CN110426565A - Electromagnetic field and flow field physical simulating device and method in a kind of secondary cooling area for continuous casting molten steel - Google Patents
Electromagnetic field and flow field physical simulating device and method in a kind of secondary cooling area for continuous casting molten steel Download PDFInfo
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- CN110426565A CN110426565A CN201910800594.7A CN201910800594A CN110426565A CN 110426565 A CN110426565 A CN 110426565A CN 201910800594 A CN201910800594 A CN 201910800594A CN 110426565 A CN110426565 A CN 110426565A
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- electromagnetic field
- secondary cooling
- continuous casting
- flow field
- storing liquid
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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
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/181—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for electric and magnetic fields; for voltages; for currents
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Abstract
This hair proposes a kind of secondary cooling area for continuous casting electromagnetic field and flow field physical simulating device and method, including secondary cooling zone physical simulation system, two-dimensional movement device, electromagnetic field and flow field survey system and control system.When measuring secondary cooling area for continuous casting electromagnetic field and Flow Field Distribution using the device, a certain amount of low melting point liquid alloy is first added into device for storing liquid, electromagnetic field generator moves to device for storing liquid bottom, then the speed that electromagnetic field generator moves up is set by control system, after the completion of setting, open motor switch, control electromagnetic field generator moves upwards, to simulate the downward process of billet withdrawal of slab in continuous casting process, while electromagnetic field and flow field survey device measure the Distribution of Magnetic Field and Flow Field Distribution of low melting point liquid alloy in device for storing liquid.The present invention can electromagnetic field and Flow Field Distribution be regular with the flowing of physical analogy secondary cooling area for continuous casting molten steel, and in accurate measurement secondary cooling zone, to provide help to the mechanism of action of secondary cooling area for continuous casting for research electromagnetic field.
Description
Technical field
The invention belongs to continuous casting of iron and steel technical field, in particular to electromagnetic field and flow field object in a kind of secondary cooling area for continuous casting molten steel
Manage simulator and method.
Background technique
Current 90% or more steel are all to be produced using continuous casting mode, however divide crystallization and a volume contraction due to selecting, gold
Belong in process of setting inevitably component segregation and the defects of loose shrinkage cavity.It is higher for alloying element content
Special steel, these defects are especially prominent, it has also become the bottleneck that continuous casting billet quality is promoted.Therefore, mitigate and eliminate each in continuous casting billet
Kind defect becomes the key point of the quality and yield that improve continuous casting.
The study found that secondary cooling area for continuous casting, which applies electromagnetic field, effectively can be mitigated and be disappeared by thinning metal solidification texture
Except various defects, equiaxial crystal ratio is improved, improves component segregation.But since continuous casting has the characteristics that high temperature, opaque,
So that the measurement of secondary cooling area for continuous casting molten steel flow field, electromagnetic field becomes extremely difficult under electromagnetic field effect, cause people to electromagnetism
The refinement mechanism of field is unclear.Currently, the distribution of research secondary cooling area for continuous casting molten steel built-in field and flow field mainly uses number
It is worth the method for simulation, but during sunykatuib analysis, often boundary condition and material properties is simplified, so as to cause mould
Quasi- resultant error is larger, and the model used is different with the form of discretization, can also make analog result different.
Summary of the invention
Goal of the invention: to solve the above problem in the prior art, an object of the present disclosure is to provide a kind of continuous casting two cold
Electromagnetic field and flow field physical simulating device in area's molten steel, can accurately be measured in continuous casting process in secondary cooling zone by the device
Electromagnetic field and Flow Field Distribution rule；Second purpose of the invention is to provide electromagnetic field and flow field point in invention device measurement secondary cooling zone
The application method of cloth rule.
Technical solution: to achieve the purpose of the present invention, the technical scheme adopted by the invention is that: the present invention is used to the company of measurement
Cast secondary cooling zone molten steel in electromagnetic field and the physical simulating device in flow field, including secondary cooling zone physical simulation system, two-dimensional movement device,
Electromagnetic field and flow field survey system and control system.The secondary cooling zone physical simulation system is by device for storing liquid, low melting point liquid gold
Belong to and electromagnetic field generator composition, two-dimensional movement device are made of motor, screw rod and shaft coupling, electromagnetic field and flow field survey system
System is made of magnetic field measuring device and flow rate measuring device.
Further, electromagnetic field generator is connected with the screw rod in two-dimensional movement device, and screw rod and motor pass through shaft coupling
Device is connected, thus the speed moved up and down by the revolving speed for controlling motor come control coil.Flow rate measuring device is placed on liquid storage
Bottom of device, top or side, electromagnetic field measuring device measure magnetic field strength from device for storing liquid top.Motor, electromagnetic field and
Flow field survey device is connected with control system respectively.Low melting point liquid metal is housed in device for storing liquid.
Further, electromagnetic field generator is preferably coil or magnetic stirrer, device for storing liquid height be 100mm~
5000mm, internal diameter are 10mm~2000mm, and preferably cylindrical, rectangular, the low melting point liquid alloy in device for storing liquid is preferably
It is the GaInSn alloy or mercury of liquid under room temperature, motor is preferably stepper motor or servo motor.
The present invention measures the method for electromagnetic field and Flow Field Distribution in secondary cooling area for continuous casting using above-mentioned device, and this method includes
Following steps: a certain amount of low melting point liquid alloy is first added into device for storing liquid, electromagnetic field generator moves to device for storing liquid
Then bottom sets the speed that electromagnetic field generator moves up by control system, after the completion of setting, open motor and open
It closes, control electromagnetic field generator moves upwards, to simulate the downward process of billet withdrawal of slab in continuous casting process, while electromagnetic field
And flow field survey device measures the Distribution of Magnetic Field and Flow Field Distribution of low melting point liquid alloy in device for storing liquid.
Further, electromagnetic field generator moves up speed control between 0.01m/s~1m/s, electromagnetic field and stream
Field measurement device can measure magnetic field and the Flow Field Distribution of different location simultaneously.
The utility model has the advantages that compared with prior art, technical solution of the present invention has following advantageous effects:
The present invention can with the flowing of physical analogy secondary cooling area for continuous casting molten steel, and in accurate measurement secondary cooling zone electromagnetic field and
Flow Field Distribution rule, to provide help to the mechanism of action of secondary cooling area for continuous casting for research electromagnetic field.Moreover, being surveyed using the device
It is simple to measure the method in electromagnetic field and flow field in secondary cooling area for continuous casting, strong operability.
Detailed description of the invention
Fig. 1 is secondary cooling area for continuous casting electromagnetic field of the present invention and flow field physical simulating device structural schematic diagram, the stream in the device
Field measurement device measures melt flow from device for storing liquid bottom；
Fig. 2 is secondary cooling area for continuous casting electromagnetic field of the present invention and flow field physical simulating device structural schematic diagram, the stream in the device
Field measurement device measures melt flow at the top of device for storing liquid；
Fig. 3 is secondary cooling area for continuous casting electromagnetic field of the present invention and flow field physical simulating device structural schematic diagram, the stream in the device
Field measurement device measures melt flow from device for storing liquid side wall；
Label declaration in attached drawing: (1) device for storing liquid, (2) electromagnetic field generator, (3) low melting point liquid metal, (4)
Screw rod, (5) shaft coupling, (6) motor, (7) sliding block, (8) flow field survey device, (9) electromagnetic field measuring device, (10) connecting line,
(11) control system.
Specific embodiment
Further details of the technical solution of the present invention with reference to the accompanying drawings and embodiments.
Embodiment 1 uses Fig. 1 shown device, measures melt flow from device for storing liquid bottom
(1) it is 10mm, outer diameter 12mm to the internal diameter made of lucite tube, is added in the device for storing liquid of high 100mm
The GaInSn low-melting alloy of high 75mm；
(2) three flow field survey devices are individually positioned at the center of device for storing liquid bottom, at 1/2R and edge, it will
Electromagnetic field measuring device injects in GaInSn low-melting alloy at the top of device for storing liquid；
It (3) is 12mm by internal diameter, the coil of outer diameter 22mm, high 50mm move to device for storing liquid bottom by control system；
(4) speed that coil moves up is set as 0.01m/s by control system, the pulse current being passed through in coil is strong
Degree is 1000A, frequency 30Hz, pulsewidth 3ms；
(5) start motor, electromagnetic field measuring device and flow field survey device simultaneously, divide during coil moves up
Not Ce Liang magnetic distribution and Flow Field Distribution in melt, and then electromagnetic field and flow field in secondary cooling zone in physical analogy continuous casting process
The regularity of distribution.
Embodiment 2 uses Fig. 1 shown device, measures melt flow from device for storing liquid bottom
(1) it is made to bottom of lucite tube, the internal diameter that side wall is made of stainless steel is 2000mm, and outer diameter is
The GaInSn low-melting alloy of high 4000mm is added in the device for storing liquid of high 5000mm by 2100mm；
(2) three flow field survey devices are individually positioned at the center at the top of liquid storage, at 1/2R and edge, by electromagnetism
Field measurement device injects in GaInSn low-melting alloy at the top of device for storing liquid；
It (3) is 2100mm by internal diameter, the coil of outer diameter 2200mm, high 300mm move to device for storing liquid bottom by control system
Portion；
(4) speed that coil moves up is set as 1m/s by control system, the pulse current intensity being passed through in coil
For 2000A, frequency 5Hz, pulsewidth 10ms；
(5) start motor, electromagnetic field measuring device and flow field survey device simultaneously, divide during coil moves up
Not Ce Liang magnetic distribution and Flow Field Distribution in melt, and then electromagnetic field and flow field in secondary cooling zone in physical analogy continuous casting process
The regularity of distribution.
Embodiment 3 uses Fig. 1 shown device, measures melt flow from device for storing liquid bottom
It (1) is 1000mm, outer diameter 1100mm to the internal diameter made of lucite tube, in the device for storing liquid of high 2500mm
The GaInSn low-melting alloy of high 2000mm is added；
(2) three flow field survey devices are individually positioned in the bottom, center and top of liquid storage side wall, by electromagnetic field measurements
Device injects in GaInSn low-melting alloy at the top of device for storing liquid；
It (3) is 1100mm by internal diameter, the coil of outer diameter 1200mm, high 300mm move to device for storing liquid bottom by control system
Portion；
(4) speed that coil moves up is set as 0.5m/s by control system, the pulse current being passed through in coil is strong
Degree is 3000A, frequency 10Hz, pulsewidth 20ms；
(5) start motor, electromagnetic field measuring device and flow field survey device simultaneously, divide during coil moves up
Not Ce Liang magnetic distribution and Flow Field Distribution in melt, and then electromagnetic field and flow field in secondary cooling zone in physical analogy continuous casting process
The regularity of distribution.
Claims (5)
1. a kind of secondary cooling area for continuous casting electromagnetic field and flow field physical simulating device, which is characterized in that the device includes by device for storing liquid
(1), the secondary cooling zone physical simulation system of electromagnetic field generator (2) and low melting point liquid metal (3) composition, control electromagnetic field hair
The two-dimensional movement device that generating apparatus (2) moves up and down, and be made of electromagnetic field measuring device (9), flow field survey device (8)
Electromagnetic field and flow field survey system；The two-dimensional movement device is by screw rod (4), motor (6), shaft coupling (5) and sliding block (7) group
At；The electromagnetic field generator (2) is in the outside of device for storing liquid (1), and low melting point liquid metal (3) device is in device for storing liquid
(1) in, the two-dimensional movement device and electromagnetic field and flow field survey system are uniformly controlled by control system (11).
2. a kind of secondary cooling area for continuous casting electromagnetic field according to claim 1 and flow field physical simulating device, which is characterized in that institute
Device for storing liquid (1) is stated to be cylindrical, rectangular, it is liquid that the low melting point liquid alloy (3) in device for storing liquid (1), which is under room temperature,
GaInSn alloy or mercury, electromagnetic field generator (2) are coil or magnetic stirrer.
3. a kind of secondary cooling area for continuous casting electromagnetic field according to claim 1 or 2 and flow field physical simulating device, feature exist
Be placed on device for storing liquid (1) bottom, top or side in, the flow field survey device (8), electromagnetic field measuring device (9) from
Device for storing liquid (1) top measures magnetic field strength.
4. a kind of secondary cooling area for continuous casting electromagnetic field according to claim 1 or 2 and flow field physical simulating device, feature exist
In the electromagnetic field generator (2) is connected by sliding block (7) with the screw rod (4) in two-dimensional movement device, screw rod (4) and electricity
Machine (6) is connected by shaft coupling (5).
5. using the method for electromagnetic field and Flow Field Distribution in claim 1-4 described in any item device measurements secondary cooling area for continuous casting,
It is characterized in that, this method comprises the following steps: a certain amount of low melting point liquid alloy (3) is first added into device for storing liquid (1),
Electromagnetic field generator (2) moves to device for storing liquid (1) bottom, then sets electromagnetic field generator by control system (11)
(2) speed moved up opens motor (6) switch after the completion of setting, and control electromagnetic field generator (2) moves upwards,
To simulate the downward process of billet withdrawal of slab in continuous casting process, while electromagnetic field measuring device (9) and flow field survey device (8) are surveyed
Measure the Distribution of Magnetic Field and Flow Field Distribution of low melting point liquid alloy (3) in device for storing liquid (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910800594.7A CN110426565B (en) | 2019-08-28 | 2019-08-28 | Physical simulation device and method for electromagnetic field and flow field in molten steel in secondary cooling zone of continuous casting |
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| CN201910800594.7A CN110426565B (en) | 2019-08-28 | 2019-08-28 | Physical simulation device and method for electromagnetic field and flow field in molten steel in secondary cooling zone of continuous casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794164A (en) * | 2019-12-13 | 2020-02-14 | 中国科学院大学 | System and method for measuring high space-time precision of liquid metal velocity field under strong magnetic field |
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