EP4110015A1 - Procédé de fonctionnement pour un four à arc - Google Patents

Procédé de fonctionnement pour un four à arc Download PDF

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Publication number
EP4110015A1
EP4110015A1 EP21180899.3A EP21180899A EP4110015A1 EP 4110015 A1 EP4110015 A1 EP 4110015A1 EP 21180899 A EP21180899 A EP 21180899A EP 4110015 A1 EP4110015 A1 EP 4110015A1
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EP
European Patent Office
Prior art keywords
control device
electrodes
phase
arc furnace
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21180899.3A
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German (de)
English (en)
Inventor
Thomas Matschullat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Germany GmbH
Original Assignee
Primetals Technologies Germany GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Germany GmbH filed Critical Primetals Technologies Germany GmbH
Priority to EP21180899.3A priority Critical patent/EP4110015A1/fr
Priority to PCT/EP2022/065633 priority patent/WO2022268511A1/fr
Priority to JP2023578992A priority patent/JP2024526164A/ja
Priority to MX2023014837A priority patent/MX2023014837A/es
Priority to EP22737558.1A priority patent/EP4360406A1/fr
Priority to BR112023024937A priority patent/BR112023024937A2/pt
Priority to US18/571,710 priority patent/US20240284566A1/en
Priority to CN202280044965.3A priority patent/CN117598028A/zh
Publication of EP4110015A1 publication Critical patent/EP4110015A1/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/18—Heating by arc discharge
    • H05B7/20—Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • 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
    • 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
    • F27D19/00—Arrangements of controlling devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/144—Power supplies specially adapted for heating by electric discharge; Automatic control of power, e.g. by positioning of electrodes
    • H05B7/148—Automatic control of power
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0034—Regulation through control of a heating quantity such as fuel, oxidant or intensity of current
    • F27D2019/0037—Quantity of electric current

Definitions

  • the present invention is also based on a control program for a control device of an arc furnace, the control program comprising machine code which can be processed by the control device, the processing of the machine code by the control device causing the control device to operate an arc furnace in accordance with such an operating method.
  • the present invention is also based on a control device for an arc furnace, the control device being programmed with such a control program so that the control device operates the arc furnace according to such an operating method.
  • the electrical energy is supplied to the electrodes of the electric arc furnace via a furnace transformer.
  • the furnace transformer is often connected to the supply network via a medium-voltage transformer.
  • the furnace transformer provides several voltage levels. For the range of constant power and other high-current ranges, the respective voltage level can be selected on the furnace transformer. Fine control within a specific voltage level can be done, for example, by means of impedance control.
  • the positioning of the electrodes is controlled mechanically, mostly via hydraulic adjustment devices.
  • the mechanical adjustment of the electrodes shows a significantly lower dynamic than the real behavior of the arcs.
  • the fluctuations can therefore only be adequately compensated.
  • the fluctuations lead to considerable loads on the components, for example the high-current cables, the current-carrying support arms, the hydraulic cylinders, etc.
  • the fluctuations occur both in the melting phase and in the flat bath phase.
  • the positioning of the electrodes must be continuously readjusted.
  • the readjustment can, for example, take place in such a way that a specific impedance or a specific power is controlled.
  • the dynamics of the positioning device are relatively low compared to the changes in the electrical system of the arc, certain fluctuations remain that cannot be corrected.
  • the fluctuations are increased by wave movements and currents of the molten steel. As a result, the energy input into the molten steel is not optimal.
  • the object of the present invention is to create possibilities by means of which a quick and high-quality regulation of the arcs is possible in a simple and reliable manner in the flat bath phase.
  • an operating method of the type mentioned at the outset is designed in that the control device determines the second control values during the flat bath phase either completely independently of the electrical parameters or only as a function of the electrical parameters if the control device detects the risk of arcing due to the electrical parameters and/or a short circuit.
  • the first control values are thus determined by the control device during the flat bath phase—as in the prior art—in such a way that the electrical parameters are approximated as closely as possible to the corresponding setpoint values.
  • the second control values are determined independently of the electrical parameters, except when there is a risk of special operating states, which must be avoided at all costs. As a result, the electrode voltages and the electrode currents are tracked exclusively by adapting the activation of the energy supply device.
  • the electrical characteristics of the electrical energy supplied to the electrodes can be determined as required.
  • the electrical parameters can be the electrode currents.
  • the active currents in particular come into consideration as electrode currents.
  • the electrical parameters can also be the reactive currents and/or the apparent currents.
  • the electrical parameters be the electrical power.
  • the active powers in particular come into consideration as powers. In individual cases, however, the electrical parameters can also be the reactive power and/or the apparent power.
  • the voltages applied to the electrodes and thus also the currents supplied to the electrodes are generally alternating quantities, ie alternating voltages and alternating currents.
  • Alternating variables can be characterized by their amplitude, their frequency and their shape during a period (e.g. sinusoidal, triangular, sawtooth, rectangular, etc.). The course over time is preferably sinusoidal.
  • the amplitude must always be set appropriately.
  • the frequency can be kept constant in some cases. In other cases, however, it is preferable for the control device to determine the first control values during the flat bath phase in such a way that, in order to approximate the electrical parameters to the corresponding setpoint values, a frequency of the electrode currents supplied to the electrodes and/or of the electrode voltages applied to the electrodes is also varied. This approach offers greater flexibility in optimizing the operation of the arc furnace.
  • the frequency of the electrode currents supplied to the electrodes and/or of the electrode voltages applied to the electrodes in the flat bath phase is preferably lower than a base frequency of the supply network. This procedure has proven to be particularly advantageous in tests.
  • the electrodes are spaced apart from the surface of the molten steel. Consequently, the arcs have a base length at the beginning of the flat bath phase.
  • the control device it is advantageous for the control device to move the electrodes towards the molten steel during the flat bath phase, so that the arcs only have a residual length after moving towards the molten steel have that is less than the base length.
  • the residual length is preferably at least 20% of the base length.
  • the base length can be determined or at least estimated using the electrical parameters as they exist at the beginning of the flat bath phase. It is possible that this determination/assessment is done intellectually by a person. However, it is preferably carried out by the control device.
  • control program with the features of claim 9.
  • the processing of the machine code by the control device causes the control device to operate an electric arc furnace in accordance with an operating method according to the invention.
  • control device having the features of claim 10.
  • the control device is programmed with a control program according to the invention, so that the control device operates the electric arc furnace according to an operating method according to the invention.
  • an arc furnace has a furnace vessel 1 .
  • the furnace vessel 1 can - see FIG 2 -
  • Steel-containing material 2 are supplied.
  • the steel-containing material 2 is fed to the furnace vessel 1 in a solid state.
  • the steel-containing material 2 can be scrap, for example.
  • the arc furnace also has an energy supply device 3 .
  • the energy supply device 3 is connected to a supply network 4 on the input side.
  • the supply network 4 is usually a medium-voltage network that has a nominal voltage in the 2-digit kV range and with a base frequency f0 (see 11 ) is operated.
  • the base frequency f0 is usually 50 Hz or 60 Hz.
  • the supply network 4 is as shown in FIG 1 usually a three-phase network.
  • the arc furnace also has a furnace transformer 5 and electrodes 6 .
  • the power supply device 3 is connected to the electrodes 6 via the furnace transformer 5 on the output side.
  • the furnace transformer 5 is also designed as a three-phase transformer.
  • other configurations are also possible, in particular a single-phase configuration. Irrespective of the specific configuration, however, the electrode voltages U applied to the electrodes 6 are significantly below the nominal voltage of the supply network 4.
  • the electrode voltage U is in FIG 1 only shown for one of the electrodes 6.
  • the electrode voltages U are usually in the range of several 100 V. In individual cases, voltages above 1 kV are also possible. However, 2 kV are generally not exceeded.
  • switching devices are also present, by means of which the energy supply device 3 can be separated from the supply network 4 .
  • switching devices can be present, by means of which the energy supply device 3 can be separated from the furnace transformer 5 and/or the furnace transformer 5 from the electrodes 6.
  • the switching devices perform purely binary switching operations, but no adjustment of voltages and currents.
  • active or passive filter devices can be arranged on the primary or secondary side of the furnace transformer 5 .
  • the switching devices and also the filter devices are of secondary importance for the functioning according to the invention and are therefore FIG 1 (and also the other FIGs) are not shown for the sake of clarity.
  • the energy supply device 3 can draw electrical energy from the supply network 4 and feed the drawn electrical energy to the electrodes 6 via the furnace transformer 5 .
  • the energy supply device 3 generally has a large number of semiconductor switches. Possible Configurations of the energy supply device 3 are in WO 2015/176 899 A1 ("gold standard") described. Alternatively, for example, the configurations according to EP 3 124 903 A1 or the EP 1 026 921 A1 be used. Irrespective of the specific configuration of the energy supply device 3, however, the energy supply device 3 is able on the output side - i.e. towards the furnace transformer 5 - to carry out a quasi-continuous gradation of the electrode voltages U applied to the electrodes 6 and/or the electrode currents I supplied to the electrodes 6. The electrode current I in is analogous to the representation for the electrode voltages U FIG 1 also only shown for one of the electrodes 6 .
  • the arc furnace has a control device 9 .
  • the energy supply device 3 and the positioning device 7 are controlled by the control device 9 .
  • the control device 9 thus generates first control values A1, with which it controls the energy supply device 3, and second control values A2, with which it controls the positioning device 7.
  • the energy supply device 3 and the positioning device 7 are operated in accordance with the respective control values A1, A2.
  • the control device 9 is designed as a software-programmable control device. This is in FIG 1 indicated by the specification " ⁇ P" (for microprocessor-controlled). The mode of action and operation of the control device 9 is thus determined by a control program 10 with which the control device 9 is programmed.
  • the control program 10 includes machine code 11 which can be processed by the control device 9 .
  • the processing of the machine code 11 by the control device 9 causes the control device 9 to operate the arc furnace according to an operating method, as is explained in more detail below in connection with the other FIGS.
  • Step S1 is therefore in 3 shown only as dashed lines.
  • the charging of the steel-containing material 2 is followed by a melting phase of the electric arc furnace.
  • the melting phase includes steps S2 to S4.
  • a flat bath phase follows the melting phase.
  • the shallow bath phase includes steps S5 through S7.
  • the control device 9 determines the first control values A1 for the energy supply device 3 and the second control values A2 for the positioning device 7 in step S2. The determination takes place according to FIG FIG 4 in corresponding determination blocks 12 and 13. In step S3, the control device 9 controls the energy supply device 3 and the positioning device 7 according to the determined control values A1, A2.
  • the first control values A1 are determined in such a way that the energy supply device 3 draws electrical energy from the supply network 4 on the basis of the corresponding control and via the furnace transformer 5 the Electrodes 6 supplies.
  • the second control values A2 are determined in such a way that the positioning device 7 positions the electrodes 6 relative to the steel-containing material 2 .
  • the determination of the first control values A1 and the second control values A2 by the control device 9 is coordinated with one another in such a way that arcs 14 (see Fig FIG 2 ) train.
  • the steel-containing material 2 is melted by the arcs 14 and gradually a molten steel 15 ( 5 ) generated.
  • the parameters U, I, P can be, for example, the electrode voltages U and/or the electrode currents I and/or values derived therefrom.
  • Another derived value can result from the time profile of electrode voltages U and electrode currents I.
  • Such values are, for example, the active current, the active power, the apparent power, the reactive current and the reactive power.
  • the parameters can be given or derived for the entirety of the electrodes 6 or individually for the respective electrode 6 .
  • the control device 9 uses the parameters U, I, P and the associated setpoint values U*, I*, P* to determine the first control values A1 and the second control values A2.
  • the determination takes place in both determination blocks 12, 13 in such a way that the electrical parameters U, I, P are approximated as closely as possible to the corresponding setpoint values U*, I*, P*.
  • This procedure and thus the implementation of step S2 is generally known to those skilled in the art. It therefore does not need to be explained in more detail.
  • step S4 the control device 9 checks whether the melting phase has ended.
  • the melting phase is complete when the molten steel 15, as shown in FIG 5 has completely or at least essentially formed a continuous horizontal surface. Either the steel-containing material 2 is completely melted or the elements of the steel-containing material 2 that have not yet melted are located completely under the surface of the steel melt 15 or the not yet melted elements of the steel-containing material 2 only protrude slightly above the surface of the steel melt 15 . Furthermore, a slag layer 16 may have formed on the surface of the molten steel 15 .
  • control device 9 It is possible for the control device 9 to evaluate measured actual variables of the electric arc furnace as part of the check as to whether the melting phase has ended. For example, it is possible for the control device 9 to evaluate the electrode currents I and/or the electrode voltages U, in particular their fluctuations. The control device 9 can also evaluate acoustic parameters of the arc furnace, for example the noise level or the acoustic spectrum of the noise generated. Alternatively, it is possible for an operator (not shown) to specify to the control device 9 that the melting phase has ended.
  • step S2 If the melting phase has not yet ended, the control device 9 goes back to step S2. On the other hand, when the melting phase has ended, the control device 9 goes to the flat bath phase and thus to step S5.
  • control device 9 determines the first control values A1 for the energy supply device 3 and the second control values A2 for the positioning device 7 in step S5. In step S6, the control device 9 controls the energy supply device 3 and the positioning device 7 according to the determined control values A1, A2 .
  • the first control values A1 are determined in such a way that the energy supply device 3 draws electrical energy from the supply network 4 on the basis of the corresponding control and feeds it to the electrodes 6 via the furnace transformer 5 .
  • the second control values A2 are determined in such a way that the positioning device 7 positions the electrodes 6 relative to the molten steel 15 .
  • the procedure for steps S5 and S6 corresponds to the procedure for steps S2 and S3.
  • steps S5 and S6 also corresponds to the procedure of steps S2 and S3 in that the first control values A1 and the second control values A2 are matched to one another in such a way that arcs 14 form.
  • the arcs 14 form in the flat bath phase as shown in FIG 5 between the electrodes 6 and the molten steel 15.
  • the molten steel 15 is further heated by the arcs 14 .
  • the controller 6 are according 6 the parameters U, I, P of the electrical energy supplied to the electrodes 6 and the associated setpoint variables U*, I*, P* are also supplied. However, the parameters U, I, P and the associated setpoint values U*, I*, P* are only supplied to the determination block 12 within the control device 9 . The control device 9 thus continues to determine the first control values A1 in such a way that the electrical parameters U, I, P correspond to the Target variables U*, I*, P* are approximated as closely as possible.
  • the determination block 13 is deactivated in the flat bath phase. Instead, according to 6 a determination block 17 activated.
  • the control device 9 uses the determination block 17 to determine the second control values A2 in the flat bath phase. In particular, it is possible for the control device 9 to set the second control values A2 in accordance with the representation in 3 determined completely independently of the electrical parameters U, I, P. In this case it is possible that the determination block 17 as shown in 6 the electrical parameters U, I, P are not supplied at all. Instead, the control device 9 can determine the second control values A2 on the basis of another internal determination or on the basis of external specifications V (for example specifications originating from an operator).
  • step S7 the control device 9 checks whether the flat bath phase has ended. It is possible for the control device 9 to evaluate measured actual variables of the electric arc furnace as part of the check as to whether the flat bath phase has ended. Alternatively, it is possible for the operator to specify to the control device 9 that the flat bath phase has ended.
  • step S8 the molten steel 15 produced is removed from the furnace body 1, for example poured into a ladle (not shown). This process can, but does not have to, take place under the control of the control device 9 .
  • Step S8 is therefore in 3 - analogous to step S1 - shown only in dashed lines.
  • step S8 With the execution of step S8, a complete cycle in the operation of the arc furnace is completed. A new cycle can therefore be started, beginning with step S1.
  • the second control values are determined, as already mentioned, independently of the electrical parameters U, I, P.
  • the second control values A2 from the determination block 17 are generally independent of the electrical parameters U, I, P can be determined, but can still be taken into account under special circumstances.
  • the determination block 17 as shown in FIG 7 the corresponding electrical parameters U, I, P are supplied. However, it is not necessary to also supply the corresponding setpoint values U*, I*, P*.
  • the determination block 17 (and, because the determination block 17 is part of the control device 9, therefore the control device 9 as a result) checks whether the electrical parameters U, I, P meet predetermined conditions or not. In particular, the determination block 17 checks in this case whether it recognizes the risk of an arc breaking and/or a short circuit based on the electrical parameters U, I, P. Only then does the determination block 17 take into account the electrical parameters U, I, P when determining the second control values A2. In this case, too, the consideration only takes place as long as there is a risk of arcing and/or a short circuit. If the danger no longer exists, the second control values A2 are determined again independently of the electrical parameters U, I, P. This is explained below in connection with 8 explained in more detail.
  • step S11 the control device 9 checks whether it recognizes the risk of an arc breaking. As part of the check in step S11, the control device 9 evaluates the electrical parameters U, I, P. If the control device 9 recognizes the risk of an arc breaking off, it goes to a step S12. In step S12, the control device 9 determines the first control values A1 and the second control values A2 such that the risk of the arc breaking is counteracted. For example, the control device 9 can vary the first control values A1 in such a way that the electrode voltages U are increased and the second control values A2 can be varied in such a way that the electrodes 6 are lowered in the direction of the molten steel 15 .
  • step S13 If the control device 9 does not recognize the risk of a short circuit in step S13, the control device 9 goes to step S5.
  • step S5 the first control values A1 and the second control values A2 are determined in the same way as was already done in connection with 6 was explained.
  • step S12 the control device 9 next moves to step S6, in which it controls the energy supply device 3 and the positioning device 4 according to the determined first and second control values A1 , drives A2. Then the controller proceeds to step S7. From there, either go to step S8 or the control device 9 goes back to step S11.
  • the parameters U, I, P can be selected in different ways. For example, as shown in 9 It is possible that - at least during the flat bath phase - the electrical parameters U, I, P are the electrode currents I. Alternatively, as shown in 10 It is possible that - at least during the flat bath phase - the electrical parameters U, I, P are the electrical power P.
  • the determination block 12 can be preceded by a supplementary block 18 .
  • the electrode voltages U and the electrode currents I can be supplied to the supplementary block 18 .
  • the supplementary block 18 determines, for example, the instantaneous power instantaneously or the average electrical power over a period of the electrode voltages U and outputs the determined value as an electrical parameter P to the determination block 12 .
  • control device 9 determines the first control values A1 during the flat bath phase in such a way that a frequency f of the electrode voltages U (or correspondingly a frequency f of the electrode currents I) is varied. this is in 11 indicated by the fact that a corresponding period T is varied. Varying the period T and the corresponding frequency f is in 11 indicated by a double arrow 19. It is done for the purpose of approximating the electrical parameters U, I, P to the corresponding setpoint values U*, I*, P*.
  • the base length L0 can become known to the control device 9 in various ways.
  • the base length L0 of the control device 9 can be specified by the operator.
  • the control device 9 as shown in 14 first executes a step S21 immediately after the step S4.
  • the control device 9 determines the base length L0 in step S21 using the electrical parameters U, I, P as they exist at the beginning of the flat bath phase. Appropriate procedures are known to those skilled in the art.
  • Step S21 if present, is executed only once. It is therefore not included in the loop of steps S5 to S7. This also applies in an analogous manner if steps S11 to S14 are present.
  • control device 9 determines the remaining length LR using the base length L0. Alternatively, it is possible for the control device 9 to determine only a minimum permissible value for the remaining length LR or for the control device 9 to provide a corresponding minimum permissible value for the Residual length LR is specified. In this case it is possible for the control device 9 to continue moving the electrodes 6 until the control device 9 recognizes optimized operation of the arc furnace based on an evaluation of the parameters U, I, P or the remaining length RL reaches the minimum permissible value.
  • the present invention has many advantages.
  • the mechanical load on the positioning device 7 can be reduced and the energy efficiency during operation of the electric arc furnace can also be improved.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
EP21180899.3A 2021-06-22 2021-06-22 Procédé de fonctionnement pour un four à arc Withdrawn EP4110015A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP21180899.3A EP4110015A1 (fr) 2021-06-22 2021-06-22 Procédé de fonctionnement pour un four à arc
PCT/EP2022/065633 WO2022268511A1 (fr) 2021-06-22 2022-06-09 Procédé de fonctionnement d'un four à arc électrique
JP2023578992A JP2024526164A (ja) 2021-06-22 2022-06-09 電気アーク炉のための動作方法
MX2023014837A MX2023014837A (es) 2021-06-22 2022-06-09 Metodo de funcionamiento de un horno de arco electrico.
EP22737558.1A EP4360406A1 (fr) 2021-06-22 2022-06-09 Procédé de fonctionnement d'un four à arc électrique
BR112023024937A BR112023024937A2 (pt) 2021-06-22 2022-06-09 Método de operação para uma fornalha de arco elétrico
US18/571,710 US20240284566A1 (en) 2021-06-22 2022-06-09 Operating method for an electric arc furnace
CN202280044965.3A CN117598028A (zh) 2021-06-22 2022-06-09 用于电弧炉的运行方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21180899.3A EP4110015A1 (fr) 2021-06-22 2021-06-22 Procédé de fonctionnement pour un four à arc

Publications (1)

Publication Number Publication Date
EP4110015A1 true EP4110015A1 (fr) 2022-12-28

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EP21180899.3A Withdrawn EP4110015A1 (fr) 2021-06-22 2021-06-22 Procédé de fonctionnement pour un four à arc
EP22737558.1A Pending EP4360406A1 (fr) 2021-06-22 2022-06-09 Procédé de fonctionnement d'un four à arc électrique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP22737558.1A Pending EP4360406A1 (fr) 2021-06-22 2022-06-09 Procédé de fonctionnement d'un four à arc électrique

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US (1) US20240284566A1 (fr)
EP (2) EP4110015A1 (fr)
JP (1) JP2024526164A (fr)
CN (1) CN117598028A (fr)
BR (1) BR112023024937A2 (fr)
MX (1) MX2023014837A (fr)
WO (1) WO2022268511A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4426067A1 (fr) * 2023-03-02 2024-09-04 GE Energy Power Conversion Technology Ltd Système d'alimentation électrique pour four à arc et four à arc et procédé associés
EP4436315A1 (fr) 2023-03-22 2024-09-25 Badische Stahl-Engineering GmbH Dispositif d'alimentation en courant pour un appareil métallurgique
WO2024194333A1 (fr) * 2023-03-20 2024-09-26 Sms Group S.P.A. Procédé de régulation d'un fonctionnement d'un four électrique et four électrique servant à la fusion d'un matériau de fusion

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115447A (en) * 1991-01-10 1992-05-19 Ucar Carbon Technology Corporation Arc furnace electrode control
EP1026921A1 (fr) 1995-10-26 2000-08-09 Inverpower Controls Ltd Contrôleur de ligne intelligent prévisionnel pour fours à arc
WO2015176899A1 (fr) 2014-05-19 2015-11-26 Siemens Aktiengesellschaft Alimentation en courant d'une charge non linéaire comprenant des convertisseurs matriciels multi-niveaux
EP3124903A1 (fr) 2015-07-30 2017-02-01 Danieli Automation SPA Appareil et procédé pour l'alimentation électrique d'un four à arc électrique
WO2019207611A1 (fr) * 2018-04-24 2019-10-31 Danieli Automation S.P.A. Procédé d'alimentation électrique pour un four électrique et appareil correspondant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115447A (en) * 1991-01-10 1992-05-19 Ucar Carbon Technology Corporation Arc furnace electrode control
EP1026921A1 (fr) 1995-10-26 2000-08-09 Inverpower Controls Ltd Contrôleur de ligne intelligent prévisionnel pour fours à arc
WO2015176899A1 (fr) 2014-05-19 2015-11-26 Siemens Aktiengesellschaft Alimentation en courant d'une charge non linéaire comprenant des convertisseurs matriciels multi-niveaux
EP3124903A1 (fr) 2015-07-30 2017-02-01 Danieli Automation SPA Appareil et procédé pour l'alimentation électrique d'un four à arc électrique
WO2019207611A1 (fr) * 2018-04-24 2019-10-31 Danieli Automation S.P.A. Procédé d'alimentation électrique pour un four électrique et appareil correspondant

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4426067A1 (fr) * 2023-03-02 2024-09-04 GE Energy Power Conversion Technology Ltd Système d'alimentation électrique pour four à arc et four à arc et procédé associés
WO2024194333A1 (fr) * 2023-03-20 2024-09-26 Sms Group S.P.A. Procédé de régulation d'un fonctionnement d'un four électrique et four électrique servant à la fusion d'un matériau de fusion
EP4436315A1 (fr) 2023-03-22 2024-09-25 Badische Stahl-Engineering GmbH Dispositif d'alimentation en courant pour un appareil métallurgique

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US20240284566A1 (en) 2024-08-22
WO2022268511A1 (fr) 2022-12-29
CN117598028A (zh) 2024-02-23
MX2023014837A (es) 2024-01-15
JP2024526164A (ja) 2024-07-17
BR112023024937A2 (pt) 2024-02-15

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