EP3164530A1 - Anode assembly - Google Patents

Anode assembly

Info

Publication number
EP3164530A1
EP3164530A1 EP15814208.3A EP15814208A EP3164530A1 EP 3164530 A1 EP3164530 A1 EP 3164530A1 EP 15814208 A EP15814208 A EP 15814208A EP 3164530 A1 EP3164530 A1 EP 3164530A1
Authority
EP
European Patent Office
Prior art keywords
anode
electrical connection
thermally insulating
support
anode assembly
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
EP15814208.3A
Other languages
German (de)
French (fr)
Other versions
EP3164530A4 (en
EP3164530B1 (en
Inventor
Sébastien BECASSE
Jean-François BILODEAU
Denis Laroche
Laurent Fiot
Steve Langlois
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.)
Rio Tinto Alcan International Ltd
Original Assignee
Rio Tinto Alcan International Ltd
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 Rio Tinto Alcan International Ltd filed Critical Rio Tinto Alcan International Ltd
Publication of EP3164530A1 publication Critical patent/EP3164530A1/en
Publication of EP3164530A4 publication Critical patent/EP3164530A4/en
Application granted granted Critical
Publication of EP3164530B1 publication Critical patent/EP3164530B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C25C3/12—Anodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C25C3/085—Cell construction, e.g. bottoms, walls, cathodes characterised by its non electrically conducting heat insulating parts
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/16—Electric current supply devices, e.g. bus bars

Definitions

  • the present invention relates to an anode assembly comprising an anode support and an anode for the production of aluminum.
  • Aluminum is conventionally produced in aluminum smelters, by electrolysis, according to the Hall-Héroult process.
  • an electrolysis cell comprising a box and an inner lining of refractory material.
  • the electrolytic cell also comprises cathode blocks arranged at the bottom of the box, traversed by conductive bars for collecting the electrolysis current and leading it to a subsequent electrolysis cell.
  • the electrolysis cell also comprises at least one anode block suspended on an anode support, such as a cross member, the anode block being partially immersed in an electrolytic bath, above the cathode blocks.
  • a liquid aluminum sheet, covering the cathode blocks, is formed as and when the reaction.
  • the flow of current is from the anode carrier to the cathode via the anode block and the electrolytic bath at a temperature of about 970 ° C wherein the alumina is dissolved.
  • This electrolysis current has an intensity of up to several hundreds of thousands of amperes.
  • the suspension of the anode block is then carried out by an intermediate element, capable of carrying this strong current, of resisting these very high temperatures but which is also capable of supporting the weight of the anode, such as a log made of steel.
  • the point reduction of the cross-section of the log made it possible to obtain a significant drop in temperature: from 650 ° C to 320 ° C for a reduction of the section over a log length of about 10 cm.
  • the log may be formed of two portions having different cross sections, and may be machined or formed of separate elements welded to reduce the loss of thermal energy by conduction.
  • this section reduction decreases the electrical conductance and therefore increases the power consumption.
  • this solution has a significant financial cost because it requires machining at least a portion from a log available in the general form of a standard cylinder. This machining step is also time consuming and contributes to a consequent loss of material.
  • the invention aims to provide a device for limiting heat losses without affecting its electrical conductance while limiting costs.
  • an anode assembly for the production of aluminum comprising an anode, an anode support, and an electrical connection element comprising a sealing portion and an out-sealing portion for electrically connecting the support of anode at the anode, wherein the anode comprises a recess in which is housed the sealing portion of the electrical connecting member and wherein a seal formed of an electrically conductive material retains the electrical connecting member, anode assembly comprising at least one thermally insulating element arranged between two facing walls belonging to the out-sealing portion of the electrical connection element and / or the anode support to reduce the heat transfer between the anode and the anode support when producing aluminum.
  • the sealing ensures an electrical conduction function while allowing mechanical attachment between the electrical connection element and the anode. Sealing typically extends along the side wall of the sealing portion of the electrical connecting member. This lateral contact between the seal and the electrical connection element allows a very good electrical conduction, but also a very good thermal conductivity between the anode and the electrical connection element.
  • the two walls facing each other are electrically and mechanically connected by means of a bead of electrically conductive material, plus particularly a weld seam.
  • the bead of electrically conductive material provides mechanical strength and electrical conduction in the area where the two walls are separated by the thermally insulating element.
  • the electrical connection element extends in an extension direction between the anode and the anode support and at least one thermally insulating element extends in a plane transverse to the direction of extension. .
  • the thermal transfer along a cross-section of the electrical connection element is significantly reduced because the heat losses by radiation between the surfaces between which the thermally insulating element is interposed are prevented.
  • At least one thermally insulating element is arranged between a wall of the electrical connection element and a wall of the anode support.
  • This configuration with a thermally insulating element interposed between the electrical connection element and the anode support is particularly advantageous in that the radiative heat flux and conduction between the electrical connection element and the anode support is limited. The presence of thermal insulation at this interface is thus very simple to implement and very effective in limiting energy losses.
  • the anode assembly comprises a bead of electrically conductive material, more particularly a weld bead, arranged to electrically and mechanically connect the electrical connection element and the anode support.
  • the electrical connection element provides mechanical support for the anode while promoting electrical conduction between the anode support and the anode.
  • the out-sealing portion of the electrical connection element delimits a housing in which is disposed at least one thermally insulating element.
  • the thermally insulating element prevents heat losses by radiation between opposite walls of the housing.
  • the housing is formed by a notch in the electrical connection element. This notch may in particular be machined in the electrical connection element.
  • the notch opens out laterally of the out-sealing portion of the electrical connection element so that the thermally insulating element is easily introduced into the electrical connection element.
  • This variant is thus very simple to put into practice.
  • the out-sealing portion of the electrical connection element comprises a first portion and a second portion, the first and second portions being separated by at least one thermally insulating element.
  • conductive heat transfer is limited on the cross-section of the out-seal portion of the electrical connection element between the first and second portions.
  • a complementary bead of electrically conductive material is arranged to cover at least a portion of said at least one thermally insulating element and to electrically and mechanically connect the first portion and the second portion.
  • the mechanical strength and the electrical conduction between the anode support and the anode thus remains very satisfactory, for a reduction of the important heat transfer.
  • the thermally insulating element is further protected by this enclosure in the housing.
  • the anode assembly further comprises a thermally insulating element disposed at the interface between the electrical connection element and the anode support.
  • a thermally insulating element disposed at the interface between the electrical connection element and the anode support.
  • the first portion disposed on the side of the anode support has a reduced cross section relative to that of the second portion disposed on the side of the anode and an electrical conduction member is arranged to electrically connect the second portion and the anode support.
  • an electrical conduction member is arranged to electrically connect the second portion and the anode support.
  • the electrical connection element comprises a substantially cylindrical shape, such as a steel log.
  • the steel makes it possible to withstand the corrosive environment in the electrolysis cell, at very high temperatures and is sufficiently resistant to support the anode.
  • At least one thermally insulating element comprises a plate form, formed in particular of a sintered powder, a film or a fiber felt comprising at least one refractory material.
  • the sintered powder has the advantage of being easily shaped and is adaptable to be disposed in any geometric configuration of the anode assembly.
  • Figure 1 illustrates an anode assembly according to a first embodiment of the invention.
  • FIG. 2 illustrates an anode assembly according to an alternative embodiment of the invention.
  • Figure 3 illustrates an anode assembly according to a second embodiment of the invention.
  • Figure 4 illustrates an anode assembly according to yet another embodiment of the invention.
  • the anode assembly 100 comprises an anode 3, typically of carbon, and an anode support 4 for the production of aluminum by electrolysis according to the Hall-Héroult method.
  • the anode 3 is suspended from the anode support 4 by an electrical connection element 1 comprising a sealing portion 21 ensuring the attachment to the anode 3 and the electrical conduction to the anode 3, and an out-seal portion 22 ensuring the mechanical suspension of the anode 3.
  • the anode 3 comprises in its upper part a recess 7 in which the sealing portion 21 of the electrical connecting element 1 is housed and fixed by a seal 8 of an electrically conductive material, cast iron for example.
  • the sealing portion 21 is therefore the lower part of the electrical connection element 1 which is caught in the seal 8, in contrast to the out-seal portion 22 which extends above the seal 8.
  • any other material suitable for sealing 8 may be used, especially sticky carbon paste.
  • This seal 8 covers all the surfaces of the recess 7 and the sealing portion 21 of the electrical connecting element 1 housed in the recess 7.
  • the seal 8 may otherwise extend along the side walls of the the sealing portion 21 and not on the underside.
  • the anode assembly also comprises a bead 9 of electrically conductive material, arranged to provide the electrical and mechanical connection between the anode support 4 and the electrical connection element 1, more particularly in the upper part of the out-seal portion 22 of the electrical connecting element 1.
  • the electrical connecting element 1 is typically made of steel and has a cylinder shape.
  • the bead 9 may be formed by a cupro-type copper-based weld disposed laterally at the interface between the electrical connection element 1 and the anode support 4.
  • FIG. 1 also illustrates in the out-seal portion 22 a thermally insulating element 6 which extends in a plane transverse to the direction of extension of the electrical connection element 1 between the anode 3 and the anode support 4.
  • the electrical connection element 1 comprises a housing 5, formed of a notch opening laterally and in which is disposed a thermally insulating element 6.
  • This thermally insulating element 6 may consist of any suitable refractory materials, such as sintered powder, a film or a fiber felt, comprising at least one refractory material.
  • the out-sealing portion 22 of the electrical connection element 1 comprises a first portion 11 and a second portion 12 distinct from the first portion 11 and between which a thermally insulating element 6 is arranged.
  • the heat transfer by conduction is thus significantly reduced by the fact that the entire cross section of the electrical connecting element 1 is covered by the thermally insulating element 6.
  • the electrical conduction is then provided by a complementary bead 13 of an electrically conductive material disposed laterally to the thermally insulating element 6 so as to electrically and mechanically connect the first portion 11 and the second portion 12.
  • the embodiment illustrated in FIG. 3 differs from the two previous embodiments, in particular in that the thermally insulating element 6 is disposed at the interface between the electrical connection element 1 and the anode support 4.
  • the embodiment illustrated in Figure 1 the bead 9 is disposed laterally to the insulating member 6 to provide an electrical and mechanical connection between the out-sealing portion 22 of the electrical connecting member 1 and the anode support 4. It has been observed that the electrical conduction between the anode and the anode support was mainly carried out by the weld bead 9 and not by the opposite surfaces brought into contact so that a thermally insulating element can advantageously be inserted between the electrical connection element and the anode support without prejudicing the overall electrical conduction. Radiation thermal losses can therefore be limited between the electrical connection element and the anode support.
  • the out-sealing portion 22 of the electrical connection element 1 comprises a first portion 1 1 disposed on the side of the anode support 4 and a second portion 12 disposed on the side of the anode 3.
  • the cross section of the first portion 1 1 is reduced compared to that of the second portion 12 to limit the heat transfer.
  • the anode assembly comprises a thermally insulating element 6 disposed between the electrical connection element 1 and the anode support 4 and further comprises a thermally insulating element 6 disposed between the first portion 1 1 and the second portion 12.
  • An electrical conduction member 14, such as a copper plate, is arranged to provide an electrical connection between the second portion 12 and the anode support 4 and rests against a portion of the first portion 11.
  • the heat transfer is very limited by the presence of the two thermally insulating elements 6 and the reduced cross section of the first portion 11.
  • the electrical connection is provided by the cord 9 and the complementary bead 13 as well as by the highly conductive copper plate.
  • the section of the copper plate being reduced, the thermal conduction thereby remains very limited.
  • the present invention provides an anode assembly 100 to effectively reduce the heat loss between the anode 3 and the anode carrier 4 by reducing heat transfer while also ensuring the maintenance of a very good electrical conduction.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Microwave Tubes (AREA)

Abstract

The invention relates to an anode assembly (100) including an anode (3) and an anode holder (4) for producing aluminium, characterised in that the anode assembly (100) comprises an electrical connection element (1) for electrically connecting the anode holder (4) to the anode (3), and at least one thermally insulating element (6) arranged such as to reduce the heat transfer between the anode (3) and the anode holder (4) during the production of aluminium.

Description

ENSEMBLE ANODIQUE  ANODIC SET
La présente invention concerne un ensemble anodique comprenant un support d'anode et une anode pour la production d'aluminium.  The present invention relates to an anode assembly comprising an anode support and an anode for the production of aluminum.
L'aluminium est classiquement produit dans des alumineries, par électrolyse, selon le procédé de Hall-Héroult. A cet effet, on prévoit une cuve d'électrolyse comprenant un caisson et un revêtement intérieur en matériau réfractaire. La cuve d'électrolyse comprend également des blocs cathodiques agencés au fond du caisson, parcourus par des barres conductrices destinées à collecter le courant d'électrolyse et le conduire à une cuve d'électrolyse suivante. La cuve d'électrolyse comprend également au moins un bloc anodique suspendu à un support d'anode, tel qu'une traverse, le bloc anodique étant plongé partiellement dans un bain électrolytique, au-dessus des blocs cathodiques. Une nappe d'aluminium liquide, recouvrant les blocs cathodiques, se forme au fur et à mesure de la réaction. Le passage du courant s'effectue du support d'anode vers la cathode via le bloc anodique et le bain électrolytique à une température d'environ 970°C dans lequel l'alumine est dissoute. Ce courant d'électrolyse présente une intensité pouvant atteindre plusieurs centaines de milliers d'ampères. La suspension du bloc anodique est alors réalisée par un élément intermédiaire, capable de véhiculer ce fort courant, de résister à ces très fortes températures mais qui est également capable de soutenir le poids de l'anode, tel qu'un rondin réalisé en acier.  Aluminum is conventionally produced in aluminum smelters, by electrolysis, according to the Hall-Héroult process. For this purpose, there is provided an electrolysis cell comprising a box and an inner lining of refractory material. The electrolytic cell also comprises cathode blocks arranged at the bottom of the box, traversed by conductive bars for collecting the electrolysis current and leading it to a subsequent electrolysis cell. The electrolysis cell also comprises at least one anode block suspended on an anode support, such as a cross member, the anode block being partially immersed in an electrolytic bath, above the cathode blocks. A liquid aluminum sheet, covering the cathode blocks, is formed as and when the reaction. The flow of current is from the anode carrier to the cathode via the anode block and the electrolytic bath at a temperature of about 970 ° C wherein the alumina is dissolved. This electrolysis current has an intensity of up to several hundreds of thousands of amperes. The suspension of the anode block is then carried out by an intermediate element, capable of carrying this strong current, of resisting these very high temperatures but which is also capable of supporting the weight of the anode, such as a log made of steel.
Or dans un tel dispositif, un flux thermique très important se forme entre l'anode en carbone et le support d'anode. Ce transfert thermique représente une perte énergétique importante et préjudiciable dans le processus d'électrolyse. In such a device, a very large heat flow is formed between the carbon anode and the anode support. This heat transfer represents a significant and detrimental energy loss in the electrolysis process.
Il a été observé que la réduction ponctuelle de la section transversale du rondin permettait d'obtenir une chute de température importante : de 650°C à 320°C pour une réduction de la section sur une longueur de rondin de 10 cm environ. En effet, dans la section solide du rondin, l'extraction de chaleur vers le support d'anode se fait essentiellement par conduction, et la réduction de la section transversale du rondin limite fortement ce transfert thermique par conduction. Dans cette configuration, le rondin peut être formé de deux portions présentant des sections transversales différentes, et pouvant être usinées ou formées d'éléments distincts soudés, pour diminuer la perte d'énergie thermique par conduction. Toutefois, cette réduction de section diminue la conductance électrique et augmente par conséquent la consommation électrique. De plus, cette solution présente un coût financier important car elle nécessite d'usiner au moins une portion à partir d'un rondin disponible sous la forme générale d'un cylindre standard. Cette étape d'usinage est également consommatrice de temps et contribue à une perte de matériau conséquente. It was observed that the point reduction of the cross-section of the log made it possible to obtain a significant drop in temperature: from 650 ° C to 320 ° C for a reduction of the section over a log length of about 10 cm. Indeed, in the solid section of the log, the extraction of heat towards the anode support is essentially by conduction, and the reduction of the cross section of the log greatly limits this thermal transfer by conduction. In this configuration, the log may be formed of two portions having different cross sections, and may be machined or formed of separate elements welded to reduce the loss of thermal energy by conduction. However, this section reduction decreases the electrical conductance and therefore increases the power consumption. In addition, this solution has a significant financial cost because it requires machining at least a portion from a log available in the general form of a standard cylinder. This machining step is also time consuming and contributes to a consequent loss of material.
Il est connu de la publication de brevet US6977031 de disposer un disque isolant thermiquement entre la paroi inférieure du rondin et le fond d'un manchon servant à la fixation du rondin dans un évidement de l'anode. Ce disque isolant thermiquement, disposé donc dans le fond de l'évidement permet un meilleur contrôle du trajet du flux de chaleur, lequel doit selon l'agencement de US6977031 , passer par les côtés de l'évidement, les parois verticales du manchon puis le rondin afin d'améliorer l'évacuation de chaleur depuis l'anode vers le support d'anode. Le résultat obtenu avec l'agencement de US6977031 est par conséquent inverse à celui recherché de diminution des pertes thermiques depuis l'anode vers le support anodique.  It is known from patent publication US6977031 to have a thermally insulating disc between the bottom wall of the log and the bottom of a sleeve for fixing the log in a recess of the anode. This thermally insulating disk, thus placed in the bottom of the recess, allows better control of the path of the heat flow, which must, according to the arrangement of US6977031, pass through the sides of the recess, the vertical walls of the sleeve and then the log to improve the heat dissipation from the anode to the anode support. The result obtained with the US6977031 arrangement is consequently the opposite of the one sought for reducing heat losses from the anode to the anode support.
Aussi, l'invention a pour objectif de proposer un dispositif permettant de limiter les pertes thermiques sans affecter sa conductance électrique tout en limitant les coûts. Pour ce faire, l'invention propose un ensemble anodique pour la production d'aluminium comprenant une anode, un support d'anode, et un élément de liaison électrique comportant une portion de scellement et une portion hors-scellement pour relier électriquement le support d'anode à l'anode, dans lequel l'anode comprend un évidement dans lequel est logé la portion de scellement de l'élément de liaison électrique et dans lequel un scellement formé en un matériau électriquement conducteur retient l'élément de liaison électrique, l'ensemble anodique comprenant au moins un élément thermiquement isolant agencé entre deux parois se faisant face appartenant à la portion hors-scellement de l'élément de liaison électrique et/ou au support d'anode pour réduire le transfert thermique entre l'anode et le support d'anode lors de la production d'aluminium.  Also, the invention aims to provide a device for limiting heat losses without affecting its electrical conductance while limiting costs. To do this, the invention proposes an anode assembly for the production of aluminum comprising an anode, an anode support, and an electrical connection element comprising a sealing portion and an out-sealing portion for electrically connecting the support of anode at the anode, wherein the anode comprises a recess in which is housed the sealing portion of the electrical connecting member and wherein a seal formed of an electrically conductive material retains the electrical connecting member, anode assembly comprising at least one thermally insulating element arranged between two facing walls belonging to the out-sealing portion of the electrical connection element and / or the anode support to reduce the heat transfer between the anode and the anode support when producing aluminum.
Ainsi, les pertes thermiques par rayonnement entre les surfaces entre lesquelles l'élément thermiquement isolant est intercalé sont empêchées, ce qui permet de réduire les pertes thermiques de cet ensemble anodique tout en conservant une liaison électrique satisfaisante entre le support d'anode et l'anode.  Thus, the heat losses by radiation between the surfaces between which the thermally insulating element is inserted are prevented, thereby reducing the thermal losses of the anode assembly while maintaining a satisfactory electrical connection between the anode support and the anode.
Le scellement permet d'assurer une fonction de conduction électrique tout en permettant une solidarisation mécanique entre l'élément de liaison électrique et l'anode. Le scellement s'étend typiquement le long de la paroi latérale de la portion de scellement de l'élément de liaison électrique. Ce contact latéral entre le scellement et l'élément de liaison électrique permet une très bonne conduction électrique, mais également une très bonne conductivité thermique entre l'anode et l'élément de liaison électrique.  The sealing ensures an electrical conduction function while allowing mechanical attachment between the electrical connection element and the anode. Sealing typically extends along the side wall of the sealing portion of the electrical connecting member. This lateral contact between the seal and the electrical connection element allows a very good electrical conduction, but also a very good thermal conductivity between the anode and the electrical connection element.
De préférence, les deux parois se faisant face sont reliées électriquement et mécaniquement au moyen d'un cordon de matériau électriquement conducteur, plus particulièrement un cordon de soudure. Ainsi, le cordon de matériau électriquement conducteur assure la tenue mécanique et la conduction électrique dans la zone où les deux parois sont séparées par l'élément thermiquement isolant. Preferably, the two walls facing each other are electrically and mechanically connected by means of a bead of electrically conductive material, plus particularly a weld seam. Thus, the bead of electrically conductive material provides mechanical strength and electrical conduction in the area where the two walls are separated by the thermally insulating element.
Selon une disposition avantageuse, l'élément de liaison électrique s'étend dans une direction d'extension entre l'anode et le support d'anode et au moins un élément thermiquement isolant s'étend dans un plan transversal à la direction d'extension. Dans cette configuration, le transfert thermique selon une section transversale de l'élément de liaison électrique est nettement diminué car les pertes thermiques par rayonnement entre les surfaces entre lesquelles l'élément thermiquement isolant est intercalé sont empêchées.  According to an advantageous arrangement, the electrical connection element extends in an extension direction between the anode and the anode support and at least one thermally insulating element extends in a plane transverse to the direction of extension. . In this configuration, the thermal transfer along a cross-section of the electrical connection element is significantly reduced because the heat losses by radiation between the surfaces between which the thermally insulating element is interposed are prevented.
Selon une possibilité préférée, au moins un élément thermiquement isolant est agencé entre une paroi de l'élément de liaison électrique et une paroi du support d'anode. Cette configuration avec un élément thermiquement isolant intercalé entre l'élément de liaison électrique et le support d'anode est particulièrement avantageuse en ce que le flux thermique par rayonnement et conduction entre l'élément de liaison électrique et le support d'anode est limité. La présence d'un isolant thermique à cette interface est ainsi très simple à mettre en œuvre et très efficace pour limiter les pertes énergétiques.  According to a preferred possibility, at least one thermally insulating element is arranged between a wall of the electrical connection element and a wall of the anode support. This configuration with a thermally insulating element interposed between the electrical connection element and the anode support is particularly advantageous in that the radiative heat flux and conduction between the electrical connection element and the anode support is limited. The presence of thermal insulation at this interface is thus very simple to implement and very effective in limiting energy losses.
De préférence, l'ensemble anodique comprend un cordon de matériau électriquement conducteur, plus particulièrement un cordon de soudure, agencé pour relier électriquement et mécaniquement l'élément de liaison électrique et le support d'anode. Ainsi, l'élément de liaison électrique assure le soutien mécanique de l'anode tout en favorisant la conduction électrique entre le support d'anode et l'anode.  Preferably, the anode assembly comprises a bead of electrically conductive material, more particularly a weld bead, arranged to electrically and mechanically connect the electrical connection element and the anode support. Thus, the electrical connection element provides mechanical support for the anode while promoting electrical conduction between the anode support and the anode.
Il a été observé par la demanderesse que le courant électrique circulant entre deux pièces soudées entre elles et dont les parois se font face et sont en contact passe en quasi- totalité par les soudures. Le positionnement d'un élément thermiquement isolant entre ces parois se faisant face permet donc un gain thermique et n'impact pas la conductivité électrique de l'ensemble anodique.  It has been observed by the Applicant that the electric current flowing between two parts welded together and whose walls are facing and are in contact passes almost completely by the welds. The positioning of a thermally insulating element between these facing walls therefore allows a thermal gain and does not impact the electrical conductivity of the anode assembly.
Selon une variante, la portion hors-scellement de l'élément de liaison électrique délimite un logement dans lequel est disposé au moins un élément thermiquement isolant. L'élément thermiquement isolant empêche les pertes thermiques par rayonnement entre des parois opposées du logement.  According to a variant, the out-sealing portion of the electrical connection element delimits a housing in which is disposed at least one thermally insulating element. The thermally insulating element prevents heat losses by radiation between opposite walls of the housing.
Typiquement, le logement est formé par une encoche dans l'élément de liaison électrique. Cette encoche peut être notamment usinée dans l'élément de liaison électrique.  Typically, the housing is formed by a notch in the electrical connection element. This notch may in particular be machined in the electrical connection element.
De préférence, l'encoche débouche latéralement de la portion hors-scellement de l'élément de liaison électrique de sorte que l'élément thermiquement isolant est facilement introduit dans l'élément de liaison électrique. Cette variante est ainsi très simple à mettre en pratique. Preferably, the notch opens out laterally of the out-sealing portion of the electrical connection element so that the thermally insulating element is easily introduced into the electrical connection element. This variant is thus very simple to put into practice.
Selon une possibilité, la portion hors-scellement de l'élément de liaison électrique comprend une première portion et une seconde portion, les première et seconde portions étant séparées par au moins un élément thermiquement isolant. Ainsi, le transfert thermique par conduction est limité sur la section transversale de la portion hors- scellement de l'élément de liaison électrique entre les première et seconde portions.  According to one possibility, the out-sealing portion of the electrical connection element comprises a first portion and a second portion, the first and second portions being separated by at least one thermally insulating element. Thus, conductive heat transfer is limited on the cross-section of the out-seal portion of the electrical connection element between the first and second portions.
De préférence, un cordon complémentaire de matériau électriquement conducteur, plus particulièrement un cordon de soudure, est agencé pour recouvrir au moins une partie dudit au moins un élément thermiquement isolant et pour relier électriquement et mécaniquement la première portion et la seconde portion. La tenue mécanique et la conduction électrique entre le support d'anode et l'anode reste ainsi très satisfaisante, pour une réduction du transfert thermique importante. L'élément thermiquement isolant est en outre protégé par cet enfermement dans le logement.  Preferably, a complementary bead of electrically conductive material, more particularly a bead, is arranged to cover at least a portion of said at least one thermally insulating element and to electrically and mechanically connect the first portion and the second portion. The mechanical strength and the electrical conduction between the anode support and the anode thus remains very satisfactory, for a reduction of the important heat transfer. The thermally insulating element is further protected by this enclosure in the housing.
Avantageusement, l'ensemble anodique comprend en outre un élément thermiquement isolant disposé à l'interface entre l'élément de liaison électrique et le support d'anode. Ainsi, la réduction du transfert thermique est encore améliorée.  Advantageously, the anode assembly further comprises a thermally insulating element disposed at the interface between the electrical connection element and the anode support. Thus, the reduction of heat transfer is further improved.
Dans une variante, la première portion disposée du côté du support d'anode présente une section transversale réduite par rapport à celle de la seconde portion disposée du côté de l'anode et un organe de conduction électrique est agencé pour relier électriquement la seconde portion et le support d'anode. Dans cette configuration, la réduction de la section de la première portion réduisant le transfert thermique reste sans incidence sur la conduction électrique de par la présence l'organe de conduction électrique.  In a variant, the first portion disposed on the side of the anode support has a reduced cross section relative to that of the second portion disposed on the side of the anode and an electrical conduction member is arranged to electrically connect the second portion and the anode support. In this configuration, the reduction of the section of the first portion reducing the heat transfer remains without impact on the electrical conduction by the presence of the electrical conduction member.
Typiquement, l'élément de liaison électrique comprend une forme sensiblement cylindrique, telle qu'un rondin en acier. L'acier permet en effet de résister à l'environnement corrosif dans la cuve d'électrolyse, aux températures très élevées et est suffisamment résistant pour soutenir l'anode.  Typically, the electrical connection element comprises a substantially cylindrical shape, such as a steel log. The steel makes it possible to withstand the corrosive environment in the electrolysis cell, at very high temperatures and is sufficiently resistant to support the anode.
Selon une possibilité, au moins un élément thermiquement isolant comprend une forme de plaque, formée notamment d'une poudre frittée, d'un film ou d'un feutre de fibres comprenant au moins un matériau réfractaire. La poudre frittée présente l'avantage d'être facilement conformée et est adaptable pour être disposée dans toute configuration géométrique de l'ensemble anodique.  According to one possibility, at least one thermally insulating element comprises a plate form, formed in particular of a sintered powder, a film or a fiber felt comprising at least one refractory material. The sintered powder has the advantage of being easily shaped and is adaptable to be disposed in any geometric configuration of the anode assembly.
D'autres aspects, buts et avantages de la présente invention apparaîtront mieux à la lecture de la description suivante de modes de réalisation de celle-ci, donnée à titre d'exemples non limitatifs et faite en référence aux dessins annexés. Les figures ne respectent pas nécessairement l'échelle de tous les éléments représentés de sorte à améliorer leur lisibilité. Dans la suite de la description, par souci de simplification, des éléments identiques, similaires ou équivalents des différentes formes de réalisation portent les mêmes références numériques. Other aspects, objects and advantages of the present invention will appear better on reading the following description of embodiments thereof, given by way of non-limiting examples and with reference to the accompanying drawings. The figures do do not necessarily respect the scale of all the elements represented in order to improve their readability. In the remainder of the description, for the sake of simplification, identical, similar or equivalent elements of the various embodiments bear the same numerical references.
La figure 1 illustre un ensemble anodique selon un premier mode de réalisation de l'invention. Figure 1 illustrates an anode assembly according to a first embodiment of the invention.
La figure 2 illustre un ensemble anodique selon une variante de réalisation de l'invention. Figure 2 illustrates an anode assembly according to an alternative embodiment of the invention.
La figure 3 illustre un ensemble anodique selon un second mode de réalisation de l'invention. Figure 3 illustrates an anode assembly according to a second embodiment of the invention.
La figure 4 illustre un ensemble anodique selon encore un autre mode de réalisation de l'invention. Figure 4 illustrates an anode assembly according to yet another embodiment of the invention.
Comme illustré à la figure 1 , l'ensemble anodique 100 comprend une anode 3, typiquement en carbone, et un support d'anode 4 pour la production d'aluminium par électrolyse selon le procédé de Hall-Héroult. L'anode 3 est suspendue au support d'anode 4 par un élément de liaison électrique 1 comportant une portion de scellement 21 assurant la fixation à l'anode 3 et la conduction électrique vers l'anode 3, et une portion hors-scellement 22 assurant la suspension mécanique de l'anode 3.  As illustrated in FIG. 1, the anode assembly 100 comprises an anode 3, typically of carbon, and an anode support 4 for the production of aluminum by electrolysis according to the Hall-Héroult method. The anode 3 is suspended from the anode support 4 by an electrical connection element 1 comprising a sealing portion 21 ensuring the attachment to the anode 3 and the electrical conduction to the anode 3, and an out-seal portion 22 ensuring the mechanical suspension of the anode 3.
L'anode 3 comprend dans sa partie supérieure un évidement 7 dans lequel la portion de scellement 21 de l'élément de liaison électrique 1 est logée et fixée par un scellement 8 en un matériau électriquement conducteur, en fonte par exemple. La portion de scellement 21 est donc la partie inférieure de l'élément de liaison électrique 1 qui se trouve prise dans le scellement 8, à contrario de la portion hors-scellement 22 qui s'étend au-dessus du scellement 8. Il est bien entendu dans le présent document que tout autre matériau adapté au scellement 8 peut être utilisé, notamment de la pâte carbonée collante. Ce scellement 8 recouvre l'ensemble des surfaces de l'évidement 7 et de la portion de scellement 21 de l'élément de liaison électrique 1 logé dans l'évidement 7. Le scellement 8 peut sinon s'étendre le long des parois latérales de la portion de scellement 21 et non sur le dessous.  The anode 3 comprises in its upper part a recess 7 in which the sealing portion 21 of the electrical connecting element 1 is housed and fixed by a seal 8 of an electrically conductive material, cast iron for example. The sealing portion 21 is therefore the lower part of the electrical connection element 1 which is caught in the seal 8, in contrast to the out-seal portion 22 which extends above the seal 8. It is well understood in the present document that any other material suitable for sealing 8 may be used, especially sticky carbon paste. This seal 8 covers all the surfaces of the recess 7 and the sealing portion 21 of the electrical connecting element 1 housed in the recess 7. The seal 8 may otherwise extend along the side walls of the the sealing portion 21 and not on the underside.
L'ensemble anodique comporte également un cordon 9 de matériau électriquement conducteur, agencé pour assurer la liaison électrique et mécanique entre le support d'anode 4 et l'élément de liaison électrique 1 , plus particulièrement en partie supérieure de la portion hors-scellement 22 de l'élément de liaison électrique 1. L'élément de liaison électrique 1 est typiquement réalisé en acier et présente une forme de cylindre. Le cordon 9 peut être formé par une soudure à base de cuivre de type cupro, disposée latéralement à l'interface entre l'élément de liaison électrique 1 et le support d'anode 4. La figure 1 illustre également dans la portion hors-scellement 22 un élément thermiquement isolant 6 qui s'étend selon un plan transversal à la direction d'extension de l'élément de liaison électrique 1 entre l'anode 3 et le support d'anode 4. Cette configuration réduit ainsi efficacement le transfert thermique de l'anode 3 vers le support d'anode 4. Plus précisément, l'élément de liaison électrique 1 comprend un logement 5, formé d'une encoche débouchant latéralement et dans lequel est disposé un élément thermiquement isolant 6. Cet élément thermiquement isolant 6 peut être constitué de tous matériaux réfractaires adaptés, tels que de la poudre frittée, un film ou un feutre de fibres, comprenant au moins un matériau réfractaire. The anode assembly also comprises a bead 9 of electrically conductive material, arranged to provide the electrical and mechanical connection between the anode support 4 and the electrical connection element 1, more particularly in the upper part of the out-seal portion 22 of the electrical connecting element 1. The electrical connecting element 1 is typically made of steel and has a cylinder shape. The bead 9 may be formed by a cupro-type copper-based weld disposed laterally at the interface between the electrical connection element 1 and the anode support 4. FIG. 1 also illustrates in the out-seal portion 22 a thermally insulating element 6 which extends in a plane transverse to the direction of extension of the electrical connection element 1 between the anode 3 and the anode support 4. This configuration thus effectively reduces the heat transfer from the anode 3 to the anode support 4. More specifically, the electrical connection element 1 comprises a housing 5, formed of a notch opening laterally and in which is disposed a thermally insulating element 6. This thermally insulating element 6 may consist of any suitable refractory materials, such as sintered powder, a film or a fiber felt, comprising at least one refractory material.
Dans le mode de réalisation illustré à la figure 2, la portion hors-scellement 22 de l'élément de liaison électrique 1 comprend une première portion 1 1 et une seconde portion 12 distincte de la première portion 1 1 et entre lesquelles un élément thermiquement isolant 6 est disposé. Le transfert thermique par conduction est ainsi nettement diminué de par le fait que la totalité de la section transversale de l'élément de liaison électrique 1 est recouverte par l'élément thermiquement isolant 6. La conduction électrique est alors assurée par un cordon complémentaire 13 d'un matériau électriquement conducteur, disposé latéralement à l'élément thermiquement isolant 6 de sorte à relier électriquement et mécaniquement la première portion 11 et la seconde portion 12. In the embodiment illustrated in FIG. 2, the out-sealing portion 22 of the electrical connection element 1 comprises a first portion 11 and a second portion 12 distinct from the first portion 11 and between which a thermally insulating element 6 is arranged. The heat transfer by conduction is thus significantly reduced by the fact that the entire cross section of the electrical connecting element 1 is covered by the thermally insulating element 6. The electrical conduction is then provided by a complementary bead 13 of an electrically conductive material disposed laterally to the thermally insulating element 6 so as to electrically and mechanically connect the first portion 11 and the second portion 12.
Le mode de réalisation illustré à la figure 3 diffère des deux modes de réalisation précédents notamment en ce que l'élément isolant thermiquement 6 est disposé à l'interface entre l'élément de liaison électrique 1 et le support d'anode 4. Comme pour le mode de réalisation illustré à la figure 1 , le cordon 9 est disposé latéralement à l'élément isolant 6 pour assurer une liaison électrique et mécanique entre la portion hors-scellement 22 de l'élément de liaison électrique 1 et le support d'anode 4. Il a été observé que la conduction électrique entre l'anode et le support d'anode était principalement réalisée par le cordon 9 de soudure et non par les surfaces opposées mises en contact de sorte qu'un élément thermiquement isolant peut avantageusement être inséré entre l'élément de liaison électrique et le support d'anode sans porter préjudice à la conduction électrique globale. Les pertes thermiques par rayonnement peuvent donc être limitées entre l'élément de liaison électrique et le support d'anode. The embodiment illustrated in FIG. 3 differs from the two previous embodiments, in particular in that the thermally insulating element 6 is disposed at the interface between the electrical connection element 1 and the anode support 4. the embodiment illustrated in Figure 1, the bead 9 is disposed laterally to the insulating member 6 to provide an electrical and mechanical connection between the out-sealing portion 22 of the electrical connecting member 1 and the anode support 4. It has been observed that the electrical conduction between the anode and the anode support was mainly carried out by the weld bead 9 and not by the opposite surfaces brought into contact so that a thermally insulating element can advantageously be inserted between the electrical connection element and the anode support without prejudicing the overall electrical conduction. Radiation thermal losses can therefore be limited between the electrical connection element and the anode support.
Selon le mode de réalisation illustré à la figure 4, la portion hors-scellement 22 de l'élément de liaison électrique 1 comprend une première portion 1 1 disposée du coté du support d'anode 4 et une seconde portion 12 disposée du coté de l'anode 3. La section transversale de la première portion 1 1 est réduite par comparaison à celle de la seconde portion 12 pour limiter le transfert thermique. Par ailleurs, l'ensemble anodique comprend un élément thermiquement isolant 6 disposé entre l'élément de liaison électrique 1 et le support d'anode 4 et comprend en outre un élément thermiquement isolant 6 disposé entre la première portion 1 1 et la seconde portion 12. Un organe de conduction électrique 14, tel qu'une plaque de cuivre, est agencé de sorte à assurer une liaison électrique entre la seconde portion 12 et le support d'anode 4 et repose contre une partie de la première portion 11. Dans cette configuration, le transfert thermique est très limité par la présence des deux éléments thermiquement isolants 6 et de la section transversale réduite de la première portion 11. Par ailleurs, la liaison électrique est assurée par le cordon 9 et le cordon complémentaire 13 ainsi que par la plaque de cuivre très conductrice. La section de la plaque de cuivre étant réduite, la conduction thermique par ce biais reste très limitée. According to the embodiment illustrated in FIG. 4, the out-sealing portion 22 of the electrical connection element 1 comprises a first portion 1 1 disposed on the side of the anode support 4 and a second portion 12 disposed on the side of the anode 3. The cross section of the first portion 1 1 is reduced compared to that of the second portion 12 to limit the heat transfer. Moreover, the anode assembly comprises a thermally insulating element 6 disposed between the electrical connection element 1 and the anode support 4 and further comprises a thermally insulating element 6 disposed between the first portion 1 1 and the second portion 12. An electrical conduction member 14, such as a copper plate, is arranged to provide an electrical connection between the second portion 12 and the anode support 4 and rests against a portion of the first portion 11. In this configuration, the heat transfer is very limited by the presence of the two thermally insulating elements 6 and the reduced cross section of the first portion 11. Moreover, the electrical connection is provided by the cord 9 and the complementary bead 13 as well as by the highly conductive copper plate. The section of the copper plate being reduced, the thermal conduction thereby remains very limited.
Ainsi, la présente invention propose un ensemble anodique 100 permettant de réduire efficacement la perte thermique entre l'anode 3 et le support anodique 4 par diminution du transfert thermique tout en assurant par ailleurs le maintien d'une très bonne conduction électrique.  Thus, the present invention provides an anode assembly 100 to effectively reduce the heat loss between the anode 3 and the anode carrier 4 by reducing heat transfer while also ensuring the maintenance of a very good electrical conduction.
Il va de soi que l'invention n'est pas limitée aux modes de réalisation décrits ci-dessus à titre d'exemples mais qu'elle comprend tous les équivalents techniques et les variantes des moyens décrits ainsi que leurs combinaisons.  It goes without saying that the invention is not limited to the embodiments described above as examples but that it includes all the technical equivalents and variants of the means described as well as their combinations.

Claims

REVENDICATIONS
1. Ensemble anodique (100) pour la production d'aluminium comprenant une anode (3), un support d'anode (4), et un élément de liaison électrique (1 ) comportant une portion de scellement (21 ) et une portion hors-scellement (22) pour relier électriquement le support d'anode (4) à l'anode (3), dans lequel l'anode (3) comprend un évidement (7) dans lequel est logé la portion de scellement de l'élément de liaison électrique (1 ) et dans lequel un scellement (8) formé en un matériau électriquement conducteur retient l'élément de liaison électrique (1 ), caractérisé en ce que au moins un élément thermiquement isolant (6) est agencé entre deux parois se faisant face appartenant à la portion hors-scellement (22) de l'élément de liaison électrique (1 ) et/ou au support d'anode (4) pour réduire le transfert thermique entre l'anode (3) et le support d'anode (4) lors de la production d'aluminium. Anode assembly (100) for producing aluminum comprising an anode (3), an anode support (4), and an electrical connecting member (1) having a sealing portion (21) and a portion -coating (22) for electrically connecting the anode support (4) to the anode (3), wherein the anode (3) comprises a recess (7) in which is housed the sealing portion of the element electrical connection (1) and in which a seal (8) formed of an electrically conductive material retains the electrical connection element (1), characterized in that at least one thermally insulating element (6) is arranged between two walls facing the off-seal portion (22) of the electrical connecting member (1) and / or the anode support (4) to reduce heat transfer between the anode (3) and the support of anode (4) during the production of aluminum.
2. Ensemble anodique (100) selon la revendication 1 , dans lequel les deux parois se faisant face sont reliées électriquement et mécaniquement au moyen d'un cordon (9) de matériau électriquement conducteur. 2. Anode assembly (100) according to claim 1, wherein the two facing walls are electrically and mechanically connected by means of a bead (9) of electrically conductive material.
3. Ensemble anodique (100) selon l'une des revendications 1 et 2, dans lequel l'élément de liaison électrique (1) s'étend dans une direction d'extension entre l'anode (3) et le support d'anode (4) et dans lequel au moins un élément thermiquement isolant (6) s'étend dans un plan transversal à la direction d!extension. 3. Anode assembly (100) according to one of claims 1 and 2, wherein the electrical connecting element (1) extends in an extension direction between the anode (3) and the anode support. (4) and wherein at least one thermally insulating element (6) extends in a plane transverse to the direction of extension.
4. Ensemble anodique (100) selon l'une des revendications 1 à 3, dans lequel au moins un élément thermiquement isolant (6) est agencé entre une paroi de l'élément de liaison électrique (1) et une paroi du support d'anode (4). 4. Anode assembly (100) according to one of claims 1 to 3, wherein at least one thermally insulating element (6) is arranged between a wall of the electrical connection element (1) and a wall of the support of anode (4).
5. Ensemble anodique (100) selon l'une des revendications 1 à 4, dans lequel l'ensemble anodique (100) comprend un cordon (9) de matériau électriquement conducteur agencé pour relier électriquement et mécaniquement l'élément de liaison électrique (1) et le support d'anode (4). 5. Anode assembly (100) according to one of claims 1 to 4, wherein the anode assembly (100) comprises a bead (9) of electrically conductive material arranged to electrically and mechanically connect the electrical connection element (1). ) and the anode support (4).
6. Ensemble anodique (100) selon l'Une des revendications 1 à 5, dans lequel la portion hors-scellement (22) de l'élément de liaison électrique (1 ) délimite un logement (5) dans lequel est disposé au moins un élément thermiquement isolant (6). 6. Anode assembly (100) according to one of claims 1 to 5, wherein the out-seal portion (22) of the electrical connection element (1) defines a housing (5) in which is disposed at least one thermally insulating element (6).
7. Ensemble anodique (100) selon la revendication 6, dans lequel le logement (5) est formé par une encoche dans la portion hors-scellement (22) de l'élément de liaison électrique (1). 7. Anode assembly (100) according to claim 6, wherein the housing (5) is formed by a notch in the out-seal portion (22) of the electrical connecting member (1).
8. Ensemble anodique (100) selon la revendication 7, dans lequel l'encoche débouche latéralement de la portion hors-scellement (22) de l'élément de liaison électrique (1 ). 8. Anode assembly (100) according to claim 7, wherein the notch opens laterally of the out-seal portion (22) of the electrical connection element (1).
9. Ensemble anodique (100) selon l'une des revendications 1 à 8, dans lequel la portion hors-scellement (22) de l'élément de liaison électrique (1) comprend une première portion (11) et une seconde portion (12), les première et seconde portions (11 ,12) étant séparées par au moins un élément thermiquement isolant (6). 9. Anode assembly (100) according to one of claims 1 to 8, wherein the out-seal portion (22) of the electrical connection element (1) comprises a first portion (11) and a second portion (12). ), the first and second portions (11, 12) being separated by at least one thermally insulating element (6).
10. Ensemble anodique (100) selon la revendication 9, dans lequel un cordon complémentaire (13) de matériau électriquement conducteur est agencé pour recouvrir au moins une partie dudit au moins un élément thermiquement isolant (6) et pour relier électriquement et mécaniquement la première portion (1 1) et la seconde portion (12). 10. Anode assembly (100) according to claim 9, wherein a complementary bead (13) of electrically conductive material is arranged to cover at least a portion of said at least one thermally insulating element (6) and to electrically and mechanically connect the first portion (1 1) and the second portion (12).
11. Ensemble anodique (100) selon l'une des revendications 9 à 10, dans lequel la première portion (11 ) disposée du côté du support d'anode (4) présente une section transversale réduite par rapport à celle de la seconde portion (12) disposée du côté de l'anode (3) et dans lequel un organe de conduction électrique (14) est agencé pour relier électriquement la seconde portion (12) et le support d'anode (4). 11. Anode assembly (100) according to one of claims 9 to 10, wherein the first portion (11) disposed on the side of the anode support (4) has a reduced cross section relative to that of the second portion ( 12) disposed on the side of the anode (3) and wherein an electrical conduction member (14) is arranged to electrically connect the second portion (12) and the anode support (4).
12. Ensemble anodique (100) selon l'une des revendications 1 à 10, dans lequel l'élément de liaison électrique comprend une forme sensiblement cylindrique, telle qu'un rondin en acier. 12. Anode assembly (100) according to one of claims 1 to 10, wherein the electrical connecting member comprises a substantially cylindrical shape, such as a steel log.
13. Ensemble anodique (100) selon l'une des revendications 1 à 12, dans lequel au moins un élément thermiquement isolant (6) comprend une forme de plaque, formée notamment d'une poudre frittée, d'un film ou d'un feutre de fibres comprenant au moins un matériau réfractaire. 13. Anode assembly (100) according to one of claims 1 to 12, wherein at least one thermally insulating element (6) comprises a plate form, formed in particular of a sintered powder, a film or a fiber felt comprising at least one refractory material.
EP15814208.3A 2014-07-04 2015-07-01 Anode assembly Active EP3164530B1 (en)

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GB962599A (en) * 1961-08-03 1964-07-01 Montedison Spa Electrolytic furnace for aluminium production
US3509030A (en) * 1967-12-15 1970-04-28 Alcan Res & Dev Casing liner
DE3009098C2 (en) 1979-12-21 1983-02-24 Schweizerische Aluminium AG, 3965 Chippis Method of conducting electricity between electrolytic furnaces
FR2527229A1 (en) * 1982-05-18 1983-11-25 Aluminium Grece METHOD FOR CALORIFUTING PRECISE ANODES IN ELECTROLYSIS CUPES FOR ALUMINUM PRODUCTION
FR2565258B1 (en) * 1984-05-29 1986-08-29 Pechiney Aluminium PARTIALLY SHRINKED CARBON ANODE FOR TANKS FOR THE PRODUCTION OF ALUMINUM BY ELECTROLYSIS
AUPQ218899A0 (en) * 1999-08-13 1999-09-02 Jakovac, Vjekoslav Anode assembly comprising separation of electrical and mechanical functions of the assembly
FR2900938B1 (en) * 2006-05-15 2008-06-20 Ecl Soc Par Actions Simplifiee METHOD FOR MANUFACTURING ANODES FOR THE PRODUCTION OF ALUMINUM BY IGNEE ELECTROLYSIS, THE SAID ANODES AND THEIR USE
EP2006419A1 (en) * 2007-06-22 2008-12-24 Sgl Carbon Ag Reduced voltage drop anode assembly for aluminium electrolysis cell
CN101709485B (en) * 2009-12-18 2012-07-04 中国铝业股份有限公司 Aluminum electrolytic cell for producing virgin aluminum by inert anode
WO2012100340A1 (en) * 2011-01-28 2012-08-02 UNIVERSITé LAVAL Anode and connector for a hall-heroult industrial cell

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CN106471160B (en) 2018-10-16
EP3164530B1 (en) 2019-04-24

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