CN103397145A - Vacuum cyclic degassing refining device for molten steel - Google Patents
Vacuum cyclic degassing refining device for molten steel Download PDFInfo
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- CN103397145A CN103397145A CN2013103249350A CN201310324935A CN103397145A CN 103397145 A CN103397145 A CN 103397145A CN 2013103249350 A CN2013103249350 A CN 2013103249350A CN 201310324935 A CN201310324935 A CN 201310324935A CN 103397145 A CN103397145 A CN 103397145A
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Abstract
The invention discloses a vacuum cyclic degassing refining device for molten steel, which belongs to the technical field of ferrous metallurgy. According to the invention, the upper limit value of the cyclic flow rate of the molten steel and the floating speed of inclusions can be effectively enhanced, and dead zones in a steel ladle can be effectively eliminated. The vacuum cyclic degassing refining device comprises the steel ladle, a vacuum chamber, an ascending tube and a descending tube, wherein the bottom of the vacuum chamber are communicated with one end of the ascending tube and one end of the descending tube respectively, and the other end of the ascending tube and the other end of the descending tube are located in the steel ladle; a plurality of argon side-spraying nozzles are formed in the wall of the ascending tube, and are uniformly distributed in the circumference direction of the wall of the ascending tube; a first argon bottom-spraying nozzle is formed in the bottom of the steel ladle and opposite to the lower end of the ascending tube, a third argon spraying nozzle is formed in the bottom of the steel ladle and opposite to the lower end of the descending tube, and a second argon spraying nozzle is formed in the bottom of the steel ladle and between the first argon bottom-spraying nozzle and the third argon spraying nozzle.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, particularly relate 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, namely to the method for 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 that vacuumizes, the molten steel that drives in ladle enters 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 has the following disadvantages still:
1, due to the refining efficiency of molten steel, can be subject to the impact of circular flow, and there is a higher limit in the molten steel circular flow of existing vacuum circulation degassing a refining unit, when the argon gas that is blown into when upcast surpassed saturation value, circular flow no longer increased, and reduces on the contrary;
2, because the surface of the molten steel in vacuum chamber unprotect slag covers, the inclusion that generates 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 can't effectively increase the ascent rate of deoxidation type inclusion, namely can't effectively improve the removal speed of deoxidation type inclusion;
3, existing vacuum circulation degassing a refining unit can't effectively solve the problem in dead band in ladle.
Summary of the invention
For the problem that prior art exists, the invention provides a kind of ascent rate and effective molten steel vacuum circulation degassing a refining unit of eliminating dead band in ladle that can effectively increase molten steel circular flow higher limit, effectively increase inclusion.
To achieve these goals, the present invention adopts following technical scheme: a kind of molten steel vacuum circulation degassing a refining unit, comprise ladle, vacuum chamber, upcast and downtake, the bottom of described vacuum chamber is connected with an end of upcast and downtake respectively, and the other end of upcast and downtake all is 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 the upcast lower end, at the ladle bottom relative with the 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 all are at least one.
Beneficial effect of the present invention:
The present invention is sprayed the 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, with the 3rd end, spray coordinating of argon mouth, can be in the situation that do not reduce the molten steel circular flow, increase the ascent rate of inclusion, spray argon operation by second end spray argon mouth, the molten steel in dead band in ladle can be taken away to dead band, add simultaneously in the molten steel circulation, finally improved the refining efficiency of molten steel and the ability of molten steel decarburization denitrogenation.
The accompanying drawing explanation
Fig. 1 is a kind of molten steel vacuum circulation degassing a refining unit structural representation of the present invention;
Fig. 2 is A in Fig. 1-A sectional view;
Fig. 3 is Molten Steel Flow schematic diagram in the present invention;
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
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, 2, a kind of 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 all are set to the cylinder barrel shaped structure that center has through hole, the bottom of described vacuum chamber 2 is connected with an end of upcast 3 and downtake 4 respectively, and the other end of upcast 3 and downtake 4 all is positioned at ladle 1; Be uniformly distributed 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; 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 invention is described:
At 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 simultaneously through upcast 3 and downtake 4, and the molten steel of this moment can't circulate; Open the side spray argon mouth 5 on upcast 3, argon gas is from being blown in molten steel side spray argon mouth 5, this moment, upcast 3 interior molten steel can move upward under the drive of argon gas bubbles, and enter in vacuum chamber 2, at this moment the molten steel that has in ladle 1 adds in upcast 3, molten steel in downtake 4 can add in ladle 1 simultaneously, and the molten steel in vacuum chamber 2 can enter in downtake 4, and this moment, molten steel was just realized circulating.
Open first end spray argon mouth 6, argon gas, from first end spray argon mouth 6, being blown in molten steel, under the drive of argon gas bubbles, greatly improves original molten steel circulation flow rate, 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 the 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 can't 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, thereby improve the refining efficiency of molten steel.
At molten steel, circulate in process, while opening the 3rd end spray argon mouth 8, can the circular flow of molten steel be had a certain impact, 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 remain the steady of circular flow, make the interior molten steel of 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 present invention, the Molten Steel Flow schematic diagram as shown in Figure 3.
Claims (5)
1. a molten steel vacuum circulation degassing a refining unit, comprise ladle, vacuum chamber, upcast and downtake, and the bottom of described vacuum chamber is connected with an end of upcast and downtake respectively, and the other end of upcast and downtake all is 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 the upcast lower end, at the ladle bottom relative with the 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. a kind of molten steel vacuum circulation degassing a refining unit according to claim 1, it is characterized in that: described ladle is round shape or oval cylinder.
3. a kind of molten steel vacuum circulation degassing a refining unit according to claim 1, it is characterized in that: the medullary ray of described ladle and the medullary ray of vacuum chamber coincide.
4. a kind of molten steel vacuum circulation degassing a refining unit according to claim 1, it is characterized in that: described upcast and downtake are separately positioned on the both sides of vacuum chamber medullary ray.
5. a kind of 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 all are at least one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103249350A CN103397145A (en) | 2013-07-30 | 2013-07-30 | Vacuum cyclic degassing refining device for molten steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103249350A CN103397145A (en) | 2013-07-30 | 2013-07-30 | Vacuum cyclic degassing refining device for molten steel |
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| CN103397145A true CN103397145A (en) | 2013-11-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106906335A (en) * | 2015-10-30 | 2017-06-30 | 株式会社Posco | Refining equipment and method |
| CN109652615A (en) * | 2019-01-25 | 2019-04-19 | 钢铁研究总院 | A method of improving RH refining process molten steel circular flow |
| CN115232922A (en) * | 2022-07-13 | 2022-10-25 | 湖南华菱涟源钢铁有限公司 | RH refining furnace and method for shortening RH treatment period |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04131316A (en) * | 1990-09-20 | 1992-05-06 | Kawasaki Steel Corp | Method and device for vacuum degassing of extra-low-carbon steel |
| CN101538641A (en) * | 2009-04-30 | 2009-09-23 | 东北大学 | RH bottom blowing argon vacuum circulating degasser |
| CN203393186U (en) * | 2013-07-30 | 2014-01-15 | 东北大学 | Vacuum circulating degassing refining device for molten steel |
-
2013
- 2013-07-30 CN CN2013103249350A patent/CN103397145A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04131316A (en) * | 1990-09-20 | 1992-05-06 | Kawasaki Steel Corp | Method and device for vacuum degassing of extra-low-carbon steel |
| CN101538641A (en) * | 2009-04-30 | 2009-09-23 | 东北大学 | RH bottom blowing argon vacuum circulating degasser |
| CN203393186U (en) * | 2013-07-30 | 2014-01-15 | 东北大学 | Vacuum circulating degassing refining device for molten steel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106906335A (en) * | 2015-10-30 | 2017-06-30 | 株式会社Posco | Refining equipment and method |
| CN106906335B (en) * | 2015-10-30 | 2019-06-07 | 株式会社Posco | Refining equipment and method |
| CN109652615A (en) * | 2019-01-25 | 2019-04-19 | 钢铁研究总院 | A method of improving RH refining process molten steel circular flow |
| CN115232922A (en) * | 2022-07-13 | 2022-10-25 | 湖南华菱涟源钢铁有限公司 | RH refining furnace and method for shortening RH treatment period |
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Application publication date: 20131120 |