all set to the cylinder barrel shaped structure that center has through hole, the bottom of described vacuum chamber 2 is connected with one end of upcast 3 and downtake 4 respectively, and the other end of upcast 3 and downtake 4 is all positioned at ladle 1; On the tube wall of described upcast 3, being provided with 5, six side spray argon mouths 5 of six side spray argon mouths circumferential direction on the tube wall of upcast 3 is uniformly distributed; In ladle 1 bottom relative with upcast 3 lower ends, be provided with first end spray argon mouth 6, in ladle 1 bottom relative with downtake 4 lower ends, be provided with the 3rd spray argon mouth 8, ladle 1 bottom between first end spray argon mouth 6 and the 3rd spray argon mouth 8 is provided with the second spray argon mouth 7.
Described ladle 1 is round shape.
The medullary ray of the medullary ray of described ladle 1 and vacuum chamber 2 coincides.
Described upcast 3 and downtake 4 are separately positioned on the both sides of vacuum chamber 2 medullary rays.
Described first end spray argon mouth 6, second end spray argon mouth 7 and the 3rd end spray argon mouth 8 are one.
Below in conjunction with accompanying drawing, a use procedure of the present utility model is described:
First, the molten steel that needs refining is poured in ladle 1, made molten steel not have the lower end port of upcast 3 and downtake 4, start the vaccum-pumping equipment of vacuum chamber 2, under pressure action, molten steel can enter in vacuum chamber 2 through upcast 3 and downtake 4 simultaneously, and molten steel now can't circulate; Open the side spray argon mouth 5 on upcast 3, argon gas is blown in molten steel from side spray argon mouth 5, now the molten steel in upcast 3 can move upward under the drive of argon gas bubbles, and enter in vacuum chamber 2, at this moment the molten steel having in ladle 1 adds in upcast 3, simultaneously the molten steel in downtake 4 can add in ladle 1, and molten steel in vacuum chamber 2 can enter in downtake 4, and now molten steel has just been realized and having been circulated.
Open first end spray argon mouth 6, argon gas is blown in molten steel from first end spray argon mouth 6, under the drive of argon gas bubbles, original molten steel circulation flow rate is improved greatly, thereby has increased the circular flow of molten steel; Open the 3rd end spray argon mouth 8, argon gas is blown in molten steel, argon gas bubbles floats simultaneously, in argon gas bubbles floating-upward process, argon gas bubbles can be subject to the impact that downtake 4 flows out molten steel, under the shock action of molten steel, argon gas bubbles originally can form the small bubbles of more dispersion, and then has increased the surface-area of argon gas bubbles; Due to the increase of argon gas bubbles surface-area and argon gas bubbles quantity, directly accelerated the stirring of ladle 1 interior molten steel and all mixed, increase the ascent rate of deoxidation type inclusion, and then realized the increase that deoxidation type inclusion is removed speed.
There is certain dead band in the interior meeting of ladle 1 between upcast 3 and downtake 4, during molten steel in dead band cannot normally enter and circulate, for in molten steel in dead band being entered circulate, open second end spray argon mouth 7, from the argon gas bubbles of second end spray argon mouth, 7 ejections, can constantly impact dead zone area so, force the molten steel in dead zone area to flow, thereby the molten steel in dead zone area is participated in circulating of ladle 1 interior molten steel, thus the refining efficiency of raising molten steel.
At molten steel, circulate in process, while opening the 3rd end spray argon mouth 8, can have a certain impact to the circular flow of molten steel, in order to guarantee that circular flow is constant, can increase the inlet of the argon gas of first end spray argon mouth 6, dynamically maintain circular flow steadily, make molten steel in ladle 1 all the time in high circular flow state current downflow.
Under the common spray argon effect of side spray argon mouth 5, first end spray argon mouth 6, second end spray argon mouth 7 and the 3rd end spray argon mouth 8, in the utility model, Molten Steel Flow schematic diagram as shown in Figure 3.
Claims (5)
1. molten steel vacuum circulation degassing a refining unit, comprises ladle, vacuum chamber, upcast and downtake, and the bottom of described vacuum chamber is connected with one end of upcast and downtake respectively, and the other end of upcast and downtake is all positioned at ladle; On the tube wall of described upcast, be provided with some side spray argon mouths, side spray argon mouth is uniformly distributed on the tube wall circumferential direction of upcast; It is characterized in that being provided with first end spray argon mouth at the ladle bottom relative with upcast lower end, at the ladle bottom relative with downtake lower end, be provided with the 3rd spray argon mouth, the ladle bottom between the first end spray argon mouth and the 3rd spray argon mouth is provided with the second spray argon mouth.
2. molten steel vacuum circulation degassing a refining unit according to claim 1, is characterized in that: described ladle is round shape or oval cylinder.
3. molten steel vacuum circulation degassing a refining unit according to claim 1, is characterized in that: the medullary ray of described ladle and the medullary ray of vacuum chamber coincide.
4. molten steel vacuum circulation degassing a refining unit according to claim 1, is characterized in that: described upcast and downtake are separately positioned on the both sides of vacuum chamber medullary ray.
5. molten steel vacuum circulation degassing a refining unit according to claim 1, is characterized in that: described first end spray argon mouth, the second end spray argon mouth and the 3rd end spray argon mouth are all at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320459321.9U CN203393186U (en) | 2013-07-30 | 2013-07-30 | Vacuum circulating degassing refining device for molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320459321.9U CN203393186U (en) | 2013-07-30 | 2013-07-30 | Vacuum circulating degassing refining device for molten steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203393186U true CN203393186U (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320459321.9U Expired - Fee Related CN203393186U (en) | 2013-07-30 | 2013-07-30 | Vacuum circulating degassing refining device for molten steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203393186U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397145A (en) * | 2013-07-30 | 2013-11-20 | 东北大学 | Vacuum cyclic degassing refining device for molten steel |
-
2013
- 2013-07-30 CN CN201320459321.9U patent/CN203393186U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397145A (en) * | 2013-07-30 | 2013-11-20 | 东北大学 | Vacuum cyclic degassing refining device for molten steel |
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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: 20140115 Termination date: 20150730 |
|
| EXPY | Termination of patent right or utility model |