CN108500227A - Crystallizer flow field Electromagnetic Control method for sheet billet continuous casting production - Google Patents
Crystallizer flow field Electromagnetic Control method for sheet billet continuous casting production Download PDFInfo
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- CN108500227A CN108500227A CN201710107016.6A CN201710107016A CN108500227A CN 108500227 A CN108500227 A CN 108500227A CN 201710107016 A CN201710107016 A CN 201710107016A CN 108500227 A CN108500227 A CN 108500227A
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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
- 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
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
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Abstract
The invention discloses a kind of crystallizer flow field Electromagnetic Control methods for sheet billet continuous casting production, control crystallizer flow field using more set magnetic stirrers, which is traveling-wave magnetic field generator, in the wide face of crystallizer（9）Upper area and crystallizer leptoprosopy（3）Lower area be each configured with magnetic stirrer, top magnetic stirrer（4）It is installed on the mouth of a river（2）It exports above upper edge to meniscus（1）Between, lower part magnetic stirrer（7）It is installed on mouth of a river side opening and spues and flow the shock point lower section of stock and leptoprosopy；Upper and lower part magnetic stirrer independently controls current strength respectively by power supply power supply.Lower part magnetic stirrer iron core upper edge with using water-gap outlets upper edge by starting point, water-gap outlets angle be that angle makees straight line（6）Be located at sustained height with crystallizer leptoprosopy intersection point, stirring coil mixing direction from the bottom to top, with lower circulation along the stream stock of narrow side（5）Direction is on the contrary, be used to weaken the impact depth of lower circulation stream stock.
Description
Technical field
The present invention relates to a kind of crystallizer control technologies of sheet billet continuous casting production, more particularly to a kind of sheet billet continuous casting that is used for give birth to
The crystallizer flow field Electromagnetic Control method of production.
Background technology
During sheet billet continuous casting, molten steel enters continuous cast mold by submersed nozzle, and steel flow stock is in impact crystallizer
It is flowed respectively to upper and lower both direction after leptoprosopy, to form two circulation up and down in crystallizer.Upper circulation dominates crystallization
MOLTEN STEEL FLOW near device meniscus, affect covering slag melting, sprawl and the volume of covering slag inhale；The impact depth branch of lower circulation
Match the floating separation on field trash and bubble.Therefore, it is necessary to be carried out to the MOLTEN STEEL FLOW in crystallizer in terms of following two
Control：（1）Necessary stable meniscus, reduces the reverse flow risen along solidification front, makes to keep level appropriate under meniscus
Flow velocity.Flow velocity easily causes meniscus disturbance very much soon, causes covering slag volume to be inhaled, is captured inside strand and becomes internal and subcutaneous
Defect；Flow velocity is too slow, and nearby initial solidification is flourishing for meniscus, and field trash and bubble are solidified the solidification hook held in front and capture
For surface defect.（2）Must be prevented from spuing from submersed nozzle side opening invades liquid core depths to dirty stock, to be conducive to press from both sides
The floating of sundries and bubble detaches.Electromagnetic force have the advantages that it is non-contact, free of contamination, in terms of controlling molten steel in mold flowing
It is widely used in a variety of applications.What is generally used at present has M-EMS technology and mould electromagnetic brake technology.
Electromagnetic agitating technology is the movement for strengthening liquid core molten steel by the electromagnetic force inducted in casting blank liquid core, thus
Convection current, heat transfer and the mass transport process for strengthening molten steel play the role of improving slab quality to control the process of setting of strand.
Magnetic stirrer includes mainly stirring coil and iron core.Japan Patent JP57017355A discloses a kind of traveling wave for slab
Magnetic stirrer is respectively arranged a linear blender, the mixing direction of two blenders along the both sides of plate slab crystallizer broadside
On the contrary, a complete circulation therefore can be formed in crystallizer.Chinese patent CN96121903.3 proposes to crystallize along slab
Respectively two blenders of arrangement, two blenders per side are covered each by 1/2 wide face of crystallizer for the both sides of device broadside.With it is traditional
Annular stirring is compared, and is had certain adjustability, be can adapt to more working conditions.Chinese patent CN200910302486.3
It is proposed will at least be divided into 4 field regions in crystallizer, by combination, it can be achieved that single rotation, electromagnetic deceleration, electromagnetism acceleration,
Twoth area rotate the inductor that this five kinds of stirring modes are rotated with 4th area.Latter two blender substantially with the first blender only
Only it is the difference in structure, principle is consistent.The technology of above-mentioned exclusive use electromagnetic agitation can form level in crystallizer
The circulation in direction, the molten steel flow speed of stable meniscus attachment, but can not reduce spue from submersed nozzle side opening to flow down
The depth of stock intrusion liquid core, can not improve the floating condition of non-metallic inclusion herein and bubble.
The mouth of a river, which spues, when for high pulling rate flows the deeper problem of stock impact, electromagnetic brake technology is developed, by applying
Add a magnetostatic field in the molten steel of high-speed motion, its absolute velocity is reduced by incuding the Lorentz force generated, to reduce steel
Liquid impact depth, and then improve the floating condition of non-metallic inclusion and bubble herein.By the technology together with electromagnetic agitation
The characteristics of using, making full use of two kinds of technologies, the application method for playing the advantages of two kinds of technologies also continue to bring out.Chinese patent
The method that CN201080019323, CN201080019325 are stirred using lower part braking, top, in sheet billet continuous casting production process
In, both technologies have been applied in combination.But electromagnetic brake technology is a kind of " passive " technology, by molten steel cutting magnetic induction line
The electromagnetic force of generation is braked, and the size of brake force is largely dependent upon the size of molten steel flow speed, only drawing
In the case of speed is very high, molten steel flow speed is very high, certain improvement result can be played to the impact depth of molten steel；For middle height
For the slab production technology of pulling rate, effect is limited.When one timing of molten steel flow speed, if further to promote the electromagnetism of braking
Power can only rely on and improve static magnetic field strength to solve, this considerably increases difficulty to the making etc. of electromagnetic braking power supply, coil.
Using the method for lower part stirring, top braking, the purpose is to be conducive to electromagnetic agitation by Chinese patent CN1266759A, CN1302703A
Technology improves Solidification Quality, stablizes liquid fluctuating using electromagnetic brake technology.Magnetic stirrer is placed in below mold gap,
Electromagnetic force along crystallizer horizontal direction interacts with the oblique dirty stock that mouth of a river side opening spues, if is conducive to slab quality
Improvement it is also to be verified, but to reduce mouth of a river side opening spue stream stock impact depth effect it is fairly limited, also can not be effective
Improvement crystallizer in the floating condition of non-metallic inclusion and bubble.
Invention content
The purpose of the present invention is to provide a kind of crystallizer flow field Electromagnetic Control method for sheet billet continuous casting production, the party
Method reasonably arranges magnetic stirrer by the local location in crystallizer, to control molten steel in mold flowing, effectively
The impact depth for reducing lower circulation, improves the floating condition of non-metallic inclusion and bubble, achievees the purpose that improve slab quality.
In order to realize that above-mentioned technical proposal, the present invention adopt the following technical scheme that：
A kind of crystallizer flow field Electromagnetic Control method for sheet billet continuous casting production controls crystallization using more set magnetic stirrers
Device flow field, which is traveling-wave magnetic field generator, under the upper area and crystallizer leptoprosopy in the wide face of crystallizer
Portion region is each configured with magnetic stirrer, and top magnetic stirrer is installed on above water-gap outlets upper edge between meniscus,
Lower part magnetic stirrer, which is installed on mouth of a river side opening and spues, flows the shock point lower section of stock and leptoprosopy；Upper and lower two magnetic stirrers point
Not by two sets of power supply power supplies, and it can independently control current strength.
The top magnetic stirrer drives molten steel to make relative horizontal movement respectively in the magnetic field of the wide face both sides of crystallizer, on
Portion's electromagnetic agitation covers water-gap outlets upper edge to the region between meniscus, and coating ratio is more than 0.75, i.e. top electromagnetic agitation
Ratio between device iron core height and water-gap outlets upper edge to the distance between meniscus is more than 0.75.
The lower part magnetic stirrer is two groups of stirring coils, is located at crystallizer leptoprosopy side, lower part electromagnetic agitation
Device iron core upper edge be intersection point that angle makees straight line and crystallizer leptoprosopy using water-gap outlets upper edge by starting point, water-gap outlets angle
Positioned at sustained height, the mixing direction of each group stirring coil from the bottom to top, with lower circulation along the stream stock direction of narrow side on the contrary, being used for
Weaken the impact depth of lower circulation stream stock.
When width of plate slab changes, in horizontal direction, the wide copper coin of the lower part magnetic stirrer and crystallizer tune one
Play movement；On vertical direction, the lower part magnetic stirrer adjusts upper and lower position using elevating mechanism, makes lower part magnetic stirrer
For upper edge always with using water-gap outlets upper edge as starting point, water-gap outlets angle is made the point of intersection of straight line and crystallizer leptoprosopy by angle
In sustained height.
The lower part magnetic stirrer is four groups of stirring coils, each wide two groups of stirring coils in face of crystallizer, same crystallization
Two groups of stirring coils in the wide face of device are respectively close to two leptoprosopy of crystallizer, and using the vertical center line of crystallizer as axial symmetry cloth
It sets；Close to same crystallizer leptoprosopy, two groups of stirring coils being located at two wide faces of crystallizer, in arrangement face-to-face；Under
Portion's magnetic stirrer iron core upper edge with using water-gap outlets upper edge by starting point, water-gap outlets angle be that angle makees straight line and crystallizer
The intersection point of leptoprosopy is located at sustained height, the mixing direction of each group stirring coil from the bottom to top, with lower circulation along the stream stock of narrow side
Direction is on the contrary, be used to weaken the impact depth of lower circulation stream stock.
When width of plate slab changes, in horizontal direction, the lower part magnetic stirrer is kept stirring coil and crystallization
The relative position of the wide copper coin of device tune is constant；In the vertical direction, the lower part magnetic stirrer is kept stirring on the iron core of coil
Along with using water-gap outlets upper edge as starting point, the intersection point that water-gap outlets angle is made straight line and crystallizer leptoprosopy by angle is in same
Highly.
When crystallizer flow field Electromagnetic Control method of the present invention for sheet billet continuous casting production is higher for continuous casting pulling rate,
The impact of water-gap outlets stream stock is too deep, is unfavorable for the phenomenon that non-metallic inclusion and bubble floating, according to crystallizer when continuous casting
Interior bicyclic flow structure targetedly applies electromagnetic field in the local location of mould at narrow, to utmostly reduce water
Mouth outlet stream stock impact depth, improves the floating condition of non-metallic inclusion and bubble in crystallizer, reduces it and be solidified initially
The probability of green shell capture, improves continuous casting billet quality.
Crystallizer flow field Electromagnetic Control method using the present invention controls the MOLTEN STEEL FLOW state in crystallizer, profit
The impact depth that lower circulation is actively reduced with the magnetic stirrer of lower part, is conducive to the floating of non-metallic inclusion and bubble；Phase
Than lower part using circulation flow velocity under the passive reduction of electromagnetic brake technology and impact depth for, actively applied using electromagnetic agitating technology
Magnetic force is powered up, has many advantages, such as that parameter regulation range is wide, operation is flexible, grasp production initiative.It can be according to different pulling rates
Technique adjusts the exciting current of upper and lower magnetic stirrer, in bigger flow velocity section to the flow field of molten steel in crystallizer into
Row is actively adjusted, and is reached preferably electromagnetism flow control effect, may finally be obtained good continuous casting billet.
The present invention is used for the crystallizer flow field Electromagnetic Control method of sheet billet continuous casting production, and the flow field being conceived in crystallizer changes
It is kind, it reasonably arranges multiple magnetic stirrers by the different local locations in crystallizer, reaches optimization crystallizer flow field
Effect, and then improve the quality of continuous casting billet.This method can be main according to actual continuous casting process, such as different steel grade and pulling rate
The dynamic MOLTEN STEEL FLOW state adjusted in crystallizer, stream field can be adjusted, initiative is strong, has in wider array of velocity interval
Wide prospect of the application.
Description of the drawings
Fig. 1 is crystallizer flow field Electromagnetic Control method schematic diagram of the present invention for sheet billet continuous casting production；
Fig. 2 is a kind of schematic three dimensional views of arrangement form of magnetic stirrer of the crystallizer flow field Electromagnetic Control method of the present invention；
Fig. 3 is the three-dimensional signal of the magnetic stirrer another kind arrangement form of the crystallizer flow field Electromagnetic Control method of the present invention
Figure.
In figure：1 meniscus, 2 mouths of a river, 3 narrow face copper plate of crystallizer（Adjust wide copper coin）, 4 top magnetic stirrers, the punching of 5 molten steel
Hit stream stock, 6 using water-gap outlets upper edge by starting point, water-gap outlets angle be that angle makees straight line, 7 lower part magnetic stirrers（Stirring
Coil）, 8 hydraulicefficiency elevation structures, the wide face of 9 crystallizers.
Specific implementation mode
The invention will be further described in the following with reference to the drawings and specific embodiments.
Referring to Fig. 1, Fig. 2 and Fig. 3, a kind of crystallizer flow field Electromagnetic Control method for sheet billet continuous casting production, using more
Magnetic stirrer is covered to control crystallizer flow field, which is traveling-wave magnetic field generator, and magnetic stirrer includes mainly
Stirring coil and iron core, the magnetic stirrer include top magnetic stirrer 4 and lower part magnetic stirrer 7；In the wide face of crystallizer 9
Upper area be configured with top magnetic stirrer 4, crystallizer leptoprosopy 3 lower area be configured with lower part magnetic stirrer 7,
Top magnetic stirrer 4 is installed on the mouth of a river 2 and exports above upper edge between meniscus 1, and lower part magnetic stirrer 7 is installed on the mouth of a river
2 side openings spue below the shock point for flowing stock and leptoprosopy 3.Upper and lower two magnetic stirrers 4,7 respectively by two sets of power supply power supplies,
And it can independently control current strength.Magnetic stirrer is reasonably arranged by the local location in crystallizer, to control
Molten steel in mold flows, and the effective impact depth for reducing lower circulation improves the floating condition of non-metallic inclusion and bubble,
Reduce it and be solidified the probability of initial green shell capture, achievees the purpose that improve slab quality.
The top magnetic stirrer 4 drives molten steel to make relative horizontal movement respectively in the magnetic field of wide 9 both sides of face of crystallizer,
The crystallizer is plate slab crystallizer, and top electromagnetic agitation covers water-gap outlets upper edge to the region between meniscus, coating ratio
More than 0.75, i.e., the ratio between the distance between 4 iron core height of top magnetic stirrer and the outlet upper edge of the mouth of a river 2 to meniscus 1
Value is more than 0.75.
For the structure of lower part magnetic stirrer 7, there are two types of arrangement forms.A kind of arrangement form mode is, referring to Fig. 2,
The lower part magnetic stirrer 7 is two groups of stirring coils, is located at 3 side of leptoprosopy of crystallizer, 7 iron of lower part magnetic stirrer
Core upper edge be intersection point position that angle makees straight line 6 and crystallizer leptoprosopy 3 using water-gap outlets upper edge by starting point, water-gap outlets angle
In sustained height, the mixing direction of each stirring coil from the bottom to top, with lower circulation along 5 direction of stream stock of narrow side on the contrary, with
In the impact depth for weakening lower circulation stream stock 5.
In process of production, when slab specification, that is, width of plate slab changes, in horizontal direction, the lower part electromagnetism stirs
Device 7 is mixed to move together with wide copper coin 3 is adjusted；On vertical direction, the lower part magnetic stirrer 7 is adjusted using hydraulicefficiency elevation structure 8
Upper and lower position makes 7 upper edge of lower part magnetic stirrer always with using water-gap outlets upper edge as starting point, and water-gap outlets angle is angle institute
Make straight line 6 and the intersection point of crystallizer leptoprosopy 3 is in sustained height.
The arrangement form of another lower part magnetic stirrer is, referring to Fig. 3, the lower part magnetic stirrer 7 is four groups and stirs
Mix coil, each wide 9 two groups of stirring coils in face of crystallizer, two groups of stirring coils in same wide face are two narrow respectively close to crystallizer
Face 3, and arranged by axial symmetry of the vertical center line of crystallizer；Close to crystallizer same leptoprosopy, be located at crystallizer two
Two groups of stirring coils in a wide face, in arrangement face-to-face；7 iron core upper edge of lower part magnetic stirrer with water-gap outlets upper edge be
Point, water-gap outlets angle makees straight line 6 by angle and the intersection point of crystallizer leptoprosopy 3 is located at sustained height, each stirring coil
Mixing direction from the bottom to top, with lower circulation along 5 direction of stream stock of narrow side on the contrary, the impact for weakening lower circulation stream stock 5 is deep
Degree.
In process of production, it when slab specification, that is, width of plate slab changes, is adjusted and is stirred using hydraulicefficiency elevation structure 8
The position of coil.In the horizontal direction, the lower part magnetic stirrer 7 is kept stirring coil and adjusts the relative position of wide copper coin 3
It is constant；In the vertical direction, the iron core upper edge that the lower part magnetic stirrer 7 is kept stirring coil is with water-gap outlets upper edge
Starting point, water-gap outlets angle makees straight line 6 by angle and the intersection point of crystallizer leptoprosopy 3 is in sustained height.
The top magnetic stirrer 4 is in the average magnetic induction intensity at 9 forward position 15mm of Wide-surface copper plate of crystallizer>
0.065T, and its size can be adjusted according to working condition；Electromagnetic agitation frequency is between 1~6Hz, lower part magnetic stirrer 7
Average magnetic induction intensity at the wide 3 forward position 15mm of copper coin of crystallizer leptoprosopy tune>0.1T, and it can be adjusted according to working condition
Size.
Embodiment
Working condition：Produce the IF steel plates of pulling rate 1.6m/s, width 1450mm, thickness 230mm, mouth of a river insertion depth（I.e.
Meniscus to mouth of a river upper edge distance）For 190mm, mouth of a river outer diameter 80mm and own axes are in 75 ° of inclination angles.For this operating mode
Condition uses magnetic stirrer simultaneously using the method for the present invention in the multiple parts of crystallizer, rational to adjust in crystallizer
Flow field.
It is 150mm along the wide face top installation M-emss iron core height of crystallizer, installation site is located at the mouth of a river
It exports between upper edge and meniscus, stirring effective coverage coating ratio is more than 0.75.Two electricity are installed along mould at narrow lower part
Magnetic agitating device, electromagnetic braking iron core upper edge are 180mm apart from mouth of a river discharge hole upper edge.
In production process, top magnetic stirrer is opened, the frequency of magnetic stirrer is 5Hz, what magnetic stirrer generated
Travelling-magnetic-field average magnetic induction intensity at the 15mm of Wide-surface copper plate of crystallizer forward position reaches 700Gauss or so.Magnetic stirrer exists
Induction generates electromagnetic force in molten steel in mold, and molten steel is driven to be moved along the wide face of copper plate of crystallizer, is formed in the horizontal direction
One molten steel circulation.This molten steel movement can wash away the field trash and bubble for taking away solidified shell forward position, them is promoted to float
To meniscus, the defects of reducing field trash and bubble in solidified shell content.It can be seen from Fig. 1 and Fig. 2 generally and
Speech, stir caused by go out to flow Direction of circulation caused by molten steel non-interference MOLTEN STEEL FLOW direction and the mouth of a river, therefore practical life
Good technology stability can be obtained during production.There can also be needle according to the variation of working condition in actual production process
Stirring parameter is controlled to property to control the movement velocity of molten steel, is finally reached ideal mixing effect.
For the working condition in this example, in production process, while also needing to open lower part magnetic stirrer, lower part electromagnetism stirs
Mixing the travelling-magnetic-field of the device generation average magnetic induction intensity crystallizer leptoprosopy tune wide copper coin forward position 15mm at, to reach 1000Gauss left
It is more than the right side.The main function of lower part magnetic stirrer is the flow velocity for slowing down lower circulation steel flow stock, is played in the present invention actively
Reduce the effect of the downward impact depth of molten steel.The reduction and the reduction of lower circulation flow velocity of lower ring current shock depth substantially improve steel
The floating condition of non-metallic inclusion and bubble reduces it to be conducive to the floating of non-metallic inclusion and bubble in water
Be solidified the probability of green shell capture, and then improve the quality of final continuous casting billet.Compared to the company that lower part uses electromagnetic braking
For casting process, lower part can carry out actively the flow field of molten steel in crystallizer in bigger flow velocity section using magnetic stirrer
It adjusts, obtains better metallurgical effect.
The above is merely preferred embodiments of the present invention, be not intended to limit the scope of the present invention, therefore, it is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention should be included in the protection model of the present invention
Within enclosing.
Claims (6)
1. a kind of crystallizer flow field Electromagnetic Control method for sheet billet continuous casting production, it is characterized in that：
Crystallizer flow field is controlled using more set magnetic stirrers, which is traveling-wave magnetic field generator, in crystallizer
The upper area in wide face and the lower area of crystallizer leptoprosopy are each configured with magnetic stirrer, top magnetic stirrer peace
Loaded on between meniscus, lower part magnetic stirrer is installed on mouth of a river side opening and spues stream stock and leptoprosopy above water-gap outlets upper edges
Below shock point；Upper and lower two magnetic stirrers can independently control current strength respectively by two sets of power supply power supplies.
2. the crystallizer flow field Electromagnetic Control method according to claim 1 for sheet billet continuous casting production, it is characterized in that：Institute
State top magnetic stirrer drives molten steel to make relative horizontal movement, top electromagnetic agitation respectively in the magnetic field of the wide face both sides of crystallizer
Water-gap outlets upper edge is covered to the region between meniscus, coating ratio is more than 0.75, i.e. top magnetic stirrer iron core height
Ratio between the distance between water-gap outlets upper edge to meniscus is more than 0.75.
3. the crystallizer flow field Electromagnetic Control method according to claim 1 or 2 for sheet billet continuous casting production, feature
It is：The lower part magnetic stirrer is two groups of stirring coils, is located at crystallizer leptoprosopy side, lower part magnetic stirrer iron core
Upper edge be that angle is made the intersection point of straight line and crystallizer leptoprosopy and is located at together using water-gap outlets upper edge by starting point, water-gap outlets angle
One height, the mixing direction of each group stirring coil from the bottom to top, with lower circulation along the stream stock direction of narrow side on the contrary, for weaken under
The impact depth of circulation stream stock.
4. the crystallizer flow field Electromagnetic Control method according to claim 3 for sheet billet continuous casting production, it is characterized in that：When
When width of plate slab changes, in horizontal direction, the lower part magnetic stirrer is moved together with the wide copper coin of crystallizer tune；Vertically
On direction, the lower part magnetic stirrer using elevating mechanism adjust upper and lower position, make lower part magnetic stirrer upper edge always with
Using water-gap outlets upper edge as starting point, the intersection point that water-gap outlets angle is made straight line and crystallizer leptoprosopy by angle is in same height
Degree.
5. the crystallizer flow field Electromagnetic Control method according to claim 1 or 2 for sheet billet continuous casting production, feature
It is：The lower part magnetic stirrer is four groups of stirring coils, each wide two groups of stirring coils in face of crystallizer, the same wide face of crystallizer
Two groups of stirring coils respectively close to two leptoprosopy of crystallizer, and using the vertical center line of crystallizer as axial symmetry arrange；It is close
Same crystallizer leptoprosopy, two groups of stirring coils being located at two wide faces of crystallizer, in arrangement face-to-face；Lower part electromagnetism stirs
It mixes device iron core upper edge and is friendship that angle makees straight line and crystallizer leptoprosopy using water-gap outlets upper edge by starting point, water-gap outlets angle
Point be located at sustained height, the mixing direction of each group stirring coil from the bottom to top, with lower circulation along the stream stock direction of narrow side on the contrary,
Impact depth for weakening lower circulation stream stock.
6. the crystallizer flow field Electromagnetic Control method according to claim 5 for sheet billet continuous casting production, it is characterized in that：When
When width of plate slab changes, in horizontal direction, the lower part magnetic stirrer is kept stirring coil and the wide copper coin of crystallizer tune
Relative position it is constant；In the vertical direction, the lower part magnetic stirrer is kept stirring the iron core upper edge of coil and with the mouth of a river
Outlet upper edge is starting point, and the intersection point that water-gap outlets angle is made straight line and crystallizer leptoprosopy by angle is in sustained height.
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| CN109604551A (en) * | 2019-01-14 | 2019-04-12 | 辽宁石油化工大学 | A kind of individually adjusted combination electro-magnetic braking device and method controlling molten steel flow |
| CN110303126A (en) * | 2019-08-09 | 2019-10-08 | 湖南中科电气股份有限公司 | A kind of intelligence slab electromagnetic stirring system |
| CN112296294A (en) * | 2020-09-30 | 2021-02-02 | 首钢集团有限公司 | Method for improving cleanliness of plate blank |
| CN112296296A (en) * | 2020-09-30 | 2021-02-02 | 首钢集团有限公司 | Method for controlling liquid level fluctuation of slab crystallizer |
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| CN113441694A (en) * | 2021-05-20 | 2021-09-28 | 山东创新金属科技有限公司 | Casting platform for aluminum alloy electromagnetic stirring continuous ingot casting |
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| CN115194107A (en) * | 2022-07-13 | 2022-10-18 | 沈阳工程学院 | Multi-segment independently adjustable composite magnetic field device and method for controlling molten metal flow |
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