EP0093070B1 - Sealing system for electrodes - Google Patents

Sealing system for electrodes Download PDF

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Publication number
EP0093070B1
EP0093070B1 EP83630066A EP83630066A EP0093070B1 EP 0093070 B1 EP0093070 B1 EP 0093070B1 EP 83630066 A EP83630066 A EP 83630066A EP 83630066 A EP83630066 A EP 83630066A EP 0093070 B1 EP0093070 B1 EP 0093070B1
Authority
EP
European Patent Office
Prior art keywords
electrode
packing
sealing system
furnace
seal ring
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
Application number
EP83630066A
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German (de)
French (fr)
Other versions
EP0093070A1 (en
Inventor
Georges Mathgen
Robert Scherer
Charles Prüm
Roger Leick
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.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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 Arbed SA filed Critical Arbed SA
Priority to AT83630066T priority Critical patent/ATE34501T1/en
Publication of EP0093070A1 publication Critical patent/EP0093070A1/en
Application granted granted Critical
Publication of EP0093070B1 publication Critical patent/EP0093070B1/en
Expired legal-status Critical Current

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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
    • H05B7/12—Arrangements for cooling, sealing or protecting electrodes

Definitions

  • the present invention relates to a sealing system for electrodes, in particular on an electric furnace with graphite electrodes working under a controlled atmosphere.
  • a furnace operating in a controlled atmosphere is preferably constructed so as to present a single gas exhaust duct in which an adjustable shutter device is normally installed, eg a valve or a butterfly valve which allows the adjustment of the pressure, independently of the gas insufflation flow rate in the furnace and of the evolution of gas from the molten materials.
  • the normally adopted solution provides a sealed bell which covers the electrodes with their suspension, drive and electrical supply systems and making it difficult to use a classic electrode holder.
  • the object of the present invention is to eliminate the disadvantages set out above and to provide a sealing system which makes the oven watertight at the place where the electrode enters the oven and which is capable of adapting to electrodes. performed with high tolerances and having pronounced irregularities.
  • the major advantage of the solution proposed by the present invention lies in the fact that the electrodes can be replaced quickly when hot without risking damage to the mechanical elements of the electrode drive system.
  • the spacing between these elements and the electrode may correspond to a distance representing several times the diameter of an electrode. It also creates the possibility of holding the electrodes by electrode arms of conventional construction, which is practically impossible in known systems.
  • the production downtime of the oven is minimal since the electrodes can be removed without having to wait for them to cool and with the minimum of maneuvers necessary to free the electrode from its claw and the seal where it enters the oven.
  • FIG. 1 shows one of the possible executions.
  • an electrode 1 at the point of penetration into the oven.
  • the tightness of the oven at this location is obtained by mounting a suitable packing 2 which is maintained by a stuffing box constituted by the elements 3, 4 and 5.
  • the packing 2 is constituted in the present case by two rings in carbon fibers with offset joints.
  • the cable gland is tightened using bolts 6. Part 5 of the cable gland sits in a cooling ring 7.
  • the seal between these two elements is guaranteed by one or two 0-seals indicated on fig. 1 by reference 8.
  • the cable gland is fixed to the cooling ring 7 using keys 9 passing through the support pins 10.
  • the cool ring 7 is itself mounted on an insulating ring 11. It is held by the bolts 12, themselves electrically insulated using the insulating rings 13. These bolts 12 attach all of the rings of the electrode to the plate 14, preferably made of steel, which constitutes the wall of separation between the furnace atmosphere and the open air. The seal between the last rings described is also achieved using 0 seals identified by the reference 15.
  • the metal plate 14 is itself protected against the heat of the oven, preferably by a mat of ceramic fibers 16.
  • a metal ring in 4 parts 17, is mounted below the elements 3, 4 and 5 constituting the cable gland. It will serve to maintain a minimum seal between the space 18 and the interior of the oven.
  • the space 18 will therefore have the function of an airlock which will preferably be kept under pressure by the injection of an inert gas (such as nitrogen), through the orifice 19 in the case of FIG. 1.
  • an inert gas such as nitrogen
  • This sheath 20 will preferably be cylindrical and concentric with the electrode. In the present case, it consists of two concentric cylindrical sleeves between which passes a spiral which serves to guide the cooling water supplied by line 21 and discharged through line 22.
  • a third ring 23 around the electrode 1 protects the upper rings against radiation from inside the oven.
  • This ring 23 consists of several segments 24, six in this case, which pivot about axes 25 to which they are suspended. The center of gravity of each segment will be farther from the axis of the electrode than its tilt axis so that it is pushed towards the electrode by its own weight.
  • This solution has the advantage of allowing these segments to best dust the shape of the sand electrode to prevent slight misalignment thereof.
  • the ring 23 we will in fact be able to limit the lateral movement of the electrode inside the packing, this in order to guarantee the effectiveness of -this and in order to reduce its wear following the vertical movement of the electrode.
  • the rings 3, 4 and 5 constituting the cable gland are each split into two equal halves in the direction of the axis of the electrode. They will however be mounted so that the axis of the cut is moved from one ring to the other, which means that the cable gland assembled with the bolts 6 forms a practically rigid whole.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Furnace Details (AREA)
  • Discharge Heating (AREA)
  • Organic Insulating Materials (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Luminescent Compositions (AREA)
  • Secondary Cells (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Sealing Material Composition (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Sealing Devices (AREA)

Abstract

A seal for use around a rod electrode passing along an axis through a hole in the wall of a furnace into the interior of the furnace has an annular and at least limitedly flexible seal ring fitted snugly around the electrode in the hole and a holder carrying the seal ring and sealingly engaged with the furnace wall. Thus gas flow through the wall at the hole past the seal ring is substantially blocked. The seal assembly has structure forming with the electrode and seal ring a substantially closed chamber surrounding the electrode axially inward into the furnace from the ring. This chamber is pressurized at superatmospheric pressure with an inert gas and the electrode is cooled inward of the furnace from the seal ring. The seal ring is compressed axially by a packing assembly so it is pressed radially against the electrode. The packing includes rigid split compression rings bearing axially on the seal ring.

Description

La présente invention concerne un système d'étoupage pour électrodes, notamment sur four électrique à électrodes en graphite travaillant sous atmosphère contrôlée. Un four opérant sous atmosphère contrôlée est construit de préférence de façon à présenter un unique conduit d'échappement des gaz dans lequel on installe normalement un dispositif d'obturation réglable, p.ex. un clapet ou une vanne-papillon qui permet le réglage de la pression, indépendamment du débit d'insufflation de gaz dans le four et du dégagement de gaz des matières en fusion.The present invention relates to a sealing system for electrodes, in particular on an electric furnace with graphite electrodes working under a controlled atmosphere. A furnace operating in a controlled atmosphere is preferably constructed so as to present a single gas exhaust duct in which an adjustable shutter device is normally installed, eg a valve or a butterfly valve which allows the adjustment of the pressure, independently of the gas insufflation flow rate in the furnace and of the evolution of gas from the molten materials.

Pour rendre étanche un tel four en dehors de la conduite d'échappement des gaz la solution adoptée normalement prévoit une cloche étanche qui couvre les électrodes avec leurs systèmes de suspension, d'entraînement et d'alimentation électrique et rendant difficile l'utilisation d'un porte électrodes classique.To seal such an oven outside the gas exhaust pipe, the normally adopted solution provides a sealed bell which covers the electrodes with their suspension, drive and electrical supply systems and making it difficult to use a classic electrode holder.

Cette solution a l'avantage de permettre l'utilisation de joints toriques. Le désavantage est cependant que le système de suspension et d'entraînement de l'électrode doit être construit de façon très compacte pour limiter les dimensions de la cloche. De ce fait les éléments fragiles du système de suspension des électrodes et de leur alimentation électrique doivent être placés à proximité des électrodes et ne peuvent être protégés efficacement contre la chaleur dégagée par celles-ci.This solution has the advantage of allowing the use of O-rings. The disadvantage is, however, that the electrode suspension and drive system must be constructed in a very compact manner to limit the dimensions of the bell. Therefore the fragile elements of the suspension system of the electrodes and their electrical supply must be placed near the electrodes and cannot be effectively protected against the heat given off by them.

D'après le brevet US-A-3 697 660 il est connu de prévoir à l'endroit de pénétration de l'électrode dans le four, un bourrage comprimé entourant l'élctrode, une chambre alimentée en gaz sous pression, entourant l'électrode et située entre le bourrage et l'intérieur du four ainsi que les moyens de refroidissement avoisinant ladite chambre, l'électrode et le bourrage.According to US Pat. No. 3,697,660, it is known to provide at the place of penetration of the electrode into the furnace, a compressed stuffing surrounding the electrode, a chamber supplied with gas under pressure, surrounding the electrode and located between the stuffing and the interior of the oven as well as the cooling means surrounding said chamber, the electrode and the stuffing.

La présente invention a pour but d'éliminer les désavantages exposés plus haut et de proposer un système d'étoupage qui rend le four étanche à l'endroit où l'électrode pénètre dans le four et qui est capable de s'adapter à des électrodes réalisées avec des tolérances élevées et possédant des irrégularités prononcées.The object of the present invention is to eliminate the disadvantages set out above and to provide a sealing system which makes the oven watertight at the place where the electrode enters the oven and which is capable of adapting to electrodes. performed with high tolerances and having pronounced irregularities.

Ce but est atteint grâce au système selon l'invention tel qu'il est caractérisé dans la revendication indépendante. Des variantes d'exécution préférentielles sont décrites dans les revendications dependantes.This object is achieved by the system according to the invention as characterized in the independent claim. Preferential variant embodiments are described in the dependent claims.

L'avantage majeur de la solution proposée par la présente invention réside dans le fait que les électrodes peuvent être remplacées rapidement à chaud sans risquer d'endommager les éléments mécaniques du système d'entraînement des électrodes. L'écartement entre ces éléments et l'électrode pourra correspondre à une distance représentant plusieurs fois le diamètre d'une électrode. On crée en outre la possibilité de maintenir les électrodes par des bras porte-électrodes de construction classique, ce qui est pratiquement impossible dans les systèmes connus. Lors d'un changement d'électrodes le temps d'arrêt de production du four est minimal puisque les électrodes peuvent être retirées sans devoir attendre qu'elles refroidissent et avec un minimum de manoeuvres nécessaires pour libérer l'électrode de sa griffe et du joint à l'endroit de pénétration dans le four.The major advantage of the solution proposed by the present invention lies in the fact that the electrodes can be replaced quickly when hot without risking damage to the mechanical elements of the electrode drive system. The spacing between these elements and the electrode may correspond to a distance representing several times the diameter of an electrode. It also creates the possibility of holding the electrodes by electrode arms of conventional construction, which is practically impossible in known systems. When changing the electrodes the production downtime of the oven is minimal since the electrodes can be removed without having to wait for them to cool and with the minimum of maneuvers necessary to free the electrode from its claw and the seal where it enters the oven.

L'invention sera décrite en déail à l'aide de la fig. 1 qui montre une des exécutions possibles.The invention will be described in detail using FIG. 1 which shows one of the possible executions.

Il y est représenté une électrode 1 à l'endroit de pénétration dans le four. L'étanchéité du four à cet endroit est obtenue par le montage d'un bourrage adéquat 2 qui est maintenu par un presse-étoupe constitué par les éléments 3, 4 et 5. Le bourrage 2 est constitué dans le cas présent par deux anneaux en fibres de carbone à joints décalés. Le serrage du presse-étoupe se fait à l'aide des boulons 6. La partie 5 du presse-étoupe est assise dans un anneau de refroidissement 7. L'étanchéité entre ces deux éléments est garantie par un ou deux joints en 0 indiqués sur la fig. 1 par la référence 8.There is shown an electrode 1 at the point of penetration into the oven. The tightness of the oven at this location is obtained by mounting a suitable packing 2 which is maintained by a stuffing box constituted by the elements 3, 4 and 5. The packing 2 is constituted in the present case by two rings in carbon fibers with offset joints. The cable gland is tightened using bolts 6. Part 5 of the cable gland sits in a cooling ring 7. The seal between these two elements is guaranteed by one or two 0-seals indicated on fig. 1 by reference 8.

Le presse-étoupe est fixé à l'anneau de refroidissement 7 à l'aide de clavettes 9 passant par les axes de support 10.The cable gland is fixed to the cooling ring 7 using keys 9 passing through the support pins 10.

L'anneau de refroidissent 7 est lui-même monté sur un anneau 11 isolant. Il est maintenu par les boulons 12, isolés eux-mêmes électriquement à l'aide des bagues isolantes 13. Ces boulons 12 attachent l'ensemble des anneaux de l'électrode à la plaque 14, en acier de préférence, que constitue la paroi de séparation entre l'atmosphère du four et l'air libre. L'étanchéité entre les derniers anneaux décrits est également réalisée à l'aide de joints en 0 repérés par la référence 15. La plaque métallique 14 est elle-même protégée contre la chaleur du four, de préférence par une matte en fibres céramiques 16.The cool ring 7 is itself mounted on an insulating ring 11. It is held by the bolts 12, themselves electrically insulated using the insulating rings 13. These bolts 12 attach all of the rings of the electrode to the plate 14, preferably made of steel, which constitutes the wall of separation between the furnace atmosphere and the open air. The seal between the last rings described is also achieved using 0 seals identified by the reference 15. The metal plate 14 is itself protected against the heat of the oven, preferably by a mat of ceramic fibers 16.

Selon une version préférée de l'invention un anneau métallique en 4 parties 17, est monté en dessous des éléments 3, 4 et 5 constituant le presse-étoupe. Il servira à maintenir une étanchéité minimale entre l'espace 18 et l'intérieur du four. L'espace 18 aura donc la fonction d'un sas qui sera de préférence maintenu sous pression par l'injection d'un gaz inerte (comme l'azote), par l'orifice 19 dans le cas de la fig. 1.According to a preferred version of the invention a metal ring in 4 parts 17, is mounted below the elements 3, 4 and 5 constituting the cable gland. It will serve to maintain a minimum seal between the space 18 and the interior of the oven. The space 18 will therefore have the function of an airlock which will preferably be kept under pressure by the injection of an inert gas (such as nitrogen), through the orifice 19 in the case of FIG. 1.

Ainsi, même dans la cas où le bourrage ne constituait pas un joint parfaitement étanche, le danger de pénétration d'air dans le four est pratiquement exclu tant que la pression du sas est supérieure à celle de l'atmosphère extérieure du four. Le gaz neutre en contact avec le bourrage en carbone élimine toute oxydation de celui-ci en présence d'une électrode surchauffée.Thus, even in the case where the stuffing did not constitute a perfectly tight seal, the danger of air penetration into the oven is practically excluded as long as the airlock pressure is higher than that of the outside atmosphere of the oven. The neutral gas in contact with the carbon stuffing eliminates any oxidation thereof in the presence of an overheated electrode.

Pour limiter la température de l'électrode au niveau du presse-étoupe il est préférable d'installer une gaine refroidie autour de l'électrode. Cette gaine 20 sera de préférence cylindrique et concentrique à l'électrode. Dans le cas présent elle est constituée par deux manchons cylindriques concentriques entre lesquels passe une spirale qui sert à guider l'eau de refroidissement amenée par la conduite 21 et évacuée par la conduite 22.To limit the temperature of the electrode at the level of the cable gland, it is preferable to install a cooled sheath around the electrode. This sheath 20 will preferably be cylindrical and concentric with the electrode. In the present case, it consists of two concentric cylindrical sleeves between which passes a spiral which serves to guide the cooling water supplied by line 21 and discharged through line 22.

Dans une version préférée de la présente invention, un troisième anneau 23 autour de l'électrode 1 protège les anneaux supérieurs contre le rayonnement provenant de l'intérieur du four. Cet anneau 23 est constitué de plusieurs segments 24, six dans le cas présent, qui pivotent autour d'axes 25 auxquels ils sont suspendus. Le centre de gravité de chaque segment sera plus éloigné de l'axe de l'électrode que son axe de basculement pour qu'il soit poussé vers l'électrode par son propre poids.In a preferred version of the present invention, a third ring 23 around the electrode 1 protects the upper rings against radiation from inside the oven. This ring 23 consists of several segments 24, six in this case, which pivot about axes 25 to which they are suspended. The center of gravity of each segment will be farther from the axis of the electrode than its tilt axis so that it is pushed towards the electrode by its own weight.

Cette solution présente l'avantage de permettre à ces segments d'épousser au mieux la forme de l'électrode sand interdire un léger désalignement de celle-ci.This solution has the advantage of allowing these segments to best dust the shape of the sand electrode to prevent slight misalignment thereof.

Pour empêcher cependant qu'une électrode, montée légèrement en obique par rapport à son axe théorique 25, n'entre en contact avec des parties du four qui ne sont pas destinées à la guider et à la maintenir en position, on a avantage à prévoir des taquets 27 qui limitent l'angle de basculement des segments 24. Ainsi l'électrode est maintenue, d'une part, par le bras porte-électrode et, d'autre part, par l'anneau 23, tel que l'angle entre l'axe effectif et l'axe théorique de l'électrode ne pourra dépasser une valeur maximum déterminée.To prevent, however, that an electrode, mounted slightly at an angle relative to its theoretical axis 25, does not come into contact with parts of the furnace which are not intended to guide and maintain it in position, it is advantageous to provide tabs 27 which limit the tilting angle of the segments 24. Thus the electrode is held, on the one hand, by the electrode-carrying arm and, on the other hand, by the ring 23, such as the angle between the effective axis and the theoretical axis of the electrode may not exceed a determined maximum value.

Ceci est surtout important dans le cas où le four est pivotable, c.à.d. quand l'axe théorique de l'électrode n'est pas toujours vertical.This is especially important in the case where the oven is rotatable, i.e. when the theoretical axis of the electrode is not always vertical.

Avec, en haut, un bras porte-électrode bien guidé et en bas, l'anneau 23 on arrivera en effect à limiter le mouvement latéral de l'électrode à l'intérieur du bourrage, ceci en vue de garantir l'efficacité de celui-ci et afin de réduire son usure suite au mouvement vertical de l'électrode.With, at the top, a well-guided electrode-carrying arm and at the bottom, the ring 23 we will in fact be able to limit the lateral movement of the electrode inside the packing, this in order to guarantee the effectiveness of -this and in order to reduce its wear following the vertical movement of the electrode.

Selon une version préférée de l'invention, les anneaux 3, 4 et 5 constituant le presse-étoupe sont chacun scindés en deux moitiés égales dans le sens de l'axe de l'électrode. Ils seront cependant montés de sorte à ce que l'axe de la découpe soit déplacé d'un anneau à l'autre ce qui fait que le presse-étoupe assemblé à l'aide des boulons 6 forme un tout pratiquement rigide.According to a preferred version of the invention, the rings 3, 4 and 5 constituting the cable gland are each split into two equal halves in the direction of the axis of the electrode. They will however be mounted so that the axis of the cut is moved from one ring to the other, which means that the cable gland assembled with the bolts 6 forms a practically rigid whole.

En adoptant ce type de presse-étoupe il est possible de détacher tous ses éléments 2, 3, 4 et 5 de l'électrode usée sans devoir les faire glisser le long de l'électrode pour les ôter ce qui présente un sérieux avantage dans la pratique.By adopting this type of cable gland it is possible to detach all of its elements 2, 3, 4 and 5 from the spent electrode without having to slide them along the electrode to remove them, which has a serious advantage in convenient.

Claims (9)

1. A sealing system for electrodes (1), in particular for electrodes mounted on an electric furnace operating in a controlled atmosphere, comprising, at the point where the electrode (1) penetrates into the furnace, a compressed packing (2) surrounding the electrode (1), a chamber (18) supplied with compressed gas, surrounding the electrode (1) and placed between the said packing and the inside of the furnace together with cooling means adjacent to the said chamber (18), the electrode (1) and the packing (2), characterised
in that the packing (2) is encased in a packing box formed by elements (3, 4, 5) which are annular in form, tightening means (6) being provided for compressing the said packing (2) inside the said packing box (3, 4, 5), the latter being enclosed in a cooling ring (7) in a sealing-tight manner,
in that the chamber (18) supplied with compressed gas, is in particular defined by the packing (2), by the body of the electrode (1), by a partition associated with the cooling means and towards the furnace, by a metal ring (17) in at least two parts abutting the electrode,
in that the cooling means also comprise, near the ring (7) surrounding the packing (2), a sheathing (20) surrounding the electrode, the said sheathing being situated between the said chamber (18) and the active part of the electrode, and
in that a ring (23), surrounding the electrode (1) almost completely and consisting of at least two segments (24), is situated between the active part of the electrode (1) and said sheathing (20).
2. A sealing system according to claim 1, characterised in that the packing (2) consists of two rings, one on top of the other, abutting the electrode (1).
3. A sealing system according to the claims 1 or 2, characterised in that the packing (2) consists partly of carbon or graphite fibers.
4. A sealing system according to one of the claims 1-3, characterised in that the annular elements (3, 4, 5) of the packing box are each divided in the direction of the electrode axis into two preferably equal parts.
5. A sealing system according to claim 4, charcaterised in that the tightening means (6) are screw-bolts.
6. A sealing system according to claim 1, characterised in that the sheathing (20) consists of two concentric cylindrical jackets, a spiral for guiding the cooling fluid being located between them.
7. A sealing system according to claim 1, characterised in that each segment (24) can pivot upon an axis (25) and has its center of gravity separated from its pivot, so that the center of gravity (24) is farther away from the theoretical axis of the electrode (1) than said pivot.
8. A sealing system according to claim 7, characterised in that it has six segments (24).
9. A sealing system according to claim 7, characterised in that stoppers (27) limit the pivoting movement of the segments (24).
EP83630066A 1982-04-22 1983-04-18 Sealing system for electrodes Expired EP0093070B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83630066T ATE34501T1 (en) 1982-04-22 1983-04-18 SEALING SYSTEM FOR ELECTRODES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84104 1982-04-22
LU84104A LU84104A1 (en) 1982-04-22 1982-04-22 SEALING SYSTEM FOR ELECTRODES

Publications (2)

Publication Number Publication Date
EP0093070A1 EP0093070A1 (en) 1983-11-02
EP0093070B1 true EP0093070B1 (en) 1988-05-18

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EP83630066A Expired EP0093070B1 (en) 1982-04-22 1983-04-18 Sealing system for electrodes

Country Status (10)

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US (1) US4457002A (en)
EP (1) EP0093070B1 (en)
JP (1) JPS58188092A (en)
AT (1) ATE34501T1 (en)
CA (1) CA1231997A (en)
DE (1) DE3376731D1 (en)
DK (1) DK76583A (en)
FI (1) FI76473C (en)
LU (1) LU84104A1 (en)
NO (1) NO159317C (en)

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US6377605B1 (en) * 2001-03-02 2002-04-23 Hatch Associates Ltd. Electrode seal for arc furnace
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US8613782B2 (en) * 2009-05-26 2013-12-24 Inentec Inc. Regenerator for syngas cleanup and energy recovery in gasifier systems
FI122225B (en) * 2009-08-04 2011-10-14 Outotec Oyj SEALING DEVICE
JP6813817B2 (en) * 2015-12-29 2021-01-13 ヴェオリア ニュークリア ソリューションズ インコーポレイテッドＶｅｏｌｉａ Ｎｕｃｌｅａｒ Ｓｏｌｕｔｉｏｎｓ Ｉｎｃ． Systems and methods for electrode seal assemblies
CN111578719B (en) * 2020-06-16 2024-05-14 中冶赛迪工程技术股份有限公司 Sealing device for electric furnace electrode

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US4377289A (en) * 1980-04-22 1983-03-22 Qit-Fer Et Titane Inc. Furnace electrode seal assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4342511A1 (en) * 1993-12-08 1995-06-14 Mannesmann Ag Electric reduction furnace with open slag bath

Also Published As

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US4457002A (en) 1984-06-26
ATE34501T1 (en) 1988-06-15
NO159317C (en) 1988-12-14
DK76583D0 (en) 1983-02-22
FI830435L (en) 1983-10-23
FI76473B (en) 1988-06-30
JPS58188092A (en) 1983-11-02
DK76583A (en) 1983-10-23
EP0093070A1 (en) 1983-11-02
NO159317B (en) 1988-09-05
CA1231997A (en) 1988-01-26
FI830435A0 (en) 1983-02-08
NO831416L (en) 1983-10-24
LU84104A1 (en) 1984-03-02
FI76473C (en) 1988-10-10
DE3376731D1 (en) 1988-06-23

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