ZA924133B - Process and apparatus to melt down scrap metal in a direct current arc furnace - Google Patents

Process and apparatus to melt down scrap metal in a direct current arc furnace

Info

Publication number
ZA924133B
ZA924133B ZA924133A ZA924133A ZA924133B ZA 924133 B ZA924133 B ZA 924133B ZA 924133 A ZA924133 A ZA 924133A ZA 924133 A ZA924133 A ZA 924133A ZA 924133 B ZA924133 B ZA 924133B
Authority
ZA
South Africa
Prior art keywords
current
direct current
scrap metal
melt
arc furnace
Prior art date
Application number
ZA924133A
Inventor
Eckart Schunk
Original Assignee
Mannesmann Ag
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 Mannesmann Ag filed Critical Mannesmann Ag
Publication of ZA924133B publication Critical patent/ZA924133B/en

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
    • 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
    • C21C5/5229—Manufacture of steel in electric furnaces in a direct current [DC] 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
    • 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
    • H05B7/11—Arrangements for conducting current to the electrode terminals
    • 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
    • Y02P10/20—Recycling
    • 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)
  • Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)
  • Furnace Details (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

A process is disclosed for melting scrap metal. Threephase current is rectified to direct current by thyristors and is led through a cathode, through the material contained in a metallurgical vessel and through a bottom electrode designed as an anode. In order to actively influence the combustion by the electric arc and to attain the metallurgically highest possible power input by simple means, the power current is led through a group of at least two thyristors controlled by individually adjustable control currents; the negatively polarized power current is fed back to the melt by a common electrode and the positively polarized power current is independently fed back to the melt from the bottom of the vessel through at least two anodes.
ZA924133A 1991-06-06 1992-06-05 Process and apparatus to melt down scrap metal in a direct current arc furnace ZA924133B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914118756 DE4118756C2 (en) 1991-06-06 1991-06-06 DC arc furnace

Publications (1)

Publication Number Publication Date
ZA924133B true ZA924133B (en) 1993-03-31

Family

ID=6433420

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA924133A ZA924133B (en) 1991-06-06 1992-06-05 Process and apparatus to melt down scrap metal in a direct current arc furnace

Country Status (5)

Country Link
EP (1) EP0587651B1 (en)
AT (1) ATE134817T1 (en)
DE (1) DE4118756C2 (en)
WO (1) WO1992022181A1 (en)
ZA (1) ZA924133B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4733137A (en) * 1986-03-14 1988-03-22 Walker Magnetics Group, Inc. Ion nitriding power supply
ATE170357T1 (en) * 1992-07-31 1998-09-15 Danieli Off Mecc DC ARC FURNACE WITH ARC DEFLECTION CONTROL
DE4240891C2 (en) * 1992-12-04 1995-11-16 Voest Alpine Ind Anlagen DC arc furnace and method for operating it
FR2704710B1 (en) * 1993-04-30 1995-06-23 Cegelec Metals Systems Improved power converter device for supplying direct current to an electric arc furnace.
FR2704709B1 (en) * 1993-04-30 1995-06-23 Cegelec Metals Systems Power converter device for direct current supply to an electric arc furnace.
JP3456066B2 (en) * 1995-09-19 2003-10-14 三菱電機株式会社 Arc control device
RU2089803C1 (en) * 1996-02-21 1997-09-10 Сергей Маркович Нехамин Automated electric furnace unit
DE19920049C2 (en) * 1999-04-23 2001-10-11 Sms Demag Ag Method and device for the power supply of a melting unit operated via an arc
BRPI0515356B1 (en) 2004-09-01 2017-10-10 Hatch Ltd. "ELECTRIC OVEN AND METHOD FOR OPERATING AN ELECTRIC OVEN"
CN110247562A (en) * 2019-06-14 2019-09-17 中冶赛迪工程技术股份有限公司 A kind of power supply unit and method of supplying power to of direct current electric arc furnace

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1488877A (en) * 1974-03-12 1977-10-12 British Steel Corp Arc furnaces
DE3007879A1 (en) * 1979-03-12 1980-09-25 Asea Ab ARC OVEN SUPPLIED WITH DC CURRENT
SE437206B (en) * 1981-02-26 1985-02-11 Asea Ab DC arc furnace
FR2588432B1 (en) * 1985-10-04 1987-11-27 Jeumont Schneider DEVICE FOR SUPPLYING DIRECT CURRENT TO AT LEAST TWO ELECTRIC CHARGES HAVING A COMMON POLARITY, PARTICULARLY FOR SUPPLYING MULTIPLE ELECTRIC ARCS
FR2602351B1 (en) * 1986-08-01 1988-09-09 Clecim Sa PROCESS FOR STABILIZING ELECTRIC ARCS IN A SCRAP FUSION OVEN AND IMPROVED OVEN FOR IMPLEMENTING THE PROCESS
FR2602318B1 (en) * 1986-08-01 1988-11-10 Clecim Sa ARC FURNACE SUPPLIED FROM A DIRECT CURRENT SOURCE FOR CONTINUOUS SCRAP FUSION
US5138630A (en) * 1989-11-06 1992-08-11 Nkk Corporation Direct current electric arc furnace
EP0474883B2 (en) * 1990-03-19 2003-01-02 Kawasaki Steel Corporation Dc electric furnace for melting metal

Also Published As

Publication number Publication date
DE4118756A1 (en) 1992-12-10
DE4118756C2 (en) 1995-11-30
EP0587651A1 (en) 1994-03-23
EP0587651B1 (en) 1996-02-28
WO1992022181A1 (en) 1992-12-10
ATE134817T1 (en) 1996-03-15

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