EP4227624A1 - 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
EP4227624A1
EP4227624A1 EP22156809.0A EP22156809A EP4227624A1 EP 4227624 A1 EP4227624 A1 EP 4227624A1 EP 22156809 A EP22156809 A EP 22156809A EP 4227624 A1 EP4227624 A1 EP 4227624A1
Authority
EP
European Patent Office
Prior art keywords
phase
arc furnace
furnace
control device
electrodes
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.)
Pending
Application number
EP22156809.0A
Other languages
German (de)
English (en)
Inventor
Thomas Matschullat
Günther Winter
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 EP22156809.0A priority Critical patent/EP4227624A1/fr
Publication of EP4227624A1 publication Critical patent/EP4227624A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
    • 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
    • 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
    • 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
    • C21C2300/00—Process aspects
    • C21C2300/06—Modeling of the process, e.g. for control purposes; CII

Definitions

  • the present invention is based on an operating method for an arc furnace, wherein an energy supply device of the arc furnace between charging a furnace vessel of the arc furnace with metal in the solid aggregate state and removing a molten metal from the furnace vessel during several successive process phases from a supply network operated at a mains frequency electrical energy applies and supplies the electrical energy drawn via a furnace transformer with an operating frequency to electrodes of the arc furnace, so that arcs form between the electrodes and the metal or molten metal.
  • 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. As a result, the energy input into the molten metal is not optimal.
  • control program with the features of claim 6.
  • the processing of the machine code by the control device causes the arc furnace to be operated according to an operating method according to the invention.
  • the arc furnace is operated in several process phases, each of which is assigned an index i.
  • this is followed by charging the furnace vessel 1 with the metal 2 (the corresponding state is shown schematically in FIG 2 shown) indicates a melting phase of the arc furnace.
  • the melting phase During the melting phase, the metal 2 is melted into the molten metal 13 .
  • the melting phase in turn, may comprise an initial phase and a final phase.
  • the melting phase is followed by a flat bath phase ( FIG 4 ).
  • the molten metal 12 is further heated during the flat bath phase.
  • the process phases can be the melt phase and the flat bath phase. In this case, the index can take the values 1 and 2 for the melting phase and the flat bath phase.
  • the power P* to be introduced into the metal 2 or the molten metal 13 is also set as a function of the time t, specifically as a function of the process phase or the index i.
  • 6 shows the preferred embodiment according to which the power P* to be introduced during the initial phase of the melting phase has a relatively low value, has a relatively high value during the final phase of the melting phase, and has a value during the shallow bath phase between the value of the initial phase and the final phase of the melting phase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP22156809.0A 2022-02-15 2022-02-15 Procédé de fonctionnement pour un four à arc Pending EP4227624A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22156809.0A EP4227624A1 (fr) 2022-02-15 2022-02-15 Procédé de fonctionnement pour un four à arc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22156809.0A EP4227624A1 (fr) 2022-02-15 2022-02-15 Procédé de fonctionnement pour un four à arc

Publications (1)

Publication Number Publication Date
EP4227624A1 true EP4227624A1 (fr) 2023-08-16

Family

ID=80595095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22156809.0A Pending EP4227624A1 (fr) 2022-02-15 2022-02-15 Procédé de fonctionnement pour un four à arc

Country Status (1)

Country Link
EP (1) EP4227624A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0878156A (ja) * 1994-09-02 1996-03-22 Daido Steel Co Ltd 交流ア−ク炉
EP1026921A1 (fr) 1995-10-26 2000-08-09 Inverpower Controls Ltd Contrôleur de ligne intelligent prévisionnel pour fours à arc
DE102008006966A1 (de) * 2008-01-31 2009-08-06 Siemens Aktiengesellschaft Verfahren zur Ermittlung eines Stückigkeitsmaßes für Feststoff in einem Lichtbogenofen, einen Lichtbogenofen, eine Signalverarbeitungseinrichtung sowie Programmcode und ein Speichermedium
DE102008006958A1 (de) * 2008-01-31 2009-08-06 Siemens Aktiengesellschaft Verfahren zum Betreiben eines Lichtbogenofens mit wenigstens einer Elektrode, Regel- und/oder Steuerungseinrichtung, Maschinenlesbarer Programmcode, Datenträger und Lichtbogenofen zur Durchführung des Verfahrns
DE102014206008A1 (de) * 2014-03-31 2015-10-01 Siemens Aktiengesellschaft Vorrichtung und Verfahren zur dynamischen Einstellung eines Elektrolichtbogenofens
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
WO2021115573A1 (fr) * 2019-12-10 2021-06-17 Siemens Aktiengesellschaft Four à arc électrique et procédé pour le fonctionnement d'un four à arc électrique
WO2021130791A1 (fr) * 2019-12-23 2021-07-01 Danieli & C. Officine Meccaniche S.P.A. Procédé de fusion en four à arc électrique et appareil de fusion associé

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0878156A (ja) * 1994-09-02 1996-03-22 Daido Steel Co Ltd 交流ア−ク炉
EP1026921A1 (fr) 1995-10-26 2000-08-09 Inverpower Controls Ltd Contrôleur de ligne intelligent prévisionnel pour fours à arc
DE102008006966A1 (de) * 2008-01-31 2009-08-06 Siemens Aktiengesellschaft Verfahren zur Ermittlung eines Stückigkeitsmaßes für Feststoff in einem Lichtbogenofen, einen Lichtbogenofen, eine Signalverarbeitungseinrichtung sowie Programmcode und ein Speichermedium
DE102008006958A1 (de) * 2008-01-31 2009-08-06 Siemens Aktiengesellschaft Verfahren zum Betreiben eines Lichtbogenofens mit wenigstens einer Elektrode, Regel- und/oder Steuerungseinrichtung, Maschinenlesbarer Programmcode, Datenträger und Lichtbogenofen zur Durchführung des Verfahrns
DE102014206008A1 (de) * 2014-03-31 2015-10-01 Siemens Aktiengesellschaft Vorrichtung und Verfahren zur dynamischen Einstellung eines Elektrolichtbogenofens
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
WO2021115573A1 (fr) * 2019-12-10 2021-06-17 Siemens Aktiengesellschaft Four à arc électrique et procédé pour le fonctionnement d'un four à arc électrique
WO2021130791A1 (fr) * 2019-12-23 2021-07-01 Danieli & C. Officine Meccaniche S.P.A. Procédé de fusion en four à arc électrique et appareil de fusion associé

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