EP0594272B1 - Electrode supporting arm for an electric arc furnace - Google Patents
Electrode supporting arm for an electric arc furnace Download PDFInfo
- 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
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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)
Abstract
Description
Die Erfindung betrifft einen Elektrodentragarm für Lichtbogenöfen zum Anbringen einer Elektrodentragvorrichtung in seinem vorderen Teil, 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 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.
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-
Aus der EP 0 340 725 ist ein aus Leichtmetall gefertigter Tragarm bekannt, durch dessen Hohlraum Kühlflüssigkeit stromt. Für die Kühlwasserversorgung 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 cooling water supply of the clamping bracket, which are connected to the clamping bracket via 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
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 gefährdungsfrei gekühlt wird.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.
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 when using three electrodes, the middle support arm is bent in its central section and 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
- Fig. 1
- Furnace system
- Fig. 2
- Section through an electrode support arm
- Fig. 3
- Scheme of the coolant flow
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).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 Bohrungen (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, wobei d Durchmesser des Kanals und D die Dicke des Profils bedeutet.Bores (36) have been made in the wall (35) during the continuous casting process, which have a ratio of d: D = 1: 1.5-2.5, the individual bores being at a distance a from one another of a = 1-1 , 5 D, where d is the diameter of the channel and D is the thickness of the profile.
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).
- 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)
- An electrode supporting arm for arc furnaces for attaching an electrode supporting device in its front part, which arm is designed with walls formed at least partially of current-conducting material of high conductivity as a hollow profile, characterised in that the walls (35) of the hollow profile (30) havea coolant guidance system (40), with channels (36) arranged parallel to one another and parallel to the centre line of the supporting arm being introduced into the walls (35) in such a number and with such dimensions that sufficient cooling is permitted without a reduction in the strength of the supporting arm.
- An electrode supporting arm according to Claim 1, characterised in that the channels (36) have a diameter d which is in a ratio with the thickness D of the walls (35) of d:D = 1:1.5-2.5, and that the channels (36) are spaced apart from one another by a distance a = 1-1.5 D and are connected together flow-wise in pairs at the top and bottom ends essentially forming a closed coolant circuit.
- An electrode supporting arm according to Claim 1, characterised in that the hollow profile (30) is box-shaped with walls (35) composed of at least two structural members (31).
- An electrode supporting arm according to Claim 3, characterised in that the structural members (31) consist of extruded aluminium profiles (32-34) of identical construction which are connected intimately together by welding.
- An electrode supporting arm according to Claim 4, characterised in that the structural members (31) have the shape of an L.
- An electrode supporting arm according to Claim 1, characterised in that selected channels (36) are connected flow-wise with supply means (49) and removal means (45) of the coolant guidance system (40) for cooling the electrode holding means (27).
- An electrode supporting arm according to Claim 1, characterised in that when using three electrodes (21-23) the electrode supporting arm (25) of the middle electrode (22) has a bent section (28) in its central section, which bent section, in the case of a length 1 relative to the electrode supporting arm length L in a ratio of l:L = 1:3-4, points away from the furnace vessel (11) at an angle α of between 50-70° to the horizontal.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4236158A DE4236158C1 (en) | 1992-10-20 | 1992-10-20 | Electrode support arm for arc furnaces |
DE4236158 | 1992-10-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0594272A1 EP0594272A1 (en) | 1994-04-27 |
EP0594272B1 true EP0594272B1 (en) | 1997-09-03 |
EP0594272B2 EP0594272B2 (en) | 2005-06-22 |
Family
ID=6471405
Family Applications (1)
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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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 (en) * | 2006-06-13 | 2007-12-20 | Arndt Dung | Wall elements for a water-cooled, current-carrying electrode support arm and consisting of such wall elements Elektrodentragarme |
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 |
DE102010052086A1 (en) | 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 (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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FR2517502A1 (en) * | 1981-12-01 | 1983-06-03 | Clesid Sa | ELECTRODE SUPPLYING AND SUPPORTING DEVICE FOR ARC OVEN |
EP0167485A1 (en) * | 1984-06-25 | 1986-01-08 | Arc Technologies Systems, Ltd. | Assembly for the automatic cooling water connection to water cooled combination electrodes for electric arc furnaces |
US4682341A (en) * | 1984-11-29 | 1987-07-21 | Fuchs Systemtechnik Gmbh | Electric arc furnace |
DE3522559C1 (en) * | 1985-06-24 | 1987-01-22 | Fuchs Systemtechnik Gmbh | Arc furnace |
US5283803A (en) * | 1992-06-01 | 1994-02-01 | Glass Incorporated International | Electrode assembly for glass melting furnace |
-
1992
- 1992-10-20 DE DE4236158A patent/DE4236158C1/en not_active Expired - Lifetime
-
1993
- 1993-02-10 SG SG1996002848A patent/SG52327A1/en unknown
- 1993-02-10 GB GB9302625A patent/GB2271836B/en not_active Expired - Fee Related
- 1993-03-15 BR BR9301181A patent/BR9301181A/en not_active IP Right Cessation
- 1993-10-06 EP EP93250271A patent/EP0594272B2/en not_active Expired - Lifetime
- 1993-10-06 AT AT93250271T patent/ATE157839T1/en not_active IP Right Cessation
- 1993-10-06 ES ES93250271T patent/ES2106269T3/en not_active Expired - Lifetime
- 1993-10-06 DE DE59307254T patent/DE59307254D1/en not_active Expired - Lifetime
- 1993-10-15 US US08/138,233 patent/US5471496A/en not_active Expired - Fee Related
- 1993-10-19 JP JP28434593A patent/JP3300720B2/en not_active Expired - Fee Related
- 1993-10-20 KR KR1019930021834A patent/KR100259014B1/en not_active IP Right Cessation
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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 (en) * | 1976-01-17 | 1977-07-28 | Ishikawajima Harima Heavy Ind | FURNACE WALL CONSTRUCTION FOR A HIGH PERFORMANCE ARC FURNACE |
EP0340726B1 (en) * | 1988-05-02 | 1991-07-31 | Uwe Kark | Electrode supporting arm for an electric arc furnace |
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Title |
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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 |
---|---|
KR100259014B1 (en) | 2000-06-15 |
EP0594272B2 (en) | 2005-06-22 |
BR9301181A (en) | 1994-11-01 |
GB9302625D0 (en) | 1993-03-24 |
ATE157839T1 (en) | 1997-09-15 |
DE59307254D1 (en) | 1997-10-09 |
SG52327A1 (en) | 1998-09-28 |
KR940010857A (en) | 1994-05-26 |
JP3300720B2 (en) | 2002-07-08 |
EP0594272A1 (en) | 1994-04-27 |
GB2271836B (en) | 1996-03-27 |
DE4236158C1 (en) | 1994-03-17 |
JPH06223963A (en) | 1994-08-12 |
GB2271836A (en) | 1994-04-27 |
US5471496A (en) | 1995-11-28 |
ES2106269T3 (en) | 1997-11-01 |
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