EP1891836A1 - Cooling device for the electrodes of a metallurgical furnace - Google Patents

Cooling device for the electrodes of a metallurgical furnace

Info

Publication number
EP1891836A1
EP1891836A1 EP06776631A EP06776631A EP1891836A1 EP 1891836 A1 EP1891836 A1 EP 1891836A1 EP 06776631 A EP06776631 A EP 06776631A EP 06776631 A EP06776631 A EP 06776631A EP 1891836 A1 EP1891836 A1 EP 1891836A1
Authority
EP
European Patent Office
Prior art keywords
cooling device
cooling
end region
furnace
electrodes
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
EP06776631A
Other languages
German (de)
French (fr)
Other versions
EP1891836B1 (en
Inventor
Karl-Heinz Kummer
Horst-Dieter Borgwardt
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
SMS Demag 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
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1891836A1 publication Critical patent/EP1891836A1/en
Application granted granted Critical
Publication of EP1891836B1 publication Critical patent/EP1891836B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H05B7/12—Arrangements for cooling, sealing or protecting electrodes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/24—Cooling arrangements
    • 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
    • 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

Definitions

  • the invention relates to a cooling device for electrodes of a metallurgical furnace, such as reduction furnace, electric arc furnace, induction furnace, etc., which encloses at least one contact jaw and a mounting ring, consisting of a cooling shield / sealing cylinder, which merges into an end region consisting of an outer ring, a face plate and an inner ring,
  • this device provides, according to DE 1 022 332, for an electric drafting device for arc and reduction furnaces, with a sealing cylinder surrounding the socket, projecting into the furnace chamber and preferably height-adjustable supported on the furnace cover, in which the mounting parts are in an upwardly open cylinder are arranged, while the seal is below the upper edge of the contact jaws, wherein the contact jaws are surrounded by a reaction of the contact pressure against the electrodes receiving abutment.
  • Electrodes Further details on electrodes, electrode sockets, mounting rings, contact jaws, etc. are in the publications DE 10 26 017, DE 14 40 358, DE 14 40 358, DE 23 12 099, DE 33 40 390 C2, DE 36 30 861 C2 and DE 43 42 511 C2. From DE 34 OO 186 C2 a passage for a plurality of electrodes through the lid of an electric arc or reduction furnace, each with a double-walled water-cooled hollow cylinder made of electrically conductive material is known.
  • the implementation comprises in each case an electrode and, when using Tief chargeden, the axis-parallel around the electrode arranged current guides and contact jaws.
  • An electrode base for arc or reduction furnaces is described in DE 21 25 773 C3.
  • the power supply parts lying in the furnace area in particular current conductors, socket parts and the like, are protected by a double-walled, water-cooled cooling jacket arranged coaxially to the electrode.
  • the cooling jacket extends to the cooled mounting ring and is detachable from this.
  • the cooling jacket is divided by a transverse plane to its axis in an upper cylindrical and a lower cylindrical portion. The lower part is subdivided into interconnected, coolant-flowed segment-like cooling shields.
  • FIG. 1 shows a known embodiment of a cooling device.
  • the cooling device is assembled from several individual parts, in particular welded together. The simplest possible shapes are taken into account in the individual parts.
  • the known cooling device consists of an inner ring which is welded at an angle with an annular end plate in the region of the electrode. The outer portion of the end plate shows in cross-section a radius which merges into a cooling plate or sealing cylinder.
  • the front area of cooling shield or sealing cylinder consists of two parts, an inner ring and a face plate. In the front area are cavities for passing a cooling medium, e.g. Cooling water.
  • the invention has for its object to improve the known cooling device so that high voltages are avoided, which in particular bring the disadvantages mentioned above with it. With an improved design of the cooling device whose safety and durability should be improved.
  • the cooling device is integrally formed in the forehead area.
  • the decisive advantage of the cooling device according to the invention is that the welds in the forehead area are displaced or avoided. Due to the special shape of the cooling device in the stimulus area a lower attack surface for wind instruments (heat) is achieved.
  • the improvements shown avoid or reduce furnace downtime and improve the safety and durability of those located within the cooling device.
  • Fig. 1 in a sectional side view of a cooling device in a known
  • FIG. 2 in a sectional side view of a cooling device according to the invention
  • an electrode 1 with adjacent contact jaw 2 and to corresponding socket ring 3 is shown in a known embodiment.
  • the cooling device 4 consists of a cooling plate / sealing cylinder 5, which merges into an outer ring 6 in the lower region.
  • the outer ring 6 forms with a front plate 7 and an inner ring 8 a stimulus region 9, wherein the downwardly projecting electrode 1 protrudes beyond the end region 9 of the cooling device 4.
  • Inner ring 8 and end plate 7 are in the contact area 10, outer ring 6 and end plate 7 are welded together in the contact area 11 and have welds 12, 13.
  • FIG. 2 shows the cooling device 4 according to the invention in a sectional side view.
  • the end portion 9 is formed in one piece and has no shit on.
  • the cross-sectional shapes of the end region 9 can be designed differently according to the requirements or the material used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The annular front sealing ring (9) of the cooling system has the three component parts (6,7,8) formed as an integrated piece eliminating weld joints (12,13).

Description

Kühlvorrichtung für Elektroden eines metallurgischen OfensCooling device for electrodes of a metallurgical furnace
Die Erfindung betrifft eine Kühlvorrichtung für Elektroden eines metallurgischen Ofens, wie Reduktionsofen, Lichtbogenofen, Induktionsofen usw., die mindestens eine Kontaktbacke und einen Fassungsring umschließt, bestehend aus einem Kühlschild / Abdichtzylinder, der in einen Stirnbereich übergeht, der aus einem Außenring, einer Stirnplatte und einem Innenring besteht,The invention relates to a cooling device for electrodes of a metallurgical furnace, such as reduction furnace, electric arc furnace, induction furnace, etc., which encloses at least one contact jaw and a mounting ring, consisting of a cooling shield / sealing cylinder, which merges into an end region consisting of an outer ring, a face plate and an inner ring,
In der DE 944 026 wird eine Elektrodentieffassung für geschlossene Lichtbogenöfen mit einem die Fassung umgebenden Dichtungszylinder beschrieben, bei dem die Fassungsteile in einem nach oben offenen Zylinder angeordnet sind, während die Abdichtung unter der Oberkante der Kontaktbacken liegt, die unten aus dem Zylinder herausragen.In DE 944 026 a Elektrodentiebstassung is described for closed arc furnaces with a socket surrounding the seal, in which the socket parts are arranged in an upwardly open cylinder, while the seal is below the upper edge of the contact jaws, which protrude from the bottom of the cylinder.
Eine Weiterentwicklung dieser Vorrichtung sieht gemäß DE 1 022 332 eine E- lektrodentieffassung vor für Lichtbogen- und Reduktionsöfen, mit einem die Fassung umgebenden, in den Ofenraum hineinragenden, auf dem Ofendeckel vorzugsweise höhenverstellbar abgestützten Dichtungszylinder, bei der die Fassungsteile in einem nach oben offenen Zylinder angeordnet sind, während die Abdichtung unter der Oberkante der Kontaktbacken liegt, wobei die Kontaktbacken von einem die Reaktion des Anpressdruckes gegen die Elektroden aufnehmenden Widerlager umgeben sind.A further development of this device provides, according to DE 1 022 332, for an electric drafting device for arc and reduction furnaces, with a sealing cylinder surrounding the socket, projecting into the furnace chamber and preferably height-adjustable supported on the furnace cover, in which the mounting parts are in an upwardly open cylinder are arranged, while the seal is below the upper edge of the contact jaws, wherein the contact jaws are surrounded by a reaction of the contact pressure against the electrodes receiving abutment.
Weitere Ausführungen zu Elektroden, Elektrodenfassungen, Fassungsringen, Kontaktbacken, usw. sind in den Druckschriften DE 10 26 017, DE 14 40 358, DE 14 40 358, DE 23 12 099, DE 33 40 390 C2, DE 36 30 861 C2 und DE 43 42 511 C2 beschrieben. Aus der DE 34 OO 186 C2 ist eine Durchführung für mehrere Elektroden durch den Deckel eines Elektrolichtbogen- oder Reduktionsofens, mit je einem dop- pelwandigen wassergekühlten Hohlzylinder aus elektrisch leitendem Werkstoff bekannt. Die Durchführung umfasst jeweils eine Elektrode sowie, bei Verwendung von Tieffassungen, die achsparallel um die Elektrode angeordneten Stromführungen und Kontaktbacken.Further details on electrodes, electrode sockets, mounting rings, contact jaws, etc. are in the publications DE 10 26 017, DE 14 40 358, DE 14 40 358, DE 23 12 099, DE 33 40 390 C2, DE 36 30 861 C2 and DE 43 42 511 C2. From DE 34 OO 186 C2 a passage for a plurality of electrodes through the lid of an electric arc or reduction furnace, each with a double-walled water-cooled hollow cylinder made of electrically conductive material is known. The implementation comprises in each case an electrode and, when using Tieffassungen, the axis-parallel around the electrode arranged current guides and contact jaws.
Eine Elektroden - Tieffassung für Lichtbogen- oder Reduktionsöfen wird in der DE 21 25 773 C3 beschrieben. Dabei werden die im Ofenbereich liegenden Stromzuführungsteile, insbesondere Stromleiter, Fassungsteile und derglei- chen, durch einen doppelwandigen, wassergekühlten, zur Elektrode koaxial angeordneten Kühlmantel geschützt. Der Kühlmantel reicht bis zum gekühlten Fassungsring und ist von diesem lösbar. Der Kühlmantel wird durch eine quer zu seiner Achse verlaufenden Ebene in einen oberen zylindrischen und einen unteren zylindrischen Teil unterteilt. Der untere Teil ist in miteinander lösbar verbundene, kühlmitteldurchströmte segmentartige Kühlschilde unterteilt.An electrode base for arc or reduction furnaces is described in DE 21 25 773 C3. In this case, the power supply parts lying in the furnace area, in particular current conductors, socket parts and the like, are protected by a double-walled, water-cooled cooling jacket arranged coaxially to the electrode. The cooling jacket extends to the cooled mounting ring and is detachable from this. The cooling jacket is divided by a transverse plane to its axis in an upper cylindrical and a lower cylindrical portion. The lower part is subdivided into interconnected, coolant-flowed segment-like cooling shields.
In Figur 1 ist eine bekannte Ausführung einer Kühlvorrichtung dargestellt. Die Kühlvorrichtung wird aus mehreren Einzelteilen zusammengebaut, insbesondere zusammen geschweißt. Dabei werden möglichst einfache Formen bei den Einzelteilen berücksichtigt. Wie ersichtlich, besteht die bekannte Kühlvorrichtung aus einem Innenring, der mit einer kreisringförmigen Stirnplatte winklig im Bereich der Elektrode verschweißt ist. Der äußere Bereich der Stirnplatte zeigt im Querschnitt einen Radius, der in ein Kühlschild oder Abdichtzylinder übergeht. Der Stirnbereich von Kühlschild oder Abdichtzylinder besteht aus zwei Teilen, einem Innenring und einer Stirnplatte. Im Stirnbereich befinden sich Hohlräume zum Durchleiten eines Kühlemediums, z.B. Kühlwasser.FIG. 1 shows a known embodiment of a cooling device. The cooling device is assembled from several individual parts, in particular welded together. The simplest possible shapes are taken into account in the individual parts. As can be seen, the known cooling device consists of an inner ring which is welded at an angle with an annular end plate in the region of the electrode. The outer portion of the end plate shows in cross-section a radius which merges into a cooling plate or sealing cylinder. The front area of cooling shield or sealing cylinder consists of two parts, an inner ring and a face plate. In the front area are cavities for passing a cooling medium, e.g. Cooling water.
Temperaturspitzen bis ca. 20000C im Ofen erzeugen hohe Spannungen in den Schweißnahtbereichen, daher hat die Kühlvorrichtung speziell im Stirnbereich eine geringe Lebensdauer. Außerdem besteht die Gefahr, dass Kühlwasser / Kühlmedium aus der Kühlvorrichtung in den Ofen gelangt und dieses zu Prozessstörungen führt, die einen Stillstand der kompletten Anlage hervorruft.Temperature peaks up to approx. 2000 ° C. in the furnace generate high stresses in the weld seam areas, which is why the cooling device has a short service life, especially in the forehead area. In addition, there is a risk that cooling water / Cooling medium from the cooling device enters the oven and this leads to process disturbances, causing a stoppage of the entire system.
Der Erfindung liegt die Aufgabe zugrunde, die bekannte Kühlvorrichtung so zu verbessern, dass hohe Spannungen vermieden werden, die insbesondere die oben genannten Nachteile mit sich bringen. Mit einer verbesserten Ausbildung der Kühlvorrichtung soll deren Sicherheit und Standzeit verbessert werden.The invention has for its object to improve the known cooling device so that high voltages are avoided, which in particular bring the disadvantages mentioned above with it. With an improved design of the cooling device whose safety and durability should be improved.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass bei einer Kühlvorrichtung gemäß dem Oberbegriff von Anspruch 1 , die Kühlvorrichtung im Stirn- bereich einteilig ausgebildet ist.This object is achieved in that, in a cooling device according to the preamble of claim 1, the cooling device is integrally formed in the forehead area.
Weitere Ausgestaltungen der Kühlvorrichtung ergeben sich aus den diesbezüglichen Unteransprüchen.Further embodiments of the cooling device will become apparent from the relevant subclaims.
Der entscheidende Vorteil der erfindungsgemäßen Kühlvorrichtung liegt darin, das Schweißnähte im Stirnbereich verlagert bzw. vermieden werden. Durch die besondere Formgestaltung der Kühlvorrichtung im Stimbereich wird eine geringere Angriffsfläche für Bläser (Hitze) erreicht.The decisive advantage of the cooling device according to the invention is that the welds in the forehead area are displaced or avoided. Due to the special shape of the cooling device in the stimulus area a lower attack surface for wind instruments (heat) is achieved.
Die aufgezeigten Verbesserungen vermeiden bzw. reduzieren die Ofenstillstandszeiten und verbessern die Sicherheit und die Standzeit der innerhalb der Kühlvorrichtung angeordneten .The improvements shown avoid or reduce furnace downtime and improve the safety and durability of those located within the cooling device.
Ein Ausführungsbeispiel der Erfindung und der Stand der Technik werden an- hand von sehr schematischen Zeichnungen näher beschrieben. Es zeigen:An embodiment of the invention and the prior art will be described with reference to very schematic drawings. Show it:
Fig. 1 in geschnittener Seitenansicht eine Kühlvorrichtung in bekannterFig. 1 in a sectional side view of a cooling device in a known
Ausführung,Execution,
Fig. 2 in geschnittener Seitenansicht eine erfindungsgemäße Kühlvorrichtung In Figur 1 ist eine Elektrode 1 mit anliegender Kontaktbacke 2 und dazu korrespondierendem Fassungsring 3 in einer bekannten Ausführung dargestellt. Diese Einzelteile / Komponenten werden von einer Kühlvorrichtung 4 umschlossen. Die Kühlvorrichtung 4 besteht aus einem Kühlschild / Abdichtzylinder 5, der im unteren Bereich in einen Außenring 6 übergeht. Der Außenring 6 bildet mit einer Stirnplatte 7 und einem Innenring 8 einen Stimbereich 9, wobei die nach unten ragende Elektrode 1 über den Stirnbereich 9 der Kühlvorrichtung 4 hinausragt. Innenring 8 und Stirnplatte 7 sind im Kontaktbereich 10, Außenring 6 und Stirnplatte 7 sind im Kontaktbereich 11 miteinander verschweißt und weisen Schweißnähte 12, 13 auf.Fig. 2 in a sectional side view of a cooling device according to the invention In Figure 1, an electrode 1 with adjacent contact jaw 2 and to corresponding socket ring 3 is shown in a known embodiment. These items / components are enclosed by a cooling device 4. The cooling device 4 consists of a cooling plate / sealing cylinder 5, which merges into an outer ring 6 in the lower region. The outer ring 6 forms with a front plate 7 and an inner ring 8 a stimulus region 9, wherein the downwardly projecting electrode 1 protrudes beyond the end region 9 of the cooling device 4. Inner ring 8 and end plate 7 are in the contact area 10, outer ring 6 and end plate 7 are welded together in the contact area 11 and have welds 12, 13.
Figur 2 zeigt die erfindungsgemäße Kühlvorrichtung 4 in geschnittener Seitenansicht. Dabei ist der Stirnbereich 9 einteilig ausgebildet und weist keine Scheißnaht auf. Die Querschnittsformen des Stirnbereiches 9 können den Anforderungen bzw. dem verwendeten Werkstoff entsprechend unterschiedlich ausgebildet sein. FIG. 2 shows the cooling device 4 according to the invention in a sectional side view. In this case, the end portion 9 is formed in one piece and has no shit on. The cross-sectional shapes of the end region 9 can be designed differently according to the requirements or the material used.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1. Elektrode1st electrode
2. Kontaktbacke2. Contact jaw
3. Fassungsring3rd mounting ring
4. Kühlvorrichtung4. Cooling device
5. Kühlschild / Abdichtzylinder5. Cooling shield / sealing cylinder
6. Außenring6. outer ring
7. Stirnplatte7. face plate
8. Innenring8. Inner ring
9. Stirnbereich9. forehead area
10. Kontaktstelle10. contact point
11. Kontaktstelle11. contact point
12. Schweißnaht12th weld
13. Schweißnaht 13th weld

Claims

Schutzansprüche protection claims
1. Kühlvorrichtung (4) für Elektroden (1 ) eines metallurgischen Ofens, wie Reduktionsofen, Lichtbogenofen, Induktionsofen usw., die mindestens eine Kontaktbacke (2) und einen Fassungsring (3) umschließt, bestehend aus einem Kühlschild / Abdichtzylinder (5), der in einen Stirnbereich (9) übergeht, der aus einem Außenring (6), einer Stirnplatte (7) und ei- nem Innenring (8) besteht, dadurch gekennzeichnet, dass der Stirnbereich (9) einteilig ausgebildet ist.A cooling apparatus (4) for electrodes (1) of a metallurgical furnace, such as a reduction furnace, an arc furnace, an induction furnace, etc., enclosing at least one contact jaw (2) and a socket ring (3) consisting of a cooling shield / sealing cylinder (5) merges into an end region (9), which consists of an outer ring (6), an end plate (7) and an inner ring (8), characterized in that the end region (9) is integrally formed.
2. Kühlvorrichtung (4) nach Anspruch 1 , dadurch gekennzeichnet, dass der Stirnbereich (9) im Querschnitt rechtwinklig ausgebildet sind.2. Cooling device (4) according to claim 1, characterized in that the end region (9) are formed at right angles in cross section.
3. Kühlvorrichtung (4) nach Anspruch 1 , dadurch gekennzeichnet, dass der Stirnbereich (9) im Querschnitt trapezförmig ausgebildet sind.3. Cooling device (4) according to claim 1, characterized in that the end region (9) are trapezoidal in cross-section.
4. Kühlvorrichtung (4) nach Anspruch 1 , dadurch gekennzeichnet, dass der Stirnbereich(9) im Querschnitt U - förmig ausgebildet sind4. Cooling device (4) according to claim 1, characterized in that the end region (9) in cross-section U - are formed
5. Kühlvorrichtung (4) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Stirnbereich (9) aus einem hochhitzebeständigen Werkstoff ausgebildet ist. 5. Cooling device (4) according to one of claims 1 to 4, characterized in that the end region (9) is formed of a highly heat-resistant material.
EP06776631A 2005-08-10 2006-08-04 Cooling device for the electrodes of a metallurgical furnace Active EP1891836B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005012571U DE202005012571U1 (en) 2005-08-10 2005-08-10 The cooling system for an industrial oven has a circular sealing ring comprising only one piece with no welding
PCT/EP2006/007761 WO2007017210A1 (en) 2005-08-10 2006-08-04 Cooling device for the electrodes of a metallurgical furnace

Publications (2)

Publication Number Publication Date
EP1891836A1 true EP1891836A1 (en) 2008-02-27
EP1891836B1 EP1891836B1 (en) 2008-11-05

Family

ID=35267876

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06776631A Active EP1891836B1 (en) 2005-08-10 2006-08-04 Cooling device for the electrodes of a metallurgical furnace

Country Status (9)

Country Link
US (1) US20100135351A1 (en)
EP (1) EP1891836B1 (en)
CN (1) CN101238755B (en)
AT (1) ATE413793T1 (en)
BR (1) BRPI0614331A2 (en)
DE (2) DE202005012571U1 (en)
NO (1) NO343429B1 (en)
WO (1) WO2007017210A1 (en)
ZA (1) ZA200800220B (en)

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Publication number Priority date Publication date Assignee Title
CN103619088B (en) * 2013-12-02 2015-07-15 中冶东方工程技术有限公司 Manufacturing method of water-cooling protection screen for submerged arc furnace

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US1677712A (en) * 1925-12-28 1928-07-17 Firm I G Farbenindustrie Ag Electrode holder
FR750542A (en) * 1933-02-10 1933-08-11 regulating equipment ensuring the sealing of the electrodes of electric ovens, and its mounting device
US2243096A (en) * 1939-06-29 1941-05-27 Stanford A Hardin Electrode seal
US2948765A (en) * 1957-04-17 1960-08-09 Elektrokemisk As Electrode holders for electric smelting furnaces
US4490825A (en) * 1982-09-27 1984-12-25 Lectromelt Corporation Water-cooled electrode
US4641320A (en) * 1982-12-16 1987-02-03 Northwestern Steel And Wire Company Shroud for furnace electrode
DE3340390A1 (en) * 1983-11-04 1985-05-23 Mannesmann AG, 4000 Düsseldorf HYDRAULIC PRESSURE ELEMENTS FOR ELECTRODES OF ELECTRO-OVENS
DE3400186C2 (en) * 1984-01-02 1987-01-08 Mannesmann AG, 4000 Düsseldorf Feedthrough for electrodes in a furnace cover of an electric arc or reduction furnace
DE3630861A1 (en) * 1986-09-08 1988-03-17 Mannesmann Ag ELECTRODE LAMP
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Title
See references of WO2007017210A1 *

Also Published As

Publication number Publication date
NO20080547L (en) 2008-02-06
US20100135351A1 (en) 2010-06-03
EP1891836B1 (en) 2008-11-05
DE502006002020D1 (en) 2008-12-18
CN101238755A (en) 2008-08-06
WO2007017210A1 (en) 2007-02-15
NO343429B1 (en) 2019-03-04
CN101238755B (en) 2011-06-08
DE202005012571U1 (en) 2005-10-27
ZA200800220B (en) 2008-12-31
ATE413793T1 (en) 2008-11-15
BRPI0614331A2 (en) 2011-03-22

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