CN111811251A - Fence type combined electrode ore smelting furnace and control method thereof - Google Patents
Fence type combined electrode ore smelting furnace and control method thereof Download PDFInfo
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- CN111811251A CN111811251A CN202010549066.1A CN202010549066A CN111811251A CN 111811251 A CN111811251 A CN 111811251A CN 202010549066 A CN202010549066 A CN 202010549066A CN 111811251 A CN111811251 A CN 111811251A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/20—Arrangements of heating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/08—Heating by electric discharge, e.g. arc discharge
- F27D11/10—Disposition of electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a fence type combined electrode submerged arc melting furnace and a control method thereof. The electrode system comprises an upper electrode holder, a lower electrode holder, an electrode copper tile, a middle shaft cathode, a peripheral fence type cathode, a furnace bottom anode, a power supply, a transformer, a motor crawler device, a master control computer and a voltmeter. The furnace body comprises a furnace cover, a furnace shell, a furnace lining, a furnace body support, a water pump and a thermocouple. The electrode system comprises a peripheral fence type cathode electrode arranged so that current can flow through the furnace charge near the side of the furnace lining. Compare in traditional single electrode ore deposit hot smelting furnace, not only the joule heat extreme value reduces in the rail type combined electrode ore deposit hot smelting furnace, and the interior joule heat distribution range of stove has obtained the expansion moreover, has improved the uneven problem of furnace charge heat distribution in the stove effectively, also promotes the utilization efficiency of interior energy of stove and furnace charge melting rate simultaneously, but wide application in metallurgical and chemical industry.
Description
Technical Field
The invention belongs to the field of metallurgical chemical production, and particularly relates to a fence type combined electrode submerged arc melting furnace and a control method thereof.
Background
The ore smelting furnace is used as an important part of industrial production and is widely applied to the smelting process of steel and non-ferrous metals. In recent years, with the development of society and the progress of science and technology, the requirements on energy consumption, productivity and emission of the submerged arc melting furnace are higher and higher, and a novel enhanced heat exchange technology and an optimal design method of the submerged arc melting furnace are continuously applied to the submerged arc melting furnace. In the prior art, most electrodes of a submerged arc melting furnace are cylindrical electrodes, and when the electrodes are inserted into a charging material to perform submerged arc operation, the metal is melted by resistance heat generated when energy and current of electric arcs at the ends of the electrodes flow through the charging material. However, with such an arrangement, the heat in the furnace is intensively distributed at the end part of the electrode, the distribution nonuniformity of the heat in the furnace is very obvious, the heat generated by a large amount of electric energy in the central area of the furnace body is used for the melted furnace charge, and the furnace charge at the edge position such as the furnace wall can only receive the heat through two heat transport modes of heat conduction and natural convection, so that the smelting performance of the submerged arc smelting furnace is seriously weakened. In conclusion, how to effectively improve the problem of uneven heat distribution in the submerged arc melting furnace is a problem which needs to be solved urgently by the technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a fence type combined electrode ore smelting furnace and a control method thereof, wherein the fence type combined electrode ore smelting furnace can reduce the extreme value of joule heat in the furnace, enlarge the distribution range of the joule heat in the furnace, effectively solve the problem of uneven distribution of heat of furnace charge in the furnace, and simultaneously improve the utilization efficiency of energy in the furnace and the melting rate of the furnace charge.
In order to achieve the above object, the fence type combined electrode ore smelting furnace of the present invention comprises: the electrode system comprises an electrode system and a furnace body system, wherein the electrode system comprises a first motor crawler device and a second motor crawler device which are connected with a master control computer, an upper electrode holder and a lower electrode holder are respectively fixed on the first motor crawler device and the second motor crawler device, the upper electrode holder and the lower electrode holder respectively clamp a center shaft cathode electrode and a peripheral fence cathode electrode through electrode copper tiles, the peripheral fence cathode electrode consists of a main electrode ring and a plurality of cylindrical sub-cathode electrodes, the center shaft cathode electrode penetrates through the main electrode ring of the peripheral fence cathode electrode, the furnace body is arranged at the lower ends of the center shaft cathode electrode and the peripheral fence cathode electrode, the center shaft cathode electrode and the peripheral fence cathode electrode are inserted into the furnace body, the furnace body system comprises a hollow furnace shell with a cooling water inlet and a cooling water outlet, a furnace cover is assembled at the top of the furnace shell, and a hollow furnace body support with a cooling water inlet and a cooling water outlet is arranged at the, the inner side of the furnace shell is provided with a furnace lining, the furnace body at the upper part of the furnace body support is internally provided with a furnace bottom anode electrode connected with a power supply, the upper electrode holder is connected with one side electrode of the transformer, and the other side electrode of the transformer is connected with the power supply; the lower electrode holder is connected with a power supply; a first voltmeter and a second voltmeter for monitoring voltage are respectively arranged between the upper electrode holder and the transformer and between the lower electrode holder and the power supply, a water pump and a water inlet thermocouple are arranged at a cooling water inlet supported by the furnace shell and the furnace body, and a water outlet thermocouple for monitoring water temperature is arranged at an outlet of the water pump and the water inlet thermocouple.
The center shaft cathode electrode, the peripheral enclosure type cathode electrode, the furnace shell, the furnace lining and the furnace bottom anode electrode are coaxially arranged.
The distance from the end part of the peripheral fence type cathode electrode to the upper part of the furnace bottom anode electrode is 1.0-2.0 times that from the end part of the central shaft cathode electrode to the upper part of the furnace bottom anode electrode.
The absolute value of the voltage loaded to the central shaft cathode electrode is 0.8-0.9 times of the absolute value of the voltage loaded to the peripheral fence type cathode electrode.
The transformer and the voltmeter are also respectively connected with a master control computer.
The water pump, the water inlet thermocouple and the water outlet thermocouple are respectively connected with a master control computer.
The power supply is a direct current power supply or an alternating current power supply.
The total cross section area of the cylindrical cathode sub-electrodes of the peripheral fence type cathode electrode is 1.0-1.5 times of the cross section area of the cathode electrode of the central shaft, and the number of the cylindrical cathode sub-electrodes is 3, 6, 9, 12, 15, 18, 21 or 24.
The control method of the fence type combined electrode ore-smelting furnace comprises the following steps:
1) firstly, a motor crawler device is controlled by a master control computer to drive a peripheral fence type cathode electrode and a central shaft cathode electrode to be inserted into a furnace lining;
2) adding raw material ore until furnace burden completely submerges the end part of the peripheral fence type cathode electrode;
3) pumping cooling water into the furnace shell and the furnace body support through a water pump, observing numerical values on a thermocouple at a water inlet and a thermocouple at a water outlet, and regulating the water pump to increase the flow rate of the cooling water through a master control computer if the numerical values exceed a set temperature;
3) the power supply is turned on and the transformer is adjusted to enable the voltage value U of the first voltmeter1Is the voltage value U of the second voltmeter20.8 to 0.9 times of;
4) during smelting, U1And U2All will fluctuate, and at the moment, the transformer is adjusted through the master control computer to keep U1＝(0.8～0.9)U2The relationship of (1);
5) after smelting is finished, firstly, the power supply is turned off, then the motor crawler device is controlled by the master control computer to drive the peripheral fence type cathode electrode and the middle shaft cathode electrode to leave the furnace lining, and then the discharge hole on the furnace shell is opened to discharge liquid ore and furnace slag.
The raw material ore is iron ore, chromium ore, manganese ore, silica, ferrosilicon, waste iron, calcium oxide or carbonaceous reducing agent.
The submerged arc furnace provided by the invention has reasonable structural design, and the end parts of the electrodes can heat the area which cannot be heated by electric heating in the traditional submerged arc furnace by controlling the immersion depth of different furnace materials of different electrodes, so that the problem of uneven heat distribution in the submerged arc furnace can be effectively solved, the melting and reducing time of the furnace materials in the furnace is obviously shortened, the utilization efficiency of electric energy in the furnace is obviously improved, and the submerged arc furnace can be widely applied to the metallurgical and chemical industries.
Drawings
FIG. 1 is a schematic view of the submerged arc melting furnace configuration of the present invention;
FIG. 2 is a schematic diagram of a peripheral fence type cathode electrode structure;
FIG. 3 is a current vector distribution diagram in the fence type combined electrode ore-smelting furnace when smelting h13 die steel;
FIG. 4 is a graph showing the temperature extremum in the conventional ore smelting furnace and 12-sub cathode fence type combined electrode ore smelting furnace as a function of time;
fig. 5 is a graph showing the change in energy utilization efficiency according to the number of sub-cathode electrodes (charge melting rate of 90%).
Number designation in the figures: 1. the furnace comprises an upper electrode holder, 2 a lower electrode holder, 3 an electrode copper tile, 4 a center shaft cathode electrode, 5 a peripheral fence type cathode electrode, 6 a furnace cover, 7 a furnace shell, 8 a furnace lining, 9 a furnace body support, 10 a furnace bottom anode electrode, 11 a power supply, 12 a transformer, 13 a first motor crawler belt device, 13-1 a second motor crawler belt device, 14 a master control computer, 15 a first voltmeter, 16 a second voltmeter, 17 a water pump, 18 a water inlet thermocouple, 18-1 a water outlet thermocouple, 19 an electrode master ring and 20 a cylindrical sub cathode electrode.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the furnace comprises an electrode system and a furnace body system, wherein the electrode system comprises a first motor crawler device 13 and a second motor crawler device 13-1 which are connected with a master control computer 14, an upper electrode holder 1 and a lower electrode holder 2 are respectively fixed on the first motor crawler device 13 and the second motor crawler device 13-1, the upper electrode holder 1 and the lower electrode holder 2 respectively clamp a central shaft cathode 4 and a peripheral fence cathode 5 through electrode copper tiles 3, the peripheral fence cathode 5 comprises a total electrode ring 19 and a plurality of cylindrical sub-cathodes 20, the central shaft cathode 4 passes through the total electrode ring 19 of the peripheral fence cathode 5, the furnace body is arranged at the lower ends of the central shaft cathode 4 and the peripheral fence cathode 5, the central shaft cathode 4 and the peripheral fence cathode 5 are inserted into the furnace body, and the furnace body system comprises a hollow structure with cooling water inlet, A furnace shell 7 with an outlet, a furnace cover 6 is assembled at the top of the furnace shell 7, a hollow furnace body support 9 with a cooling water inlet and a cooling water outlet is arranged at the bottom of the furnace shell 7, a furnace lining 8 is arranged at the inner side of the furnace shell 7, a furnace bottom anode 10 connected with a power supply 11 is assembled in the furnace body at the upper part of the furnace body support 9, an upper electrode holder 1 is connected with one side electrode of a transformer 12, and the other side electrode of the transformer 12 is connected with the power supply 11; the lower electrode holder 2 is connected with a power supply 11; first and second voltmeters 15 and 16 for monitoring voltage are respectively arranged between the upper electrode holder 1 and the transformer 12 and between the lower electrode holder 2 and the power supply 11, a water pump 17 and a water inlet thermocouple 18 are arranged at a cooling water inlet of the furnace shell 7 and the furnace body support 9, and a water outlet thermocouple 18-1 for monitoring water temperature is arranged at an outlet of the water pump and the water inlet thermocouple 18.
Wherein, the middle shaft cathode electrode 4, the peripheral enclosure type cathode electrode 5, the furnace shell 7, the furnace lining 8 and the furnace bottom anode electrode 10 are coaxially arranged; the distance from the end part of the peripheral fence type cathode electrode 5 to the upper part of the furnace bottom anode electrode 10 is 1.0-2.0 times that from the end part of the central shaft cathode electrode 4 to the upper part of the furnace bottom anode electrode 10; the absolute value of the voltage loaded to the central shaft cathode electrode 4 is 0.8-0.9 times of the absolute value of the voltage loaded to the peripheral fence type cathode electrode 5; the transformer 12 and the voltmeters 15 and 16 are also respectively connected with a master control computer; the water pump 17, the water inlet thermocouple 18 and the water outlet thermocouple 18-1 are respectively connected with a master control computer; the power supply 11 is a direct current power supply or an alternating current power supply; the total cross-sectional area of the cylindrical cathode sub-electrodes 20 of the peripheral fence type cathode electrode 5 is 1.0-1.5 times of the cross-sectional area of the central axis cathode electrode 4, and the number of the cylindrical cathode sub-electrodes 20 is 3, 6, 9, 12, 15, 18, 21 or 24.
When the ore smelting furnace provided by the invention is applied, the whole working flow is as follows:
1) firstly, a motor crawler belt device 13 is controlled by a master control computer 14 to drive a peripheral fence type cathode electrode 5 and a central shaft cathode electrode 4 to be inserted into a furnace lining 8;
2) adding raw material ore until the end part of the peripheral fence type cathode electrode 5 is completely filled with furnace burden;
3) cooling water is pumped into the furnace shell 7 and the furnace body support 9 through the water pump 17, the numerical values of the thermocouple 18 at the water inlet and the thermocouple 18-1 at the water outlet are observed, and if the numerical values exceed the set temperature, the flow of the cooling water is increased by adjusting the water pump 17 through the master control computer 14;
3) the power supply 11 is turned on and the transformer 12 is adjusted so that the voltage value U of the first voltmeter 151Is the voltage value U of the second voltmeter 1620.8 to 0.9 times of;
4) during smelting, U1And U2All will fluctuate, and at this time, the transformer 12 is adjusted through the master control computer 14 to keep U1＝(0.8～0.9)U2The relationship of (1);
5) after smelting is finished, the power supply 11 is firstly turned off, then the motor crawler belt device 13 is controlled by the master control computer 14 to drive the peripheral fence type cathode electrode 5 and the central shaft cathode electrode 4 to leave the furnace lining 8, and then a discharge hole on the furnace shell 7 is opened to discharge liquid ore and furnace slag.
Wherein the raw material ore is iron ore, chromium ore, manganese ore, silica, ferrosilicon, waste iron, calcium oxide or carbonaceous reducing agent.
The numerical simulation experiment method is a mature method for researching the flowing and heat transfer of multiple physical fields, and a plurality of research institutions analyze the distribution condition of the in-furnace physical field of the submerged arc melting furnace and the smelting performance through numerical simulation. For the convenience of simulation solution, only furnace burden and electrodes are selected for simulation calculation, and meanwhile, as the two kinds of submerged arc smelting furnaces are in axial symmetry structures, when the number of cylindrical cathode electrodes is 9, the selected calculation area is 1/9 of the whole model area. Fig. 3 is a current vector distribution diagram in the fence type combined electrode ore-smelting furnace when smelting h13 die steel. As can be seen from the figure, partial current in the furnace of the fence type combined electrode submerged arc melting furnace flows out from the end of the cylindrical sub-cathode electrode, which makes the distribution of joule heat in the furnace more uniform, compared with the conventional submerged arc melting furnace. Under the condition that the same electrode is immersed in the furnace burden to a certain depth, compared with the traditional submerged arc melting furnace, the Joule heat extreme value in the novel furnace is reduced by 25%, and the submerged arc melting furnace is safer to operate.
Fig. 4 is a graph showing the temperature extreme value in the traditional ore smelting furnace and the fence type combined electrode ore smelting furnace changing with time. As can be seen from the figure, compared with the traditional ore smelting furnace, the fence type combined electrode ore smelting furnace has the advantage that the extreme temperature value in the furnace is not high all the time in the whole smelting process because the heat in the furnace is homogenized. Particularly, the temperature extreme value in the fence type combined electrode ore smelting furnace is always in a relatively stable state in the middle and later smelting periods, so that the requirement on temperature control in the ore smelting furnace is lowered. Compared with the traditional ore smelting furnace, the temperature extreme value in the furnace is averagely reduced by 5.2% within 0-7200 s. And the reduction of the temperature extreme value greatly improves the operation safety of the submerged arc furnace.
Meanwhile, the fence type combined electrode ore smelting furnace is adopted, so that the utilization efficiency of the energy in the furnace is greatly improved. FIG. 5 is a graph showing the change of energy utilization efficiency with the number of sub-electrodes when the melting rate of the charge in the furnace reaches 90%. As can be seen from the figure, as the number of the cathode and anode electrodes increases, the energy utilization efficiency increases. This can be explained as the number of the cathode electrodes increases, the current can flow into the furnace material from more cathode electrodes, the homogenization degree of the electromagnetic field in the furnace is improved, and the distribution of the joule heat in the furnace is more uniform. In the research range, the average energy utilization efficiency of the fence type combined electrode ore-smelting furnace is improved by 4.1 percent compared with the traditional ore-smelting furnace, and the smelting performance of the fence type combined electrode ore-smelting furnace is improved compared with the traditional ore-smelting furnace.
Claims (10)
1. The utility model provides a rail type combined electrode ore-smelting furnace which characterized in that: the furnace comprises an electrode system and a furnace body system, wherein the electrode system comprises a first motor crawler device and a second motor crawler device (13 and 13-1) which are connected with a master control computer (14), an upper electrode holder (1) and a lower electrode holder (2) are respectively fixed on the first motor crawler device and the second motor crawler device (13 and 13-1), the upper electrode holder (1) and the lower electrode holder (2) are respectively clamped with a central shaft cathode electrode (4) and a peripheral fence cathode electrode (5) through electrode copper tiles (3), the peripheral fence cathode electrode (5) consists of a main electrode ring (19) and a plurality of cylindrical sub cathode electrodes (20), the central shaft cathode electrode (4) passes through the main electrode ring (19) of the peripheral fence cathode electrode (5), the furnace body is arranged at the lower ends of the central shaft cathode electrode (4) and the peripheral fence cathode electrode (5), the central shaft cathode electrode (4) and the peripheral fence cathode electrode (5) are inserted into the furnace body, the furnace body system comprises a furnace shell (7) with a hollow structure and a cooling water inlet and outlet, wherein the top of the furnace shell (7) is provided with a furnace cover (6), the bottom of the furnace shell is provided with a furnace body support (9) with a hollow structure and a cooling water inlet and outlet, the inner side of the furnace shell (7) is provided with a furnace lining (8), a furnace bottom anode electrode (10) connected with a power supply (11) is assembled in the furnace body at the upper part of the furnace body support (9), an upper electrode holder (1) is connected with one side electrode of a transformer (12), and the other side electrode of the transformer (12) is connected with the power supply (11); the lower electrode holder (2) is connected with a power supply (11); a first voltmeter (15) and a second voltmeter (16) for monitoring voltage are respectively arranged between the upper electrode holder (1) and the transformer (12) and between the lower electrode holder (2) and the power supply (11), a water pump (17) and a water inlet thermocouple (18) are arranged at cooling water inlets of the furnace shell (7) and the furnace body support (9), and a water outlet thermocouple (18-1) for monitoring water temperature is arranged at an outlet of the furnace shell.
2. The fence type combined electrode submerged arc smelting furnace according to claim 1, characterized in that the central shaft cathode electrode (4), the peripheral fence type cathode electrode (5), the furnace shell (7), the furnace lining (8) and the furnace bottom anode electrode (10) are coaxially installed.
3. The fence type combined electrode submerged arc smelting furnace according to claim 1, wherein the distance from the end of the peripheral fence type cathode electrode (5) to the upper part of the hearth anode electrode (10) is 1.0-2.0 times the distance from the end of the central shaft cathode electrode (4) to the upper part of the hearth anode electrode (10).
4. The fence type combined electrode submerged arc smelting furnace according to claim 1, wherein the absolute value of the voltage applied to the central shaft cathode electrode (4) is 0.8 to 0.9 times the absolute value of the voltage applied to the peripheral fence type cathode electrode (5).
5. The fence type combined electrode ore smelting furnace according to claim 1, wherein the transformer (12) and the voltmeters (15, 16) are further connected with a master control computer respectively.
6. The fence type combined electrode ore smelting furnace according to claim 1, wherein the water pump (17), the water inlet thermocouple (18) and the water outlet thermocouple (18-1) are respectively connected with a master control computer.
7. The fence type combined electrode submerged arc smelting furnace according to claim 1, characterized in that the power supply (11) is a direct current power supply or an alternating current power supply.
8. The fence type combined electrode submerged arc smelting furnace according to claim 1, wherein the total cross-sectional area of the cylindrical sub-cathode electrodes (20) of the peripheral fence type cathode electrode 5 is 1.0 to 1.5 times the cross-sectional area of the central axis cathode electrode (4), and the number of the cylindrical sub-cathode electrodes (20) is 3, 6, 9, 12, 15, 18, 21 or 24.
9. The control method of the fence type combined electrode ore-smelting furnace according to claim 1, characterized in that:
1) firstly, a motor crawler device (13) is controlled by a master control computer (14) to drive a peripheral fence type cathode electrode (5) and a central shaft cathode electrode (4) to be inserted into a furnace lining (8);
2) adding raw material ore until the furnace burden completely submerges the end part of the peripheral fence type cathode electrode (5);
3) cooling water is pumped into the furnace shell (7) and the furnace body support (9) through a water pump (17), numerical values on a water inlet thermocouple (18) and a water outlet thermocouple (18-1) are observed, and if the numerical values exceed a set temperature, the water pump (17) is adjusted through a master control computer (14) to increase the flow rate of the cooling water;
3) the power supply (11) is turned on and the transformer (12) is adjusted so that the voltage value U of the first voltmeter (15)1Is the voltage value U of the second voltmeter (16)20.8 to 0.9 times of;
4) in situ meltingIn the process of refining, U1And U2All will fluctuate, and at the moment, the transformer (12) is adjusted through the master control computer (14) to keep U1＝(0.8～0.9)U2The relationship of (1);
5) after smelting is finished, firstly, a power supply (11) is turned off, then a motor crawler device (13) is controlled through a master control computer (14), a peripheral fence type cathode electrode (5) and a central shaft cathode electrode (4) are driven to leave a furnace lining (8), and then a discharge hole in a furnace shell (7) is opened to discharge liquid ore and furnace slag.
10. The method for controlling a fence type combined electrode ore-heating smelting furnace according to claim 9, wherein the raw material ore is iron ore, chromium ore, manganese ore, silica, ferrosilicon, scrap iron, calcium oxide, or carbonaceous reducing agent.
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| CN210464020U (en) * | 2019-08-01 | 2020-05-05 | 江苏积力环保科技有限公司 | Three-phase AC submerged arc furnace |
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2020
- 2020-06-16 CN CN202010549066.1A patent/CN111811251B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2082000C (en) * | 1991-11-04 | 1998-02-17 | Dane Meredith | Anode for a direct-current electric arc furnace |
| JPH07190624A (en) * | 1993-12-27 | 1995-07-28 | Kawasaki Steel Corp | Furnace lid retaining device for electrode rotating system electric furnace |
| CN2559950Y (en) * | 2002-08-12 | 2003-07-09 | 高奇帮 | Electric smelting magnesia furnace |
| JP2005321121A (en) * | 2004-05-06 | 2005-11-17 | Fuji Electric Systems Co Ltd | Electric melting furnace |
| CN201463505U (en) * | 2009-07-14 | 2010-05-12 | 永州市兴发电熔科技有限公司 | DC arc furnace |
| CN102625508A (en) * | 2012-04-11 | 2012-08-01 | 西安越达环保科技有限公司 | Electrode lifting mechanism with adjustable electrode circle, furnace cover and electric arc furnace |
| CN210464020U (en) * | 2019-08-01 | 2020-05-05 | 江苏积力环保科技有限公司 | Three-phase AC submerged arc furnace |
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