CN107622726A - Covering slag crystallization and the analogue means and method of Heat transfer in a kind of lower continuous cast mold of electric pulse effect - Google Patents
Covering slag crystallization and the analogue means and method of Heat transfer in a kind of lower continuous cast mold of electric pulse effect Download PDFInfo
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- CN107622726A CN107622726A CN201710931449.3A CN201710931449A CN107622726A CN 107622726 A CN107622726 A CN 107622726A CN 201710931449 A CN201710931449 A CN 201710931449A CN 107622726 A CN107622726 A CN 107622726A
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Abstract
The invention discloses a kind of electric pulse to act on covering slag crystallization and the analogue means and method of Heat transfer in lower continuous cast mold, by simulating covering slag crystallization and Heat transfer under application electric pulsing conditions in continuous cast mold, measure crystallizer surface changes of heat flux curve under the conditions of different pulse parameters, obtain the slag film for meeting casting process under the conditions of actual electric pulse applies, analyze flux film thickness and percent crystallization in massecuite under different impulsive conditions, calculate covering slag, interface resistance between the hot face of crystallizer, realize under laboratory research difference electric pulsing conditions, the influence of crystallization and Heat transfer of the covering slag in crystallizer, more systematic research electric pulse improves covering slag crystallization and Heat transfer mechanism.The present invention has the advantages such as experimental implementation simplicity is controllable, flow is short, efficiency high, experimentation cost are low.
Description
Technical field
The invention belongs to covering slag in continuous casting of iron and steel technical field, more particularly to a kind of lower continuous cast mold of electric pulse effect
Crystallization and the analogue means and method of Heat transfer.
Background technology
Covering slag has highly important effect in continuous casting of iron and steel process, particularly penetrates into crystallizer and initial solidification green shell
Between space covering slag, can play a part of controlling the heat transfer between strand and crystallizer and lubrication green shell.Solidified shell with
Heat transfer between crystallizer consumingly affects the surface quality of strand, and the crystallization of covering slag affects with Heat transfer
Heat transfer between solidified shell and crystallizer.Therefore, with increase of the market to high-quality steel demand, to casting process
In covering slag crystallization and Heat transfer further investigation it is most important.Covering slag crystallization behavior is ground on outfield at present
Studying carefully mainly includes DC electric field and AC field, and existing progress rests on the summary of simple experimental phenomena mostly, lacks
The weary discussion to covering slag Heat transfer.It is rarely reported on crystallization of the electric pulse to covering slag and the research of Heat transfer, electricity
A kind of instantaneous, high-energy electric field of pulse offer, a kind of new technology of the electric pulse as improvement steel product quality and performance study, mainly
Removal of inclusions is concentrated on, thinned steel solidified structure, improves the research of steel machinery performance etc., it is crystallized to covering slag
How is influence with Heat transfer, in blank stage.
The content of the invention
The present invention is provided in a kind of lower continuous cast mold of electric pulse effect for deficiency existing for current technology and device
Covering slag crystallizes the analogue means and method with Heat transfer, for probing into electric pulse to covering slag crystallization and the shadow of solidification behavior
Ring.
In order to solve the above technical problems, in the lower continuous cast mold of electric pulse provided by the present invention effect covering slag crystallization with
The analogue means of Heat transfer, including support, resistance furnace, electronic pulse system, crucible, data collecting system, throwing device, crystallization
Device, keeper electrode, throwing motor, vibrating motor, positioning motor, it is another perpendicular to support plane that the support is provided with two one end
The first screw mandrel and the second screw mandrel that one end is connected with top plate, it is provided with the top plate and drives first screw mandrel and the second screw mandrel
The descending motor of motion, it is provided with first screw mandrel and the second screw mandrel square vertically by the first screw mandrel and the second screw mandrel drives edge
To the shears of motion；The resistance furnace is arranged on the support between the first screw mandrel and the second screw mandrel, the earthenware
Crucible is located in the resistance furnace, and the throwing motor and vibrating motor may be contained within the shears；In the crystallizer
Vertically vibrated provided with thermocouple and cooling system and by the driven by vibrating motors, the throwing device is arranged at described
The bottom of crystallizer is simultaneously pulled downward on by throwing motor driving；The positioning motor is arranged on the top plate and driven
The keeper electrode moves up and down；The electronic pulse system includes the pulse power, electrically connected with the pulse power and vertical phase
To two pulse output electrodes and pulsed electrode mobile device of setting, the pulsed electrode mobile device is arranged at the support
On, two pulse output electrode is arranged at the pulsed electrode mobile device and can be by the pulsed electrode mobile device pair
Its spacing, insert the depth of covering slag in crucible and be adjusted with the relative position in the hot face of crystallizer, the data acquisition system
System electrically connects with the thermocouple, the pulse power and pulsed electrode mobile device.
Further, the resistance furnace is Si-Mo rod resistance furnace.
Further, the hot face outside of the crystallizer is provided with one and is used to after measuring crystallizer immersion molten bath freeze solidly on
The thermocouple of the hot face slag film temperature of crystallizer, the thermocouple in crystallizer is by the first row thermocouple be arrangeding in parallel and second
Heat extraction galvanic couple forms, and distance of the first row thermocouple apart from thermocouple crystallization heat face is 2-4mm, second row thermocouple and first row
The distance of thermocouple is 4-6mm, if the thermocouple vertically uniformly arranged with 2-4mm spacing by the Heavenly Stems and Earthly Branches per heat extraction galvanic couple
Form, distance of the thermocouple of lowermost end apart from crystallizer bottom surface is 15-20mm in every heat extraction galvanic couple.
Further, the pulse parameter of the pulse power includes crest voltage, pulse pattern, pulse width and frequency, passes through
The switch board regulation electrically connected with the pulse power.
Further, pulse output electrode by electric conductivity is good, high temperature resistant and do not prepare with the material of covering slag reaction and
Into a diameter of 5mm-15mm.
Further, the pulse power is electrically connected by pulse output lead with two pulse output electrode, wherein
For the pulse output lead using the low copper cable of resistance, specification is >=50mm2。
Further, pulse power output crest voltage is 0-36V, preferably 30V；Output 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 square wave, and output type is positive pulse, interval pulse or counts 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
For 180 °；The width of two pulse output electrodes is between 5cm-30cm, preferably 20cm；The depth in covering slag is inserted in 2cm-
Between 30cm, preferably 10cm.
It is a kind of to simulate covering slag crystallization and the method for Heat transfer in the lower continuous cast mold of electric pulse effect, including following step
Suddenly：
The first step, slag, resistance furnace is set into the parameters such as heating-up temperature, heating power, startup power supply is begun to warm up, and is treated
When temperature reaches preset value in crucible, toward crucible in add a certain amount of decarburization covering slag, make covering slag be heated to melt；
Second step, apply electric pulse, connect pulse output electrode with pulse output lead, pulse output electrode is inserted
In crucible in resistance furnace；Starting impulse power supply, after being disposed, close power supply, shift out pulse output electrode.
3rd step, start covering slag liquid level position in keeper electrode demarcation crucible, computer storage information is shaken to crystallizer
Dynamic system motor sends operating instruction, and crystallizer is according to default vibration frequency, Oscillation Amplitude, cooling water flow, residence time
Moved Deng vibration parameters, while data collecting system starts thermometric, crystallizer, which enters in crucible, causes covering slag in water cooling
Crystallized above copper mold, when covering slag forms one layer of certain thickness slag film on copper mold surface, crystallizer is from crucible melt cinder
It is proposed, stop temperature acquisition；
4th step, sampling, complete slag film is removed from the hot face of copper mold after the cooling of slag film, so as to slag at copper mold diverse location
Film is sampled, and carries out post analysis and processing；
5th step, Heat transfer analysis and data processing, the temperature data of thermocouple collection is calculated into different pulse parameters
Under the conditions of thermal resistance between crystallizer hot-face temperature and hot-fluid and covering slag, crystallizer interface；
6th step, crystallization behavior analysis and data processing, solid slag layer crystallization thickness and percent crystallization in massecuite, phase are carried out to flux film
The analyses such as state distribution, crystal size and pattern.
Further, pulse is positive pulse in step 2 and interval pulse, pulse power output crest voltage are 0-36V,
Preferably 30V；Output 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, pulse application time 4-6 minutes, preferably 5 minutes.
The present invention provides a kind of electric pulse of simulating and acts on covering slag crystallization and the research of Heat transfer in lower continuous cast mold
Device and method, the present invention apply covering slag crystallization and the Heat transfer under electric pulsing conditions in continuous cast mold by simulation,
Crystallizer surface changes of heat flux curve under the conditions of different pulse parameters is measured, acquisition meets continuous casting under the conditions of actual electric pulse applies
The slag film of process, flux film thickness and percent crystallization in massecuite under different impulsive conditions are analyzed, calculate interface between covering slag, the hot face of crystallizer
Thermal resistance, realize under laboratory research difference electric pulsing conditions, the influence of crystallization and Heat transfer of the covering slag in crystallizer, more
The electric pulse that have studied of adding system improves covering slag crystallization and Heat transfer mechanism, be covering slag crystallization and Heat transfer along
Offer theoretical direction is developed in the direction for being advantageous to continuous casting.The present invention is with experimental implementation simplicity is controllable, flow is short, efficiency
The high, advantage such as experimentation cost is low.
The present invention mainly has the advantages that：
1) equipment is simple, and floor space is small.The present invention includes four systemses, only a small amount of experimenter need to be equipped with, with regard to energy
Experiment is completed in collaboration, the process conditions such as pulse parameter can be regulated and controled, strong operability.With experimental facilities is simple, operation side
Just the features such as.
2) experimental cost is low.The achievable laboratory scale covering slag crystallization of the present invention is studied with Heat transfer, experiment consumption
Few, analysis testing cost is low.
Brief description of the drawings
Fig. 1 is the device overall structure diagram of the present invention；
The thermocouple that Fig. 2 is the present invention arranges schematic diagram；
Fig. 3 is to whether there is temperature profile measured by thermocouple under impulsive condition.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Referring to Fig. 1, covering slag crystallization and the analogue means of Heat transfer in the lower continuous cast mold of electric pulse effect, including machine
Seat 1, resistance furnace 2, electronic pulse system, data collecting system 6, throwing device 7, crystallizer 8, keeper electrode 9, throwing motor 10, shake
Dynamic motor 11, positioning motor 13, support 1 are provided with first that two one end are connected perpendicular to the support plane other end with top plate
Bar and the second screw mandrel, the first screw mandrel of driving and the descending motor 12 of the second screw mandrel motion are provided with top plate, in the first screw mandrel and
Second screw mandrel is provided with drives vertically moving shears 16 by the first screw mandrel and the second screw mandrel；Resistance furnace 2 is set
In between the first screw mandrel and the second screw mandrel, crucible 4 is arranged in the burner hearth of resistance furnace on support 1, throwing motor 10 and shake
Dynamic motor 11 may be contained within shears 16；Thermocouple and cooling system 14 are provided with crystallizer 8 and passes through vibrating motor 11
Driving is vertically vibrated, and throwing device 7 is arranged at the bottom of crystallizer 8 and pulled downward on by the driving of throwing motor 10；It is fixed
Position motor 13 is arranged on top plate and drives keeper electrode 9 to move up and down；Electronic pulse system includes the pulse power 5 and pulse electricity
Two pulse output electrodes 3 and pulsed electrode mobile device 17 that source 5 electrically connects and is oppositely arranged vertically, pulsed electrode mobile device
17 are arranged on support 1, and two pulse output electrodes 3 are arranged in pulsed electrode mobile device 17 and can moved by pulsed electrode
Device 17 is adjusted to the depth of covering slag in its spacing, insertion crucible and with the relative position in the hot face of crystallizer, and data are adopted
Collecting system 6 electrically connects with thermocouple, the pulse power 5 and pulsed electrode mobile device 17.
Referring to Fig. 2, in the present embodiment, be also equipped with the hot face outside of crystallizer one be used to measuring crystallizer immerse it is molten
The thermocouple of the hot face slag film temperature of crystallizer is freezed solidly on behind pond, the thermocouple in crystallizer is by the first heat extraction for be arrangeding in parallel
Galvanic couple and second row thermocouple composition, distance of the first row thermocouple apart from thermocouple crystallization heat face is 3mm, second row thermocouple
Distance with first row thermocouple is 5mm, if the heat vertically uniformly arranged with 3mm spacing by the Heavenly Stems and Earthly Branches per heat extraction galvanic couple
Galvanic couple forms, and distance of the thermocouple of lowermost end apart from crystallizer bottom surface is 18mm in every heat extraction galvanic couple.
When crystallizer 8 sinks to resistance furnace 2 straight down, two pulse output electrodes 3 are located at the both sides of crystallizer 8.Crystallizer 8
Using copper mold crystallizer.
In the present embodiment, resistance furnace 2 utilizes intermediate frequency resistance furnace using the intermediate frequency resistance furnace that thermal power is high, programming rate is fast
Bloom is melted to liquidus curve temperatures above.
In the present embodiment, the pulse parameter of the pulse power 5 includes crest voltage, pulse pattern, pulse width and frequency, leads to
Cross the switch board regulation electrically connected with the pulse power.
In the present embodiment, pulse output electrode 3 is by electric conductivity is good, prepared by high temperature resistant and the material that is not reacted with covering slag
Form, a diameter of 5mm-15mm.
In the present embodiment, the pulse power 5 is electrically connected by pulse output lead 15 with two pulse output electrodes 3, its middle arteries
Output lead 15 is rushed using the low copper cable of resistance, 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, pulse power output waveform is square wave, and output type is positive pulse, interval pulse or counts arteries and veins
Punching.
In the present embodiment, pulse output electrode 3 should by electric conductivity good, high temperature resistant and the not graphite material with molten steel reaction
It is prepared, the plane and the angle in the hot face of crystallizer of two electrodes composition are 180 °, width 20cm, depth 10cm.
It is a kind of to simulate covering slag crystallization and the research method of Heat transfer in the lower continuous cast mold of electric pulse effect, including such as
Lower step：
The first step, slag, resistance furnace 2 being set into the parameters such as heating-up temperature, heating power, startup power supply is begun to warm up,
When temperature reaches preset value in crucible 4, toward crucible in add 4kg decarburization covering slag, make covering slag be heated to melt.
Second step, apply electric pulse, pulse output electrode 3 is connected with pulse output lead 15, by pulse output electrode 3
Insert in the crucible 4 in resistance furnace 2, now the plane of two pulse output electrodes 3 composition and the angle in the hot face of crystallizer are 180 °,
Width is 20cm, and the depth for inserting molten bath is 10cm；Start the pulse power for setting pulse parameter, pulse application time is set
For 5 minutes, it is disposed, closes power supply, shift out pulse electrode.
3rd step, operating chill thermal simulation system, start keeper electrode 9 and demarcate covering slag liquid level position in crucible 2, meter
Calculation machine storage information sends operating instruction to copper mold crystallizer vibrating system motor, and copper mold crystallizer is according to default vibration frequency
The vibration parameters such as rate, Oscillation Amplitude, cooling water flow, residence time are moved, while data collecting system 6 starts thermometric,
Copper mold crystallizer, which enters in crucible 4, causes covering slag to be crystallized on water cooled copper mould, when covering slag is formed on copper mold surface
During one layer of certain thickness slag film, copper mold crystallizer proposes from the melt cinder of crucible 4, stops temperature acquisition.
4th step, sampling, complete slag film is removed from the hot face of copper mold after the cooling of slag film, so as to slag at copper mold diverse location
Film is sampled, and carries out post analysis and processing.
5th step, Heat transfer analysis and data processing, the temperature data of thermocouple collection is calculated into different pulse parameters
Under the conditions of thermal resistance between crystallizer hot-face temperature and hot-fluid and covering slag, crystallizer interface.
6th step, crystallization behavior analysis and data processing, solid slag layer crystallization thickness and percent crystallization in massecuite, phase are carried out to flux film
The analysis of state distribution, crystal size and pattern etc..
Fig. 3 is to whether there is temperature profile measured by thermocouple under impulsive condition, wherein, 3 represent 3mm positions under liquid levels in Fig. 2
Place is put, N represents no pulse, and P indicates pulse, and F represents to represent away from the hot face of copper mold close to the hot face of copper mold, D.The present invention passes through mould
Intend applying the covering slag crystallization under electric pulsing conditions in continuous cast mold and Heat transfer, measure and tie under the conditions of different pulse parameters
Brilliant device surface heat flow change curve, the slag film for meeting casting process under the conditions of actual electric pulse applies is obtained, analyzes different pulses
Under the conditions of flux film thickness and percent crystallization in massecuite, calculate covering slag, interface resistance between the hot face of crystallizer, realize laboratory research difference
Under electric pulsing conditions, the influence of crystallization and Heat transfer of covering slag in crystallizer etc..The present invention has experimental implementation easy
The controllable, advantage such as flow is short, efficiency high, experimentation cost are low.
Claims (10)
1. covering slag crystallization and the analogue means of Heat transfer in a kind of lower continuous cast mold of electric pulse effect, including support, electricity
Hinder stove, electronic pulse system, crucible, data collecting system, throwing device, crystallizer, keeper electrode, throwing motor, vibrating motor, fixed
Position motor, it is characterised in that：The support is provided with first that two one end are connected perpendicular to the support plane other end with top plate
Screw mandrel and the second screw mandrel, the descending motor for driving the first screw mandrel and the second screw mandrel motion is provided with the top plate, in institute
State the first screw mandrel and the second screw mandrel is provided with and drives vertically moving shears by the first screw mandrel and the second screw mandrel；Institute
Resistance furnace to be stated to be arranged on the support between the first screw mandrel and the second screw mandrel, the crucible is located in the resistance furnace,
The throwing motor and vibrating motor may be contained within the shears；Thermocouple and cooling system are provided with the crystallizer
And vertically vibrated by the driven by vibrating motors, the throwing device is arranged at the bottom of the crystallizer and passes through institute
The driving of throwing motor is stated to pull downward on；The positioning motor is arranged on the top plate and drives the keeper electrode to transport up and down
It is dynamic；The two pulses output that the electronic pulse system includes the pulse power, electrically connects with the pulse power and be oppositely arranged vertically
Electrode and pulsed electrode mobile device, the pulsed electrode mobile device are arranged on the support, the two pulses output electricity
Pole is arranged in the pulsed electrode mobile device and can be by the pulsed electrode mobile device in its spacing, insertion crucible
The depth of covering slag and it is adjusted with the relative position in the hot face of crystallizer, the data collecting system and the thermocouple, arteries and veins
Rush power supply and the electrical connection of pulsed electrode mobile device.
2. covering slag crystallization and the simulation of Heat transfer fill in the lower continuous cast mold of electric pulse effect according to claim 1
Put device, it is characterised in that：The resistance furnace is Si-Mo rod resistance furnace.
3. covering slag crystallization and the simulation of Heat transfer fill in the lower continuous cast mold of electric pulse effect according to claim 1
Put device, it is characterised in that：The hot face outside of crystallizer is also equipped with one and is used to after measuring crystallizer immersion molten bath coagulate
Be fixed in the thermocouple of the hot face slag film temperature of crystallizer, the thermocouple in crystallizer by the first row thermocouple that be arranged in parallel and
Second row thermocouple forms, and distance of the first row thermocouple apart from thermocouple crystallization heat face is 2-4mm, second row thermocouple and the
The distance of one heat extraction galvanic couple is 4-6mm, if the heat vertically uniformly arranged with 2-4mm spacing by the Heavenly Stems and Earthly Branches per heat extraction galvanic couple
Galvanic couple forms, and distance of the thermocouple of lowermost end apart from crystallizer bottom surface is 15-20mm in every heat extraction galvanic couple.
4. covering slag crystallization and the simulation of Heat transfer fill in the lower continuous cast mold of electric pulse effect according to claim 1
Put device, it is characterised in that：The pulse parameter of the pulse power includes crest voltage, pulse pattern, pulse width and frequency, passes through
The switch board regulation electrically connected with the pulse power.
5. covering slag crystallization and the simulation of Heat transfer fill in the lower continuous cast mold of electric pulse effect according to claim 1
Put device, it is characterised in that：Pulse output electrode by electric conductivity is good, high temperature resistant and do not prepare with the material of covering slag reaction and
Into a diameter of 5mm-15mm.
6. covering slag crystallization and the simulation of Heat transfer fill in the lower continuous cast mold of electric pulse effect according to claim 1
Put device, it is characterised in that：The pulse power is electrically connected by pulse output lead with two pulse output electrode, wherein
For the pulse output lead using the low copper cable of resistance, specification is >=50mm2。
7. covering slag crystallization and the simulation of Heat transfer fill in the lower continuous cast mold of electric pulse effect according to claim 1
Put device, it is characterised in that：Pulse power output waveform is square wave, and output type is positive pulse, interval pulse or counts arteries and veins
Punching.
8. a kind of simulate covering slag crystallization and the method for Heat transfer in the lower continuous cast mold of electric pulse effect, it is characterised in that：
Usage right requires that the electric pulse described in 1-7 any one acts on covering slag crystallization and the mould of Heat transfer in lower continuous cast mold
Intend device, comprise the following steps：
The first step, slag, resistance furnace is set into the parameters such as heating-up temperature, heating power, startup power supply is begun to warm up, and treats crucible
When interior temperature reaches preset value, toward crucible in add a certain amount of decarburization covering slag, make covering slag be heated to melt；
Second step, apply electric pulse, connect pulse output electrode with pulse output lead, pulse output electrode is inserted into resistance
In crucible in stove；Starting impulse power supply, pulse electric pulse is applied to covering slag, after being disposed, close power supply, shift out pulse
Output electrode；
3rd step, start covering slag liquid level position in keeper electrode demarcation crucible, computer storage information gives mold oscillation system
Motor of uniting sends operating instruction, and crystallizer shakes according to default vibration frequency, Oscillation Amplitude, cooling water flow, residence time etc.
Dynamic parameter is moved, while data collecting system starts thermometric, and crystallizer, which enters in crucible, causes covering slag in water cooled copper mould
Crystallize above, when covering slag forms one layer of certain thickness slag film on copper mold surface, crystallizer proposes from crucible melt cinder,
Stop temperature acquisition；
4th step, sampling, complete slag film is removed from the hot face of copper mold after the cooling of slag film, to enter to slag film at copper mold diverse location
Row sampling, carries out post analysis and processing；
5th step, Heat transfer analysis and data processing, the temperature data of thermocouple collection is calculated into different pulse parameter conditions
Thermal resistance between lower crystallizer hot-face temperature and hot-fluid and covering slag, crystallizer interface；
6th step, crystallization behavior analysis and data processing, solid slag layer crystallization thickness and percent crystallization in massecuite, phase point are carried out to flux film
Cloth, crystal size and pattern etc. are analyzed.
9. covering slag crystallization and the side of Heat transfer in the lower continuous cast mold of simulation electric pulse effect according to claim 8
Method, it is characterised in that：Pulse is positive pulse in step 2 and interval pulse, pulse power output crest voltage are 0-36V, preferably
For 30V；Output 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, pulse application time 4-6 minutes, preferably 5 minutes.
10. covering slag crystallization and the simulation of Heat transfer in the lower continuous cast mold of electric pulse effect according to claim 8
Device device, it is characterised in that：In step 2 the angle in plane and the hot face of crystallizer that two pulse output electrodes form 0 °-
Between 180 °, preferably 180 °；The width of two pulse output electrodes is between 5cm-30cm, preferably 20cm；It is inserted in covering slag
Interior depth is between 2cm-30cm, preferably 10cm.
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| CN108746533A (en) * | 2018-05-08 | 2018-11-06 | 北京科技大学 | A kind of method of pulse current control continuous crystallizer protecting slag crystallinity |
| CN108986629A (en) * | 2018-08-30 | 2018-12-11 | 中南大学 | A kind of Twin-Roll Strip Casting device simulator and its method |
| CN110076309A (en) * | 2019-06-13 | 2019-08-02 | 中南大学 | The electrical pulse device and method of covering slag Phase velocity map in a kind of part regulation continuous cast mold slag road |
| CN111957917A (en) * | 2020-09-17 | 2020-11-20 | 贵州理工学院 | Device and method for obtaining continuous casting mold flux solidified slag film |
| CN115808441A (en) * | 2023-02-08 | 2023-03-17 | 北京科技大学 | Device and method for testing heat transfer performance of metallurgical covering slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20180123 |