CN107419064A - Immersion jet dam ladle device and the method for improving RH molten steel internal circulating loads - Google Patents
Immersion jet dam ladle device and the method for improving RH molten steel internal circulating loads Download PDFInfo
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- CN107419064A CN107419064A CN201710670218.1A CN201710670218A CN107419064A CN 107419064 A CN107419064 A CN 107419064A CN 201710670218 A CN201710670218 A CN 201710670218A CN 107419064 A CN107419064 A CN 107419064A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 100
- 239000010959 steel Substances 0.000 title claims abstract description 100
- 238000007654 immersion Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000007670 refining Methods 0.000 claims abstract description 74
- 238000011282 treatment Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000005086 pumping Methods 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 21
- 238000007664 blowing Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000002156 mixing Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000008859 change Effects 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
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241001076960 Argon Species 0.000 description 1
- 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
- 235000013876 argon Nutrition 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003196 chaotropic effect Effects 0.000 description 1
- 238000010276 construction Methods 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
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 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
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005507 spraying Methods 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 loads, including RH refinings furnace body, the ladle positioned at RH refining furnace body bottom portions, ladle bottom is provided with immersion jet dam, immersion jet dam side is provided 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 pod apertures on dam in groove.Molten steel refines furnace body vacuum-pumping system by RH and acted on, and starts refined molten steel after rising to specified altitude assignment；Nozzle combination or independent gas injection, gas-powered molten steel rise to tedge and enter RH refining furnace body refined molten steels；The molten steel of refining returns to immersion jet dam ladle by down-comer, continues to participate in refining treatment；After liquid steel refining, collection rate, molten steel internal circulating load that gas enters tedge greatly improve.A kind of new method for improving circular flow is provided for the RH refining treatments of high-temperature molten steel.
Description
Technical field
The invention belongs to the application field of molten steel RH refining furnaces refining, is filled more particularly to a kind of immersion jet dam ladle
The method for putting and improving molten steel internal circulating load, immersion jet dam ladle provide a kind of raising for the RH refining treatments of high-temperature molten steel
The new method of circular flow.
Background technology
In modern process for making flow, also oneself produces high-quality clean steel to RH application of vacuum equipment through turning into, especially super
One of indispensable key equipment of mild steel.Nineteen fifty-seven in the world First industrial production with RH vacuum deaerator plants by Germany
Rule steel (Ruhrstahl) company and conspicuous Laves (Heraeus) company Joint Designing, it is nineteen fifty-nine, permanent in Thyssen company
Ni Xi steel mills are constructed and put into operation and are asserted RH methods.
It is domestic and international metallurgist's focus of attention by increasing circular flow to improve RH production efficiencys.Table is studied
Bright, increase Argon amount can improve circular flow, and a saturation value be present, and when this value is exceeded, circular flow is reduced on the contrary.Change
Dynamic dip pipe parameter is also to improve an effective way of circular flow, and increase is impregnated bore, impregnated using non-circular cross-section
Manage, 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, also it is not intended to increase electromagnetic equipment, therefore, on the premise of existing RH apparatus structures are not changed
Improve the Important Problems that RH circular flows are production scene concerns.
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 is nearby by temperature rise causes volumetric expansion institute work;2. buoyancy work(, i.e. bubble in floating-upward process because of buoyancy and
Expansion work;3. power work(, that is, the kinetic energy acting of gas streams when being blown;4. remnants static pressure when static pressure work(, i.e. Gas injection
Power makes gas expansion work done.He also indicates that bubble institute's work 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 methods and RH-PB methods in terms of RH is blown powder and gas.RH-
Injection methods are by spray gun by ladle top, and direct oblique cutting enters in molten steel to be contacted with molten steel, and spout enters in RH tedges bottom
Row injection powder operation, as the spray gun of running stores, price is high, but service life is not grown, and causes the cost of refining treatment technique
Increase；Spray gun is possible to touch convex closure in use, declining, and causes huge vibrations, has a strong impact on that steel treatment plan and production are adjusted
Degree；Spray gun stroke is certain, but liquid steel level height change is larger so that spray gun immersion is 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 have a strong impact on quality of molten steel；In case of have a power failure etc. accident, not only
Spray gun may damage, and whole Baogang's water is also possible to scrap.RH-PB methods are to set powder to be blown component in vacuum chamber sidepiece, 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 near, easily triggers spray
Splash, and powder-spraying metallurgical efficiency is low.
Zhu Miao is brave et al. " to be proposed in patent application in a kind of RH vacuum refinings bottom blowing powder injection device 201210012782.1 "
In ladle bottom away from ladle center 0~0.9 by radius distance, 1 or 2 bottom blowing powder injection component is set, carries out bottom blowing powder injection operation,
Enhance mixing effect and improve steel quality.Lin Zhang states et al. patent application " a kind of lifting RH vacuum cycle decarbonization rates
Ladle bottom is proposed in control method 201210300209.0 " and is provided with air brick, air brick position face RH tedges are in steel
Bag proj ected bottom center, improves mixing speed and the decarburization efficiency of molten steel.Geng Dianqiao et al. is investigated using method for numerical simulation
The influence of flow of fluid and circular flow in RH devices is blown again in diameter 3m ladle bottom blowing position offside bottom, the results showed that in steel
Under the conditions of bag bottom blowing, when Bottom blowing location and the ladle line of centres and the timing of dip pipe line of centres angle one, with Bottom blowing location
To the increase of ladle centre distance, circular flow first increases and then decreases；When Bottom blowing location to the timing of ladle centre distance one, circulation
Flow reduces with the increase of angle；Compared with existing RH Argons mode, when using side bottom blow again and ladle bottom blowing tolerance keep
In 200L/min, circular flow can improve more than 25%；It is side-blown and when only taking ladle bottom blowing when closing tedge, it is and existing
RH Argon modes are compared, and circular flow can improve 60%~100%.
Ladle bottom sets gas permeable member to blow and stirs molten steel, and device is simple, but because ladle is deeper, bubble is in molten steel
Stroke is grown, and with recycle stream in floating-upward process, swings larger, during to tedge entrance, has a big chunk bubble can not
Into tedge, and continue to float on the outside of tedge, go out the ladle top of the slag, cause desulphurization to stir, easily cause slag, and
A large amount of heat energy dissipations are carried, the present invention solve thes problems, such as bubble floating path length by immersion jet dam, improved
Molten steel internal circulating load.
The content of the invention
In order to solve many deficiencies of prior art, of the invention first purpose 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 flows are improved using immersion jet dam ladle device
Method, apparatus and method of the present invention are particularly suitable for use in the improvement of existing steel plant's refinery practice.
The present invention uses following technical scheme：
A kind of immersion jet dam ladle device, including RH refinings furnace body, the ladle positioned at RH refining furnace body bottom portions, RH essences
The tedge of furnace body and the bottom of down-comer are inserted in ladle respectively, and ladle bottom is provided with immersion jet dam, immersion
Jet dam side is provided with arc groove, and arc groove upper end top surface is equipped with first jet, from top to bottom equipped with the in groove groove
Two nozzles, the 3rd nozzle, the 4th nozzle, the 5th nozzle, the 6th nozzle, jet dam are provided with several pod apertures, jet dam and steel
Bag composition immersion jet dam ladle device.
Preferably, the vertical ladle section in the immersion jet dam, furnace body tedge and decline are refined with RH
The plane that pipe axis is formed is in approximately the same plane.
Preferably, the height of the top surface away from ladle bottom on the immersion jet dam is 1/3~2/3.
Preferably, the row pod apertures of three row three are set in the middle and lower part on immersion jet dam.
Preferably, described pod apertures aperture is identical, spaced set.
Preferably, described first jet, second nozzle, the 3rd nozzle, the 4th nozzle, the 5th nozzle, the 6th
Nozzle single-nozzle jet.
Preferably, described first jet, second nozzle, the 3rd nozzle, the 4th nozzle, the 5th nozzle, the 6th
Nozzle any combination forms multiple jets.
A kind of method that RH molten steel internal circulating loads are improved using immersion jet dam ladle, specific method are：
A. the molten steel in immersion jet dam ladle refines furnace body vacuum-pumping system by RH and acted on, and rises to RH refining furnaces
Start refined molten steel after body specified altitude assignment；
B. rise to tedge positioned at the nozzle sprays gas on the immersion jet dam of ladle bottom, gas-powered molten steel and enter
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 refinings finish；
D. after liquid steel refining, gas enters the collection rate of tedge up to 75%-90%, molten steel internal circulating load lifting 7%-15%.
Preferably, positioned at the first jet on the immersion jet dam of ladle bottom and the 3rd Nozzle combination injection gas
Body, gas-powered molten steel rise to tedge and enter RH refining furnace bodies, and the molten steel by refining is declined by RH refining furnaces
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
Emanate body, gas high efficiency drive molten steel rises to tedge and enters RH refining furnace bodies, and the molten steel by refining passes through decline
Pipe returns to immersion jet dam ladle, continues to participate in refining treatment.
The immersion jet dam of the present invention is simple in construction, and its remarkable result is：Can by the nozzle of diverse location individually or
Jet is combined, to adjust jet source height, most of bubble is entered RH bodies, efficiently promotes molten steel big flow to circulate,
So as to improve the refining efficiency of molten steel internal circulating load and RH refining furnaces.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 ladles；The pod apertures set on immersion jet dam can
Effectively prevent the both sides on dam from forming dead band.A kind of new side for improving circular flow is provided for the RH refining treatments of high-temperature molten steel
Method.
Brief description of the drawings
Fig. 1 is the RH refined molten steel process profiles of immersion jet dam ladle.
Fig. 2 is immersion jet dam stereogram.
In figure, 1-RH refining furnace bodies；2- down-comers；3- refining slags；4- ladles；5- molten steel；The side-blown pipes of 6-；7- rises
Pipe；8- immersion jets dam；9- pod apertures；10- first jets；11- second nozzles；The nozzles of 12- the 3rd；The nozzles of 13- the 4th；
The nozzles of 14- the 5th；The nozzles of 15- the 6th；16- grooves.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing, the present invention is implemented
Technical scheme in example is clearly and completely described, it is clear that and described embodiment is the part of the embodiment of the present invention,
Rather than whole embodiment.Following examples are used to illustrate the present invention, but can not be used for limiting the scope of the invention.It is real
Applying the condition in example can be adjusted according to actual conditions is further, and the method for the embodiment of the present invention is only used for explanation originally
Invention, rather than limitation of the present invention, the simple modifications of preparation method of the present invention are all belonged under the concept thereof of the present invention
In 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 configurations
Arrangement and design.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, or should
Invention product using when the orientation usually put or position relationship, be for only for ease of the description present invention and simplify description, without
It is instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.In addition, term " first ", " second ", " the three, the four, the five, the 6th " etc. are only used for area
Divide description, and it is not intended that instruction or hint relative importance.
Embodiment 1
See Fig. 1, RH refining furnace bodies 1 bottom of the present embodiment sets ladle, and RH refines the tedge 7 and down-comer of furnace body 1
In 2 insertion ladles 4, the top of wherein tedge 7 is provided with side-blown pipe 6, and immersion jet dam 8 is located at the bottom of ladle 4, perpendicular to
The section of ladle 4, the plane formed with RH refining furnace bodies tedge 7 and the axis of down-comer 2 are in approximately the same plane.See Fig. 2,
Immersion jet dam 8 is " data box body " structure, and height of its top surface away from ladle bottom is the 1/3 of the height of ladle 4, in immersion
Multiple pod apertures 9 are set on the interarea on jet dam 8, and the present embodiment sets three rows three to arrange multiple pod apertures 9, multiple holes of pod apertures 9
Footpath is identical, and spaced set is located at the middle and lower part on immersion jet dam 8.The number and arrangement mode of pod apertures 9 are according to design
It is required that setting.The shoulder on immersion jet dam 8 i.e. side are an arc grooves 16, and the upper end top surface of arc groove 16 is equipped with
For the first jet 10 of jet, in the groove of groove 16 from top to bottom equipped with second nozzle 11, the 3rd nozzle 12, the 4th nozzle 13,
5th nozzle 14, the 6th nozzle 15.
Ladle 4 forms immersion jet dam ladle with immersion jet dam 8, utilizes immersion jet dam ladle refining molten steel
Process：Molten steel in immersion jet dam ladle is acted on by RH refining furnaces vacuum-pumping system, rises to RH refining furnace sheets
Start refined molten steel, the first jet on ladle bottom immersion jet dam and the 3rd Nozzle combination injection gas after body specified altitude assignment
Body, gas high efficiency drive molten steel rise to tedge and enter RH refining furnace bodies, returned by the molten steel of refining by down-comer
Immersion jet dam ladle is returned, continues to participate in refining treatment, the such shuttling movement of molten steel is until the refining of RH refining furnaces 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 lifted
10%, mixing effect is good.
Embodiment 2
See Fig. 1, RH refining furnace bodies 1 bottom of the present embodiment sets ladle 4, the tedge 7 of RH refining furnace bodies 1 and decline
In ladle 4 of the insertion of pipe 2 equipped with molten steel 5, the top of wherein tedge 7 is provided with side-blown pipe 6, and immersion jet dam 8 is located at steel
4 bottoms are wrapped, perpendicular to the section of ladle 4, the plane that furnace body tedge and down-comer axis composition are refined with RH is in same
Individual plane.See Fig. 2, immersion jet dam 9 is " data box body " structure, and height of its top surface away from the bottom of ladle 4 is ladle height
1/2, multiple pod apertures 9 are set on the interarea on immersion jet dam 8, and the present embodiment pod apertures 9 set three rows four to arrange, and are located at
The bottom on immersion jet dam 8, multiple pod apertures apertures are identical, and the number and arrangement mode of pod apertures 9 are according to design requirement
Setting.The shoulder on immersion jet dam i.e. side are an arc grooves 16, and the upper end top surface of arc groove 16, which is equipped with, to be used for
The first jet 10 of jet, from top to bottom equipped with second nozzle 11, the 3rd nozzle 12, the spray of the 4th nozzle the 13, the 5th in groove groove
Mouth 14, the 6th nozzle 15.
Ladle 4 forms immersion jet dam ladle with immersion jet dam 8, utilizes immersion jet dam ladle refining molten steel
Process：Molten steel in immersion jet dam ladle is acted on by RH vacuum-pumping systems, after rising to RH body specified altitude assignments
Start refined molten steel, first jet, the 3rd nozzle and the 5th Nozzle combination gas injection on ladle bottom immersion jet dam, gas
Body high efficiency drive molten steel rises to tedge and enters RH bodies, and the molten steel by refining returns to immersion jet by down-comer
Dam ladle, refining treatment is continued to participate in, the such shuttling movement of molten steel is until RH refinings finish.
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 lifted
15%, mixing effect is good.
Embodiment 3
See Fig. 1, RH refining furnace bodies 1 bottom of the present embodiment sets ladle, and RH refines the tedge 7 and down-comer 2 of furnace body
Insert in ladle, the top of wherein tedge 7 is provided with side-blown pipe 6, and immersion jet dam 8 is located at the bottom of ladle 4, perpendicular to steel
4 sections are wrapped, the plane formed with RH refining furnace bodies tedge 7 and the axis of down-comer 2 is in approximately the same plane.See Fig. 2, soak
It is " data box body " structure to enter formula jet dam 8, and height of its top surface away from ladle bottom is the 2/3 of ladle height, is sprayed in immersion
Multiple pod apertures 9 are set on the interarea of air dam, and the present embodiment pod apertures 9 set three rows three to arrange, in immersion jet dam
Portion.Multiple apertures of pod apertures 9 are identical, and the number and arrangement mode of pod apertures 9 are set according to design requirement.Immersion jet dam
8 shoulder i.e. side are an arc grooves 16, and the upper end top surface of arc groove 16 is equipped with the first jet 10 for jet,
From top to bottom equipped with second nozzle 11, the 3rd nozzle 12, the 4th nozzle 13, the 5th nozzle 14, the 6th nozzle 15 in groove groove.
Ladle and immersion jet dam composition 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 vacuum-pumping systems, is opened after rising to RH body specified altitude assignments
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 rises to tedge and enters RH refining furnace bodies, and the molten steel by refining returns to immersion jet by down-comer
Dam ladle, refining treatment is continued to participate in, the such shuttling movement of molten steel is until RH refinings finish.
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 lifted
7%, mixing effect is general.
Above is the detailed description of the embodiments of the invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
Claims (10)
1. a kind of immersion jet dam ladle device, including RH refinings furnace body, the ladle positioned at RH refining furnace body bottom portions, RH
The bottom of the tedge and down-comer that refine furnace body is inserted in ladle respectively, it is characterised in that ladle bottom is provided with immersion
Jet dam, immersion jet dam side are provided with arc groove, and arc groove upper end top surface is equipped with first jet, and groove groove is interior certainly
Upper and lower equipped with second nozzle, the 3rd nozzle, the 4th nozzle, the 5th nozzle, the 6th nozzle, jet dam is provided with several water conservancy diversion
Hole, jet dam and ladle composition immersion jet dam ladle device.
2. immersion jet dam ladle device according to claim 1, it is characterised in that the immersion jet dam vertical steel
Section is wrapped, the plane that furnace body tedge and down-comer axis composition are refined with RH is in approximately the same plane.
3. immersion jet dam ladle device according to claim 1 or claim 2, it is characterised in that the immersion jet dam
Height of the top surface away from ladle bottom is 1/3~2/3.
4. immersion jet dam ladle device according to claim 1, it is characterised in that in the middle and lower part on immersion jet dam
Three row's pod apertures are set.
5. according to the immersion jet dam ladle device of claim 1 or 4, it is characterised in that described pod apertures aperture phase
Together, spaced set.
6. immersion jet dam ladle device according to claim 1, it is characterised in that described first jet, the second spray
Mouth, the 3rd nozzle, the 4th nozzle, the 5th nozzle, the 6th nozzle single-nozzle jet.
7. according to the immersion jet dam ladle device of claim 1 or 6, it is characterised in that described first jet, second
Nozzle, the 3rd nozzle, the 4th nozzle, the 5th nozzle, the 6th nozzle any combination form multiple jets.
A kind of 8. method that RH molten steel internal circulating loads are improved using immersion jet dam ladle, it is characterised in that specific method is：
A. the molten steel in immersion jet dam ladle refines furnace body vacuum-pumping system by RH and acted on, and rises to RH refining furnaces
Start refined molten steel after body specified altitude assignment；
B. rise to tedge positioned at the nozzle sprays gas on the immersion jet dam of ladle bottom, gas-powered molten steel and enter
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 refinings finish；
D. after liquid steel refining, gas enters the collection rate of tedge up to 75%-90%, molten steel internal circulating load lifting 7%-15%.
9. the method according to claim 8 that RH molten steel internal circulating loads are improved using immersion jet dam ladle, its feature are existed
In first jet and the 3rd Nozzle combination gas injection positioned at the immersion jet dam of ladle bottom, on gas-powered molten steel
Rise to tedge and enter RH refining furnace bodies, the molten steel by refining returns to immersion jet dam by RH refining furnaces down-comer
Ladle, continue to participate in refining treatment.
10. the method according to claim 8 that RH molten steel internal circulating loads are improved using immersion jet dam ladle, its feature are existed
In, the 4th nozzle, the 5th nozzle and the 6th combined jet gas positioned at ladle bottom immersion jet dam, gas high efficiency drive
Molten steel rises to tedge and enters RH refining furnace bodies, and the molten steel by refining returns to immersion jet dam steel by down-comer
Bag, 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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| CN107419064B CN107419064B (en) | 2019-06-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN102560009A (en) * | 2012-01-16 | 2012-07-11 | 东北大学 | RH vacuum refining bottom blowing powder injection device |
| CN106947847A (en) * | 2017-03-25 | 2017-07-14 | 华北理工大学 | A kind of method of pressures cycle degassing equipment and its refined molten steel |
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| CN102560009A (en) * | 2012-01-16 | 2012-07-11 | 东北大学 | RH vacuum refining bottom blowing powder injection device |
| CN106947847A (en) * | 2017-03-25 | 2017-07-14 | 华北理工大学 | A kind of method of pressures cycle degassing equipment and its refined molten steel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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