CN107716887B - A kind of lower steel liquid solidification simulator in continuous casting crystallizer of electric pulse effect - Google Patents
A kind of lower steel liquid solidification simulator in continuous casting crystallizer of electric pulse effect Download PDFInfo
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- CN107716887B CN107716887B CN201710930311.1A CN201710930311A CN107716887B CN 107716887 B CN107716887 B CN 107716887B CN 201710930311 A CN201710930311 A CN 201710930311A CN 107716887 B CN107716887 B CN 107716887B
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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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- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
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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
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
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Abstract
The invention discloses a kind of electric pulses to act on lower steel liquid solidification simulator in continuous casting crystallizer, apply electric pulse by solidification of molten steel process in simulation continuous cast mold, measure and calculate crystallizer surface temperature and changes of heat flux curve under different electric pulsing conditions, obtain the solidified shell and slag film under different condition, different electric pulsing conditions are studied to molten steel, Heat transfer between crystallizer, casting blank solidification tissue, the influence of green shell pattern etc., realize that electric pulse acts on the research of solidification of molten steel behavior in lower continuous cast mold, to advanced optimize electric pulsing conditions, so that continuous casting process smoothly efficiently carries out, it is easy to operate, experimental cost is low, it is that a kind of ideal type laboratory research electric pulse acts on solidification of molten steel Behavior modeling research device in lower continuous cast mold.The present invention has the advantages that experimental implementation is easy controllably, process is short, high-efficient, experimentation cost is low etc..
Description
Technical field
Molten steel in lower continuous cast mold is acted on the invention belongs to continuous casting of iron and steel technical field more particularly to a kind of electric pulse to coagulate
Gu simulator.
Background technique
Complexity, high temperature, multiphase, instantaneous physicochemical change occur in continuous casting process for molten steel in continuous cast mold,
Solidification of molten steel behavior in continuous cast mold, the problems such as slab quality can be bred, therefore study solidification of molten steel in continuous cast mold
Behavior has great significance, and especially electric pulse acts on the influence to solidification of molten steel behavior.Electric pulse is as a kind of moment, height
The outfield of density energy form in the existing certain research of different majors and field, and achieves good scientific research benefit.Due to
Environmental-friendly, low power consumption and other advantages mainly include electric pulse in improvement quality of materials and aspect of performance, the research of electroporation
Improve Solidification Structure, refinement crystal grain, improves alloy internal structure and mechanical property, alloy such as steel material surface quality
It repairs, the removal etc. of field trash in molten steel.But the research of forefathers be all only about liquid steel melting simple in melting steel furnace or
The Electric Pulse Treatment of process of setting, there is no inquire into apply electric pulse in continuous casting real process to the shadow of solidification of molten steel process
It rings.
Summary of the invention
The present invention is provided for deficiency existing for current technology and equipment in a kind of electric pulse effect time continuous cast mold
Steel liquid solidification simulator measures crystallizer surface changes of heat flux curve under the conditions of different pulse parameters, obtains electric pulse effect
The mechanism of solidification of molten steel behavior in continuous cast mold is ground in the green shell and slag film of solidification of molten steel process in lower continuous cast mold, realization
Study carefully.
In order to solve the above technical problems, electric pulse provided by the present invention acts on solidification of molten steel simulation in lower continuous cast mold
Device, including base, induction furnace, electronic pulse system, data collection system, throwing device, crystallizer, keeper electrode, throwing motor,
Vibrating motor, positioning motor, the base are equipped with first that two one end are connect perpendicular to the base plane other end with top plate
Screw rod and the second screw rod are equipped with the downlink motor for driving first screw rod and the movement of the second screw rod, in institute on the top plate
It states the first screw rod and the second screw rod is equipped with and drives vertically moving lift bracket by the first screw rod and the second screw rod；Institute
It states induction furnace to be set on the base between the first screw rod and the second screw rod, the throwing motor and vibrating motor are all provided with
It is placed on the lift bracket；It is equipped with thermocouple and cooling system in the crystallizer and is hung down by the driven by vibrating motors
Straight to vibrate up and down, the throwing device is set to the bottom end of the crystallizer and is pulled downward on by the throwing motor driven；Institute
Positioning motor is stated to be arranged on the top plate and the keeper electrode is driven to move up and down；The electronic pulse system includes pulse electricity
Source, two pulse output electrodes for being electrically connected with the pulse power and being oppositely arranged vertically and pulsed electrode mobile device, it is described
Pulsed electrode mobile device is set on the base, and two pulse output electrode is set to the pulsed electrode mobile device
It is upper and can by the pulsed electrode mobile device to its spacing, be inserted into the depth in molten bath and the relative position with the hot face of crystallizer
It is adjusted, the data collection system is electrically connected with the thermocouple, the pulse power and pulsed electrode mobile device.
Further, when the crystallizer sinks to induction furnace straight down, two pulse output electrode is located at the knot
The two sides of brilliant device.
Further, the induction furnace is the intermediate frequency furnace that thermal power is high, heating rate is fast.
Further, the pulse parameter of the pulse power includes crest voltage, pulse pattern, pulse width and frequency, is passed through
The control cabinet being electrically connected with the pulse power is adjusted.
Further, pulse output electrode by electric conductivity good, high temperature resistant and the material not react with covering slag prepare and
At diameter 5mm-15mm.
Further, the pulse power is electrically connected by pulse output lead with two pulse output electrode, wherein
The pulse output lead copper cable low using resistance, specification are >=50mm2.
Further, pulse power output crest voltage is 0-36V, preferably 30V；Exporting electric current (peak value) is 0-
5000A；Output frequency is 1-100Hz, preferably 100Hz；Pulse width is 1 μ s-150 μ s, preferably 100 μ s.
Further, pulse power output waveform is rectangular wave, and output type is positive pulse, interval pulse or counting arteries and veins
Punching.
Further, the plane of two pulse output electrodes composition and the angle in the hot face of crystallizer are between 0 ° -180 °, preferably
It is 180 °；The width of two pulse output electrodes is between 5cm-30cm, preferably 20cm；The depth in molten bath is inserted in 2cm-
Between 30cm, preferably 10cm.
Real-time record and the analysis of molten steel temperature and hot-fluid may be implemented due to devising above-mentioned apparatus in the present invention, can be with
By adjusting pulsed electrode material and power parameter, Heat transfer, casting blank solidification tissue, green shell shape between molten steel, crystallizer are studied
Looks etc..
Advantages of the present invention is briefly described as below:
1) present invention devises the conductive electrode that can flexibly remove and install: can select different resistance according to requirement of experiment
The suitable electrode material of rate, high-temperature stability, chemical stability, dimensions, to reach requirement of experiment.
2) present invention devises visualization electric pulse operating system, it can be achieved that the pulse power is to output crest voltage, output
The control and adjusting of the major influence factors such as electric current (peak value), output frequency, pulse width, output power peak value of pulse meet
Different requirement of experiment.
3) present invention devises pulsed electrode mobile device, not only realizes that electrode is smoothly inserted into and removes high temperature molten bath,
Can also be achieved width and electrode insertion pool depth etc. between the plane of two electrodes composition and the angle in the hot face of crystallizer, electrode influences
Control in molten bath an important factor for electric field strength.
4) different electrode materials is used by simulation, electric pulse effect is to steel when can further investigate various electrode materials
The influence of Heat transfer, casting blank solidification tissue, green shell pattern etc. between liquid, crystallizer.
5) by simulating different electrode insertion positions, electric pulse under the conditions of different electrode insertion positions can be furtherd investigate
Act on the influence between Heat transfer, casting blank solidification tissue, green shell pattern etc. molten steel, crystallizer.
6) by simulating different pulse power parameters, electric pulse under the conditions of different pulse power parameters can be furtherd investigate
Act on the influence between Heat transfer, casting blank solidification tissue, green shell pattern etc. molten steel, crystallizer.
In conclusion the present invention applies electric pulse, measurement and calculating by solidification of molten steel process in simulation continuous cast mold
Crystallizer surface temperature and changes of heat flux curve under different electric pulsing conditions obtain solidified shell and slag film under different condition,
Influence of the different electric pulsing conditions between Heat transfer, casting blank solidification tissue, green shell pattern etc. molten steel, crystallizer is studied, is realized
Electric pulse acts on the research of solidification of molten steel behavior in lower continuous cast mold, so that electric pulsing conditions are advanced optimized, so that continuous casting
Process smoothly efficiently carries out, and easy to operate, experimental cost is low, is a kind of lower continuous casting knot of ideal type laboratory research electric pulse effect
Solidification of molten steel Behavior modeling research device in brilliant device.
Detailed description of the invention
Fig. 1 is the device of the invention overall structure diagram；
Fig. 2 is that electric pulse power parameter regulates and controls interface schematic diagram in the present invention；
Wherein: 1- base；2- induction furnace；3- pulse output electrode；4- pulsed electrode mobile device；The 5- pulse power；6-
Data collection system；7- throwing device；8- crystallizer；9- keeper electrode；10- throwing motor；11- vibrating motor；12- downlink electrical
Machine；13- positioning motor；14- cooling system；15- pulse output lead；16- lift bracket.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Referring to Fig. 1 and Fig. 2, electric pulse acts on lower steel liquid solidification simulator in continuous casting crystallizer, including base 1, induction
Furnace 2, electronic pulse system, data collection system 6, throwing device 7, crystallizer 8, keeper electrode 9, throwing motor 10, vibrating motor 11,
Positioning motor 13, base 1 are equipped with the first screw rod and second that two one end are connect perpendicular to the base plane other end with top plate
Screw rod is equipped with the downlink motor 12 of the first screw rod of driving and the movement of the second screw rod, in the first screw rod and the second screw rod on top plate
It is equipped with and drives vertically moving lift bracket 16 by the first screw rod and the second screw rod；Induction furnace 2 is set on base 1
Between the first screw rod and the second screw rod, throwing motor 10 and vibrating motor 11 are all set on lift bracket 16；Crystallizer 8
Interior to be equipped with thermocouple and cooling system 14 and vertically vibrated by the driving of vibrating motor 11, throwing device 7 is set to crystallization
The bottom end of device 8 is simultaneously pulled downward on by the driving of throwing motor 10；Positioning motor 13 is set on top plate and drives in keeper electrode 9
Lower movement；Electronic pulse system includes the pulse power 5, two pulses for being electrically connected with the pulse power 5 and being oppositely arranged vertically output electricity
Pole 3 and pulsed electrode mobile device 4, pulsed electrode mobile device 4 are set on base 1, and two pulse output electrodes 3 are set to arteries and veins
Rush on electrode movement device 4 and can by pulsed electrode mobile device 4 to its spacing, be inserted into molten bath depth and with crystallizer heat
The relative position in face is adjusted, and data collection system 6 is electrically connected with thermocouple, the pulse power 5 and pulsed electrode mobile device 4
It connects.
When crystallizer sinks to induction furnace straight down, two pulse output electrodes 3 are located at the two sides of crystallizer 8.Crystallizer is adopted
With copper mold crystallizer.
In the present embodiment, the intermediate frequency furnace that induction furnace 2 is high using thermal power, heating rate is fast utilizes intermediate frequency furnace
Bloom is melted to liquidus curve temperatures above.
In the present embodiment, the pulse parameter of the pulse power includes crest voltage, pulse pattern, pulse width and frequency, is led to
The control cabinet being electrically connected with the pulse power is crossed to adjust.
In the present embodiment, pulse output electrode good, high temperature resistant and the material not reacted with covering slag preparation by electric conductivity
It forms, diameter 5mm-15mm.
In the present embodiment, the pulse power 5 is electrically connected by pulse output lead 15 with two pulse output electrodes 3, middle arteries
The copper cable low using resistance of output lead 15 is rushed, specification is >=50mm2.
In the present embodiment, it is 30V that the pulse power 5, which exports crest voltage, and output frequency 100Hz, pulse width is 100 μ
s。
In the present embodiment, 5 output waveform of the pulse power is rectangular wave, and output type is positive pulse, interval pulse or counting
Pulse.
In the present embodiment, pulse output electrode 3 should by electric conductivity good, high temperature resistant and the graphite material not reacted with molten steel
It is prepared, the plane of two pulse output electrodes 3 composition and the angle in the hot face of crystallizer are 180 °, width 20cm, and depth is
10cm。
Working principle of the present invention is as follows:
Induction furnace 2 is set into heating parameters, startup power supply is begun to warm up.Reach the preset degree of superheat to temperature in molten bath
When, a certain amount of decarburization covering slag is added in molten steel surface, and covering slag is made to be heated to melt, it is uniform to solution composition in molten bath
And stablize.Pulse output electrode 3 is connected with pulse output lead 15, pulse output electrode 3 is inserted into a positioning in induction furnace 2
It sets, wherein the plane of two electrodes composition and the angle in the hot face of crystallizer are 180 °, width 20cm, depth 10cm；Starting is set
Having set pulse pattern is the ginseng such as positive pulse and interval pulse, crest voltage 30V, pulse frequency 100Hz, 100 μ s of pulse width
Several pulse powers, pulse application time are set as 15 minutes.Then starting positioning motor 13 drives keeper electrode 9 to move downward
Covering slag liquid level position in crucible is demarcated, computer stores information and sends operating instruction to copper mold crystallizer vibrating system motor,
Copper mold crystallizer with amplitude is 3mm, vibration frequency is moved for the vibration parameters of 100cpm, and copper mold crystallizer enters molten bath
It is interior, so that crystallizer 8 is proposed from molten bath, stops temperature and adopts after molten steel is frozen into certain thickness green shell above the crystallizer
Collection.By crystallizer surface temperature and hot-fluid under the conditions of the different pulse parameters of temperature data substitution formula calculating of acquisition, to green shell
Complete green shell is removed from the hot face of crystallizer after cooling, to do subsequent analysis, experiment terminates.After experiment, calculating can be passed through
The parameters such as temperature out and heat flow data, steel shell cross-sectional morphology, shell thickness study different electric pulsing conditions to molten steel, knot
The influence of Heat transfer, casting blank solidification tissue, green shell pattern etc. between brilliant device, these conditions include electric pulse electrode material, electrode
Position includes angle, width, the depth of electrode Yu the hot face of crystallizer, and power parameter includes output crest voltage, output electric current (peak
Value), output frequency, pulse width, pulse peak power.
Claims (8)
1. a kind of electric pulse acts on lower steel liquid solidification simulator in continuous casting crystallizer, including including base, induction furnace, electric pulse
System, data collection system, throwing device, crystallizer, keeper electrode, throwing motor, vibrating motor, positioning motor, feature exist
In: the base is equipped with the first screw rod and the second screw rod that two one end are connect perpendicular to the base plane other end with top plate,
The downlink motor for driving first screw rod and the movement of the second screw rod is equipped on the top plate, in first screw rod and second
Screw rod, which is equipped with, drives vertically moving lift bracket by the first screw rod and the second screw rod；The induction furnace is set to institute
It states on base between the first screw rod and the second screw rod, the throwing motor and vibrating motor are all set in the lift bracket
On；It is equipped with thermocouple and cooling system in the crystallizer and is vertically vibrated by the driven by vibrating motors, it is described
Throwing device is set to the bottom end of the crystallizer and is pulled downward on by the throwing motor driven；The positioning motor is set to
On the top plate and the keeper electrode is driven to move up and down；The electronic pulse system includes the pulse power and pulse electricity
Two pulse output electrodes and pulsed electrode mobile device that source is electrically connected and is oppositely arranged vertically, the pulsed electrode mobile device
It is set on the base, two pulse output electrode is set in the pulsed electrode mobile device and can be by the arteries and veins
It rushes electrode movement device to be adjusted to the depth of its spacing, insertion molten bath and with the relative position in the hot face of crystallizer, the number
It is electrically connected according to acquisition system with the thermocouple, the pulse power and pulsed electrode mobile device；
The pulse power output crest voltage is 0-36V, and output electric current is 0-5000A；Output frequency is 1-100Hz；Pulse
Width is 1 μ s-150 μ s.
2. electric pulse according to claim 1 acts on lower steel liquid solidification simulator in continuous casting crystallizer, it is characterised in that:
When the crystallizer sinks to induction furnace straight down, two pulse output electrode is located at the two sides of the crystallizer.
3. electric pulse according to claim 1 acts on lower steel liquid solidification simulator in continuous casting crystallizer, it is characterised in that:
The induction furnace is the intermediate frequency furnace that thermal power is high, heating rate is fast.
4. electric pulse according to claim 1 acts on lower steel liquid solidification simulator in continuous casting crystallizer, it is characterised in that:
The pulse parameter of the pulse power includes crest voltage, pulse pattern, pulse width and frequency, passes through what is be electrically connected with the pulse power
Control cabinet is adjusted.
5. electric pulse according to claim 1 acts on lower steel liquid solidification simulator in continuous casting crystallizer, it is characterised in that:
Pulse output electrode good, high temperature resistant and material not reacted with covering slag is prepared, diameter 5mm-15mm by electric conductivity.
6. electric pulse according to claim 1 acts on lower steel liquid solidification simulator in continuous casting crystallizer, it is characterised in that:
The pulse power is electrically connected by pulse output lead with two pulse output electrode, wherein the pulse output lead is adopted
With the low copper cable of resistance, specification is >=50mm2。
7. electric pulse according to claim 1 acts on lower steel liquid solidification simulator in continuous casting crystallizer, it is characterised in that:
Pulse power output waveform is rectangular wave, and output type is positive pulse, interval pulse or counting pulse.
8. electric pulse according to claim 1 acts on lower steel liquid solidification simulator in continuous casting crystallizer, it is characterised in that:
The plane of two pulse output electrodes composition and the angle in the hot face of crystallizer are between 0 ° -180 °；The width of two pulse output electrodes
Between 5cm-30cm；The depth in molten bath is inserted between 2cm-30cm.
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| CN201710930311.1A CN107716887B (en) | 2017-10-09 | 2017-10-09 | A kind of lower steel liquid solidification simulator in continuous casting crystallizer of electric pulse effect |
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| CN201710930311.1A CN107716887B (en) | 2017-10-09 | 2017-10-09 | A kind of lower steel liquid solidification simulator in continuous casting crystallizer of electric pulse effect |
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| CN107716887B true CN107716887B (en) | 2019-12-03 |
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| CN110076309B (en) * | 2019-06-13 | 2020-06-30 | 中南大学 | Electric pulse device and method for locally regulating and controlling phase state distribution of covering slag in slag channel of continuous casting crystallizer |
| CN117548636A (en) * | 2024-01-11 | 2024-02-13 | 中北大学 | Method for treating metal liquid by electric pulse in continuous solidification process |
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| JPH0215852A (en) * | 1988-07-04 | 1990-01-19 | Nkk Corp | Method for continuously casting steel |
| JP3107183B2 (en) * | 1993-12-27 | 2000-11-06 | 株式会社ニレコ | Method and apparatus for measuring displacement of molten metal |
| CN101358280B (en) * | 2008-09-26 | 2010-10-27 | 西安建筑科技大学 | Method for improving carbon steel solidification structure using high voltage electropulse |
| CN102078948B (en) * | 2011-01-28 | 2012-10-03 | 河北文丰钢铁有限公司 | Continuous casting pouring device for electrical pulse inoculation |
| CN102357650B (en) * | 2011-09-28 | 2013-04-17 | 中南大学 | Steel liquid solidification simulator in continuous casting crystallizer |
| CN105033213B (en) * | 2015-07-22 | 2017-03-22 | 中南大学 | Simulating device for casting blanks in continuous casting chamfering crystallizer and application of simulating device |
| CN106041008B (en) * | 2016-07-07 | 2018-05-01 | 中南大学 | A kind of continuous cast mold adjacent corner molten steel initial solidification simulator and method |
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