US3806622A - Arc furnace - Google Patents

Arc furnace Download PDF

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Publication number
US3806622A
US3806622A US00308711A US30871172A US3806622A US 3806622 A US3806622 A US 3806622A US 00308711 A US00308711 A US 00308711A US 30871172 A US30871172 A US 30871172A US 3806622 A US3806622 A US 3806622A
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US
United States
Prior art keywords
furnace
cover
vessel
electrodes
laterally
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 - Lifetime
Application number
US00308711A
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English (en)
Inventor
J Marchner
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ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3806622A publication Critical patent/US3806622A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • 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

Definitions

  • An arc furnace installation has furnace electrodes supported by electrode arms, the electrodes being vertically movably passed through a raisable and lowerable furnace cover on a laterally movable furnace vessel and their arms being vertically slidably applied to vertical pillars extending upwardly and the pillars having lower ends supported by supporting means positioned above and laterally free from the furnace vessel and its cover, leaving the space laterally aound the furnace vessel and its cover free from bulky equipment.
  • the electrode arms supporting the electrodes are often elements which are exposed to inductive heating and which are often bulky. Another inconvenience is the noise which often surrounds furnaces.
  • the invention is aimed at a solution to the problem, among other things, of reducing the bulk of the electrode arms and therefore their inductive heating, and reducing the radiation of the furnace operating noise, and it is characterized in that the electrode arms required to mount the electrodes are fixed to pillars which are attached to and drawn through said roof or upper supporting construction, and in that sound insulating screens are arranged at the sides of the furnace. These screens can suitably be lowered around the furnace vessel, and in this way sound insulation is obtained and simultaneously protection is provided against fumes forcing their way out of the furnace. In a preferred case, fume suction devices can be arranged around the lowered screens in the closed space (formed by the screens with other walls).
  • FIG. 1 shows a furnace with electrodes seen from the side, generally in vertical section indicated by the line 11 in FIG. 2, and FIG. 2 the same furnace seen from above, in cross section taken on the line 2-2 in FIG. 1.
  • FIG. 3 is a detailed view of the furnace space in cross section as indicated by the line 33 in FIG. 1.
  • FIGS. 1 and 2 show furnace electrodes 11-13 positioned at the corners of a triangle, suitably an equilateral triangle, and supported by electrode arms 15, 16, 17.
  • the electrodes are drawn or vertically movably passed through a raisable or lowerable furnace arch or cover 14.
  • the electrode arms are vertically slidably applied to pillars 18, 19, extending upwardly and having lower ends which are attached to the roof R above the furnace F or to an upper supporting construction arranged above the furnace. In this way, considerable space is savedat the sides of the furnace vessel 21, and the furnace can be moved laterially (after raising the electrodes) on its carriage 21a without the obstacles present in previous constructions.
  • the electrode arms must be rigid because the flexible suspension of the electrodes, known in the Tysland-Hole furnace, cannot be used here because of the electrodynamic forces during the scrap melting, and a stable electrode control is necessary for lifting the electrodes clear from the roof, which has been achieved through the invention.
  • the furnace cover 14 For charging the scrap the furnace cover 14 must be lifted I and the furnace vessel 21 laterally moved, on its carriage 21 a, until free from under the roof R.
  • the furnace For teeming through its spout 21b, only the electrodes must be removed, the furnace then tilting on its rocker beams 21c and rolling laterally.
  • the furnace is surrounded by the roof R, side walls SW and vertically adjustable screens 22, 23 applied in the vertically longitudinal direction, said screens being able to be lowered at or outside the furnace vessel and to define laterally a space around the furnace, which becomes heat and sound insulated. Fumes are also prevented from issuing out into the surrounding atmosphere.
  • furnace transformers 24 are arranged closed to the furnace and above the transformer power cables 25 which connect to electrode clamps (not shown) connecting with the electrodes, and these cables can easily be drawn through a partition wall of a transformer room TR above the roof R.
  • Conductors to the electrodes are arranged in a manner known per se from triangularly situated points in towards the electrodes, where they are connected and where the A connecton is arranged for three-phase alternating current connection.
  • the Tysland-Hole conductor arrangement is suitable although the flexible electrode mounting arrangement cannot be used with this invention.
  • the arms 15 to 17 must be rigid, being clearly shown by the drawings as cantilever arms sliding on the pillars 18 to 20 at one end and supporting an electrode weight by its other end, in each instance.
  • fume suction devices are arranged both from the furnace vessel 21, as shown at 26, and from the space around the furnace vessel, defined laterally by the screens 22, 23 and the side walls SW.
  • the fume suction device from the space around the furnace is shown at 27, and in this way a good working environment can be achieved for the furnace personnel, both with regard to air, sound and also layout (among other things through the electrode positioning).
  • the space can be defined upwards by the roof and laterally, in addition to the let-down screens 22 and 23 by the side walls SW.
  • Lifting cables 22a and 23a for the screens22 and 23 are indicated by broken lines in FIG. 1, and removable tubes T are shown for making additions to the furnace vessel 21 through its cover 14.
  • An arc furnace installation comprising a laterally movable furnace vessel having a raisable and lowerable furnace cover, arc electrodes vertically movably passed through said cover, electrode arms supporting said electrodes, pillars to which said arms are applied and are supported thereby for vertical movement, and means for supporting the lower ends of said pillars above and free from said laterally movable furnace vessel and furnace cover so that when said electrodes are drawn upwardly from said furnace cover said furnace can be moved laterally.
  • said pillar supporting means comprises a roof over said furnace cover and which with said screens and side walls defines a substantially enclosed space around said furnace vessel and cover.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
US00308711A 1971-12-01 1972-11-22 Arc furnace Expired - Lifetime US3806622A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7115361A SE377375B (enrdf_load_stackoverflow) 1971-12-01 1971-12-01

Publications (1)

Publication Number Publication Date
US3806622A true US3806622A (en) 1974-04-23

Family

ID=20300536

Family Applications (1)

Application Number Title Priority Date Filing Date
US00308711A Expired - Lifetime US3806622A (en) 1971-12-01 1972-11-22 Arc furnace

Country Status (6)

Country Link
US (1) US3806622A (enrdf_load_stackoverflow)
JP (1) JPS4865105A (enrdf_load_stackoverflow)
CA (1) CA992125A (enrdf_load_stackoverflow)
DE (1) DE2257807B2 (enrdf_load_stackoverflow)
GB (1) GB1403380A (enrdf_load_stackoverflow)
SE (1) SE377375B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913898A (en) * 1973-03-20 1975-10-21 Gutehoffnungshuette Sterkrade Steel producing plant with one or several electric arc furnaces
US4047555A (en) * 1975-09-23 1977-09-13 Vereinigte Edelstahlwerke Ag. (Vew) Method of and apparatus for positioning consumable electrodes in an electroslag remelting bath
US4117253A (en) * 1977-03-01 1978-09-26 Wooding Corporation High integrity atmosphere control of electroslag melting
FR2408105A1 (fr) * 1977-11-04 1979-06-01 Sharkey Metals Ltd Four pour la fusion de metaux
EP0132876A1 (en) 1983-07-27 1985-02-13 DANECO-DANIELI ECOLOGIA Spa Improvements to hoods for aspiration of secondary fumes in steel mills and foundries
DE3505816A1 (de) * 1985-02-20 1986-08-21 Leybold-Heraeus GmbH, 5000 Köln Metallurgische anlage mit einem portalaehnlichen gestell
US4753192A (en) * 1987-01-08 1988-06-28 Btu Engineering Corporation Movable core fast cool-down furnace
US6758015B2 (en) 2002-03-26 2004-07-06 Daryl D. Clasen Modular roof equipment screening assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2159286A (en) * 1935-09-25 1939-05-23 Pittsburgh Res Corp Reduction furnace
US3129274A (en) * 1961-03-29 1964-04-14 Wargons Ab Reduction furnace provided with superstructure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2159286A (en) * 1935-09-25 1939-05-23 Pittsburgh Res Corp Reduction furnace
US3129274A (en) * 1961-03-29 1964-04-14 Wargons Ab Reduction furnace provided with superstructure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913898A (en) * 1973-03-20 1975-10-21 Gutehoffnungshuette Sterkrade Steel producing plant with one or several electric arc furnaces
US4047555A (en) * 1975-09-23 1977-09-13 Vereinigte Edelstahlwerke Ag. (Vew) Method of and apparatus for positioning consumable electrodes in an electroslag remelting bath
US4117253A (en) * 1977-03-01 1978-09-26 Wooding Corporation High integrity atmosphere control of electroslag melting
FR2408105A1 (fr) * 1977-11-04 1979-06-01 Sharkey Metals Ltd Four pour la fusion de metaux
EP0132876A1 (en) 1983-07-27 1985-02-13 DANECO-DANIELI ECOLOGIA Spa Improvements to hoods for aspiration of secondary fumes in steel mills and foundries
DE3505816A1 (de) * 1985-02-20 1986-08-21 Leybold-Heraeus GmbH, 5000 Köln Metallurgische anlage mit einem portalaehnlichen gestell
US4753192A (en) * 1987-01-08 1988-06-28 Btu Engineering Corporation Movable core fast cool-down furnace
US6758015B2 (en) 2002-03-26 2004-07-06 Daryl D. Clasen Modular roof equipment screening assembly

Also Published As

Publication number Publication date
SE377375B (enrdf_load_stackoverflow) 1975-06-30
CA992125A (en) 1976-06-29
JPS4865105A (enrdf_load_stackoverflow) 1973-09-08
GB1403380A (en) 1975-08-28
DE2257807B2 (de) 1977-10-20
DE2257807A1 (de) 1973-06-07

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