EP0594272B1 - Bras de support pour électrode d'un four à arc électrique - Google Patents

Bras de support pour électrode d'un four à arc électrique Download PDF

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Publication number
EP0594272B1
EP0594272B1 EP93250271A EP93250271A EP0594272B1 EP 0594272 B1 EP0594272 B1 EP 0594272B1 EP 93250271 A EP93250271 A EP 93250271A EP 93250271 A EP93250271 A EP 93250271A EP 0594272 B1 EP0594272 B1 EP 0594272B1
Authority
EP
European Patent Office
Prior art keywords
supporting arm
electrode
electrode supporting
channels
walls
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
EP93250271A
Other languages
German (de)
English (en)
Other versions
EP0594272A1 (fr
EP0594272B2 (fr
Inventor
Lutz Becker
Andreas Schüring
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.)
SMS Siemag AG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6471405&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0594272(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0594272A1 publication Critical patent/EP0594272A1/fr
Publication of EP0594272B1 publication Critical patent/EP0594272B1/fr
Application granted granted Critical
Publication of EP0594272B2 publication Critical patent/EP0594272B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes
    • H05B7/101—Mountings, supports or terminals at head of electrode, i.e. at the end remote from the arc
    • 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
    • H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes

Definitions

  • the invention relates to an electrode support arm for arc furnaces for attaching an electrode support device in its front part, which is designed as a hollow profile with a wall formed at least partially from current-carrying material of high conductivity.
  • Electrodes for arc furnaces for steel production are usually attached to support arms by means of electrode clamps, which in turn are held on vertically movable support columns.
  • the power supply takes place either in power pipes guided above the support arm or above the support arms themselves.
  • the current is conducted with copper or aluminum plated on the outside.
  • the support arm can also consist entirely of a material that conducts the current well.
  • a support arm which is made of aluminum and carries current in its entirety, is known. Because of the low current load, the support arm, which is designed as a hollow profile, is itself uncooled. The cooling water supply required for the electrode clamp is splinted over pipes that are led through the interior of the hollow profile.
  • the cooling of the electrode holder is complex.
  • the cooling potential of the cooling medium is not sufficiently exploited in the cooled support arm design.
  • the invention therefore has set itself the goal of avoiding the disadvantages mentioned and of creating a structurally simple, low-weight and at the same time structurally rigid support arm with which low-maintenance, high electrical outputs can be transmitted.
  • its wall consists of profiles in which channels arranged parallel to one another are introduced. At the head and foot ends of the channels, two ends are connected to one another, so that an arbitrarily configurable cooling water circulation system is created.
  • the thickness of the wall is selected so that the support arm designed as a hollow profile is sufficiently stiff and at the same time the entire wall is cooled without risk.
  • the hollow profile can have a circular, oval or box-like shape.
  • the box-like shape is preferred, the wall consists of two L-profiles of the same size or of four flat profiles welded together at the corners.
  • the support arm according to the invention is significantly lighter than previously known support arms of comparable sizes. On the one hand, this is due to the use of the wall provided with channels, so that the arm's own weight is lower with comparatively stiffness. On the other hand, however, less water is used overall, since significantly less water is directed through the channels through the support arm designed as a closed coolant circuit.
  • the support arm according to the invention has an outer simple shape, in which no components protrude outwards and are therefore exposed to possible damage.
  • the simple shape allows easy attachment of the electrode support device in the front part of the support arm. This ensures an easy change.
  • the middle support arm is bent in its central section and guided above the other electrode arms.
  • FIG. 1 shows an arc furnace (10) with an furnace vessel (11) which is closed with a lid (12).
  • the furnace (11) contains melt (13) and slag (14).
  • Electrodes (21-23) protrude through the cover (12) into the furnace vessel (11) and are attached to an electrode arm (24) or to individual electrode arms (25-27) of an electrode carrier device (20).
  • the middle electrode support arm When using three electrode support arms (25-27), the middle electrode support arm has a kink (28) which is intimately connected to horizontal electrode support parts (29).
  • the length of the middle electrode support arm (25) is labeled “L”. This length "L” has a kink length "l” in the central area, this part of the electrode support arm being arranged at a kink angle ( ⁇ ) to the horizontal electrode support part (29).
  • FIG. 2 shows hollow profiles (30) of the electrode support arm with components (31). These components (31) are extruded and have channels (36) in the longitudinal direction, the number and dimensions of which are designed such that adequate cooling can be achieved without reducing the strength of the support arm.
  • the hollow profile is advantageously assembled from at least two extruded components by welding. These components can be designed as an oval profile (34) ⁇ Figure 2.3> or as an L-profile (33) ⁇ Figure 2.2>. However, as shown in FIG. 2.1, they can also be assembled from identical flat profiles (32) which are welded together at 4 seams.
  • flanges or lids are attached, through which parallel channels are connected to one another, and thus enable a defined coolant flow.
  • FIG. 3 shows individual current threads of the coolant of a coolant control system (40).
  • the individual channels (36) form the coolant thread (46), which flows through most of the support arm.
  • the electrode holder (27) has the coolant threads (47 and 48) that are supplied by the coolant threads (49). Due to the large number of channels, a wide variety of coolant channels can be displayed.
  • the possibility of cooling a spray ring (41) is shown in the lower part of the picture, from which the water can flow freely, which is fed to it via the coolant thread (42).

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Discharge Heating (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Claims (7)

  1. Bras de support d'électrode pour four à arc électrique, pour installer un dispositif de support d'électrode dans sa partie avant, qui est réalisé comme profilé creux avec une paroi formée au moins en partie d'une matière conductrice du courant de conductibilité élevée,
    caractérisé en ce que la paroi (35) du profilé creux (30) présente un système de guidage d'un fluide de refroidissement (40), des canaux (36) agencés parallèlement les uns aux autres et parallèlement à l'axe central du bras du support étant prévus dans la paroi (35) en un nombre et une dimension qui permettent un refroidissement suffisant sans diminuer la résistance mécanique du bras de support.
  2. Bras de support d'électrode selon la revendication 1,
    caractérisé en ce que les canaux (36) présentent un diamètre d qui, par rapport à l'épaisseur D de la paroi (35), est dans le rapport de d:D = 1:1,5-2,5, et en ce que les canaux (36) sont écartés l'un de l'autre d'une distance a = 1-1,5 D et sont reliés l'un à l'autre par paire, pour l'écoulement, aussi bien à l'extrémité de tête qu'à l'extrémité de pied, en formant généralement un circuit de fluide de refroidissement fermé.
  3. Bras de support d'électrode selon la revendication 1,
    caractérisé en ce que le profilé creux (30) est réalisé sous forme de caisson ayant une paroi (35) réunie à partir d'au moins deux éléments constructifs (31).
  4. Bras de support d'électrode selon la revendication 3,
    caractérisé en ce que les éléments constructifs (31) sont constitués de profilés en aluminium (32-34) de construction identique extrudés, lesquels sont reliés intimement l'un à l'autre par soudage.
  5. Bras de support d'électrode selon la revendication 4,
    caractérisé en ce que les éléments constructifs (31) présentent la forme d'un L.
  6. Bras de support d'électrode selon la revendication 1,
    caractérisé en ce que des canaux choisis (36) pour le refroidissement du support d'électrode (27) sont reliés, pour l'écoulement, à des amenées (49) et évacuations (45) du système de guidage du fluide de refroidissement (40).
  7. Bras de support d'électrode selon la revendication 1,
    caractérisé en ce que, dans le cas de l'utilisation de trois électrodes (21-23), le bras de support d'électrode (25) de l'électrode médiane (22) possède, dans son tronçon central, un coude (28) qui, pour une longueur 1 par rapport à la longueur du bras de support d'électrode L dans le rapport l:L = 1:3-4, s'éloigne du récipient de four (11) sous un angle α entre 50-70° par rapport à l'horizontale.
EP93250271A 1992-10-20 1993-10-06 Bras de support pour électrode d'un four à arc électrique Expired - Lifetime EP0594272B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4236158A DE4236158C1 (de) 1992-10-20 1992-10-20 Elektrodentragarm für Lichtbogenöfen
DE4236158 1992-10-20

Publications (3)

Publication Number Publication Date
EP0594272A1 EP0594272A1 (fr) 1994-04-27
EP0594272B1 true EP0594272B1 (fr) 1997-09-03
EP0594272B2 EP0594272B2 (fr) 2005-06-22

Family

ID=6471405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93250271A Expired - Lifetime EP0594272B2 (fr) 1992-10-20 1993-10-06 Bras de support pour électrode d'un four à arc électrique

Country Status (10)

Country Link
US (1) US5471496A (fr)
EP (1) EP0594272B2 (fr)
JP (1) JP3300720B2 (fr)
KR (1) KR100259014B1 (fr)
AT (1) ATE157839T1 (fr)
BR (1) BR9301181A (fr)
DE (2) DE4236158C1 (fr)
ES (1) ES2106269T3 (fr)
GB (1) GB2271836B (fr)
SG (1) SG52327A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324595B (en) * 1997-04-22 1999-03-10 Howard Ind Pipework Services L Economiser for electric arc furnace
US6377604B1 (en) * 2000-11-09 2002-04-23 Dixie Arc, Inc. Current-conducting arm for an electric arc furnace
DE102006027648A1 (de) * 2006-06-13 2007-12-20 Arndt Dung Wandungselemente für einen wassergekühlten, stromführenden Elektrodentragarm und aus solchen Wandungselementen bestehende Elektrodentragarme
EP1901585B1 (fr) * 2006-09-18 2012-08-29 Homa Gesellschaft f. Hochstrom- Magnetschalter v. Vollenbroich GmbH & Co. KG Support de bras pour four à arc
US20090044568A1 (en) * 2007-08-15 2009-02-19 Albert Lewis Submerged fired vertical furnance
JP4533986B2 (ja) * 2008-09-17 2010-09-01 有限会社 ベイテック 電極支持アームにおける冷却構造
DE102009034407A1 (de) 2009-07-23 2011-02-03 Fuchs Technology Holding Ag Elektrodentragarm mit lokal befestigtem Stromleiter
CN101873733B (zh) * 2010-02-05 2011-12-07 姚会元 矿热炉用导电铜颚板
DE102010052086A1 (de) 2010-03-10 2011-09-15 Sms Siemag Ag Elektrodentragarmsystem
US10570045B2 (en) 2015-05-22 2020-02-25 John Hart Miller Glass and other material melting systems
DE102016206028A1 (de) 2016-04-12 2017-10-12 Sms Group Gmbh Tragarm zum Tragen einer Elektrode eines Lichtbogenofens und Verfahren zum Herstellen eines solchen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3602624A (en) * 1970-03-11 1971-08-31 Dixie Bronze Co Unitized electrode holder for electric furnace electrodes or the like
US3686421A (en) * 1971-08-30 1972-08-22 Edgar Wunsche Unitized electride holder and arm for electric arc furnace electrodes or the like
DE2701130A1 (de) * 1976-01-17 1977-07-28 Ishikawajima Harima Heavy Ind Ofenwandkonstruktion fuer einen hochleistungs-lichtbogenofen
EP0340726B1 (fr) * 1988-05-02 1991-07-31 Uwe Kark Bras de support pour électrode d'un four à arc électrique

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB631530A (en) * 1946-01-31 1949-11-04 Delaware Engineering Corp Electric arc furnace with lift and swing aside roof
FR1336823A (fr) * 1962-07-25 1963-09-06 Aluminum Francais L Bras en alliage léger pour four électrique
US4110548A (en) * 1976-12-29 1978-08-29 Bethlehem Steel Corporation Water-cooled electrode holder
US4306726A (en) * 1980-04-22 1981-12-22 Qit-Fer Et Titane Inc. Furnace electrode seal assembly
US4342878A (en) * 1980-05-09 1982-08-03 Wilson Welding Company, Inc. Water-cooled electrode holder
EP0061612B1 (fr) * 1981-03-24 1985-08-07 Fried. Krupp Gesellschaft mit beschränkter Haftung Système de conducteurs pour courant intense pour fours électriques
FR2517502A1 (fr) * 1981-12-01 1983-06-03 Clesid Sa Dispositif d'alimentation et de support d'electrodes pour four a arcs
EP0167485A1 (fr) * 1984-06-25 1986-01-08 Arc Technologies Systems, Ltd. Assemblage pour relier automatiquement l'eau de refroidissement à des électrodes combinées refroidies à l'eau pour fours à arcs électriques
US4682341A (en) * 1984-11-29 1987-07-21 Fuchs Systemtechnik Gmbh Electric arc furnace
DE3522559C1 (de) * 1985-06-24 1987-01-22 Fuchs Systemtechnik Gmbh Lichtbogenofen
US5283803A (en) * 1992-06-01 1994-02-01 Glass Incorporated International Electrode assembly for glass melting furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3602624A (en) * 1970-03-11 1971-08-31 Dixie Bronze Co Unitized electrode holder for electric furnace electrodes or the like
US3686421A (en) * 1971-08-30 1972-08-22 Edgar Wunsche Unitized electride holder and arm for electric arc furnace electrodes or the like
DE2701130A1 (de) * 1976-01-17 1977-07-28 Ishikawajima Harima Heavy Ind Ofenwandkonstruktion fuer einen hochleistungs-lichtbogenofen
EP0340726B1 (fr) * 1988-05-02 1991-07-31 Uwe Kark Bras de support pour électrode d'un four à arc électrique

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
J. Ehle et al., "Entwurf und Betriebsergebnisse von stromleitenden Tragarmen für Lichtbogenöfen", Stahl und Eisen, 105, 1985, Nr. 21, Seiten 1086-1090 *
offenkundige Vorbenutzung des Einsprechenden *

Also Published As

Publication number Publication date
GB9302625D0 (en) 1993-03-24
US5471496A (en) 1995-11-28
JP3300720B2 (ja) 2002-07-08
DE4236158C1 (de) 1994-03-17
EP0594272A1 (fr) 1994-04-27
KR940010857A (ko) 1994-05-26
GB2271836A (en) 1994-04-27
ATE157839T1 (de) 1997-09-15
BR9301181A (pt) 1994-11-01
KR100259014B1 (ko) 2000-06-15
EP0594272B2 (fr) 2005-06-22
JPH06223963A (ja) 1994-08-12
DE59307254D1 (de) 1997-10-09
GB2271836B (en) 1996-03-27
SG52327A1 (en) 1998-09-28
ES2106269T3 (es) 1997-11-01

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