CN107983944A - The method and device of molten steel casting surplus is reduced in a kind of casting process - Google Patents
The method and device of molten steel casting surplus is reduced in a kind of casting process Download PDFInfo
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- CN107983944A CN107983944A CN201810038562.3A CN201810038562A CN107983944A CN 107983944 A CN107983944 A CN 107983944A CN 201810038562 A CN201810038562 A CN 201810038562A CN 107983944 A CN107983944 A CN 107983944A
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- molten steel
- cover
- vacuum impregnation
- impregnation cover
- vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/001—Retaining slag during pouring molten metal
- B22D43/004—Retaining slag during pouring molten metal by using filtering means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/119—Refining the metal by filtering
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
Abstract
The invention belongs to technical field of ferrous metallurgy, discloses the method and device that a kind of casting process reduces molten steel casting surplus.Casting process reduces the device of molten steel casting surplus, including impregnating cover, and impregnating cover is the vacuum impregnation cover of frusto-conical.The height of vacuum impregnation cover is 400~700mm, the circle of top cross-sectional, a diameter of 150~500mm；The circle of bottom cross section, a diameter of 200~600mm.In the cast latter stage of ladle or tundish, the vacuum impregnation cover of a frusto-conical is placed into ladle nozzle or the molten steel of the surface of middle water containing opening.Apparatus and method of the present invention is it is possible to prevente effectively from the phenomenon of vortex slag pollution molten steel.Vacuum impregnation cover can play pushing off the slag effect will not substantially stop the flowing of molten steel again, be conducive to continuous casting and stablize and efficiently run.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, in particular it relates to which a kind of casting process reduces molten steel casting
The method and device of surplus.
Background technology
The remaining ladle that includes of casting in casting process is cast more than the casting of remaining and tundish.In the cast latter stage of ladle or tundish, with
The decline of molten steel liquid level, to prevent to be vortexed slag phenomenon, when ladle or tundish also do not pour most steel, is shut off
Tap the mouth of a river, by have casting more than steel ladle or tundish handling walk.Liquid level 50mm~75mm can be left in general ladle
Casting more than steel, steel more than the casting of liquid level 200mm~300mm can be left in tundish.
The later stage cast with the decline of liquid steel level, conflux vortex can be produced in slag interface, and grows in intensity, will lead
The emulsification of slag steel is caused, eddy flow slag phenomenon occurs.Conflux vortex is that liquid is first vertical to be declined, and drops to one during container drainage
When determining height, liquid just starts to collect to outflow port center line, and forms recessed whirlpool on slag blanket surface, and liquid level at this moment is commonly referred to as
For critical rotation height.Eddy flow slag phenomenon can pollute molten steel, cause the decline of steel product quality.
In continuous casting working procedure, have by throwing skimming ball into ladle to prevent the report of big bag vortex slag, but in order to
The effect for separating clinker is played, the diameter of skimming ball need to be more than 2 times or so of ladle nozzle diameter, due to the size of skimming ball
Larger, when molten steel liquid level is relatively low, skimming ball can fall above the mouth of a river, the spherical structure of skimming ball and the circular tube shaped at the mouth of a river
Structure matches, and skimming ball can block a part of mouth of a river, causes poring rate slack-off, causes the liquid level fluctuation of molten steel in tundish
And the rhythm of production of continuous casting can be influenced.
The content of the invention
To solve problem above, the present invention provides the method and device that a kind of casting process reduces molten steel casting surplus.
A kind of casting process reduces the device of molten steel casting surplus, including impregnating cover.
The impregnating cover is the vacuum impregnation cover of frusto-conical.The height of vacuum impregnation cover is 400~700mm.
The circle of vacuum impregnation cover top cross-sectional, a diameter of 150~500mm；The circle of vacuum impregnation cover bottom cross section
Shape, a diameter of 200~600mm.
The structure of the vacuum impregnation cover of the frusto-conical is inside and outside two layers.The endothecium structure of vacuum impregnation cover is bottom
Opening, the hollow frusto-conical shape refractory material of top seal shape, material is corundum, hollow frusto-conical shape refractory material
Bottom is zigzag annulus, and the height of sawtooth is 10~20mm；The layer structure of vacuum impregnation cover seals for bottom and top
The hollow frusto-conical shape device of shape, material is sheet metal, and the pipeline and valve vacuumized is equipped with the bottom of layer structure.
Before vacuum impregnation cover use, vacuum impregnation cover is vacuumized using vaccum-pumping equipment, and close valve.
The method that a kind of casting process of the present invention reduces molten steel casting surplus：In the cast latter stage of ladle or tundish, Xiang Gang
The vacuum impregnation cover of a frusto-conical is placed in the molten steel of the surface of water-coating port or middle water containing opening, vacuum impregnation cover
Highly it is 400~700mm.Before vacuum impregnation cover is put into molten steel, the inside of vacuum impregnation cover is vacuum state, by Vaccum Permeating
After stain cover is put into molten steel, molten steel melts away the bottom of vacuum impregnation cover, and molten steel is influenced to be pressed into Vaccum Permeating by atmospheric pressure
In stain cover, the molten steel liquid level rise in vacuum impregnation cover.Since vacuum impregnation cover is in the top at the mouth of a river so that ladle or in
Between cast latter stage for wrapping, still there is above the mouth of a river molten steel liquid level of 400~700mm height, realize local high liquid level cast,
Still will not eddy generation slag phenomenon in cast latter stage.
Preferably, in the cast latter stage of ladle or tundish, hung with compact electromagnetic and vacuum impregnation cover is hung in into ladle nozzle
Or in the molten steel above middle water containing opening, vacuum impregnation cover can arrange the top slag on liquid steel level, and vacuum impregnation covers on down
During drop, the layer structure of sheet metal matter is melted by molten steel, and under the action of atmospheric pressure, molten steel is from the bottom of vacuum impregnation cover
Portion is pressed into vacuum impregnation cover, and under the action of atmospheric pressure, molten steel is pressed into vacuum impregnation cover, due to vacuum impregnation cover position
In the surface at the mouth of a river so that in cast latter stage, the molten steel liquid level above the mouth of a river highly remains as the height of vacuum impregnation cover, i.e.,
For 400~700mm.Under so high liquid level, substantially will not eddy generation slag phenomenon, even if there is clinker to flow into Vaccum Permeating
In stain cover, since molten steel liquid level is higher in impregnating cover, rising phenomenon, meeting can also occur for the clinker flowed into from vacuum impregnation cover bottom
Float up to the top of impregnating cover.
Preferably, in the cast latter stage of ladle or tundish, when molten steel liquid level is less than 200~400mm, to ladle nozzle
Or the vacuum impregnation cover of a frusto-conical is placed in the surface of middle water containing opening.
Preferably, in the cast latter stage of ladle or tundish, when molten steel liquid level is less than 200~400mm, compact electromagnetic is used
Hang the top that vacuum impregnation cover is hung in ladle nozzle or middle water containing opening, and with the speed of 5~15mm/s by vacuum impregnation cover
Fall into molten steel.
Preferably, when vacuum impregnation cover being applied to the cast of tundish, when the liquid level in tundish is less than 30~50mm,
Tundish stops cast.
After vacuum impregnation cover drops to ladle or tundish bottom, the zigzag of hollow frusto-conical shape refractory material bottom
Annulus plays the role of supporting vacuum impregnation cover, while molten steel is flowed into vacuum impregnation cover from jagged gap.By Vaccum Permeating
When stain cover is applied to the cast of ladle, when liquid level is less than the height of sawtooth in ladle, which stops cast.By Vaccum Permeating
When stain cover is applied to the cast of tundish, when the liquid level in tundish is less than 30~50mm, tundish stops cast.
Advantages of the present invention
1st, pour into a mould latter stage, the molten steel liquid level in vacuum impregnation cover above the mouth of a river is very high, higher than the molten steel liquid of critical rotation
Position height, will not form conflux vortex, the clinker around vacuum impregnation cover will not be involved in molten steel, be avoided that vortex slag is dirty
Contaminate the phenomenon of molten steel.
2nd, vacuum impregnation cover can arrange the clinker above the mouth of a river, can play the pushing off the slag effect as skimming ball, and very
The bottom shape of empty impregnating cover is zigzag annulus, limited to the barrier effect of molten steel, and molten steel can pass through saw with faster speed
The gap of dentation flows into the mouth of a river, and vacuum impregnation cover can play pushing off the slag effect will not substantially stop the flowing of molten steel again, be conducive to
Continuous casting stablizes and efficient operation.
3rd, due to the presence of vacuum impregnation cover, solves vortex slag this problem, under the relatively low liquid level of molten steel
Will not eddy generation slag phenomenon, it is possible to achieve the low liquid level cast of molten steel, can reduce molten steel casting surplus more than 60%, that is, increase
Add the rate of steel products produced to steel ingots, and save resource.
Brief description of the drawings：
Profile during Fig. 1, vacuum impregnation cover use.
The endothecium structure figure of Fig. 2, vacuum impregnation cover.
The layer structure figure of Fig. 3, vacuum impregnation cover.
Wherein：1：The outer layer of vacuum impregnation cover；2：The internal layer of vacuum impregnation cover；3：Clinker；4：Molten steel；5：Flow into Vaccum Permeating
Clinker in stain cover；；6：The mouth of a river；11：The top of vacuum impregnation cover outer layer device；12：The bottom of vacuum impregnation cover outer layer device；
13：Vacuum lead；14：Valve；21：The top of vacuum impregnation cover inner-layer device；22：Zigzag annulus.
Embodiment：
In the cast latter stage of ladle or tundish, when molten steel liquid level is less than 200~400mm, to ladle nozzle or centre
The vacuum impregnation cover of a frusto-conical is placed in the surface of water-coating port, and the height of vacuum impregnation cover is 400~700mm, bottom
A diameter of 200~the 600mm in portion, top diameter are 150~500mm, in the structure of the vacuum impregnation cover of the frusto-conical is divided into
Outer two layers, the internal layer 2 of vacuum impregnation cover is bottom opening, the hollow frusto-conical shape refractory material of top seal shape, and material is
Corundum, the bottom of hollow frusto-conical shape refractory material are zigzag annulus 22, and the height of sawtooth is 10~20mm, Vaccum Permeating
The outer layer of stain cover is the hollow frusto-conical shape device of the equal seal shape in bottom and top, and material is sheet metal, in layer structure
Bottom 12 is equipped with the pipeline 13 and valve 14 vacuumized, and valve is closed after vacuum impregnation cover is vacuumized using exterior vacuum extractor
Door 14, vacuum impregnation cover is spare.
In the cast latter stage of ladle or tundish, when molten steel liquid level is less than 200~400mm, being hung with compact electromagnetic will be true
Empty impregnating cover hangs in the top of ladle nozzle or middle water containing opening 6, and vacuum impregnation cover is fallen into steel with the speed of 5~15mm/s
In liquid, vacuum impregnation is covered on during decline, and the sheet metal 12 of bottom is melted by molten steel 4 in layer structure 1, in atmospheric pressure
Under effect, molten steel 4 is pressed into vacuum impregnation cover by the bottom of vacuum impregnation cover, meanwhile, in layer structure 1 with steel contacts
The steel plate at position is dissolved by molten steel, after vacuum impregnation cover drops to ladle or tundish bottom, the zigzag circle in endothecium structure 2
Ring 22 plays the role of supporting vacuum impregnation cover, while molten steel is flowed into vacuum impregnation cover from the gap between sawtooth.By Vaccum Permeating
When stain cover is applied to the cast of ladle, when liquid level is less than the height of sawtooth in ladle, which stops cast；By Vaccum Permeating
When stain cover is applied to the cast of tundish, when the liquid level in tundish is less than 30~50mm, tundish stops cast.
Under the action of atmospheric pressure, molten steel is pressed into vacuum impregnation cover, due to vacuum impregnation cover be located at the mouth of a river just on
Side so that in cast latter stage, the molten steel liquid level above the mouth of a river stills remain in the height of vacuum impregnation cover, be 400~
700mm, under so high liquid level, substantially will not eddy generation slag phenomenon, even if there is clinker to flow into vacuum impregnation cover,
Rising phenomenon can also occur for the clinker 5 flowed into from vacuum impregnation cover bottom, can float up to the top of impregnating cover.
Vacuum impregnation cover can arrange the clinker above the mouth of a river, and can play pushing off the slag effect will not substantially stop the stream of molten steel again
It is dynamic, be conducive to continuous casting and stablize and efficiently run.
Embodiment 1,
The vacuum impregnation cover of processing as shown in Figure 1, Figure 2, Figure 3 shows, in the cast latter stage of ladle, puts to ladle nozzle surface
The vacuum impregnation cover of a frusto-conical is put, the height of vacuum impregnation cover is 400, base diameter 600mm, and top diameter is
500mm, the structure of the vacuum impregnation cover of the frusto-conical are divided into two layers inside and outside, the internal layer 2 of vacuum impregnation cover is bottom opening,
The hollow frusto-conical shape refractory material of top seal shape, material are corundum, the bottom of hollow frusto-conical shape refractory material
For zigzag annulus 22, the height of sawtooth is 10mm, and the outer layer of vacuum impregnation cover is hollow section of the equal seal shape in bottom and top
Coniform device, material is sheet metal, the pipeline 13 and valve 14 vacuumized is equipped with the bottom 12 of layer structure, using outer
Portion's vacuum extractor closes valve 14 after vacuum impregnation cover is vacuumized, and vacuum impregnation cover is spare.
In steel ladle pouring latter stage, when molten steel liquid level is less than 200mm, is hung with compact electromagnetic and vacuum impregnation cover is hung in into ladle
The mouth of a river or the top of middle water containing opening 6, and fallen into vacuum impregnation cover in molten steel with the speed of 5mm/s, vacuum impregnation covers on down
During drop, the sheet metal 12 of bottom is melted by molten steel 4 in layer structure 1, and under the action of atmospheric pressure, molten steel 4 is by true
The bottom of empty impregnating cover is pressed into vacuum impregnation cover, meanwhile, it is molten by molten steel with the steel plate at steel contacts position in layer structure 1
Change, after vacuum impregnation cover drops to ladle bottom, the zigzag annulus 22 of hollow frusto-conical shape refractory material bottom plays branch
The effect of vacuum impregnation cover is supportted, while molten steel is flowed into vacuum impregnation cover from the gap between sawtooth.Liquid level is less than sawtooth in ladle
Height when, the heat of molten steel stop cast.
Under the action of atmospheric pressure, molten steel is pressed into vacuum impregnation cover, due to vacuum impregnation cover be located at the mouth of a river just on
Side so that in cast latter stage, the molten steel liquid level above the mouth of a river stills remain in the height of vacuum impregnation cover, is 400mm, such as
Under this high liquid level, substantially will not eddy generation slag phenomenon, even if there is clinker to flow into vacuum impregnation cover, and from Vaccum Permeating
Rising phenomenon can also occur for the clinker 5 that stain cover bottom flows into, and can float up to the top of impregnating cover.
By using vacuum impregnation cover, solves vortex slag this problem, it is possible to achieve the low liquid level cast of molten steel, energy
Big Baogang's water casting surplus more than 60% is reduced, that is, adds the rate of steel products produced to steel ingots, and saved resource.
Embodiment 2,
The vacuum impregnation cover of processing as shown in Figure 1, Figure 2, Figure 3 shows, in the cast latter stage of tundish, to middle water containing opening just
The vacuum impregnation cover of a frusto-conical is placed in top, and the height of vacuum impregnation cover is 700mm, base diameter 200mm, is pushed up
The structure of the vacuum impregnation cover of a diameter of 150mm frusto-conicals in portion is inside and outside two layers, and the internal layer 2 of vacuum impregnation cover is bottom
Opening, the hollow frusto-conical shape refractory material of top seal shape, material is corundum, hollow frusto-conical shape refractory material
Bottom is zigzag annulus 22, and the height of sawtooth is 20mm, and the outer layer of vacuum impregnation cover is in the equal seal shape in bottom and top
Empty frusto-conical device, material are sheet metal, and the pipeline 13 and valve 14 vacuumized is equipped with the bottom 12 of layer structure, is adopted
Valve 14 is closed after vacuum impregnation cover is vacuumized with exterior vacuum extractor, vacuum impregnation cover is spare.
In the cast latter stage of tundish, when molten steel liquid level is less than 400mm, is hung with compact electromagnetic and hang in vacuum impregnation cover
The top of ladle nozzle or middle water containing opening 6, and fallen into vacuum impregnation cover in molten steel with the speed of 15mm/s, vacuum impregnation cover
During decline, the sheet metal 12 of bottom is melted by molten steel 4 in layer structure, and under the action of atmospheric pressure, molten steel 4 passes through
The bottom of vacuum impregnation cover is pressed into vacuum impregnation cover, meanwhile, the steel plate in layer structure 1 with steel contacts position is by molten steel
Dissolve, after vacuum impregnation cover drops to tundish bottom, the zigzag annulus 22 of hollow frusto-conical shape refractory material bottom rises
To the effect of support vacuum impregnation cover, while molten steel is flowed into vacuum impregnation cover from the gap between sawtooth.Liquid level in tundish
During less than 30mm, tundish stops cast.
Under the action of atmospheric pressure, molten steel is pressed into vacuum impregnation cover, due to vacuum impregnation cover be located at the mouth of a river just on
Side so that in cast latter stage, the molten steel liquid level above the mouth of a river stills remain in the height of vacuum impregnation cover, is 700mm, such as
Under this high liquid level, substantially will not eddy generation slag phenomenon, even if there is clinker to flow into vacuum impregnation cover, and from Vaccum Permeating
Rising phenomenon can also occur for the clinker 5 that stain cover bottom flows into, and can float up to the top of impregnating cover.
By using vacuum impregnation cover, solves vortex slag this problem, it is possible to achieve the low liquid level cast of molten steel, energy
Metal in Tundish casting surplus more than 70% is reduced, that is, adds the rate of steel products produced to steel ingots, and saved resource.
Claims (8)
1. a kind of casting process reduces the device of molten steel casting surplus, including impregnating cover, it is characterised in that the impregnating cover is butt
Coniform vacuum impregnation cover；The height of vacuum impregnation cover is 400~700mm.
2. casting process as claimed in claim 1 reduces the device of molten steel casting surplus, it is characterised in that at the top of vacuum impregnation cover
The circle of cross section, a diameter of 150~500mm；The circle of vacuum impregnation cover bottom cross section, a diameter of 200~600mm.
3. casting process as claimed in claim 1 reduces the device of molten steel casting surplus, it is characterised in that the frusto-conical
The structure of vacuum impregnation cover be inside and outside two layers, the endothecium structure of vacuum impregnation cover is bottom opening, top seal shape it is hollow
Frusto-conical refractory material, material are corundum, and the bottom of hollow frusto-conical shape refractory material is zigzag annulus, sawtooth
Height be 10~20mm；The layer structure of vacuum impregnation cover fills for the hollow frusto-conical shape of the equal seal shape in bottom and top
Put, material is sheet metal, and the pipeline and valve vacuumized is equipped with the bottom of layer structure.
4. a kind of method that casting process reduces molten steel casting surplus, it is characterised in that in the cast latter stage of ladle or tundish, to
The vacuum impregnation cover of a frusto-conical, vacuum impregnation cover are placed in the molten steel of the surface of ladle nozzle or middle water containing opening
Height be 400~700mm, before vacuum impregnation cover is put into molten steel, the inside of vacuum impregnation cover is vacuum state, by vacuum
After impregnating cover is put into molten steel, molten steel melts away the bottom of vacuum impregnation cover, and molten steel is influenced to be pressed into vacuum by atmospheric pressure
In impregnating cover, molten steel liquid level in vacuum impregnation cover rise, since vacuum impregnation cover is in the top at the mouth of a river so that in ladle or
The cast latter stage of tundish, mouth of a river top still have the molten steel liquid level of 400~700mm height, realize local high liquid level and pour
Note, still will not eddy generation slag phenomenon in cast latter stage.
5. the method that casting process as claimed in claim 4 reduces molten steel casting surplus, it is characterised in that in ladle or tundish
Cast latter stage, hung with compact electromagnetic and hang in vacuum impregnation cover in the molten steel above ladle nozzle or middle water containing opening, vacuum
Impregnating cover can arrange the top slag on liquid steel level, and vacuum impregnation is covered on during decline, the layer structure quilt of sheet metal matter
Molten steel melts, and under the action of atmospheric pressure, molten steel is pressed into vacuum impregnation cover from the bottom of vacuum impregnation cover, in atmospheric pressure
Under the action of power, molten steel is pressed into vacuum impregnation cover, since vacuum impregnation cover is located at the surface at the mouth of a river so that at cast end
Phase, the molten steel liquid level above the mouth of a river highly remain as the height of vacuum impregnation cover, are 400~700mm, in so high liquid level
Under, substantially will not eddy generation slag phenomenon, even if having clinker flow into vacuum impregnation cover in, due to molten steel liquid level in impregnating cover
Higher, rising phenomenon can also occur for the clinker flowed into from vacuum impregnation cover bottom, can float up to the top of impregnating cover.
6. the method that casting process as claimed in claim 4 reduces molten steel casting surplus, it is characterised in that in ladle or tundish
Cast latter stage, when molten steel liquid level is less than 200~400mm, to the surface of ladle nozzle or middle water containing opening place one
The vacuum impregnation cover of frusto-conical.
7. the method that casting process as claimed in claim 6 reduces molten steel casting surplus, it is characterised in that in ladle or tundish
Cast latter stage, when molten steel liquid level is less than 200~400mm, with compact electromagnetic hang by vacuum impregnation cover hang in ladle nozzle or
The top of middle water containing opening, and fallen into vacuum impregnation cover in molten steel with the speed of 5~15mm/s.
8. the method for reducing molten steel casting surplus such as claim 4-7 any one of them casting process, it is characterised in that by vacuum
When impregnating cover is applied to the cast of tundish, when the liquid level in tundish is less than 30~50mm, tundish stops cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810038562.3A CN107983944B (en) | 2018-01-13 | 2018-01-13 | Method and device for reducing molten steel casting allowance in continuous casting process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810038562.3A CN107983944B (en) | 2018-01-13 | 2018-01-13 | Method and device for reducing molten steel casting allowance in continuous casting process |
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| CN107983944B CN107983944B (en) | 2023-06-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108705059A (en) * | 2018-05-29 | 2018-10-26 | 马鞍山尚元冶金科技有限公司 | It is useless to pour remaining straight forming method |
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| CN108705059B (en) * | 2018-05-29 | 2019-12-13 | 马鞍山尚元冶金科技有限公司 | direct forming method for waste casting residue |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107983944B (en) | 2023-06-30 |
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