CN107419064B - Immersion jet dam ladle device and the method for improving RH molten steel internal circulating load - Google Patents
Immersion jet dam ladle device and the method for improving RH molten steel internal circulating load Download PDFInfo
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- CN107419064B CN107419064B CN201710670218.1A CN201710670218A CN107419064B CN 107419064 B CN107419064 B CN 107419064B CN 201710670218 A CN201710670218 A CN 201710670218A CN 107419064 B CN107419064 B CN 107419064B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 95
- 239000010959 steel Substances 0.000 title claims abstract description 95
- 238000007654 immersion Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000007670 refining Methods 0.000 claims abstract description 67
- 239000007921 spray Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims abstract description 6
- 230000000630 rising effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 21
- 238000007664 blowing Methods 0.000 description 12
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000003196 chaotropic effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
A kind of immersion jet dam ladle device and the method for improving RH molten steel internal circulating load, including RH refining furnace body, positioned at the ladle of RH refining furnace body bottom portion, ladle bottom is equipped with immersion jet dam, immersion jet dam side is equipped with arc groove, arc groove upper end top surface is equipped with first jet, second to the 6th nozzle is housed from top to bottom, immersion jet is provided with several deflector holes on dam in groove.Molten steel refines the effect of furnace body vacuum-pumping system by RH, starts refined molten steel after rising to specified altitude assignment；Nozzle combination individually sprays gas, and gas-powered molten steel, which rises to tedge and enters RH, refines furnace body refined molten steel；The molten steel of refining returns to immersion jet dam ladle by down-comer, continues to participate in refining treatment；After liquid steel refining, gas enters the collection rate of tedge, molten steel internal circulating load greatly improves.A kind of new method for improving circular flow is provided for the RH refining treatment of high-temperature molten steel.
Description
Technical field
The invention belongs to the application fields of molten steel RH refining furnace refining, fill more particularly to a kind of immersion jet dam ladle
The method for setting and improving molten steel internal circulating load, immersion jet dam ladle provide a kind of raising for the RH refining treatment of high-temperature molten steel
The new method of circular flow.
Background technique
In modern process for making process, also oneself is become the high-quality clean steel of production to RH application of vacuum equipment, especially super
Indispensable one of the key equipment of mild steel.Nineteen fifty-seven in the world First industrial production with RH vacuum deaerator plant by Germany
Rule steel (Ruhrstahl) company and conspicuous Laves (Heraeus) company Joint Designing, nineteen fifty-nine, in Thyssen company perseverance
Ni Xi steel mill is constructed and put into operation and is asserted RH method.
It is domestic and international metallurgist's focus of attention by increasing circular flow to improve RH production efficiency.Existing research table
Bright, increasing Argon amount can be improved circular flow, and there are a saturation value, when this value is exceeded, circular flow is reduced instead.Change
Dynamic dip pipe parameter is also to improve an effective way of circular flow, increases dipping bore, is impregnated using non-circular cross-section
It manages, using the structure of " three tedges add a down-comer " etc.；Apply rotating excitation field or traveling wave in tedge or down-comer
Magnetic field can also increase circular flow.However, existing production scene is based on considering equipment cost and maintenance etc., it is undesirable that in change
The structure of riser and down-comer is also not intended to increase electromagnetic equipment, therefore, under the premise of not changing existing RH apparatus structure
Improve the Important Problems that RH circular flow is production scene concern.
Xiao Ze is strong etc. to think that four aspects can be divided into liquid agitation acting by being blown into gas: 1. expansion work, i.e. gas exist
Nozzle nearby causes function made by volume expansion since temperature raises;2. buoyancy function, i.e. bubble in floating-upward process because of buoyancy and
Expansion work;3. power function, that is, the kinetic energy acting of gas streams when being blown;4. remnants static pressure when static pressure function, i.e. Gas injection
Power makes gas expansion work done.He also indicates that bubble made function in floating-upward process is the main portion for causing melting bath stirring with mixing
Point, gas kinetic energy is greatly consumed in nozzle.
Japan Steel Works propose RH-Injection method and RH-PB method in terms of RH is blown powder and gas.RH-
By spray gun by ladle top, direct oblique cutting enters in molten steel to be contacted Injection method with molten steel, spout RH tedge lower part into
Row blowing powder operation, as the spray gun of consumables, price is high, but service life is not grown, and the cost of refining treatment technique is caused
Increase；Spray gun is possible to touching convex closure in use, declining, and causes huge vibration, seriously affects steel treatment plan and production is adjusted
Degree；Spray gun stroke is certain, but liquid steel level height change is larger, so that spray gun immersion or too deep or too shallow, influences the steady of operation
It is qualitative, it is unfavorable for producing；Spray gun peels off or fracture enters molten steel and will seriously affect quality of molten steel；In case of have a power failure etc. accidents, not only
Spray gun may damage, and whole Baogang's water is also possible to scrap.RH-PB method is to be blown component in vacuum chamber side setting powder, to RH
It is blown in intrinsic molten steel, although overcoming the shortcomings that spray gun is inserted directly into molten steel, nozzle chaotropic face is close, is easy to cause spray
It splashes, and powder-spraying metallurgical low efficiency.
Zhu Miaoyong et al. is proposed in patent application " a kind of RH vacuum refining bottom blowing powder injection device 201210012782.1 "
1 or 2 bottom blowing powder injection component is arranged by radius distance away from ladle center 0~0.9 in ladle bottom, carries out bottom blowing powder injection operation,
It enhances mixing effect and improves steel quality.Lin Zhang state et al. is " a kind of to promote RH vacuum cycle decarbonization rate in patent application
Ladle bottom is proposed in control method 201210300209.0 " equipped with air brick, air brick position face RH tedge is in steel
Packet proj ected bottom center, improves the decarburization efficiency of mixing speed and molten steel.Geng Dianqiao et al. is investigated using method for numerical simulation
Fluid flowing and the influence of circular flow in RH device are blown again in the ladle bottom blowing position opposite side bottom of diameter 3m, the results showed that in steel
Under the conditions of packet bottom blowing, when one timing of Bottom blowing location and the ladle line of centres and dip pipe line of centres angle, with Bottom blowing location
To the increase of ladle centre distance, circular flow first increases and then decreases；When Bottom blowing location to one timing of ladle centre distance, circulation
Flow reduces with the increase of angle；Compared with existing RH Argon mode, when using side bottom blow again and ladle bottom blowing tolerance keep
In 200L/min, circular flow can be improved 25% or more；It is side-blown and when only taking ladle bottom blowing when closing tedge, and it is existing
RH Argon mode is compared, and circular flow can be improved 60%~100%.
Gas permeable member air blowing stirring molten steel is arranged in ladle bottom, and device is simple, but since ladle is deeper, bubble is in molten steel
Stroke is long, with recycle stream in floating-upward process, swings larger, until having a big chunk bubble can not when tedge entrance
Into tedge, and continue to float on the outside of tedge, goes out the ladle top of the slag, desulphurization is caused to stir, Yi Yinqi slag, and
A large amount of heat energy dissipations are carried, the present invention solves the problems, such as bubble floating path length by immersion jet dam, improves
Molten steel internal circulating load.
Summary of the invention
In order to solve many deficiencies of the prior art, the first purpose of the invention is to provide a kind of immersion jet dam steel
Bag apparatus, second purpose are to provide a kind of new side that RH refining furnace circular flow is improved using immersion jet dam ladle device
Method, apparatus and method of the present invention are particularly suitable for the improvement of existing steel plant's refinery practice.
The invention adopts the following technical scheme:
A kind of immersion jet dam ladle device, including RH refining furnace body, positioned at the ladle of RH refining furnace body bottom portion,
The tedge of RH refining furnace body and the bottom of down-comer are inserted into ladle respectively, and ladle bottom is equipped with immersion jet dam, leaching
Enter formula jet dam side equipped with arc groove, arc groove upper end top surface is equipped with first jet, fills from top to bottom in groove slot
There are second nozzle, third nozzle, the 4th nozzle, the 5th nozzle, the 6th nozzle, jet dam is provided with several deflector holes, jet dam
Immersion jet dam ladle device is formed with ladle.
Preferably, the vertical ladle section in immersion jet dam refines furnace body tedge and decline with RH
The plane that pipe central axes are constituted is in approximately the same plane.
Preferably, the height of the top surface away from ladle bottom on immersion jet dam is 1/3~2/3.
Preferably, three rows, three column deflector hole is set in the middle and lower part on immersion jet dam.
Preferably, the deflector hole aperture is identical, spaced set.
Preferably, the first jet, second nozzle, third nozzle, the 4th nozzle, the 5th nozzle, the 6th
Nozzle single-nozzle jet.
Preferably, the first jet, second nozzle, third nozzle, the 4th nozzle, the 5th nozzle, the 6th
Nozzle any combination constitutes multiple jet nozzles.
A method of RH molten steel internal circulating load being improved using immersion jet dam ladle, method particularly includes:
A. the molten steel in immersion jet dam ladle refines the effect of furnace body vacuum-pumping system by RH, rises to RH essence
Start refined molten steel after furnace ontology specified altitude assignment；
B. positioned at the nozzle sprays gas on the immersion jet dam of ladle bottom, gas-powered molten steel rises to tedge simultaneously
Furnace body refined molten steel is refined into RH；
C. the molten steel by refining returns to immersion jet dam ladle by down-comer, continues to participate in refining treatment, molten steel
Such shuttling movement is until RH refining furnace body refining finishes；
D. after liquid steel refining, gas enters the collection rate of tedge up to 75%-90%, and molten steel internal circulating load promotes 7%-15%.
Preferably, the first jet and third Nozzle combination positioned at the immersion jet dam of ladle bottom spray gas
Body, gas-powered molten steel, which rises to tedge and enters RH, refines furnace body, and the molten steel by refining is declined by RH refining furnace
Pipe returns to immersion jet dam ladle, continues to participate in refining treatment.
Preferably, positioned at the 4th nozzle on ladle bottom immersion jet dam, the 5th nozzle and the 6th combination spray
It emanates body, gas high efficiency drive molten steel, which rises to tedge and enters RH, refines furnace body, and the molten steel by refining passes through decline
Pipe returns to immersion jet dam ladle, continues to participate in refining treatment.
Immersion jet dam structure of the invention is simple, and remarkable result is: can by the nozzle of different location individually or
Combine jet makes most of bubble enter RH ontology to adjust jet source height, efficiently molten steel big flow is promoted to circulate,
To improve the refining efficiency of molten steel internal circulating load and RH refining furnace.The structure setting of immersion jet dam groove can comply with molten steel
Glide path and trend promote to gush on molten steel, strengthen the stirring in RH ladle；The deflector hole being arranged on immersion jet dam can
It effectively prevent the two sides on dam to form dead zone.A kind of new side for improving circular flow is provided for the RH refining treatment of high-temperature molten steel
Method.
Detailed description of the invention
Fig. 1 is the RH refined molten steel process sectional view of immersion jet dam ladle.
Fig. 2 is immersion jet dam perspective view.
In figure, 1-RH refines furnace body；2- down-comer；3- refining slag；4- ladle；5- molten steel；The side-blown pipe of 6-；7- rises
Pipe；8- immersion jet dam；9- deflector hole；10- first jet；11- second nozzle；12- third nozzle；The 4th nozzle of 13-；
The 5th nozzle of 14-；The 6th nozzle of 15-；16- groove.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing, to the present invention
Technical solution in embodiment is clearly and completely described, it is clear that described embodiment is that a part of the invention is implemented
Example, instead of all the embodiments.The following examples are intended to illustrate the invention, but cannot be used to limit protection model of the invention
It encloses.Condition in embodiment can be adjusted according to actual conditions are further, and the method for the embodiment of the present invention is only used for
Illustrate the present invention, rather than limiting the invention, simply the changing to preparation method of the present invention under concept thereof of the invention
Into belonging to the scope of protection of present invention.
The component of embodiments of the present invention, which are generally described and illustrated herein in the accompanying drawings can be come with a variety of different configurations
Arrangement and design.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third, the four, the five, the 6th " etc. are only used for area
Divide description, is not understood to indicate or imply relative importance.
Embodiment 1
See Fig. 1, ladle is arranged in RH refining 1 lower part of furnace body of the present embodiment, and RH refines the tedge 7 of furnace body 1 under
It drops pipe 2 to be inserted into ladle 4, wherein the top of tedge 7 is provided with side-blown pipe 6, and immersion jet dam 8 is located at 4 bottom of ladle, hangs down
Directly in 4 section of ladle, approximately the same plane is in the RH plane for refining furnace body tedge 7 and 2 central axes of down-comer composition.See
Fig. 2, immersion jet dam 8 are " data box body " structure, and height of the top surface away from ladle bottom is the 1/3 of 4 height of ladle, is being soaked
Enter and multiple deflector holes 9 are set on the interarea on formula jet dam 8, the present embodiment is arranged three rows three and arranges multiple deflector holes 9, multiple deflector holes
9 apertures are identical, and spaced set is located at the middle and lower part on immersion jet dam 8.The number of deflector hole 9 and arrangement mode are according to setting
Meter requires setting.The shoulder on immersion jet dam 8 i.e. side are an arc groove 16,16 upper end top surface of arc groove dress
There is the first jet 10 for jet, second nozzle 11, third nozzle 12, the 4th nozzle are housed from top to bottom in 16 slot of groove
13, the 5th nozzle 14, the 6th nozzle 15.
Ladle 4 and immersion jet dam 8 form immersion jet dam ladle, utilize immersion jet dam ladle refining molten steel
Process: molten steel in immersion jet dam ladle is acted on by RH refining furnace vacuum-pumping system, rises to RH refining furnace sheet
Start refined molten steel after body specified altitude assignment, the first jet and third Nozzle combination on ladle bottom immersion jet dam spray gas
Body, gas high efficiency drive molten steel, which rises to tedge and enters RH, refines furnace body, is returned by the molten steel of refining by down-comer
Immersion jet dam ladle is returned, refining treatment is continued to participate in, the such shuttling movement of molten steel is until the refining of RH refining furnace finishes.
After carrying out liquid steel refining using the present apparatus, gas enters the collection rate of tedge up to 90%, and molten steel internal circulating load is promoted
10%, mixing effect is good.
Embodiment 2
See Fig. 1, ladle 4 is arranged in RH refining 1 lower part of furnace body of the present embodiment, and RH refines 7 He of tedge of furnace body 1
The insertion of down-comer 2 is equipped in the ladle 4 of molten steel 5, and wherein the top of tedge 7 is provided with side-blown pipe 6,8, immersion jet dam
It is in perpendicular to 4 section of ladle with the RH plane for refining furnace body tedge and down-comer central axes composition in 4 bottom of ladle
Approximately the same plane.See Fig. 2, immersion jet dam 9 is " data box body " structure, and height of the top surface away from 4 bottom of ladle is ladle
Multiple deflector holes 9 are arranged in the 1/2 of height on the interarea on immersion jet dam 8, and the present embodiment deflector hole 9 is arranged three rows four and arranges,
Positioned at the lower part on immersion jet dam 8, multiple deflector hole apertures are identical, and the number and arrangement mode of deflector hole 9 are according to design
It is required that setting.The shoulder on immersion jet dam i.e. side are an arc grooves 16, and 16 upper end top surface of arc groove is equipped with
For the first jet 10 of jet, from top to bottom equipped with second nozzle 11, third nozzle 12, the 4th nozzle 13, the in groove slot
Five nozzles 14, the 6th nozzle 15.
Ladle 4 and immersion jet dam 8 form immersion jet dam ladle, utilize immersion jet dam ladle refining molten steel
Process: the molten steel in immersion jet dam ladle is acted on by RH vacuum-pumping system, after rising to RH ontology specified altitude assignment
Start refined molten steel, first jet, third nozzle and the 5th Nozzle combination on ladle bottom immersion jet dam spray gas, gas
Body high efficiency drive molten steel rises to tedge and enters RH ontology, and the molten steel by refining returns to immersion jet by down-comer
Dam ladle continues to participate in refining treatment, and the such shuttling movement of molten steel is until RH refining finishes.
After carrying out liquid steel refining using the present apparatus, gas enters the collection rate of tedge up to 84%, and molten steel internal circulating load is promoted
15%, mixing effect is good.
Embodiment 3
See Fig. 1, ladle is arranged in RH refining 1 lower part of furnace body of the present embodiment, and RH refines the tedge 7 of furnace body under
It drops pipe 2 to be inserted into ladle, wherein the top of tedge 7 is provided with side-blown pipe 6, and immersion jet dam 8 is located at 4 bottom of ladle, hangs down
Directly in 4 section of ladle, approximately the same plane is in the RH plane for refining furnace body tedge 7 and 2 central axes of down-comer composition.See
Fig. 2, immersion jet dam 8 are " data box body " structure, and height of the top surface away from ladle bottom is the 2/3 of ladle height, is being soaked
Enter and multiple deflector holes 9 are set on the interarea on formula jet dam, the present embodiment deflector hole 9 is arranged three rows three and arranges, and is located at immersion jet
The middle part on dam.Multiple 9 apertures of deflector hole are identical, and the number and arrangement mode of deflector hole 9 are set according to design requirement.Immersion
The shoulder on jet dam 8 i.e. side are an arc grooves 16, and 16 upper end top surface of arc groove is equipped with for the first of jet
Nozzle 10, from top to bottom equipped with second nozzle 11, third nozzle 12, the 4th nozzle 13, the spray of the 5th nozzle the 14, the 6th in groove slot
Mouth 15.
Ladle and immersion jet dam form immersion jet dam ladle, utilize immersion jet dam ladle refining molten steel
Process: the molten steel in immersion jet dam ladle is acted on by RH vacuum-pumping system, is opened after rising to RH ontology specified altitude assignment
Beginning refined molten steel, the 4th nozzle, the 5th nozzle and the 6th combined jet gas on ladle bottom immersion jet dam, gas are efficient
Driving molten steel, which rises to tedge and enters RH, refines furnace body, and the molten steel by refining returns to immersion jet by down-comer
Dam ladle continues to participate in refining treatment, and the such shuttling movement of molten steel is until RH refining finishes.
After carrying out liquid steel refining using the present apparatus, gas enters the collection rate of tedge up to 75%, and molten steel internal circulating load is promoted
7%, mixing effect is general.
Be above the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit it is claimed
The scope of the present invention, but it is merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Claims (8)
1. a kind of immersion jet dam ladle device, including RH refining furnace body, positioned at the ladle of RH refining furnace body bottom portion, RH
The bottom of the tedge and down-comer that refine furnace body is inserted into ladle respectively, which is characterized in that ladle bottom is equipped with immersion
Jet dam, the vertical ladle section in immersion jet dam are constituted with RH refining furnace body tedge and down-comer central axes
Plane is in approximately the same plane, and the height of the top surface away from ladle bottom on immersion jet dam is 1/3~2/3；Immersion spray
Air dam side is equipped with arc groove, and arc groove upper end top surface is equipped with first jet, is equipped with second from top to bottom in groove slot
Nozzle, third nozzle, the 4th nozzle, the 5th nozzle, the 6th nozzle, jet dam are provided with several deflector holes, jet dam and ladle
Form immersion jet dam ladle device.
2. immersion jet dam ladle device according to claim 1, which is characterized in that in the middle and lower part on immersion jet dam
Three row's deflector holes are set.
3. immersion jet according to claim 1 or claim 2 dam ladle device, which is characterized in that the deflector hole aperture phase
Together, spaced set.
4. immersion jet dam ladle device according to claim 1, which is characterized in that the first jet, the second spray
Mouth, third nozzle, the 4th nozzle, the 5th nozzle, the 6th nozzle single-nozzle jet.
5. immersion jet dam ladle device according to claim 1, which is characterized in that the first jet, the second spray
Mouth, third nozzle, the 4th nozzle, the 5th nozzle, the 6th nozzle any combination constitute multiple jet nozzles.
6. a kind of method for improving RH molten steel internal circulating load using immersion jet as described in claim 1 dam ladle device, special
Sign is, method particularly includes:
A. the molten steel in immersion jet dam ladle refines the effect of furnace body vacuum-pumping system by RH, rises to RH refining furnace
Start refined molten steel after ontology specified altitude assignment；
B. positioned at the nozzle sprays gas on the immersion jet dam of ladle bottom, gas-powered molten steel rises to tedge and enters
RH refines furnace body refined molten steel；
C. the molten steel by refining returns to immersion jet dam ladle by down-comer, continues to participate in refining treatment, molten steel is such
Shuttling movement is until RH refining furnace body refining finishes；
D. after liquid steel refining, gas enters the collection rate of tedge up to 75%-90%, and molten steel internal circulating load promotes 7%-15%.
7. the method according to claim 6 for improving RH molten steel internal circulating load using immersion jet dam ladle device, special
Sign is that the first jet and third Nozzle combination positioned at the immersion jet dam of ladle bottom spray gas, gas-powered steel
Liquid, which rises to tedge and enters RH, refines furnace body, and the molten steel by refining returns to immersion spray by RH refining furnace down-comer
Air dam ladle, continues to participate in refining treatment.
8. the method according to claim 6 for improving RH molten steel internal circulating load using immersion jet dam ladle device, special
Sign is that the 4th nozzle, the 5th nozzle and the 6th Nozzle combination positioned at the immersion jet dam of ladle bottom spray gas, gas
Body high efficiency drive molten steel, which rises to tedge and enters RH, refines furnace body, and the molten steel by refining is returned by down-comer to be immersed
Formula jet dam ladle, continues to participate in refining treatment.
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| CN201710670218.1A CN107419064B (en) | 2017-08-08 | 2017-08-08 | Immersion jet dam ladle device and the method for improving RH molten steel internal circulating load |
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| CN201710670218.1A CN107419064B (en) | 2017-08-08 | 2017-08-08 | Immersion jet dam ladle device and the method for improving RH molten steel internal circulating load |
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| CN109652615B (en) * | 2019-01-25 | 2020-07-24 | 钢铁研究总院 | Method for improving molten steel circulation flow in RH refining process |
| 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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| JP3124416B2 (en) * | 1993-06-28 | 2001-01-15 | 新日本製鐵株式会社 | Vacuum refining method of molten steel by gas injection |
| JPH08176647A (en) * | 1994-12-22 | 1996-07-09 | Sumitomo Metal Ind Ltd | Production of highly cleaned steel with less inclusion |
| JPH09170015A (en) * | 1995-12-20 | 1997-06-30 | Sumitomo Metal Ind Ltd | Refining furnace |
| CN2773093Y (en) * | 2005-02-07 | 2006-04-19 | 宝山钢铁股份有限公司 | Immersion cover of continuous iron-liquid pretreatment |
| CN101070560A (en) * | 2006-05-11 | 2007-11-14 | 鞍钢股份有限公司 | RII upstream pipe gas-supplying method and apparatus |
| CN101538641A (en) * | 2009-04-30 | 2009-09-23 | 东北大学 | RH bottom blowing argon vacuum circulating degasser |
| CN102560009B (en) * | 2012-01-16 | 2014-11-26 | 东北大学 | RH vacuum refining bottom blowing powder injection device |
| CN106947847B (en) * | 2017-03-25 | 2019-04-30 | 华北理工大学 | A kind of method of pressures cycle degassing equipment and its refined molten steel |
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