CA2030686A1 - Direct-arc electric furnace fed with controlled current and method to feed a direct-arc furnace with controlled current - Google Patents

Direct-arc electric furnace fed with controlled current and method to feed a direct-arc furnace with controlled current

Info

Publication number
CA2030686A1
CA2030686A1 CA2030686A CA2030686A CA2030686A1 CA 2030686 A1 CA2030686 A1 CA 2030686A1 CA 2030686 A CA2030686 A CA 2030686A CA 2030686 A CA2030686 A CA 2030686A CA 2030686 A1 CA2030686 A1 CA 2030686A1
Authority
CA
Canada
Prior art keywords
arc
furnace
direct
controlled current
feed
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.)
Granted
Application number
CA2030686A
Other languages
French (fr)
Other versions
CA2030686C (en
Inventor
Gianni Gensini
Luciano Morello
Giovanni Coassin
Riccardo Fragiacomo
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.)
Danieli and C Officine Meccaniche SpA
Original Assignee
Danieli and C Officine Meccaniche SpA
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
Priority claimed from IT08352089A external-priority patent/IT1236363B/en
Application filed by Danieli and C Officine Meccaniche SpA filed Critical Danieli and C Officine Meccaniche SpA
Publication of CA2030686A1 publication Critical patent/CA2030686A1/en
Application granted granted Critical
Publication of CA2030686C publication Critical patent/CA2030686C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H05B7/156—Automatic control of power by hydraulic or pneumatic means for positioning of electrodes
    • 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
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

Method to feed a three-phase direct-arc electric furnace with controlled current and also a three-phase electric furnace thus fed for the smelting of metals and advantageously but not essentially for iron-based alloys, the furnace comprising means (GI) for regulation of the length of the arc by means of action on the height of the electrodes, the mains supply of the furnace including at least one medium voltage line and a transformer to serve the arc furnace, an element to regulate the arc current being comprised in each phase in the segment connecting the medium voltage line and the transformer and consisting of at least one inductor (L1), a thyristor-controlled valve (T) or alternatively a regulation element consisting of a saturable reactor being included in parallel with at least part of the inductor, one or the other of these regulation elements cooperating with a device (S1) to measure the intensity of the arc current and with an assembly (GC) that controls the arc current of the furnace by means of action on the overall value of the equivalent series reactance.
CA002030686A 1989-11-30 1990-11-23 Direct-arc electric furnace fed with controlled current and method to feed a direct-arc furnace with controlled current Expired - Fee Related CA2030686C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT83520A/89 1989-11-30
IT08352089A IT1236363B (en) 1989-11-30 1989-11-30 DIRECT CURRENT ELECTRIC ARC OVEN AND CONTROLLED CURRENT SUPPLY PROCEDURE OF A DIRECT ARC ARC OVEN
EP90116833.6 1990-09-03
EP90116833A EP0429774A1 (en) 1989-11-30 1990-09-03 Direct-arc electric furnace fed with controlled current and method to feed a direct-arc furnace with controlled current

Publications (2)

Publication Number Publication Date
CA2030686A1 true CA2030686A1 (en) 1991-05-31
CA2030686C CA2030686C (en) 1999-10-05

Family

ID=26125444

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002030686A Expired - Fee Related CA2030686C (en) 1989-11-30 1990-11-23 Direct-arc electric furnace fed with controlled current and method to feed a direct-arc furnace with controlled current

Country Status (4)

Country Link
CN (2) CN1057658C (en)
AU (1) AU641195B2 (en)
BR (1) BR9006066A (en)
CA (1) CA2030686C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109000481A (en) * 2018-09-21 2018-12-14 大连重工机电设备成套有限公司 A kind of variable dc circuit In The Sub-mergedfurnace of The Ferroalloys

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501025C2 (en) * 1993-03-18 1994-10-24 Asea Brown Boveri Oven
CN100370819C (en) * 2000-03-14 2008-02-20 汤姆森特许公司 System and method for providing recording functionality when program information is not available
US11122654B2 (en) 2015-06-05 2021-09-14 Hatch Ltd. Flicker control for electric arc furnace
CN105158540B (en) * 2015-08-11 2018-04-24 南京师范大学 A kind of arc current evaluation method using electric arc inductance correction factor
CN106931796B (en) * 2017-03-14 2019-01-22 四方继保（武汉）软件有限公司 Based on the electrodes in mine hot stove control method for calculating electrode payload resistance in furnace
IT201800004847A1 (en) * 2018-04-24 2019-10-24 METHOD OF MELTING IN AN ELECTRIC ARC OVEN AND RELATED EQUIPMENT
CN111864735B (en) * 2020-07-22 2024-04-16 安徽交通职业技术学院 Switching compensation system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632862A (en) * 1950-05-02 1953-03-24 Westinghouse Electric Corp Regulating system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109000481A (en) * 2018-09-21 2018-12-14 大连重工机电设备成套有限公司 A kind of variable dc circuit In The Sub-mergedfurnace of The Ferroalloys
CN109000481B (en) * 2018-09-21 2023-07-25 大连重工机电设备成套有限公司 Variable direct current flows back to Lu Tiege gold ore deposit hot stove

Also Published As

Publication number Publication date
BR9006066A (en) 1991-09-24
AU641195B2 (en) 1993-09-16
CA2030686C (en) 1999-10-05
CN1052585A (en) 1991-06-26
AU6696590A (en) 1991-06-06
CN1290118A (en) 2001-04-04
CN1057658C (en) 2000-10-18

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed