EP0071517A1 - Arrangement for connecting and supporting a cooled composite electrode of an electric-arc furnace - Google Patents

Arrangement for connecting and supporting a cooled composite electrode of an electric-arc furnace Download PDF

Info

Publication number
EP0071517A1
EP0071517A1 EP82401353A EP82401353A EP0071517A1 EP 0071517 A1 EP0071517 A1 EP 0071517A1 EP 82401353 A EP82401353 A EP 82401353A EP 82401353 A EP82401353 A EP 82401353A EP 0071517 A1 EP0071517 A1 EP 0071517A1
Authority
EP
European Patent Office
Prior art keywords
metal column
electrode
bus
electric
arc furnace
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.)
Withdrawn
Application number
EP82401353A
Other languages
German (de)
French (fr)
Inventor
Jean Davene
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.)
Clesid SA
Original Assignee
Clesid 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 Clesid SA filed Critical Clesid SA
Publication of EP0071517A1 publication Critical patent/EP0071517A1/en
Withdrawn legal-status Critical Current

Links

Images

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

Definitions

  • the present invention relates to a device intended for electrical connection, for hydraulic connection, and for mechanical support of a cooled composite electrode for an electric arc furnace intended for example to equip a steelworks.
  • connection and support device does not have these drawbacks. It is characterized in that it comprises a lateral head adjoining to. the upper metal column of the electrode and allowing its attachment to the end of an electrode-carrying arm, in that said metal column is provided at its upper part with at least one member allowing its connection to the bus-tubes of 'electric current and coolant supply, and in that it is provided with means for hydraulically connecting the hollow inner part. of each bus tube respectively at the inlet and at the outlet of the coolant circulation circuit passing inside said metal column.
  • FIG. 1 schematically represents a composite electrode according to the invention, conventionally comprising a lower body 1 in the form of a graphite column, and an upper body 2 in the form of a metal column, hollow and cooled, by circulation of water.
  • the upper part of the electrode has a head.
  • lateral 3 also metallic and welded to the metallic column 2, this lateral head being intended to be bolted to the electrode-carrying arm 4, of which only the end has been shown in the drawing.
  • the metal column 2 is extended at its upper part by two appendages (5,6) hollow and of rectangular section, forming an electrode tail and therefore intended for. both at connection column 2 to the bus bars 7 for supplying the electric current and the cooling water, a single bus bar 7 having been shown in the drawing, and to the supply as well as to the return from. cooling water in and out. of the metal column 2.
  • each bus bar 7 has one. flattened end 70 called lug.
  • Each terminal such as 70 is pierced longitudinally with a channel 71 of sufficient section to allow the flow of cooling water supplied by the inner channel of one of the two bars to pass.
  • the electrical contact between the terminal 70 and the corresponding appendix 5 is made by clamping one on the other at. using eight tie rods 8 and two clamping plates 9.
  • the continuity of the hydraulic circuit is ensured for each lug-appendage pair by a tube, such as the tube 10 shown, connecting the upstream end of the channel 50 passing through the corresponding appendix 5, to the downstream end of the channel 71 passing through the lug. 70.
  • FIG. 3 shows, purely for description, the conventional circuit in itself, for cooling the metal column 2.
  • the circuit traversed by the cooling water is indicated by arrows.

Landscapes

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

Abstract

Device intended for the electrical connecting, the hydraulic connecting, and the mechanical supporting of a cooled composite electrode for an electric-arc furnace. It comprises a lateral head (3) adjoining the upper metal column (2) of the electrode and allowing fixing thereof to the end of the electrode-holder arm (4), the said metal column being extended at its upper part by at least two hollow metal appendages (5, 6) allowing the joining of the said metal column, on the one hand to the bus-tubes (7) for conveying the electric current, and on the other hand to the cooling liquid circulating circuit passing inside these bus-tubes as well as inside the said metal column. <IMAGE>

Description

La présente invention se rapporte à un dispositif destiné à la connexion électrique, à la connexion hydraulique, et au supportage mécanique d'une électrode composite refroidie pour un four électrique à arcs destiné par exemple à équiper une aciérie.The present invention relates to a device intended for electrical connection, for hydraulic connection, and for mechanical support of a cooled composite electrode for an electric arc furnace intended for example to equip a steelworks.

On connaît, entre autres du brevet U.S. 4.121.042, des électrodes refroidies dites "composites". Ces électrodes, qui comportent une partie supérieure. métallique et refroidie par circulation d'eau et une partie. inférfeure en graphite., permettent des diminutions sensibles de consommation de graphite. La connexion électrique et le support de l'électrode sont assurés par une pince enserrant la partie métallique de l'électrode, ladite pince étant le plus souvent refroidie par circulation d'eau.Known, inter alia from U.S. Patent 4,121,042, so-called "composite" cooled electrodes. These electrodes, which have an upper part. metallic and cooled by water circulation and a part. inferior to graphite., allow significant reductions in graphite consumption. The electrical connection and the electrode support are provided by a clamp enclosing the metal part of the electrode, said clamp being most often cooled by circulation of water.

Ces dispositifs connus présentent quelques inconvénients :

  • - le dispositif de support et connexion à pince est de construction mécanique encombrante., ce qui ne permet pas de rapprocher suffisamment les électrodes les unes des autres. Or, on sait que plus on rapproche les électrodes les unes des autres, plus. on diminue la réactance du four et les pertes électriques, donc plus on augmente son rendement.
  • - la pince enserrant la partie métallique de l'électrode, on court le risque que le contact électrique ne se fasse que selon une. génératrice. On doit donc, pour éviter ce risque., placer un insert annulaire en graphite dans la pince, afin d'assurer un contact large sans problèmes. La connexion électrique entre la barre-ominbus d'amenée du courant et l'électrode passe alors par trois contacts successifs : un premier contact entre la cosse du tube-omnibus et la queue de pince,
  • . un second contact entre la pince et l'insert en graphite, un troisième contact entre l'insert en graphite et l'électrode.
  • - comme il est en général nécessaire de refroidir aussi bien l'électrode que la pince, on doit prévoir deux circuits de refroidissement ce qui conduit à des installations complexes et onéreuses.
These known devices have some drawbacks:
  • - The support device and clamp connection is cumbersome mechanical construction., which does not allow to bring the electrodes sufficiently close to each other. Now, we know that the closer we get the electrodes to each other, the more. the reactance of the furnace and the electrical losses are reduced, therefore the more its efficiency is increased.
  • - the clamp enclosing the metal part of the electrode, there is the risk that the electrical contact is made only in one. generator. To avoid this risk, an annular graphite insert must therefore be placed in the pliers to ensure wide contact without problems. The electrical connection between the busbar and the electrode then passes through three successive contacts: a first contact between the terminal of the bus tube and the tail of the clamp,
  • . a second contact between the pliers and the graphite insert, a third contact between the graphite insert and the electrode.
  • - as it is generally necessary to cool both the electrode and the clamp, two cooling circuits must be provided for this which leads to complex and expensive installations.

Le dispositif de connexion et de support selon l'invention ne présente pas ces inconvénients. Il est caractérisé en ce qu'il comporte une tête latérale attenante à. la colonne métallique supérieure de l'électrode et permettant sa fixation à l'extrémité d'un bras porte-électrode,en ce que ladite colonne métallique est munie à sa partie supérieure d'au moins um organe permettant sa connexion aux tubes-omnibus d'amenée de courant électrique et de liquide de refroidissement, et en ce qu'il est muni de moyens permettant de connecter hydrauliquement la partie intérieure creuse. de chaque tube-omnibus respectivement à l'entrée et à la sortie du circuit de circulation de liquide de refroidissement passant à l'intérieur de ladite colonne métallique.The connection and support device according to the invention does not have these drawbacks. It is characterized in that it comprises a lateral head adjoining to. the upper metal column of the electrode and allowing its attachment to the end of an electrode-carrying arm, in that said metal column is provided at its upper part with at least one member allowing its connection to the bus-tubes of 'electric current and coolant supply, and in that it is provided with means for hydraulically connecting the hollow inner part. of each bus tube respectively at the inlet and at the outlet of the coolant circulation circuit passing inside said metal column.

L'invention sera mieux comprise à l'aide de la description suivante d'un exemple non limitatif de réalisation, en référence aux dessins annexés dans lesquels

  • -la figure 1 est une vue en perspective partiellement éclatée d'une électrode composite de four électrique connectée conformément à l'invention.
  • - la figure 2 est une coupe partielle selon la direction AA' de la figure 1 et montrant une des deux connexions"queue d'électrode-cosse de tube omnibus".
  • - la figure 3 est une coupe longitudinale partielle de l'électrode composite de la figure 1, montrant la circulation du liquide de refroidissement dans le corps de celle-ci.
The invention will be better understood with the aid of the following description of a nonlimiting exemplary embodiment, with reference to the appended drawings in which
  • FIG. 1 is a partially exploded perspective view of a composite electrode of an electric oven connected in accordance with the invention.
  • - Figure 2 is a partial section along the direction AA 'of Figure 1 and showing one of the two connections "tail of electrode-bus tube lug".
  • - Figure 3 is a partial longitudinal section of the composite electrode of Figure 1, showing the circulation of the coolant in the body thereof.

La figure 1 représente schématiquement une électrode composite conforme à l'invention, comportant classiquement un corps inférieur 1 en forme de colonne en graphite, et un corps supérieur 2 en forme de col- lonne métallique, creux et refroidi, par circulation d'eau.FIG. 1 schematically represents a composite electrode according to the invention, conventionally comprising a lower body 1 in the form of a graphite column, and an upper body 2 in the form of a metal column, hollow and cooled, by circulation of water.

Conformément à l'invention, la partie supérieure de l'électrode camporte une tête. latérale 3, également métallique et soudée à la colen- ne métallique 2, cette tête latérale étant destinée à être boulonnée au bras porte-électrode 4, dont seule l'extrémité a été représentée sur le dessin. Par ailleurs, la colonne métallique 2 est prolongée à sa partie supérieure par deux appendices (5,6) creux et de section rectangulaire, formant queue-d'électrode et donc destinés à. la fois au raccordement électrique de la colonne 2 aux barres-omnibus 7 d'amenée du courant électrique et de l'eau de refroidissement, une seule barre omnibus 7 ayant été représentée sur le dessin, et à l'amenée ainsi qu'au retour de. l'eau de refroidissement dans et hors. de la colonne métallique 2.According to the invention, the upper part of the electrode has a head. lateral 3, also metallic and welded to the metallic column 2, this lateral head being intended to be bolted to the electrode-carrying arm 4, of which only the end has been shown in the drawing. Furthermore, the metal column 2 is extended at its upper part by two appendages (5,6) hollow and of rectangular section, forming an electrode tail and therefore intended for. both at connection column 2 to the bus bars 7 for supplying the electric current and the cooling water, a single bus bar 7 having been shown in the drawing, and to the supply as well as to the return from. cooling water in and out. of the metal column 2.

La connexion électrique et le circuit de refroidissement seront maintenant décrits plus en détails à l'aide également des figures 2 et 3 :The electrical connection and the cooling circuit will now be described in more detail, also with the aid of FIGS. 2 and 3:

Comme on le voit sur les dessins, chaque barre-omnibus 7 possède une. extrémité aplatie 70 appelée cosse. Chaque cosse telle que 70 est percée longitudinalement d'un canal 71 de section suffisante pour laisser passer le débit d'eau de refroidissement amené par le canal intérieur d'une des deux barres. omnibus 7. Le contact électrique entre la cosse 70 et l'appendice 5 correspondant se fait par serrage de l'un sur l'autre à. l'aide de huit tirants 8 et de deux plaques de serrage 9.As seen in the drawings, each bus bar 7 has one. flattened end 70 called lug. Each terminal such as 70 is pierced longitudinally with a channel 71 of sufficient section to allow the flow of cooling water supplied by the inner channel of one of the two bars to pass. omnibus 7. The electrical contact between the terminal 70 and the corresponding appendix 5 is made by clamping one on the other at. using eight tie rods 8 and two clamping plates 9.

La continuité du circuit hydraulique est assurée pour chaque couple cosse-appendice par un tube, tel que le tube 10 représenté, raccordant l'extrémité amont du canal 50 parcourant l'appendice 5 correspondant, à l'extrémité aval du canal 71 parcourant la cosse 70.The continuity of the hydraulic circuit is ensured for each lug-appendage pair by a tube, such as the tube 10 shown, connecting the upstream end of the channel 50 passing through the corresponding appendix 5, to the downstream end of the channel 71 passing through the lug. 70.

La figure 3 montre, à titre purement descriptif, le circuit classique en soi, de refroidissement de la colonne métallique 2. Sur cette figure, le circuit parcouru par l'eau de refroidissement est indiqué par des flèches. On y distingue en outre la pièce de raccordement bi-tronconique 11 entre la colonne métallique supérieure 2 et la colonne inférisure 1 en graphite, cet élément étant également connu en soi.FIG. 3 shows, purely for description, the conventional circuit in itself, for cooling the metal column 2. In this figure, the circuit traversed by the cooling water is indicated by arrows. We can also see the bi-frusto-conical connecting piece 11 between the upper metal column 2 and the lower column 1 made of graphite, this element also being known per se.

Claims (2)

1. Dispositif de connexion et de support d'électrode composite refroidie pour four électrique à arcs, caractérisé en ce qu'il comporte une tête latérale (3) attenante à la colonne métallique supérieure (2) de l'électrode et permettant sa fixation à l'extrémité du bras porte-électrode (4), en ce que ladite colonne métallique est munie à sa partie sapérieure d'au moins un organe (5,6) permettant sa connexion élec- triqua aux tubes-omnibus(7) d'amenée de courant électrique et de liquide de refroidissement, et en ce qu'il est muni de moyensC(10) permettant de connecter hydrauliquement la partie intérieure creuse de chaque tube-omnibus respectivement à l'entrée et à la sortie du circuit de circulation de liquide de refroidissement passant à l'intérieur de ladite colonne métallique.1. Connection and support device for a cooled composite electrode for an electric arc furnace, characterized in that it comprises a lateral head (3) adjoining the upper metal column (2) of the electrode and allowing it to be fixed to the end of the electrode-carrying arm (4), in that said metal column is provided at its lower part with at least one member (5,6) allowing its electrical connection to the bus-tubes (7) of supply of electric current and coolant, and in that it is provided with means C (10) making it possible to hydraulically connect the hollow interior part of each bus-tube respectively to the inlet and the outlet of the circulation circuit of coolant passing inside said metal column. 2. Dispositif selon la revendication 1, caractérisé en ce que lesdits organes sont des appendices métalliques creux (5,6) prolongeant la partie supérieure de ladite colonne métallique, et en ce que ces appendices creux constituent les canaux d'entrée et de sortie dudit circuit de refroidissement de la colonne métallique.2. Device according to claim 1, characterized in that said members are hollow metal appendages (5,6) extending the upper part of said metal column, and in that these hollow appendages constitute the inlet and outlet channels of said metal column cooling circuit.
EP82401353A 1981-07-24 1982-07-21 Arrangement for connecting and supporting a cooled composite electrode of an electric-arc furnace Withdrawn EP0071517A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8114395 1981-07-24
FR8114395A FR2510338A1 (en) 1981-07-24 1981-07-24 DEVICE FOR CONNECTING AND SUPPORTING COOLED COMPOSITE ELECTRODE FOR ARC ELECTRIC OVEN

Publications (1)

Publication Number Publication Date
EP0071517A1 true EP0071517A1 (en) 1983-02-09

Family

ID=9260824

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401353A Withdrawn EP0071517A1 (en) 1981-07-24 1982-07-21 Arrangement for connecting and supporting a cooled composite electrode of an electric-arc furnace

Country Status (4)

Country Link
EP (1) EP0071517A1 (en)
JP (1) JPS5826491A (en)
ES (1) ES513338A0 (en)
FR (1) FR2510338A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122120A2 (en) * 1983-04-07 1984-10-17 British Steel Corporation Improvements in or relating to electric arc furnaces
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
NO343580B1 (en) * 2005-10-10 2019-04-08 Fai Production Contact plate for electrometallurgical melting furnace electrode and method for producing it.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2147061B1 (en) * 1996-10-31 2001-04-01 Fundacion Inasmet PLASMA TORCH PERFECTED WITH FAST SPARE REFRIGERATED ELECTRODE.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB959457A (en) * 1900-01-01
DE319442C (en) * 1920-03-13 Stickstoffduenger Ag F Head contact socket for furnace electrodes
US2775811A (en) * 1955-05-19 1957-01-01 James G Wilson Methods for forming contact surfaces
US2857545A (en) * 1952-08-13 1958-10-21 Elektrokemisk As Arrangement of the vertical contact rods of selfbaking anodes in furnace for electrolytic recovery of aluminium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB959457A (en) * 1900-01-01
DE319442C (en) * 1920-03-13 Stickstoffduenger Ag F Head contact socket for furnace electrodes
US2857545A (en) * 1952-08-13 1958-10-21 Elektrokemisk As Arrangement of the vertical contact rods of selfbaking anodes in furnace for electrolytic recovery of aluminium
US2775811A (en) * 1955-05-19 1957-01-01 James G Wilson Methods for forming contact surfaces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122120A2 (en) * 1983-04-07 1984-10-17 British Steel Corporation Improvements in or relating to electric arc furnaces
EP0122120A3 (en) * 1983-04-07 1985-04-24 British Steel Corporation Improvements in or relating to electric arc furnaces
US4601042A (en) * 1983-04-07 1986-07-15 British Steel Corporation Electric arc furnaces
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
NO343580B1 (en) * 2005-10-10 2019-04-08 Fai Production Contact plate for electrometallurgical melting furnace electrode and method for producing it.

Also Published As

Publication number Publication date
FR2510338A1 (en) 1983-01-28
FR2510338B1 (en) 1984-04-06
JPS5826491A (en) 1983-02-16
ES8305177A1 (en) 1983-03-16
ES513338A0 (en) 1983-03-16

Similar Documents

Publication Publication Date Title
FR2589376A1 (en) MODULAR DEVICE FOR SUPPLYING A WIRE, IN PARTICULAR FOR WELDING TORCHES
EP1520650B1 (en) System for cooling a liquid-cooled welding device
EP0071517A1 (en) Arrangement for connecting and supporting a cooled composite electrode of an electric-arc furnace
EP0178981B1 (en) Electrode structure for a molten metal bath
EP0169100B1 (en) Wall electrode of a metallurgical vessel in contact with a melted metal
EP0223675B1 (en) Electric-welding torch with device for starting the arc
EP0106767A1 (en) Device for measuring the arc tension in a furnace
US5233625A (en) Metallurgical vessel with metallic electrode having readily replaceable wear part
US6377604B1 (en) Current-conducting arm for an electric arc furnace
FR2682003A1 (en) WALL ELECTRODE FOR DIRECT CURRENT ELECTRIC METALLURGICAL OVEN.
EP0099274B1 (en) Transformer, particularly a tension reducer for electric welding equipment
EP0080954A1 (en) Connection and support arrangement for the electrodes of an arc furnace
EP0132176A1 (en) Pincer apparatus in scissor form for assembling metallic elements by electric spot welding
US6386895B1 (en) Power cable adapter
US1920378A (en) Electric furnace electrode holder
BE354655A (en)
EP0750451A1 (en) Plasma torch with electromagnetic coil for independent and integral arc base displacement
FR2698300A1 (en) Arc welding apparatus in inert atmosphere with tungsten electrode.
CN214350187U (en) Welding porcelain nozzle structure
EP0750450B1 (en) Plasma torch having an essentially axisymmetrical general structure
CN113798746B (en) Device, method and application for welding high-low melting point metal
FR3106075A1 (en) &#34;Accessory intended for a conventional TIG torch to enable it to be transformed into a fused arc bicathode TIG torch in single source version&#34;
SU1257857A1 (en) Current lead of three-phase electric-arc furnace
FR3106076A1 (en) &#34;Electrode holder nozzle intended for a conventional single-source TIG torch&#34;
FR3105935A1 (en) Torch intended for a single-source bicathode TIG welding machine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19830303

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19840823

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DAVENE, JEAN