CN102331190B - Dynamic ore-smelting furnace electrode adjusting device and dynamic ore-smelting furnace electrode adjusting method - Google Patents
Dynamic ore-smelting furnace electrode adjusting device and dynamic ore-smelting furnace electrode adjusting method Download PDFInfo
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Abstract
The invention provides a dynamic ore-smelting furnace electrode adjusting method which comprises the following steps of: collecting the phase voltage and the line current at a three-phase electrode in real time to generate corresponding phase voltage value and line current value; judging whether the generated phase voltage value is matched to a preset phase voltage interval value, and outputting a first preset control signal to a digital hydraulic device connected with the three-phase electrode when the generated phase voltage value is judged not to be matched with the preset phase voltage interval value; judging whether the next received line current value is matched with a preset line current interval value when the received phase voltage value is judged to be matched with the preset line current interval value, and outputting a second preset control signal to the digital hydraulic device connected with the three-phase electrode when the next received line current value is judged not to be matched with the preset line current interval value; and controlling the up-and-down motion of the three-phase electrode by the digital hydraulic device according to the control signals. The invention also provides a dynamic ore-smelting furnace electrode adjusting device.
Description
Technical field:
The present invention relates to the ferroalloy smelting technical field, particularly the dynamic adjusting device of a kind of electrodes in mine hot stove and electrodes in mine hot stove dynamic adjusting method.
Background technology:
The hot stove in ore deposit mainly is the highly energy-consuming equipment of industrial primary product such as ferroalloy smelting class and calcium carbide.In the Northwest, this type of mine heat furnace smelting producer is very many, and the type of furnace is also increasing, such as a hot stove in 25000KVA ore deposit, per hour power consumption is exactly 25000 degree, and every day, power consumption reached 600,000 degree, and such type of furnace has family more than 2,000 in the whole nation, be distributed in the Northwest more than 90%, mainly be distributed in ground such as Ningxia, Inner Mongol, Shaanxi, Gansu, Qinghai, Xinjiang.
The distribution operation of the hot stove in tradition ore deposit mainly is to rely on artificial experience to finish.Because distribution operation personnel's experience level is uneven, existing equipment can not reflect the actual state of the hot stove of ore removal fully in addition, technology is in fluctuation status all the time, bad when having caused mine heat furnace smelting index fashion, production cost can not better controlled, sometimes the working of a furnace worsens, ton product power consumption rises to 10000 degree by 8000 degree, and in one period very long cycle (1-2 month at least, 5-6 month at most), the working of a furnace could be adjusted, even want prepurging when serious, again blow-on again, cause huge economic loss (1,000 ten thousand yuan at least), high energy-consuming enterprises is made the matter worse, seriously hindered the development of the sector.
For this reason, the ferroalloy manufacturer that had in recent years and professional science and technology company are are actively researching and developing automatic power distribution control system, though obtained some effects, but also have following defective: the mode of control three-phase electrode still adopts common hydraulic system or hoisting system, and control accuracy does not reach designing requirement far away.
Summary of the invention:
In view of this, be necessary to provide a kind of dynamic adjusting device of electrodes in mine hot stove that can accurately control the three-phase electrode lifting.
Also be necessary to provide a kind of electrodes in mine hot stove dynamic adjusting method that can accurately control the three-phase electrode lifting.
The dynamic adjusting device of a kind of electrodes in mine hot stove comprises master control operating desk, data acquisition cabinet and digital hydraulic means.
The data acquisition cabinet is connected with first and second side of the furnace transformer of the hot stove in ore deposit, short wet end position and three-phase electrode by the data acquisition cable, the data acquisition cabinet is used for gathering in real time phase voltage and the line current at three-phase electrode position, produce corresponding phase voltage value and line current value, and send phase voltage value and line current value to the master control operating desk;
The master control operating desk is connected with the data acquisition cabinet, and receive phase voltage value and the line current value that the data acquisition cabinet provides in real time, judge whether the phase voltage value that receives is complementary with the phase voltage interval value of presetting, when the phase voltage value of judging reception is not complementary with the phase voltage interval value of presetting, the first default control signal of output is given digital hydraulic means, when the phase voltage value of judging reception is complementary with the phase voltage interval value of presetting, judge whether the line current value that receives again is complementary with the line current interval value of presetting, when the line current value of judging reception again was not complementary with the line current interval value of presetting, second control signal that output is preset was to digital hydraulic means;
Wherein the master control operating desk is exported default control signal in the following way:
If Ua, Ub, Uc are the phase voltage of three-phase electrode, the master control operating desk is judged whether balance of three phase voltages corresponding with three-phase electrode according to following formula:
That is: U-U1≤Ua≤U+U1 U is voltage setting value
U-U1≤Ub≤U+U1 U1 is voltage dead band setting value
U-U1≤Uc≤U+U1
The first default control signal of output is given digital hydraulic means when judging imbalance of three-phase voltage,
Work as Ua, Ub, Uc be in the bound scope time, and the master control operating desk is judged according to following formula and guaranteed the electrode power balance:
That is: I-I1≤Ia≤I+I1 I is current setting value
I-I1≤Ib≤I+I1 I1 is electric current dead band setting value
I-I1≤Ic≤I+I1
Judging three line currents when unequal, the second default control signal of output is given digital hydraulic means;
The numeral hydraulic means is connected with master control operating desk, electrode, the numeral hydraulic means receives the control signal that the master control operating desk provides, and move up and down according to control signal control three-phase electrode, electrode is maintained in the planar range, thereby change the arc power size and join hot coefficient, guarantee that three-phase electrode is in the optimum position.
A kind of electrodes in mine hot stove dynamic adjusting method may further comprise the steps:
Gather phase voltage and the line current at three-phase electrode position in real time, produce corresponding phase voltage value and line current value;
Judge whether the phase voltage value that produces is complementary with the phase voltage interval value of presetting, when the phase voltage value of judging generation is not complementary with the phase voltage interval value of presetting, the first default control signal of output is given the digital hydraulic means that is connected with three-phase electrode, wherein exports first control signal by following account form:
If Ua, Ub, Uc are the phase voltage of three-phase electrode, judge whether balance of three phase voltages corresponding with three-phase electrode according to following formula:
That is: U-U1≤Ua≤U+U1 U is voltage setting value
U-U1≤Ub≤U+U1 U1 is voltage dead band setting value
U-U1≤Uc≤U+U1
The first default control signal of output is given digital hydraulic means when judging imbalance of three-phase voltage, so that digital hydraulic means control three-phase electrode ascending, descending, and then under the prerequisite of the phase voltage balance that guarantees three-phase electrode, begin to regulate three-phase electrode acting balance, i.e. Pa=Pb=Pc again; Pa=Ua*Ia; Pb=Ub*Ib; Pc=Uc*Ic;
When the phase voltage value of judging reception is complementary with the phase voltage interval value of presetting, judge whether the line current value that receives again is complementary with the line current interval value of presetting, when the line current value of judging reception again is not complementary with the line current interval value of presetting, the second default control signal of output is given the digital hydraulic means that is connected with three-phase electrode, exports second control signal by following account form:
Work as Ua, Ub, Uc be in the bound scope time, judges according to following formula and guarantee the electrode power balance:
That is: I-I1≤Ia≤I+I1 I is current setting value
I-I1≤Ib≤I+I1 I1 is electric current dead band setting value
I-I1≤Ic≤I+I1
Judging three line currents when unequal, the second default control signal of output is given digital hydraulic means, so that the ascending, descending of digital hydraulic means control three-phase electrode, and then guaranteeing the three-phase electrode power-balance;
The digital hydraulic means that is connected with three-phase electrode moves up and down according to control signal control three-phase electrode, and electrode is maintained in the planar range, thereby changes the arc power size and join hot coefficient, guarantees that three-phase electrode is in the optimum position.
The dynamic adjusting device of electrodes in mine hot stove provided by the invention and electrodes in mine hot stove dynamic adjusting method, the preferential electrode voltage balance of regulating, till the mutual balance of the phase voltage of electrode, control the mode of power-balance and export corresponding accurately control signal and give digital hydraulic means by adjusting the three-phase electrode line current again, digital hydraulic means is accurately controlled the three-phase electrode lifting according to accurate control signal.
Description of drawings:
Fig. 1 is the functional block diagram of the dynamic adjusting device of electrodes in mine hot stove of a preferred embodiments.
Fig. 2 is the application structure schematic diagram of the dynamic adjusting device of electrodes in mine hot stove among Fig. 1.
Fig. 3 is the electrodes in mine hot stove dynamic adjusting method flow chart of a preferred embodiments.
Among the figure: the electrodes in mine hot stove dynamic adjusting method step S300～S303 of the dynamic adjusting device 10 of electrodes in mine hot stove, data acquisition cabinet 11, master control operating desk 12, digital hydraulic means 13, hydraulic power unit 131, digital hydraulic pressure unit 132, electrode control oil cylinder 133, the hot stove 20 in ore deposit, furnace transformer 21, short net 22, three-phase electrode 23, electrode holder assembly 24, a preferred embodiments
The specific embodiment:
The present invention is with the smelting process of the hot stove in ore deposit and the product that advanced Industrial Computer Control system combines closely, and simultaneously, introduces digital hydraulic system first in control, makes control system more accurate.
The functional block diagram of the dynamic adjusting device of electrodes in mine hot stove as shown in Figure 1, the dynamic adjusting device 10 of electrodes in mine hot stove comprises data acquisition cabinet 11, master control operating desk 12 and digital hydraulic means 13.
Data acquisition cabinet 11 is connected with the furnace transformer 21 of digital hydraulic means 13, the hot stove 20 in ore deposit, short net 22 and three-phase electrode 23 by the data acquisition cable, data acquisition cabinet 11 is gathered the parameter signal of furnace transformer 21 first and second sides, short net 22 and three-phase electrode 23 in real time, produce the corresponding parameters data, and send supplemental characteristic to master control operating desk 12.For example, data acquisition cabinet 11 is gathered phase voltage, line current and the power at three-phase electrode 23 positions, and data acquisition cabinet 11 is gathered voltage and the electric current on furnace transformer 21 secondary sides, the short net 22, also gathers the hydraulic pressure signal of digital hydraulic means 13.Wherein, mainly be provided with transmitters such as voltage, electric current, power and power factor in the data acquisition cabinet 11, each speed changer is gathered digital hydraulic means 13, furnace transformer secondary side, is lacked net to each electric parameter data of three-phase electrode by the data acquisition cable, and each electric parameter data that will collect then send master control operating desk 12 to.
Master control operating desk 12 is connected with data acquisition cabinet 11, and receives the supplemental characteristic (voltage, electric current, power etc.) that data acquisition cabinet 11 provides, and the supplemental characteristic that receives is handled.For example, master control operating desk 12 receives phase voltage value and the line current value that data acquisition cabinet 11 provides in real time, judge whether the phase voltage value that receives is complementary with the phase voltage interval value of presetting, when the phase voltage value of judging reception is not complementary with the phase voltage interval value of presetting, the first default control signal of output is given digital hydraulic means 13, when the phase voltage value of judging reception is complementary with the phase voltage interval value of presetting, judge whether the line current value that receives again is complementary with the line current interval value of presetting, when the line current value of judging reception again was not complementary with the line current interval value of presetting, second control signal that output is preset was to digital hydraulic means 13.In the present embodiment, master control operating desk 12 is exported default control signal in the following way:
If Ua, Ub, Uc are the phase voltage of three-phase electrode, master control operating desk 12 is judged whether balance of three phase voltages corresponding with three-phase electrode according to following formula:
That is: U-U1≤Ua≤U+U1 U is voltage setting value
U-U1≤Ub≤U+U1 U1 is voltage dead band setting value
U-U1≤Uc≤U+U1
The first default control signal of output is given digital hydraulic means 13 when judging imbalance of three-phase voltage, so that digital hydraulic means 13 control three-phase electrode ascending, descendings, and then under the prerequisite of the phase voltage balance that guarantees three-phase electrode, begin to regulate three-phase electrode acting balance, i.e. Pa=Pb=Pc again; Pa=Ua*Ia; Pb=Ub*Ib; Pc=Uc*Ic;
Work as Ua, Ub, Uc be in the bound scope time, and master control operating desk 12 is judged according to following formula and guaranteed the electrode power balance:
That is: I-I1≤Ia≤I+I1 I is current setting value
I-I1≤Ib≤I+I1 I1 is electric current dead band setting value
I-I1≤Ic≤I+I1
Judging three line currents when unequal, the second default control signal of output is given digital hydraulic means 13, so that the 13 control three-phase electrode ascending, descendings of digital hydraulic means, and then guaranteeing the three-phase electrode power-balance.
Further, master control operating desk 12 comprises industrial computer, Programmable Logic Controller and input equipment, industrial computer is used for according to the corresponding control signal of supplemental characteristic output that receives, automatically adjust the position of each electrode by Programmable Logic Controller and digital hydraulic means, make electrode be in best duty all the time, industrial computer is also according to the every important parameter of the supplemental characteristic that receives at the hot stove in display terminal output ore deposit, get information about the road conditions of the hot stove in ore deposit for the site operation personnel, for example the site operation personnel can watch secondary voltage value by display interface, the secondary current value, the actual numerical value of operation resistance and power and the curve of cyclical fluctuations thereof etc.Operating personnel can manually adjust the up and down of electrode or operation such as press by input equipment, embody the carefree switching of automatic/hand, strengthen flexibility.
Numeral hydraulic means 13 is connected with master control operating desk 12, three-phase electrode, numeral hydraulic means 13 receives the control signal that master control operating desk 12 provides, and move up and down according to control signal control three-phase electrode, three-phase electrode is maintained in the planar range, thereby change the arc power size and join hot coefficient, guarantee that three-phase electrode is in the optimum position.
In other embodiments, data acquisition cabinet 11 is also gathered oil pressure and the oil level of Hydraulic Station in the hydraulic pressure of recirculated water in the water-cooling system of the hot stove in ore deposit and water temperature, the digital hydraulic system 13; The oil level of furnace transformer and oil temperature, the running statuses of dust pelletizing system etc. also produce the corresponding parameters data, and supplemental characteristic offered industrial computer in the master control operating desk 12, the supplemental characteristic that the industrial computer real time record receives, and send alarm sound when supplemental characteristic does not satisfy the preset range value judging, so significantly reduce the incidence of equipment breakdown.
Please referring to the application structure schematic diagram of the dynamic adjusting device of electrodes in mine hot stove shown in Figure 2, the dynamic adjusting device 10 of electrodes in mine hot stove is connected with submerged arc furnace system 20, wherein, digital hydraulic system 13 comprises hydraulic power unit 131, numeral hydraulic pressure unit 132, electrode control oil cylinder 133, hydraulic power unit 131 electrically connects with master control operating desk 12 and digital hydraulic pressure unit 132, electrode control oil cylinder 133 electrically connects with digital hydraulic pressure unit 132, electrode control oil cylinder 133 also is connected with three-phase electrode 23 by electrode holder assembly 24, data acquisition cabinet 11 offers master control operating desk 12 with the supplemental characteristic that collects, master control operating desk 12 is given digital hydraulic system 13 according to the supplemental characteristic output control signal that receives, so that digital hydraulic system 13 control three-phase electrodes 23 move up and down, it is maintained in the planar range, thereby change the arc power size and join hot coefficient, guarantee that electrode is in the optimum position, guarantee the acting relative equilibrium of three electrodes, three crucible molten baths of electrode lower end are also maximum.
A kind of electrodes in mine hot stove dynamic adjusting method as shown in Figure 3 may further comprise the steps:
Step S300 gathers phase voltage and the line current at three-phase electrode position in real time, produces corresponding phase voltage value and line current value.
Step S301, judge whether the phase voltage value that produces is complementary with the phase voltage interval value of presetting, when the phase voltage value of judging generation was not complementary with the phase voltage interval value of presetting, the first default control signal of output was given the digital hydraulic means that is connected with three-phase electrode.For example, can export first control signal by following account form: establish Ua, Ub, Uc is the phase voltage of three-phase electrode, judge whether balance of three phase voltages corresponding with three-phase electrode according to following formula:
That is: U-U1≤Ua≤U+U1 U is voltage setting value
U-U1≤Ub≤U+U1 U1 is voltage dead band setting value
U-U1≤Uc≤U+U1
The first default control signal of output is given digital hydraulic means when judging imbalance of three-phase voltage, so that digital hydraulic means control three-phase electrode ascending, descending, and then under the prerequisite of the phase voltage balance that guarantees three-phase electrode, begin to regulate three-phase electrode acting balance, i.e. Pa=Pb=Pc again; Pa=Ua*Ia; Pb=Ub*Ib; Pc=Uc*Ic.
Step S302, when the phase voltage value of judging reception is complementary with the phase voltage interval value of presetting, judge whether the line current value that receives again is complementary with the line current interval value of presetting, when the line current value of judging reception again was not complementary with the line current interval value of presetting, second control signal that output is preset was to the digital hydraulic means that is connected with three-phase electrode.For example, can export second control signal by following account form: work as Ua, Ub, Uc be in the bound scope time, judges according to following formula and guarantee the electrode power balance:
That is: I-I1≤Ia≤I+I1 I is current setting value
I-I1≤Ib≤I+I1 I1 is electric current dead band setting value
I-I1≤Ic≤I+I1
Judging three line currents when unequal, the second default control signal of output is given digital hydraulic means, so that the ascending, descending of digital hydraulic means control three-phase electrode, and then guaranteeing the three-phase electrode power-balance.
Step S303, the digital hydraulic means that is connected with three-phase electrode moves up and down according to control signal control three-phase electrode, and electrode is maintained in the planar range, thereby changes the arc power size and join hot coefficient, guarantees that three-phase electrode is in the optimum position.
The dynamic adjusting device 10 of electrodes in mine hot stove provided by the invention and electrodes in mine hot stove dynamic adjusting method, the preferential electrode voltage balance of regulating, till the mutual balance of the phase voltage of electrode, control the mode of power-balance and export corresponding accurately control signal and give digital hydraulic means by adjusting the three-phase electrode line current again, digital hydraulic means is accurately controlled the three-phase electrode lifting according to accurate control signal.
Claims (6)
1. the dynamic adjusting device of electrodes in mine hot stove comprises master control operating desk, data acquisition cabinet, it is characterized in that: the dynamic adjusting device of electrodes in mine hot stove also comprises digital hydraulic means;
The data acquisition cabinet is connected with first and second side of the furnace transformer of the hot stove in ore deposit, short wet end position and three-phase electrode by the data acquisition cable, the data acquisition cabinet is used for gathering in real time phase voltage and the line current at three-phase electrode position, produce corresponding phase voltage value and line current value, and send phase voltage value and line current value to the master control operating desk;
The master control operating desk is connected with the data acquisition cabinet, and receive phase voltage value and the line current value that the data acquisition cabinet provides in real time, judge whether the phase voltage value that receives is complementary with the phase voltage interval value of presetting, when the phase voltage value of judging reception is not complementary with the phase voltage interval value of presetting, the first default control signal of output is given digital hydraulic means, when the phase voltage value of judging reception is complementary with the phase voltage interval value of presetting, judge whether the line current value that receives again is complementary with the line current interval value of presetting, when the line current value of judging reception again was not complementary with the line current interval value of presetting, second control signal that output is preset was to digital hydraulic means;
Wherein the master control operating desk is exported default control signal in the following way:
If Ua, Ub, Uc are the phase voltage of three-phase electrode, the master control operating desk is judged whether balance of three phase voltages corresponding with three-phase electrode according to following formula:
That is: U-U1≤Ua≤U+U1 U is voltage setting value
U-U1≤Ub≤U+U1 U1 is voltage dead band setting value
U-U1≤Uc≤U+U1
The first default control signal of output is given digital hydraulic means when judging imbalance of three-phase voltage, works as Ua, and Ub, Uc be in the bound scope time, and the master control operating desk is judged according to following formula and guaranteed the electrode power balance:
That is: I-I1≤Ia≤I+I1 I is current setting value
I-I1≤Ib≤I+I1 I1 is electric current dead band setting value
I-I1≤Ic≤I+I1
Judging three line currents when unequal, the second default control signal of output is given digital hydraulic means;
The numeral hydraulic means is connected with master control operating desk, electrode, the numeral hydraulic means receives the control signal that the master control operating desk provides, and move up and down according to control signal control three-phase electrode, electrode is maintained in the planar range, thereby change the arc power size and join hot coefficient, guarantee that three-phase electrode is in the optimum position.
2. the dynamic adjusting device of electrodes in mine hot stove according to claim 1, it is characterized in that: the master control operating desk gets information about the working of a furnace of the hot stove in ore deposit also according to every important parameter of the supplemental characteristic that receives at the hot stove in display terminal output ore deposit for the site operation personnel.
3. the dynamic adjusting device of electrodes in mine hot stove according to claim 1, it is characterized in that: the data acquisition cabinet is also gathered the running status of the oil level of the oil pressure of Hydraulic Station in the hydraulic pressure of recirculated water in the water-cooling system of the hot stove in ore deposit and water temperature, the digital hydraulic system and oil level, furnace transformer and oil temperature, dust pelletizing system and is produced the corresponding parameters data, and supplemental characteristic offered the master control operating desk, the supplemental characteristic that master control operating desk real time record receives, and send alarm sound when supplemental characteristic does not satisfy the preset range value judging.
4. the dynamic adjusting device of electrodes in mine hot stove according to claim 1, it is characterized in that: digital hydraulic means comprises hydraulic power unit, digital hydraulic pressure unit, electrode control oil cylinder, hydraulic power unit and master control operating desk and digital hydraulic pressure unit electrically connect, electrode control oil cylinder and digital hydraulic pressure unit electrically connect, and electrode control oil cylinder also is connected with three-phase electrode by the electrode holder assembly.
5. electrodes in mine hot stove dynamic adjusting method may further comprise the steps:
Gather phase voltage and the line current at three-phase electrode position in real time, produce corresponding phase voltage value and line current value;
Judge whether the phase voltage value that produces is complementary with the phase voltage interval value of presetting, when the phase voltage value of judging generation is not complementary with the phase voltage interval value of presetting, the first default control signal of output is given the digital hydraulic means that is connected with three-phase electrode, wherein exports first control signal by following account form:
If Ua, Ub, Uc are the phase voltage of three-phase electrode, judge whether balance of three phase voltages corresponding with three-phase electrode according to following formula:
That is: U-U1≤Ua≤U+U1 U is voltage setting value
U-U1≤Ub≤U+U1 U1 is voltage dead band setting value
U-U1≤Uc≤U+U1
The first default control signal of output is given digital hydraulic means when judging imbalance of three-phase voltage, so that digital hydraulic means control three-phase electrode ascending, descending, and then under the prerequisite of the phase voltage balance that guarantees three-phase electrode, begin to regulate three-phase electrode acting balance, i.e. Pa=Pb=Pc again; Pa=Ua*Ia; Pb=Ub*Ib; Pc=Uc*Ic;
When the phase voltage value of judging reception is complementary with the phase voltage interval value of presetting, judge whether the line current value that receives again is complementary with the line current interval value of presetting, when the line current value of judging reception again is not complementary with the line current interval value of presetting, the second default control signal of output is given the digital hydraulic means that is connected with three-phase electrode, exports second control signal by following account form:
Work as Ua, Ub, Uc be in the bound scope time, judges according to following formula and guarantee the electrode power balance:
That is: I-I1≤Ia≤I+I1 I is current setting value
I-I1≤Ib≤I+I1 I1 is electric current dead band setting value
I-I1≤Ic≤I+I1
Judging three line currents when unequal, the second default control signal of output is given digital hydraulic means, so that the ascending, descending of digital hydraulic means control three-phase electrode, and then guaranteeing the three-phase electrode power-balance;
The digital hydraulic means that is connected with three-phase electrode moves up and down according to control signal control three-phase electrode, and electrode is maintained in the planar range, thereby changes the arc power size and join hot coefficient, guarantees that three-phase electrode is in the optimum position.
6. electrodes in mine hot stove dynamic adjusting method according to claim 5 is characterized in that, and is further comprising the steps of:
Gather in real time the running status of the oil level of the oil pressure of Hydraulic Station in the hydraulic pressure of recirculated water in the water-cooling system of the hot stove in ore deposit and water temperature, the digital hydraulic system and oil level, furnace transformer and oil temperature, dust pelletizing system and produce the corresponding parameters data;
The supplemental characteristic that real time record collects;
When not satisfying the preset range value, sends supplemental characteristic alarm sound judging.
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| US4620308A (en) * | 1985-10-30 | 1986-10-28 | Lectromelt Corporation | Arc furnace electrode control |
| CN1244333A (en) * | 1997-03-19 | 2000-02-09 | 西门子公司 | Regulation or control of fusion process in three-phase current arc furnace |
| CN201340199Y (en) * | 2008-12-31 | 2009-11-04 | 西安重鑫电炉设备有限公司 | Automatic charged slipping control device for submerged arc furnace electrode |
| CN201377988Y (en) * | 2009-03-11 | 2010-01-06 | 深圳市恒拓科技有限公司 | Quick-change electrode device and induction heating device equipped with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002208472A (en) * | 2001-01-09 | 2002-07-26 | Toshiba Eng Co Ltd | Arc furnace device |
| JP4786952B2 (en) * | 2005-07-14 | 2011-10-05 | スチールプランテック株式会社 | Electrode lift control device for AC arc furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4620308A (en) * | 1985-10-30 | 1986-10-28 | Lectromelt Corporation | Arc furnace electrode control |
| CN1244333A (en) * | 1997-03-19 | 2000-02-09 | 西门子公司 | Regulation or control of fusion process in three-phase current arc furnace |
| CN201340199Y (en) * | 2008-12-31 | 2009-11-04 | 西安重鑫电炉设备有限公司 | Automatic charged slipping control device for submerged arc furnace electrode |
| CN201377988Y (en) * | 2009-03-11 | 2010-01-06 | 深圳市恒拓科技有限公司 | Quick-change electrode device and induction heating device equipped with same |
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| JP特开2002-208472A 2002.07.26 |
| JP特开2007-26825A 2007.02.01 |
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