GB1282921A - Heating method for direct-arc furnace - Google Patents

Heating method for direct-arc furnace

Info

Publication number
GB1282921A
GB1282921A GB3854469A GB3854469A GB1282921A GB 1282921 A GB1282921 A GB 1282921A GB 3854469 A GB3854469 A GB 3854469A GB 3854469 A GB3854469 A GB 3854469A GB 1282921 A GB1282921 A GB 1282921A
Authority
GB
United Kingdom
Prior art keywords
furnace
lowered
electrodes
circle
diameter
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.)
Expired
Application number
GB3854469A
Inventor
Shozo Yasukawa
Masayuki Aoshika
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Priority to GB3854469A priority Critical patent/GB1282921A/en
Publication of GB1282921A publication Critical patent/GB1282921A/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Furnace Details (AREA)

Abstract

1282921 Direct arc furnaces ISHIKAWAJIMA-HARIMA JUKOGYO KK 31 July 1969 38544/69 Heading H5H A three-phase A.C. direct arc furnace has electrode-supporting masts 4, 5, located on the same side of the furnace and obliquely extending electrodes 2, 3, arranged so that their tips are spaced around a circle of diameter D in the upper part of the furnace but move closer to a circle of diameter d when lowered to the position for melting metal scrap 7 close to the surface of the bath 8 of melted charge. The circles D, d, may be coaxial or otherwise. The secondary conductors, comprising flexible cables and bushes upon the electrode supporting arms 2<SP>1</SP>, 3<SP>1</SP>, have correspondingly larger mutual distances with the electrodes 2, 3 in their raised positions than with the electrodes lowered, giving high and low furnace circuit impedances respectively to help stabilize the arcs, give uniform melting and prevent flicker in the raised position, and to increase the rapidity of heating in the lowered position, without excessive breakage of the furnace wall refractory lining by hot spot phenomenon.
GB3854469A 1969-07-31 1969-07-31 Heating method for direct-arc furnace Expired GB1282921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3854469A GB1282921A (en) 1969-07-31 1969-07-31 Heating method for direct-arc furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3854469A GB1282921A (en) 1969-07-31 1969-07-31 Heating method for direct-arc furnace

Publications (1)

Publication Number Publication Date
GB1282921A true GB1282921A (en) 1972-07-26

Family

ID=10404160

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3854469A Expired GB1282921A (en) 1969-07-31 1969-07-31 Heating method for direct-arc furnace

Country Status (1)

Country Link
GB (1) GB1282921A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee