EP0594272A1 - Electrode supporting arm for an electric arc furnace - Google Patents

Electrode supporting arm for an electric arc furnace Download PDF

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Publication number
EP0594272A1
EP0594272A1 EP93250271A EP93250271A EP0594272A1 EP 0594272 A1 EP0594272 A1 EP 0594272A1 EP 93250271 A EP93250271 A EP 93250271A EP 93250271 A EP93250271 A EP 93250271A EP 0594272 A1 EP0594272 A1 EP 0594272A1
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EP
European Patent Office
Prior art keywords
support arm
electrode
electrode support
wall
channels
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
EP93250271A
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German (de)
French (fr)
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EP0594272B2 (en
EP0594272B1 (en
Inventor
Lutz Becker
Andreas Schüring
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SMS Siemag AG
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Mannesmann AG
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    • 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, 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, 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 chosen so that the support arm designed as a hollow profile is sufficiently rigid 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 middle section when three electrodes are used and is guided above the other electrode arms.
  • 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)

Abstract

An electrode support arm for arc furnaces which is constructed as a hollow section with a wall formed at least partially from current-carrying material of high conductivity. The wall of the hollow section has a coolant guiding system including ducts arranged in the wall so as to be parallel to one another and concentric to the center axis of the support arm. The quantity and dimensions of these ducts enable sufficient cooling without a reduction in the strength of the support arm.

Description

Die Erfindung betrifft einen Elektrodentragarm für Lichtbogenöfen, der mit einer zumindest teilweise aus stromführendem Material hoher Leitfähigkeit gebildeten Wandung als Hohlprofil ausgestaltet ist.The invention relates to an electrode support arm for arc furnaces, which is designed as a hollow profile with a wall formed at least partially from current-carrying material of high conductivity.

Elektroden für Lichtbogenöfen für die Stahlherstellung sind üblicherweise mittels Elektrodenklemmen an Tragarmen befestigt, die ihrerseits an vertikal beweglichen Tragsäulen gehalten sind. Die Stromzuführung geschieht dabei entweder in oberhalb des Tragarmes geführten Stromrohren oder über den Tragarmen selber. Dabei wird der Strom bei aus Stahl bestehenden Tragarmen mit außenseitig aufplattiertem Kupfer oder Aluminium geführt. Der Tragarm kann aber auch komplett aus einem den Strom gut führendem Material bestehen.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. In the case of support arms made of steel, 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.

So ist aus der Schrift FR-PS 1 336 823 ein in seiner Gesamtheit stromführend aus Aluminium hergestellter Tragarm bekannt. Wegen der geringen Strombelastung ist der als Hohlprofil ausgebildete Tragarm selbst ungekühlt. Die für die Elektrodenklemme erforderliche Kühlwasserzuführung geschient über Rohre, die durch den Innenraum des Hohlprofiles geführt werden.Thus, from the document FR-PS 1 336 823, a support arm, which is made of aluminum and carries current, 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.

Aus der EP 0 340 725 ist ein aus Leichtmetall gefertigter Tragarm bekannt, durch dessen Hohlraum Kühlflüssigkeit stromt. Für die Kohlwasserversorgung des Spannbügels sind Rohrleitungen vorgesehen, die über Schläuche an den Spannbügel angeschlossen sind.From EP 0 340 725 a support arm made of light metal is known, through the cavity of which cooling liquid flows. Pipelines are provided for the cabbage water supply of the clamp, which are connected to the clamp by hoses.

Bei beiden genannten Elektrodenarmen ist die Kühlung der Elektrodenhalterung aufwendig ausgeführt. Darüber hinaus wird bei der gekühlten Tragarmausführung das Kühlpotential des Kühlmediums nicht ausreichend ausgenutzt.In both of the electrode arms mentioned, the cooling of the electrode holder is complex. In addition, the cooling potential of the cooling medium is not sufficiently exploited in the cooled support arm design.

Die Erfindung hat sich daher das Ziel gesetzt, die genannten Nachteile zu vermeiden und einen baulich einfachen, gewichtsarmen und dabei konstruktiv steifen Tragarm zu schaffen, mit dem wartungsarm hohe elektrische Leistungen übertragbar sind.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.

Die Erfindung erreicht diese Ziele mit den kennzeichnenden Merkmalen des Anspruchs 1.The invention achieves these aims with the characterizing features of claim 1.

Bei dem erfindungsgemäß ausgestalteten Tragarm besteht dessen Wandung aus Profilen, in denen parallel zueinander angeordnete Kanäle eingebracht sind. An den Kopf- bzw. Fußenden der Kanäle sind jeweils zwei Enden miteinander verbunden, so daß ein beliebig gestaltbares Kühlwasserkreislaufsystem entsteht.In the case of the support arm designed according to the invention, 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.

Die Dicke der Wandung ist so gewählt, daß der als Hohlprofil ausgebildete Tragarm ausreichend steif ist und gleichzeitig die gesamte Wandung gefährungsfrei gekühlt wird.The thickness of the wall is chosen so that the support arm designed as a hollow profile is sufficiently rigid and at the same time the entire wall is cooled without risk.

Das Hohlprofil kann dabei eine kreisförmige, eine ovale oder eine kastenförmige Gestalt haben. Bevorzugt wird die kastenförmige Gestalt, wobei die Wandung aus zwei gleich großen L-Profilen oder aus vier an den Ecken miteinander verschweißten Flachprofilen besteht.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.

Vorzugsweise kommen als Wandung Flachprofile aus Aluminium zum Einsatz, die im Strangpreßverfahren hergestellt wurden. Diese Profile weisen nicht nur eine hohe Maßhaltigkeit auf, sie besitzen auch eine hervorragende Oberflächenbeschaffenheit gerade bei der Kühlkanalaußenwand, so daß zur Erzielung der gewünschten Kühlmittelströmungsgeschwindigkeit keinerlei Nacharbeit erforderlich ist.Flat aluminum profiles, which were produced using the extrusion process, are preferably used as the wall. These profiles not only have a high degree of dimensional accuracy, they also have an excellent surface finish, especially on the cooling channel outer wall, so that no rework is required to achieve the desired coolant flow rate.

Der erfindungsgemäße Tragarm ist deutlich leichter als bisher bekanntgewordene Tragarme vergleichbarer Größen. Dies rührt zum einen her durch den Einsatz der mit Kanälen versehenen Wandung, so daß bei vergleichsweiser Steife das Eigengewicht des Armes geringer ist. Zum anderen kommt aber insgesamt weniger Wasser zum Einsatz, da deutlich weniger Wassermenge gezielt durch die Kanäle durch den als geschlossenen Kühlmittelkreislauf gestalteten Tragarm geführt wird.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.

Der erfindungsgemäße Tragarm hat eine äußere schlichte Form, bei der keinerlei Bauelemente nach außen ragen und somit möglichen Beschädigungen ausgesetzt sind.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.

Die schlichte Form erlaubt ein einfaches Anbringen der Elektrodentragvorrichtung im vorderen Teil des Tragarmes. Dadurch wird ein einfacher Wechsel gewahrleistet.The simple shape allows easy attachment of the electrode support device in the front part of the support arm. This ensures an easy change.

Zur Minderung der Induktionsverluste wird beim Einsatz von drei Elektroden der mittlere Tragarm in seinem Mittenabschnitt abgeknickt und oberhalb der übrigen Elektrodenarme geführt.To reduce the induction losses, the middle support arm is bent in its middle section when three electrodes are used and is guided above the other electrode arms.

Ein Beispiel der Erfindung ist in der beiliegenden Zeichnung dargelegt. Es zeigen:

Fig. 1
Ofenanlage
Fig. 2
Schnitt durch einen Elektrodentragarm
Fig. 3
Schema der Kühlmittelführung
In der Figur 1 ist ein Lichtbogenofen (10) dargestellt, mit einem Ofengefäß (11), das mit einem Deckel (12) geschlossen ist. Im Ofengefäß (11) befindet sich Schmelze (13) und Schlacke (14).An example of the invention is set out in the accompanying drawing. Show it:
Fig. 1
Furnace system
Fig. 2
Section through an electrode support arm
Fig. 3
Scheme of coolant management
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).

Durch den Deckel (12) ragen Elektroden (21-23) in das Ofengefäß (11) hinein, die an einem Elektrodenarm (24) oder an einzelnen Elektrodenarmen (25-27) einer Elektrodentragvorrichtung (20) befestigt sind.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).

Bei der Verwendung von drei Elektrodentragarmen (25-27) besitzt der mittlere Elektrodentragarm eine Abknickung (28), die mit Horizontalelektrodentragteilen (29) innig verbunden ist. Die Länge des mittleren Elektrodentragarmes (25) ist mit "L" bezeichnet. Diese Länge "L" weist im mittleren Bereich eine Abknicklänge "l" auf, wobei dieser Teil des Elektrodentragarmes in einem Abknickwinkel (α) zum Horizontalelektrodentragteil (29) angeordnet ist.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 (α) to the horizontal electrode support part (29).

Die Figur 2 zeigt Hohlprofile (30) des Elektrodentragarms mit Bauelementen (31). Diese Bauelemente (31) sind stranggepreßt und weisen in Längsrichtung Kanäle (36) auf, die in Anzahl und Abmessung so ausgelegt sind, daß eine ausreichende Kühlung ohne Minderung der Festigkeit des Tragarmes erreichbar ist.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.

In vorteilhafter Weise wird das Hohlprofil aus mind. zwei stranggepreßten Bauelementen durch Schweißen zusammengefügt. Diese Bauelemente können dabei als Ovalprofil (34) 〈Figur 2.3〉 oder als L-Profil (33) 〈Figur 2.2〉 ausgestaltet sein. Sie können aber auch, wie in der Figur 2.1 dargestellt, aus baugleichen Flachprofilen (32) zusammengefügt werden, die an 4 Nahtstellen zusammengeschweißt werden.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.

In der Wandung (35) sind Bohrung (36) während des Stranggießprozesses eingebracht worden, die ein Verhältnis von d:D = 1:1,5 - 2,5 aufweisen, wobei die einzelnen Bohrungen einen Abstand (a) zueinander von a = 1-1,5 D besitzen.Bore (36) was made in the wall (35) during the continuous casting process, which has a ratio of d: D = 1: 1.5 - 2.5, the individual bores being at a distance (a) from each other of a = 1 Have -1.5 D.

An den Kopfenden der Hohlprofile sind Flansche oder Deckel angebracht, durch die parallel angeordnete Kanäle miteinander verbunden sind, und so einen definierten Kühlmitteldurchfluß ermöglichen.At the head ends of the hollow profiles, flanges or lids are attached, through which parallel channels are connected to one another, and thus enable a defined coolant flow.

In der Figur 3 sind einzelne Stromfäden des Kühlmittels einer Kühlmittelleitsysteme (40) dargestellt. Die einzelnen Kanäle (36) bilden dabei den Kühlmittelfaden (46), der den größten Teil des Tragarmes durchströmt. Die Elektrodenhalterung (27) weist dabei die Kühlmittelfäden (47 und 48) auf, die von den Kühlmittelfäden (49) versorgt werden. Durch die Vielzahl der Kanäle lassen sich unterschiedlichste Kühlmittelführungen darstellen. In der Figur 3 ist im unteren Teil des Bildes noch die Möglichkeit der Kühlung eines Spritzrings (41) dargestellt, aus dem das Wasser frei abfließen kann, das über den Kühlmittelfaden (42) ihm zugeführt wird.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. In FIG. 3, 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).

PositionslistePosition list

1010th
LichtbogenofenArc furnace
1111
OfengefäßOven vessel
1212th
Deckelcover
1313
Schmelzemelt
1414
Schlackeslag
2020th
ElektrodentragvorrichtungElectrode support device
2121
Elektrodeelectrode
2222
mittlere Elektrodemiddle electrode
2323
Elektrodeelectrode
2424th
Elektrodentragarm zu 21Electrode support arm for 21
2525th
mittlerer Elektrodentragarm zu 22middle electrode arm to 22
2626
äußerer Elektrodentragarm zu 23outer electrode support arm to 23
2727
ElektrodenhalterungElectrode holder
2828
AbknickungKink
2929
horizontaler Elektrodentragteilhorizontal electrode support
3030th
HohlprofilHollow profile
3131
BauelementComponent
3232
FlachprofilFlat profile
3333
L-ProfilL-profile
3434
OvalprofilOval profile
3535
WandungWall
3636
Kanalchannel
4040
KühlmittelleitsystemCoolant control system
4141
SpritzringThrower ring
4242
Zuführung zu 41Addition to 41
4545
AbleitungDerivative
4646
Kühlmittel in Kanal 36Coolant in channel 36
4747
Kühlmittel in äußerer ElektrodenhalterungCoolant in the outer electrode holder
4848
Kühlmittel in innerer ElektrodenhalterungCoolant in the inner electrode holder
4949
Zuführung zu 47, 48Feed to 47, 48
aa
Abstand zwischen zwei KanälenDistance between two channels
dd
Durchmesser KanalChannel diameter
DD
Dicke ProfilThick profile
αα
AbknickwinkelKink angle
ll
AbknicklängeKink length
LL
Länge ElektrodenarmElectrode arm length

Claims (7)

Elektrodentragarm für Lichtbogenöfen, der mit einer zumindest teilweise aus stromführenden Material hoher Leitfähigkeit gebildeten Wandung als Hohlprofil ausgestaltet ist,
dadurch gekennzeichnet,
daß die Wandung (35) des Hohlprofils (30) ein Kühlmittelleitsystem (40) aufweist, wobei in die Wandung (35) parallel zueinander und konzentrisch zur Tragarmmittenachse angeordnete Kanäle (36) in einer Anzahl und Abmessung eingebracht sind, die eine ausreichende Kühlung ohne Minderung der Festigkeit des Tragarmes ermöglichen.Electrode support arm for arc furnaces, which is designed as a hollow profile with a wall formed at least partially from current-carrying material of high conductivity,
characterized,
that the wall (35) of the hollow profile (30) has a coolant guide system (40), channels (36) arranged in the wall (35) parallel to one another and concentrically to the central axis of the support arm in a number and dimension which provide sufficient cooling without reduction allow the strength of the support arm. Elektrodentragarm nach Anspruch 1,
dadurch gekennzeichnet,
daß die Kanäle (36) einen Durchmesser (d) besitzen, der sich zur Dicke (D) der Wandung (35) verhält wie d:D = 1:1,5-2,5, und daß die Kanäle (36) die zueinander mit einem Abstand a = 1-1,5 D beabstandet und kopf- - sowie fußendig im wesentlichen einen geschlossenen Kühlmittelkreislauf bildend paarweise strömungsmäßig miteinander verbunden sind.Electrode support arm according to claim 1,
characterized,
that the channels (36) have a diameter (d) that is related to the thickness (D) of the wall (35) as d: D = 1: 1.5-2.5, and that the channels (36) are mutually exclusive spaced a distance a = 1-1.5 D and at the top and bottom are essentially connected in pairs to form a closed coolant circuit. Elektrodentragarm nach Anspruch 1,
dadurch gekennzeichnet,
daß das Hohlprofil (30) kastenförmig ausgestaltet ist mit einer aus mindestens zwei Bauelementen (31) zusammengeführten Wandung (35).Electrode support arm according to claim 1,
characterized,
that the hollow profile (30) is box-shaped with a wall (35) brought together from at least two components (31). Elektrodentragarm nach Anspruch 3,
dadurch gekennzeichnet,
daß die Bauelemente (31) aus baugleichen stranggepreßten Aluminiumprofilen (32-34) bestehen, welche durch Schweißen innig miteinander verbunden werden.Electrode support arm according to claim 3,
characterized,
that the components (31) consist of structurally identical extruded aluminum profiles (32-34) which are intimately connected by welding. Elektrodentragarm nach Anspruch 4,
dadurch gekennzeichnet,
daß die Bauelemente (31) die Form eines L aufweisen.Electrode support arm according to claim 4,
characterized,
that the components (31) have the shape of an L. Elektrodentragarm nach Anspruch 1,
dadurch gekennzeichnet,
daß ausgewählte Kanäle (36) zur Kühlung der Elektrodenhalterung (27) strömungsmäßig mit Zuführungen (49) und Abführungen (45) des Kühlmittelleitsystems (40) verbunden sind.Electrode support arm according to claim 1,
characterized,
that selected channels (36) for cooling the electrode holder (27) are connected in terms of flow to inlets (49) and outlets (45) of the coolant guide system (40). Elektrodentragarm nach Anspruch 1,
dadurch gekennzeichnet,
daß bei Verwendung von drei Elektroden (21-23) der Elektrodentragarm (25) der mittleren Elektrode (22) in seinem Mittenabschnitt eine Abknickung (28) besitzt, die bei einer Länge (l) zur Elektrodenarmlänge (L) im Verhältnis l:L = 1:3-4 unter einem Winkel (α) zwischen 50-70° zur Horizontalen vom Ofengefäß (11) wegweist.Electrode support arm according to claim 1,
characterized,
that when using three electrodes (21-23) the electrode support arm (25) of the central electrode (22) has a kink (28) in its central section, which has a length (l) to the electrode arm length (L) in the ratio l: L = 1: 3-4 away from the furnace vessel (11) at an angle (α) between 50-70 ° to the horizontal.
EP93250271A 1992-10-20 1993-10-06 Electrode supporting arm for an electric arc furnace Expired - Lifetime EP0594272B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4236158 1992-10-20
DE4236158A DE4236158C1 (en) 1992-10-20 1992-10-20 Electrode support arm for arc furnaces

Publications (3)

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

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ID=6471405

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Application Number Title Priority Date Filing Date
EP93250271A Expired - Lifetime EP0594272B2 (en) 1992-10-20 1993-10-06 Electrode supporting arm for an electric arc furnace

Country Status (10)

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

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WO2011110522A1 (en) 2010-03-10 2011-09-15 Sms Siemag Ag Electrode support arm system
US8798113B2 (en) 2006-06-13 2014-08-05 Arndt Dung Wall elements for water-cooled, current-conducting electrode bearing arms and electrode bearing arms produced from such wall elements
DE102016206028A1 (en) 2016-04-12 2017-10-12 Sms Group Gmbh Support arm for supporting an electrode of an arc furnace and method for producing such

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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
EP1901585B1 (en) * 2006-09-18 2012-08-29 Homa Gesellschaft f. Hochstrom- Magnetschalter v. Vollenbroich GmbH & Co. KG Electrode arm for arc furnace
US20090044568A1 (en) * 2007-08-15 2009-02-19 Albert Lewis Submerged fired vertical furnance
JP4533986B2 (en) * 2008-09-17 2010-09-01 有限会社 ベイテック Cooling structure in electrode support arm
DE102009034407A1 (en) 2009-07-23 2011-02-03 Fuchs Technology Holding Ag Electrode support arm with locally fixed conductor
CN101873733B (en) * 2010-02-05 2011-12-07 姚会元 Conductive copper jaw plate for mine heat furnace and manufacture method thereof
US10570045B2 (en) 2015-05-22 2020-02-25 John Hart Miller Glass and other material melting systems

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EP0184140A2 (en) * 1984-11-29 1986-06-11 Fuchs Systemtechnik GmbH Arc furnace

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FR1336823A (en) * 1962-07-25 1963-09-06 Aluminum Francais L Light alloy arm for electric oven
US4110548A (en) * 1976-12-29 1978-08-29 Bethlehem Steel Corporation Water-cooled electrode holder
US4342878A (en) * 1980-05-09 1982-08-03 Wilson Welding Company, Inc. Water-cooled electrode holder
EP0061612A1 (en) * 1981-03-24 1982-10-06 Fried. Krupp Gesellschaft mit beschränkter Haftung High-current conductor system for electric furnaces
EP0080954A1 (en) * 1981-12-01 1983-06-08 Clecim Connection and support arrangement for the electrodes of an arc furnace
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8798113B2 (en) 2006-06-13 2014-08-05 Arndt Dung Wall elements for water-cooled, current-conducting electrode bearing arms and electrode bearing arms produced from such wall elements
WO2011110522A1 (en) 2010-03-10 2011-09-15 Sms Siemag Ag Electrode support arm system
DE102010052086A1 (en) 2010-03-10 2011-09-15 Sms Siemag Ag Elektrodentragarmsystem
DE102016206028A1 (en) 2016-04-12 2017-10-12 Sms Group Gmbh Support arm for supporting an electrode of an arc furnace and method for producing such
EP3232735A1 (en) 2016-04-12 2017-10-18 SMS Group GmbH Supporting arm for supporting an electrode of an electric arc furnace and method for producing same

Also Published As

Publication number Publication date
EP0594272B2 (en) 2005-06-22
GB9302625D0 (en) 1993-03-24
JPH06223963A (en) 1994-08-12
US5471496A (en) 1995-11-28
EP0594272B1 (en) 1997-09-03
ES2106269T3 (en) 1997-11-01
DE4236158C1 (en) 1994-03-17
BR9301181A (en) 1994-11-01
GB2271836B (en) 1996-03-27
KR100259014B1 (en) 2000-06-15
KR940010857A (en) 1994-05-26
ATE157839T1 (en) 1997-09-15
DE59307254D1 (en) 1997-10-09
SG52327A1 (en) 1998-09-28
GB2271836A (en) 1994-04-27
JP3300720B2 (en) 2002-07-08

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