CN110106309A - A kind of bottomless electrode plasma ladle furnace of multiloop direct current - Google Patents
A kind of bottomless electrode plasma ladle furnace of multiloop direct current Download PDFInfo
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- CN110106309A CN110106309A CN201910261709.XA CN201910261709A CN110106309A CN 110106309 A CN110106309 A CN 110106309A CN 201910261709 A CN201910261709 A CN 201910261709A CN 110106309 A CN110106309 A CN 110106309A
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- Prior art keywords
- ladle
- electrode
- direct current
- furnace
- plasma
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The present invention discloses a kind of bottomless electrode plasma ladle furnace of multiloop direct current characterized by comprising control cabinet；Station；Rectifier, is connected to the control cabinet and can be by AC conversion at direct current；Transformer is connected to alternating current power transmission and the rectifier and can carry out decompression isolation processing to high-voltage electricity；Ladle constitutes high-temperature resistant container with access molten steel；Buggy ladle；Argon gas bottom blowing channel；Electrode group, including the anode and cathode being arranged in the ladle；Electrode holde；Dust-extraction unit is arranged in flue gas and dust of the top of the ladle for generating in process of production to ladle furnace and focuses on.The present invention is not necessarily to hearth electrode or lateral electrode, can save the cost of ladle furnace in production.
Description
Technical field
The present invention relates to ladle furnace technical fields, and in particular to a kind of bottomless electrode plasma ladle furnace of multiloop direct current.
Background technique
Ladle furnace and can be adjusted for refining to first furnace (electric arc furnaces, open hearth, converter) institute melting molten steel
Molten steel temperature and ingredient can play technique buffer function between first furnace (electric arc furnaces, open hearth, converter) and continuous casting installation for casting,
It can satisfy the important metallurgical equipment of continuous casting, tandem rolling condition.
Main function of the ladle furnace in metallurgical production is as follows:
1, heating is carried out to molten steel ladle and realizes heat preservation and heating；
2, technique buffer function is played to first furnace (electric arc furnaces, open hearth, converter) and continuous casting continuous rolling equipment；
3, by the way that addition alloy and slag charge in ladle may be implemented to keep field trash abundant the adjusting of molten steel component in wrapping
It floats so as to improve the quality of molten steel；
4, by the argon gas bottom-blowing device in ladle bottom, the stirring action of molten steel may be implemented；
5, after ladle being hung in vacuum tank, vacuum outgas can be carried out to molten steel using steam jet pump.
Currently, Chinese ladle furnace refining furnace generally uses 3 phases to exchange ladle refining furnace, still, the pole heart circles of 3 electrodes compared with
Greatly, in addition the inclined arc effect of 3 phase electric arcs inherently, keeps electric arc closer away from containment wall, ladle life reduces, while there is also electrodes to disappear
Consumption is big, and power consumption is high, and noise is big, big equal shortcomings is impacted to power grid, if can disappear using DC ladle furnace heated by electrodes
Except these defects.With the development of power electronics technology, power rectifier diode and silicon-controlled price are lower and lower, and power is got over
Come bigger, performance is higher and higher, and direct current electric arc furnace was developed with direct current steel ladle refiner in recent years.
Instantly, in the DC ladle furnace of China operation, direct current single electrode ladle furnace system, direct current list are substantially
Electrode ladle furnace is required to that the closed circuit of direct current power system, refurn electrode could be formed using return pole (usually anode)
Generally using in such a way that bottom of furnace body builds conductive brick and side builds graphite brick or steel plate, furthermore must have more bulky
Cable is connected, adds many troubles to the masonry of operation and ladle.
For the above various shortcoming of the prior art, and the advantage of heating plasma technology is combined, the present invention provides one
The kind bottomless electrode plasma ladle furnace of multiloop direct current.
Summary of the invention
The present invention provides the bottomless electrode plasma ladle furnace of multiloop direct current, and the plasma ladle furnace can save electrode
Consumption and be not necessarily to hearth electrode.
In order to achieve the above objectives, the invention adopts the following technical scheme:
A kind of bottomless electrode plasma ladle furnace of multiloop direct current, comprising:
Control cabinet, for collection site digital quantity and analog quantity and the plasma ladle furnace is carried out automatically controlling；
Station, is connected to the control cabinet, and the station is equipped with on-off switch, automatic start-stop button, emergency stop
Button, indicator light and the computer for data record and statistics filing；
Rectifier, is connected to the control cabinet and can be by AC conversion at direct current, wherein the rectifier uses
Multi-pulse rectification system；
Transformer is connected to alternating current power transmission and the rectifier and can carry out decompression isolation processing to high-voltage electricity；
Ladle constitutes high-temperature resistant container with access molten steel；
Buggy ladle, the setting that the ladle can topple over is on the buggy ladle, for transporting the ladle；
Argon gas bottom blowing channel is connected to the bottom end of the ladle to inject argon gas in the ladle；
Electrode group, including the anode and cathode being arranged in the ladle, the anode and the cathode pass through direct current
Short net is connected to the rectifier, wherein several electrode groups are provided in the ladle；
Electrode holde, the electrode holde include the first electricity gone up and down in the ladle for controlling the anode
Electrode holder and the second electrode holder gone up and down in the ladle for controlling the cathode, the number of the electrode holde
It measures identical as the quantity of the electrode group；
Flue gas and dust that the top of the ladle is used to generate ladle furnace in process of production is arranged in dust-extraction unit
It is focused on.
Further, it is provided with bell on the ladle, offers feed opening on the bell.
Further, the anode and the cathode are graphite electrode, and the graphite electrode is equipped with for being passed through argon gas
Through-hole.
Further, the temperature measuring equipment for measuring molten steel temperature, the temperature measuring equipment connection are additionally provided in the ladle
In the control cabinet.
Further, the internal layer of the ladle has sticked furnace lining layer, and the furnace lining layer build using magnesia carbon brick.
Further, the plasma ladle furnace further includes reactor, and the reactor is connected to the rectifier and institute
It states between anode to carry out flat wave processing to direct current.
Further, the electrode holde is driven by hydraulic station.
Further, the plasma ladle furnace further includes aqueous vapor control cabinet, and the aqueous vapor control cabinet is connected to the behaviour
Make platform and the control cabinet, the aqueous vapor control cabinet is equipped with water lines and air pipe, and the water lines are respectively communicated in the change
To carry out cooling operations, the air pipe is respectively communicated in the argon gas bottom blowing for depressor, the electrode holde and the bell
The through-hole of channel and the graphite electrode is to be passed through argon gas.
Further, by exchanging short net connection between the transformer and the rectifier.
Further, the electrode group rounded array in the ladle is laid.
Compared with prior art, superior effect of the invention is:
1, plasma ladle furnace of the present invention, passes through control cabinet, station, rectifier, transformer, furnace body, anode, yin
Pole and short net are equipped with, and DC loop can be formed in conjunction with furnace liquid, to omit hearth electrode or lateral electrode；
2, plasma ladle furnace of the present invention is set by the cooperation in argon gas bottom blowing channel, electrode group and aqueous vapor control cabinet
It sets, it is effective to enhance plasma ability；
3, plasma ladle furnace of the present invention being capable of effective rectifier, transformer and electricity by the setting of water lines
Anti- device cools down.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of plasma ladle furnace in the present invention；
Fig. 2 is the schematic diagram that electrode group is arranged in plasma ladle furnace of the present invention.
Detailed description of the invention is as follows:
1- control cabinet, 2- station, 3- rectifier, 4- transformer, 5- ladle, 51- bell, 52- feed opening, 53- thermometric
Device, 54- furnace lining layer, 6- buggy ladle, 7- argon gas bottom blowing channel, 8- electrode group, 81- anode, 82- cathode, the short net of 9- direct current,
10- electrode holde, 101- first electrode holder, 102- second electrode holder, 11- dust-extraction unit, 12- reactor, 13-
Aqueous vapor control cabinet, 131- water lines, 132- air pipe, 14- exchange short net, 15- hydraulic station.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail, it should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
Embodiment 1
As shown in Figure 1, the plasma ladle furnace, comprising:
Control cabinet 1, for collection site digital quantity and analog quantity and the plasma ladle furnace is carried out automatically controlling；
Station 2, is connected to the control cabinet 1, and the station 2 is equipped with on-off switch, automatic start-stop button, urgency
Stop button, indicator light and the computer for data record and statistics filing；
Rectifier 3, is connected to the control cabinet 1 and can be by AC conversion at direct current, wherein the rectifier 3
Using multi-pulse rectification system；
Transformer 4 is connected to alternating current power transmission and the rectifier 3 and can carry out decompression isolation processing to high-voltage electricity；
Ladle 5 constitutes high-temperature resistant container with access molten steel, holds before open hearth, electric furnace or converter for steel mill, Foundry Works
Molten steel is connect to carry out pouring practice；
Buggy ladle 6, the setting that the ladle 5 can topple over is on the buggy ladle 6, for transporting the ladle 5
It is defeated；
Argon gas bottom blowing channel 7 is connected to the bottom end of the ladle 5, argon gas is injected in the ladle 5；
Electrode group 8, including the anode 81 and cathode 82 being arranged in the ladle 5, the anode 81 and the cathode 82
The rectifier 3 is connected to by the short net 9 of direct current, wherein be provided with several electrode groups in the ladle 5；
Electrode holde 10, the electrode holde 10 include going up and down in the ladle 5 for controlling the anode 81
First electrode holder 101 and the second electrode holder 102 that is gone up and down in the ladle 5 for controlling the cathode 82,
The quantity of the electrode holde 10 is identical as the quantity of the electrode group 8；
The top of the ladle 5 is arranged in dust-extraction unit 11, flue gas for being generated in process of production to ladle furnace and
Dust is focused on.
Wherein, argon gas bottom blowing channel 7 is directly built by air brick in ladle furnace furnace bottom, is controlled by aqueous vapor control cabinet
The intake of gas source and it is passed through pressure.
In the present embodiment, the gas source for being passed through argon gas bottom blowing channel 7 can also be nitrogen or the gaseous mixture of nitrogen and argon gas.
In actual production process, by argon gas molten steel in ladle 5 can be made to be sufficiently stirred, and accelerate inclusion floating.
The dust-extraction unit 11 includes cleaning shaft, bag filter, the spray scrubber being sequentially communicated, the dust removing tube
Road is equipped with water cooling smoke cooling device, and the water cooling smoke cooling device carries out water circulation, the water of the water pump by water pump
Cooled down by cooling tower.
It is provided with bell 51 on the ladle 5, feed opening 52 is offered on the bell 51, the bell 51 can cooperate
Access molten steel is used in the opening of the opening of the ladle 5, the ladle 5.
In actual production operation, can according to continuous casting demand, to added in molten steel different alloying component and
Slag charge is added by the feed opening 52.
The anode 81 and the cathode 82 are graphite electrode, and the graphite electrode is equipped with for being passed through the logical of argon gas
Hole.
In the present embodiment by the electric current between the anode 81 and the cathode 82 by argon gas, gas can ionize shape
At plasma, (5000~20000 DEG C) of plasma arc temperature are higher than conventional arc temperature, according to principle of heating, heating object
The temperature difference between heat source is bigger, and heating speed is faster, and heating efficiency is also higher, therefore plasma heating adds than conventional arc
The thermal efficiency wants high.
In the present embodiment, the buggy ladle 6 is a kind of railcar for being able to bear high-temperature material, buggy ladle 6 it is main
Effect is exactly to be transported to or leave operating position for ladle 5 by the operation of steady safety.
Since the anode 81 and the cathode 82 are all made of hollow graphite electrode, and in the hollow space of graphite electrode
Being loaded into gas can play the role of increasing ionization raising plasma density temperature electric arc.
The temperature measuring equipment 53 for measuring molten steel temperature is additionally provided in the ladle 5, the temperature measuring equipment 53 is connected to institute
State control cabinet 1, the temperature measuring equipment 53 can be arranged it is multiple, to measure the temperature of multiple points in ladle 5.
Wherein, the actual measurement temperature data in ladle is transferred to by the temperature measuring equipment 53 using infrared continuous temperature measurement instrument
Control cabinet 1.
The internal layer of the ladle 5 has sticked furnace lining layer 54, and the furnace lining layer 54 build using magnesia carbon brick.
In the present embodiment, the ladle 5 is additionally provided with the slag blanket (not shown) swum in above molten steel, and slag blanket is according to smelting
Sweetening process difference uses different types of slag charge；Slag blanket can play the role of remove molten steel in nuisance, while also act as every
Exhausted air, the effect of heat preservation.
The plasma ladle furnace further includes reactor 12, and the reactor 12 is connected to the rectifier 3 and the sun
To carry out flat wave processing to direct current between pole 81.
The effect of reactor 12 is to carry out flat wave to direct current system, keeps the waveform of direct current smoother, while in graphite electricity
It can inhibit current-rising-rate when the extremely short road starting the arc.
The first electrode holder 101 and the second electrode holder 102 are driven by hydraulic station 15, institute
Hydraulic station 15 is stated to be controlled by the control cabinet 1.The electrode holde 10 is by being promoted and decline, to the anode 81 and described
The distance between cathode 82 is adjusted, to reach optimal work arc length.
As another embodiment, the first electrode holder 101 and the second electrode holder 102 can
The anode 81 and the cathode 82 is driven to go up and down by way of linear motor.
The plasma ladle furnace further includes aqueous vapor control cabinet 13, and the aqueous vapor control cabinet 13 is connected to the station 2
With the control cabinet 1, the aqueous vapor control cabinet 13 is equipped with water lines 131 and air pipe 132, and the water lines 131 are respectively communicated with
In the transformer 4, the electrode holde 10 and the bell 51 to carry out cooling operations, the air pipe 132 connects respectively
The through-hole of argon gas bottom blowing channel 7 and the graphite electrode is passed through to be passed through argon gas, the aqueous vapor control cabinet 13 is also equipped with report
Alert function, can be monitored water temperature hydraulic pressure water flow, alarm after monitoring fault message；Plasma can also be monitored
The flow of gas when underfed, sounds an alarm；And the flow of argon gas bottom blowing can be controlled.
It is connected between the transformer 4 and the rectifier 3 by the short net 14 of exchange.
As shown in Fig. 2, the electrode group 8 rounded array in the ladle 5 is laid.In the present embodiment, described
Distribution of the electrode group 8 in the ladle 5 answers relatively uniform arrangement uniform in favor of heating effect.
The present invention is not limited to the above embodiments, and the above embodiments and description only describe of the invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these change and change
Into all fall within the protetion scope of the claimed invention.The claimed scope of the invention is defined by the following claims.
Claims (10)
1. a kind of bottomless electrode plasma ladle furnace of multiloop direct current characterized by comprising
Control cabinet, for collection site digital quantity and analog quantity and the plasma ladle furnace is carried out automatically controlling；
Station, is connected to the control cabinet, the station be equipped with on-off switch, automatic start-stop button, scram button,
Indicator light and the computer filed for data record and statistics；
Rectifier, is connected to the control cabinet and can be by AC conversion at direct current, wherein the rectifier uses more arteries and veins
Wave commutation system；
Transformer is connected to alternating current power transmission and the rectifier and can carry out decompression isolation processing to high-voltage electricity；
Ladle constitutes high-temperature resistant container with access molten steel；
Buggy ladle, the setting that the ladle can topple over is on the buggy ladle, for transporting the ladle；
Argon gas bottom blowing channel is connected to the bottom end of the ladle to inject argon gas in the ladle；
Electrode group, including the anode and cathode being arranged in the ladle, the anode and the cathode pass through the short net of direct current
It is connected to the rectifier, wherein several electrode groups are provided in the ladle；
Electrode holde, the electrode holde include the first electrode handle gone up and down in the ladle for controlling the anode
Holder and the second electrode holder gone up and down in the ladle for controlling the cathode, the quantity of the electrode holde with
The quantity of the electrode group is identical；
Flue gas and dust progress that the top of the ladle is used to generate ladle furnace in process of production is arranged in dust-extraction unit
Centralized processing.
2. the bottomless electrode plasma ladle furnace of multiloop direct current according to claim 1, which is characterized in that on the ladle
It is provided with bell, offers feed opening on the bell.
3. the bottomless electrode plasma ladle furnace of multiloop direct current according to claim 2, which is characterized in that the anode and
The cathode is graphite electrode, and the graphite electrode is equipped with the through-hole for being passed through argon gas.
4. the bottomless electrode plasma ladle furnace of multiloop direct current according to claim 1, which is characterized in that in the ladle
It is additionally provided with the temperature measuring equipment for measuring molten steel temperature, the temperature measuring equipment is connected to the control cabinet.
5. the bottomless electrode plasma ladle furnace of multiloop direct current according to claim 1, which is characterized in that the ladle
Internal layer has sticked furnace lining layer, and the furnace lining layer build using magnesia carbon brick.
6. the bottomless electrode plasma ladle furnace of multiloop direct current according to claim 1, which is characterized in that the plasma
Ladle furnace further includes reactor, and the reactor is connected between the rectifier and the anode to carry out flat wave to direct current
Processing.
7. the bottomless electrode plasma ladle furnace of multiloop direct current according to claim 1, which is characterized in that the electrode handle
Holder is driven by hydraulic station.
8. the bottomless electrode plasma ladle furnace of multiloop direct current according to claim 3, which is characterized in that the plasma
Ladle furnace further includes aqueous vapor control cabinet, and the aqueous vapor control cabinet is connected to the station and the control cabinet, the aqueous vapor control
Cabinet processed is equipped with water lines and air pipe, and the water lines are respectively communicated in the transformer, the electrode holde and the furnace
To carry out cooling operations, the air pipe is respectively communicated in the through-hole of argon gas bottom blowing channel and the graphite electrode with logical lid
Enter argon gas.
9. the bottomless electrode plasma ladle furnace of multiloop direct current according to claim 1, which is characterized in that the transformer
By exchanging short net connection between the rectifier.
10. the bottomless electrode plasma ladle furnace of multiloop direct current according to claim 1, which is characterized in that the electrode
Group rounded array in the ladle is laid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910261709.XA CN110106309A (en) | 2019-04-02 | 2019-04-02 | A kind of bottomless electrode plasma ladle furnace of multiloop direct current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910261709.XA CN110106309A (en) | 2019-04-02 | 2019-04-02 | A kind of bottomless electrode plasma ladle furnace of multiloop direct current |
Publications (1)
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|---|---|
| CN110106309A true CN110106309A (en) | 2019-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910261709.XA Pending CN110106309A (en) | 2019-04-02 | 2019-04-02 | A kind of bottomless electrode plasma ladle furnace of multiloop direct current |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523966A (en) * | 2019-09-25 | 2019-12-03 | 张家港广大特材股份有限公司 | A kind of double porous cores of ladle |
| CN114449723A (en) * | 2022-04-08 | 2022-05-06 | 北京奥邦新材料有限公司 | Device and method for improving power factor of tundish plasma heating system |
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| JP3010600B2 (en) * | 1991-03-02 | 2000-02-21 | 大同特殊鋼株式会社 | DC arc melting equipment |
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| CN202369607U (en) * | 2011-12-05 | 2012-08-08 | 鞍山创新实业有限公司 | Three-electrode direct current steel ladle refining furnace |
| CN202369602U (en) * | 2011-12-05 | 2012-08-08 | 鞍山创新实业有限公司 | Power supply and control device for steel ladle refining furnace |
| CN106001528A (en) * | 2016-07-13 | 2016-10-12 | 北京麦特尔科技有限公司 | Continuous casting tundish direct-current plasma heating device using a plurality of graphite hollow bars as electrodes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3835230A (en) * | 1972-05-02 | 1974-09-10 | Nipkti Cherna Metalurgia | D.c. arc furnace for steelmaking |
| CN1048750A (en) * | 1989-07-11 | 1991-01-23 | 太原重型机器厂 | Arc controlled magnetic mirror direct current electric arc furnace |
| JP3010600B2 (en) * | 1991-03-02 | 2000-02-21 | 大同特殊鋼株式会社 | DC arc melting equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523966A (en) * | 2019-09-25 | 2019-12-03 | 张家港广大特材股份有限公司 | A kind of double porous cores of ladle |
| CN114449723A (en) * | 2022-04-08 | 2022-05-06 | 北京奥邦新材料有限公司 | Device and method for improving power factor of tundish plasma heating system |
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Application publication date: 20190809 |
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