EP0508537B1 - Electrical conductor, process for manufacturing an electrical conductor and electrode for electrolysis cell - Google Patents

Electrical conductor, process for manufacturing an electrical conductor and electrode for electrolysis cell Download PDF

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Publication number
EP0508537B1
EP0508537B1 EP92200972A EP92200972A EP0508537B1 EP 0508537 B1 EP0508537 B1 EP 0508537B1 EP 92200972 A EP92200972 A EP 92200972A EP 92200972 A EP92200972 A EP 92200972A EP 0508537 B1 EP0508537 B1 EP 0508537B1
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EP
European Patent Office
Prior art keywords
sheath
bar
metal
bead
electrical conductor
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EP92200972A
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German (de)
French (fr)
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EP0508537A1 (en
Inventor
Emile Cabaraux
Edgard Nicolas
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Solvay SA
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Solvay SA
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/02—Electrodes; Connections thereof

Definitions

  • the present invention relates to an electrical conductor comprising a metal bar lined with a sheath made of a metal different from that of the bar.
  • Electrodes of this type are commonly used in the construction of electrodes intended for the electrolysis cells of aqueous solutions, in particular sodium chloride solutions.
  • they usually include a copper rod jacketed with a sheath made of a metal inert with respect to the chemical environment in the electrolysis cell and they are engaged horizontally or vertically between a pair of vertical metal plates forming the actual electrode.
  • the metal of the sheath is generally chosen from iron, nickel and their alloys.
  • the copper bar is used for its high electrical conductivity and therefore has the main function of conveying high current densities, while the sheath is used to isolate the copper bar from the corrosive action of the electrolytes circulating in the cell. electrolysis.
  • the sheath also has the additional function of ensuring the circulation of electric current between the bar and the plates of the electrode. It is therefore desirable to minimize the electrical contact resistance between the bar and the sheath. To achieve this objective, consideration has been given to using electrical conductors obtained by a metallurgical operation of co-threading the bar and the sheath. The electrical conductors obtained by this technique are however expensive.
  • the invention aims to remedy the aforementioned drawbacks, by providing an electrical conductor formed of a rod jacketed with a sheath, which has good electrical conductivity in the contact zone between the rod and the sheath and whose manufacture is easy and economic.
  • the invention relates to an electrical conductor comprising a metal bar lined with a sheath made of a metal different from that of the bar; according to the invention, the bar has at least one longitudinal groove containing a cord made of the same metal as the sheath, welded to the bar, and the sheath has an opening facing the cord, said opening containing a metallic mass welded to the cord and to the sheath .
  • the main function of the metal bar is to conduct the electric current.
  • the sheath fulfills two functions: on the one hand, it serves to isolate the bar from the chemical environment in which the electrical conductor is used; on the other hand, it serves to transfer the electric current in the transverse direction to the bar between the latter and a metallic element (for example an electrode) connected to the sheath.
  • the profile of the bar is not critical. It may for example consist of a cylinder of circular or oval cross section, or of an elongated parallelepiped, the cross section of which is a square, a rectangle, a trapezoid or another regular or irregular polygon. For reasons of ease of construction, it is preferable to use a straight bar of square or rectangular cross section.
  • the bar has a longitudinal groove. This can extend over the entire length of the bar or only a fraction thereof. The groove serves as a receptacle for a metal cord made of the same metal or alloy as the sheath, this metal cord being welded to the bar.
  • the sheath must have a profile that fits the profile of the bar, so that it can wrap it over approximately its entire length.
  • the profile of the sheath and its arrangement around the bar must also be such that the sheath has an opening opposite the metal cord located in the groove of the bar.
  • the opening of the sheath can be a slit which extends over its entire length or over only a part of it. It serves as a receptacle for a metallic mass made of the same metal or alloy as the sheath, this metallic mass being welded to the cord and to the sheath.
  • the metal of the sheath depends on the destination of the electrical conductor. It must be chosen from among those likely to be welded to the metal of the bar.
  • the metal bar is made of copper and the sheath is made of a metal chosen from iron, nickel, iron alloys and nickel alloys.
  • Iron alloys include ordinary carbon steels and alloy steels such as, for example, stainless steels alloyed with chromium, nickel and molybdenum and silicon steels which have particular electrical properties.
  • nickel alloys are monel (alloy of nickel, copper, iron, manganese, silicon) and inconel (alloy of nickel, manganese, iron, silicon, chromium, aluminum and titanium).
  • the electrical conductors according to this embodiment of the invention find a particular application in the construction of cathodes intended for the cells of electrolysis of aqueous solutions of alkali metal chloride.
  • the sheath is a metal sheet folded around the bar so as to wrap the latter, and the aforementioned opening is a slot delimited between the two edges juxtaposed with the sheet.
  • the bar has two longitudinal grooves each containing a cord made of the same metal as the sheath, and the sheath is formed by two separate longitudinal shells in the form of a gutter, which longitudinally cover the bar by providing between their longitudinal edges which face each other, a gap constituting the abovementioned opening opposite each bead.
  • the sheath therefore has two longitudinal openings in the form of slots, which are located opposite the cords and which contain two metallic masses as defined above, welded respectively to the two cords and to the two cockles.
  • the bar is coupled to the sheath by a welded assembly, consisting of the or each aforementioned cord and the or each said metal mass.
  • This welded assembly ensures optimum electrical connection between the bar and the sheath and consequently reduces the resistance to the passage of electric current between the bar and the sheath.
  • the invention also relates to a method of manufacturing an electrical conductor, by assembling a metal bar and a sheath made of a metal different from that of the bar; according to the invention, at least one longitudinal groove is formed in the bar, a bead of the same metal as the sheath is welded in the groove of the bar, the bar is engaged in the sheath, leaving an opening in the latter facing the cord and the sheath is welded to the cord in the above-mentioned opening.
  • the bar can for example be obtained by a steel rolling operation.
  • the groove can be formed in the bar during rolling, or it can be formed later by a machining operation.
  • the sheath can be obtained by a rolling operation of the type used for the manufacture of metal tubes, the aforementioned opening in the sheath being then obtained by machining.
  • a sheath obtained by bending or bending a metal sheet is used, and a gap forming between the longitudinal edges of the bent sheet is maintained. 'the aforementioned opening, intended to contain the metallic mass.
  • two longitudinal grooves are formed in the bar and a sheath obtained is implemented by joining two longitudinal metal shells so as to maintain a spacing between their edges arranged facing each other. screw, said spacing forming the above opening.
  • the two shells have the shape of a gutter and are for example obtained by stamping a metal sheet.
  • the electrical conductor according to the invention is specially designed for the transport of electric current longitudinally in the bar and transversely through the sheath. It is suitable for both direct and alternating current. It finds an interesting application in the construction of electrodes intended for electrolysis processes, such as iron, steel or nickel cathodes commonly used in the processes of electrolysis of water or aqueous solutions of chlorides of alkali metals.
  • the invention therefore also relates to an electrode for an electrolysis cell, comprising at least one plate made of a metal selected from iron, nickel, iron alloys and nickel alloys, said plate being fixed to a conforming electrical conductor.
  • the bar is made of copper and the sheath is made of the same metal as the plate.
  • This electrode finds application as a cathode for the production of hydrogen and aqueous solutions of sodium hydroxide in an electrolysis cell of aqueous solutions of sodium chloride.
  • the plate can be full or perforated. It may for example be a sheet of expanded metal.
  • Figure 1 shows, in cross section, a particular embodiment of the electrical conductor according to the invention.
  • FIG. 2 shows a particular embodiment of the electrode according to the invention, in section along the horizontal plane II-II of FIG. 3.
  • FIG. 3 is a vertical cross section along the plane III-III of FIG. 2.
  • the electrical conductor shown in FIG. 1 comprises a copper bar 1, in a nickel sheath 2.
  • the copper bar is a straight bar, of rectangular section which has been obtained by rolling. It has, on two opposite faces, two grooves 3, 3 '.
  • the grooves 3 and 3 ' are filled with nickel cords 4 and 4'.
  • the nickel beads were formed in the grooves by melt deposition, using a conventional arc welding technique using a nickel or nickel alloy welding rod, so that they are welded to bar 1.
  • the sheath 2 consists of two shells 5 and 6, having the shape of gutters coming exactly to marry the periphery of the bar 1.
  • the shells 5 and 6 were obtained by stamping two sheets of nickel. Their dimensions are chosen so that a slot is delimited between their longitudinal edges 7 and 8 facing the bead 4 and that a second slot is defined between their other longitudinal edges 7 'and 8' facing the bead 4 '. These two slots are filled respectively with two nickel masses 9 and 9 '. These are obtained by deposit at the molten state, by means of a conventional arc welding technique using a nickel or nickel alloy welding rod, so that they are welded to the beads 4, 4 ′ and to the shells 5 and 6.
  • the cords 4 and 4 'and the metal masses 9 and 9' provide both a mechanical attachment of the sleeve 2 to the bar 1 and an electrical connection of low resistance between the bar 1 and the sleeve 2.
  • the electrode shown in FIGS. 2 and 3 comprises a pair of perforated vertical plates 10, 10 ′ in nickel, arranged in parallel and facing one another, on either side of a horizontal metallic conductor designated in as a whole by the reference notation 11.
  • Two corrugated sheets 12, 12 'in nickel are used to connect the plates 10 and 10' to the conductor 11.
  • the conductor 11 conforms to that shown in Figure 1 and described above.
  • the fixing of the sheets 12 and 12 'to the conductor 11 is also obtained by a welding operation. This is carried out along the metallic masses 9 and 9 'of the electrical conductor, so as to minimize the electrical resistance of the junction between the plates 10, 10' and the bar 1 of the electrical conductor 11.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Secondary Cells (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Non-Insulated Conductors (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

Electrical conductor comprising a metallic bar (1) jacketed with a sheath (2) made from a metal different from that of the bar, in which the bar (1) exhibits at least one longitudinal groove (3, 3') containing a bead (4, 4') made from the same metal as the sheath (2), welded to the bar (1), and the sheath (2) exhibits an opening opposite the bead (4, 4'), the said opening containing a metallic mass (9, 9') welded to the bead (4, 4') and to the sheath (2). The conductor finds one application in electrodes comprising a metallic plate longitudinally fixed to an electrical conductor.

Description

La présente invention concerne un conducteur électrique comprenant un barreau métallique chemisé d'un fourreau en un métal différent de celui du barreau.The present invention relates to an electrical conductor comprising a metal bar lined with a sheath made of a metal different from that of the bar.

Des conducteurs électriques de ce type sont communément utilisés dans la construction d'électrodes destinées aux cellules d'électrolyse de solutions aqueuses, notamment des solutions de chlorure de sodium. Dans cette application, ils comprennent habituellement un barreau en cuivre chemisé d'un fourreau en un métal inerte vis-à-vis de l'environnement chimique dans la cellule d'électrolyse et ils sont engagés horizontalement ou verticalement entre une paire de plaques métalliques verticales formant l'électrode proprement dite. Par exemple, dans le cas de cathodes destinées à la production électrolytique d'hydrogène et de solutions aqueuses d'hydroxyde de sodium, le métal du fourreau est généralement choisi parmi le fer, le nickel et leurs alliages. Le barreau en cuivre est utilisé pour sa haute conductibilité électrique et a dès lors pour fonction principale de véhiculer des densités de courant élevées, tandis que le fourreau sert à isoler le barreau en cuivre de l'action corrosive des électrolytes circulant dans la cellule d'électrolyse. Le fourreau exerce en outre la fonction supplémentaire d'assurer une circulation du courant électrique entre le barreau et les plaques de l'électrode. Il est dès lors souhaitable de réduire au minimum la résistance électrique de contact entre le barreau et le fourreau. Pour atteindre cet objectif, on a songé à utiliser des conducteurs électriques obtenus par une opération métallurgique de cofilage du barreau et du fourreau. Les conducteurs électriques obtenus par cette technique sont toutefois coûteux.Electrical conductors of this type are commonly used in the construction of electrodes intended for the electrolysis cells of aqueous solutions, in particular sodium chloride solutions. In this application, they usually include a copper rod jacketed with a sheath made of a metal inert with respect to the chemical environment in the electrolysis cell and they are engaged horizontally or vertically between a pair of vertical metal plates forming the actual electrode. For example, in the case of cathodes intended for the electrolytic production of hydrogen and aqueous solutions of sodium hydroxide, the metal of the sheath is generally chosen from iron, nickel and their alloys. The copper bar is used for its high electrical conductivity and therefore has the main function of conveying high current densities, while the sheath is used to isolate the copper bar from the corrosive action of the electrolytes circulating in the cell. electrolysis. The sheath also has the additional function of ensuring the circulation of electric current between the bar and the plates of the electrode. It is therefore desirable to minimize the electrical contact resistance between the bar and the sheath. To achieve this objective, consideration has been given to using electrical conductors obtained by a metallurgical operation of co-threading the bar and the sheath. The electrical conductors obtained by this technique are however expensive.

Dans le brevet US-A-4647358, on propose un procédé plus économique pour fabriquer un conducteur électrique destiné au raffinage électrolytique du cuivre. Selon ce procédé, on fabrique séparément le barreau en cuivre et le fourreau, ce dernier étant fendu sur toute sa longueur, on engage le barreau dans le fourreau et on soude les bords de la fente du fourreau l'un à l'autre. Les conducteurs électriques obtenus par ce procédé connus présentent toutefois un piètre conductibilité électrique à la surface de contact entre le barreau et le fourreau.In US-A-4647358, a more economical method is proposed for manufacturing an electrical conductor intended for the electrolytic refining of copper. According to this process, we manufacture separately the copper bar and the sheath, the latter being split over its entire length, the bar is engaged in the sheath and the edges of the slot in the sheath are welded together. The electrical conductors obtained by this known method, however, exhibit poor electrical conductivity at the contact surface between the bar and the sheath.

L'invention vise à remédier aux inconvénients précités, en fournissant un conducteur électrique formé d'un barreau chemisé d'un fourreau, qui présente une bonne conductibilité électrique dans la zone de contact entre le barreau et le fourreau et dont la fabrication est aisée et économique.The invention aims to remedy the aforementioned drawbacks, by providing an electrical conductor formed of a rod jacketed with a sheath, which has good electrical conductivity in the contact zone between the rod and the sheath and whose manufacture is easy and economic.

En conséquence, l'invention concerne un conducteur électrique comprenant un barreau métallique chemisé d'un fourreau en un métal différent de celui du barreau; selon l'invention, le barreau présente au moins une rainure longitudinale contenant un cordon en même métal que le fourreau, soudé au barreau, et le fourreau présente une ouverture en regard du cordon, ladite ouverture contenant une masse métallique soudée au cordon et au fourreau.Consequently, the invention relates to an electrical conductor comprising a metal bar lined with a sheath made of a metal different from that of the bar; according to the invention, the bar has at least one longitudinal groove containing a cord made of the same metal as the sheath, welded to the bar, and the sheath has an opening facing the cord, said opening containing a metallic mass welded to the cord and to the sheath .

Dans le conducteur électrique selon l'invention, le barreau métallique a pour fonction principale de conduire le courant électrique. Le fourreau remplit deux fonctions : d'une part, il sert à isoler le barreau de l'environnement chimique dans lequel le conducteur électrique est utilisé; d'autre part, il sert à transférer le courant électrique dans le sens transversal au barreau entre celui-ci et un élément métallique (par exemple une électrode) relié au fourreau.In the electrical conductor according to the invention, the main function of the metal bar is to conduct the electric current. The sheath fulfills two functions: on the one hand, it serves to isolate the bar from the chemical environment in which the electrical conductor is used; on the other hand, it serves to transfer the electric current in the transverse direction to the bar between the latter and a metallic element (for example an electrode) connected to the sheath.

Le profil du barreau n'est pas critique. Il peut par exemple consister en un cylindre de section circulaire ou ovale, ou en un parallélépipède allongé, dont la section transversale est un carré, un rectangle, un trapèze ou un autre polygone régulier ou non. Pour une raison de facilité de construction, on utilise de préférence un barreau rectiligne de section transversale carrée ou rectangulaire. Selon l'invention, le barreau présente une rainure longitudinale. Celle-ci peut s'étendre sur la totalité de la longueur du barreau ou sur un fraction de celle-ci seulement. La rainure sert de réceptacle à un cordon métallique constitué du même métal ou alliage que le fourreau, ce cordon métallique étant soudé au barreau.The profile of the bar is not critical. It may for example consist of a cylinder of circular or oval cross section, or of an elongated parallelepiped, the cross section of which is a square, a rectangle, a trapezoid or another regular or irregular polygon. For reasons of ease of construction, it is preferable to use a straight bar of square or rectangular cross section. According to the invention, the bar has a longitudinal groove. This can extend over the entire length of the bar or only a fraction thereof. The groove serves as a receptacle for a metal cord made of the same metal or alloy as the sheath, this metal cord being welded to the bar.

Le fourreau doit avoir un profil qui s'adapte au profil du barreau, de manière qu'il puisse l'envelopper sur approximativement la totalité de sa longueur. Le profil du fourreau et sa disposition autour du barreau doivent par ailleurs être tels que le fourreau présente une ouverture en regard du cordon métallique se trouvant dans la rainure du barreau. L'ouverture du fourreau peut être une fente qui s'étend sur la totalité de sa longueur ou sur un partie seulement de celle-ci. Elle sert de réceptacle à une masse métallique constituée du même métal ou alliage que le fourreau, cette masse métallique étant soudée au cordon et au fourreau.The sheath must have a profile that fits the profile of the bar, so that it can wrap it over approximately its entire length. The profile of the sheath and its arrangement around the bar must also be such that the sheath has an opening opposite the metal cord located in the groove of the bar. The opening of the sheath can be a slit which extends over its entire length or over only a part of it. It serves as a receptacle for a metallic mass made of the same metal or alloy as the sheath, this metallic mass being welded to the cord and to the sheath.

Le métal du fourreau dépend de la destination du conducteur électrique. Il doit être choisi parmi ceux susceptibles d'être soudés au métal du barreau.The metal of the sheath depends on the destination of the electrical conductor. It must be chosen from among those likely to be welded to the metal of the bar.

Dans une forme de réalisation particulière du conducteur électrique selon l'invention, le barreau métallique est en cuivre et le fourreau est en un métal choisi parmi le fer, le nickel, les alliages du fer et les alliages du nickel. Les alliages du fer comprennent les aciers ordinaires au carbone et les aciers alliés tels que, par exemple, les aciers inoxydables alliés au chrome, au nickel et au molybdène et les aciers au silicium qui présentent des propriétés électriques particulières. Des exemples d'alliages de nickel sont le monel (alliage de nickel, de cuivre, de fer, de manganèse, de silicium) et l'inconel (alliage de nickel, de manganèse, de fer, de silicium, de chrome, d'aluminium et de titane). Les conducteurs électriques conformes à cette forme de réalisation de l'invention trouve une application particulière dans la construction de cathodes destinées aux cellules d'électrolyse de solutions aqueuses de chlorure de métal alcalin.In a particular embodiment of the electrical conductor according to the invention, the metal bar is made of copper and the sheath is made of a metal chosen from iron, nickel, iron alloys and nickel alloys. Iron alloys include ordinary carbon steels and alloy steels such as, for example, stainless steels alloyed with chromium, nickel and molybdenum and silicon steels which have particular electrical properties. Examples of nickel alloys are monel (alloy of nickel, copper, iron, manganese, silicon) and inconel (alloy of nickel, manganese, iron, silicon, chromium, aluminum and titanium). The electrical conductors according to this embodiment of the invention find a particular application in the construction of cathodes intended for the cells of electrolysis of aqueous solutions of alkali metal chloride.

Dans une autre forme de réalisation du conducteur électrique selon l'invention, le fourreau est une tôle métallique repliée autour du barreau de manière à envelopper celui-ci, et l'ouverture précitée est une fente délimitée entre les deux bords juxtaposés de la tôle.In another embodiment of the electrical conductor according to the invention, the sheath is a metal sheet folded around the bar so as to wrap the latter, and the aforementioned opening is a slot delimited between the two edges juxtaposed with the sheet.

Dans une forme de réalisation supplémentaire du conducteur électrique selon l'invention, le barreau présente deux rainures longitudinales contenant chacune un cordon en même métal que le fourreau, et le fourreau est formé de deux coques longitudinales distinctes en forme de gouttière, qui coiffent longitudinalement le barreau en ménageant entre leurs bords longitudinaux qui se font face, un écart constituant l'ouverture précitée en regard de chaque cordon. Dans cette forme de réalisation de l'invention, le fourreau présente dès lors deux ouvertures longitudinales en forme de fentes, qui sont situées en face des cordons et qui contiennent deux masses métalliques telles que définies plus haut, soudées respectivement aux deux cordons et aux deux coques.In a further embodiment of the electrical conductor according to the invention, the bar has two longitudinal grooves each containing a cord made of the same metal as the sheath, and the sheath is formed by two separate longitudinal shells in the form of a gutter, which longitudinally cover the bar by providing between their longitudinal edges which face each other, a gap constituting the abovementioned opening opposite each bead. In this embodiment of the invention, the sheath therefore has two longitudinal openings in the form of slots, which are located opposite the cords and which contain two metallic masses as defined above, welded respectively to the two cords and to the two cockles.

Dans le conducteur électrique selon l'invention, le barreau est couplé au fourreau par un assemblage soudé, constitué du ou de chaque cordon précité et de la ou de chaque masse métallique précitée. Cet assemblage soudé assure un connexion électrique optimum entre le barreau et le fourreau et réduit en conséquence la résistance au passage du courant électrique entre le barreau et le fourreau.In the electrical conductor according to the invention, the bar is coupled to the sheath by a welded assembly, consisting of the or each aforementioned cord and the or each said metal mass. This welded assembly ensures optimum electrical connection between the bar and the sheath and consequently reduces the resistance to the passage of electric current between the bar and the sheath.

L'invention concerne aussi un procédé de fabrication d'un conducteur électrique, par assemblage d'un barreau métallique et d'un fourreau en un métal différent de celui du barreau; selon l'invention, on ménage au moins une rainure longitudinale dans le barreau, on soude un cordon en même métal que le fourreau dans la rainure du barreau, on engage le barreau dans le fourreau en ménageant dans celui-ci une ouverture en regard du cordon et on soude le fourreau au cordon dans l'ouverture susdite.The invention also relates to a method of manufacturing an electrical conductor, by assembling a metal bar and a sheath made of a metal different from that of the bar; according to the invention, at least one longitudinal groove is formed in the bar, a bead of the same metal as the sheath is welded in the groove of the bar, the bar is engaged in the sheath, leaving an opening in the latter facing the cord and the sheath is welded to the cord in the above-mentioned opening.

Dans le procédé selon l'invention, le barreau peut par exemple être obtenu par une opération sidérurgique de laminage. La rainure peut être formée dans le barreau pendant le laminage, ou bien elle peut être formée ultérieurement par une opération d'usinage.In the method according to the invention, the bar can for example be obtained by a steel rolling operation. The groove can be formed in the bar during rolling, or it can be formed later by a machining operation.

Le fourreau peut être obtenu par une opération de laminage du type de celles utilisées pour la fabrication des tubes métalliques, l'ouverture précitée dans le fourreau étant alors obtenue par usinage. On préfère toutefois, selon l'invention, mettre en oeuvre un fourreau obtenu par pliage ou cintrage d'une tôle métallique. A cet effet, dans une forme de réalisation particulière du procédé selon l'invention, on met en oeuvre un fourreau obtenu par cintrage ou pliage d'une tôle métallique, et on maintient entre les bords longitudinaux de la tôle cintrée, un écart formant l'ouverture précitée, destinée à contenir la masse métallique.The sheath can be obtained by a rolling operation of the type used for the manufacture of metal tubes, the aforementioned opening in the sheath being then obtained by machining. However, it is preferred, according to the invention, to use a sheath obtained by bending or bending a metal sheet. To this end, in a particular embodiment of the method according to the invention, a sheath obtained by bending or bending a metal sheet is used, and a gap forming between the longitudinal edges of the bent sheet is maintained. 'the aforementioned opening, intended to contain the metallic mass.

Dans une autre forme de réalisation du procédé selon l'invention, on ménage deux rainures longitudinales dans le barreau et on met en oeuvre un fourreau obtenu en accolant deux coques métalliques longitudinales de manière à maintenir un écartement entre leurs bords disposés en vis-à-vis, ledit écartement formant l'ouverture susdite. Dans cette forme de réalisation du procédé selon l'invention, les deux coques ont la forme d'une gouttière et sont par exemple obtenues par emboutissage d'une tôle métallique.In another embodiment of the method according to the invention, two longitudinal grooves are formed in the bar and a sheath obtained is implemented by joining two longitudinal metal shells so as to maintain a spacing between their edges arranged facing each other. screw, said spacing forming the above opening. In this embodiment of the method according to the invention, the two shells have the shape of a gutter and are for example obtained by stamping a metal sheet.

Le conducteur électrique selon l'invention est spécialement conçu pour le transport du courant électrique longitudinalement dans le barreau et transversalement à travers le fourreau. Il convient aussi bien pour le courant continu que pour le courant alternatif. Il trouve une application intéressante dans la construction d'électrodes destinées à des procédés d'électrolyse, telles que des cathodes en fer, en acier ou en nickel communément utilisées dans les procédés d'électrolyse de l'eau ou des solutions aqueuses de chlorures de métaux alcalins.The electrical conductor according to the invention is specially designed for the transport of electric current longitudinally in the bar and transversely through the sheath. It is suitable for both direct and alternating current. It finds an interesting application in the construction of electrodes intended for electrolysis processes, such as iron, steel or nickel cathodes commonly used in the processes of electrolysis of water or aqueous solutions of chlorides of alkali metals.

L'invention concerne dès lors aussi une électrode pour cellule d'électrolyse, comprenant au moins une plaque en un métal sélectionné parmi le fer, le nickel, les alliages du fer et les alliages du nickel, ladite plaque étant fixée à un conducteur électrique conforme à l'invention, dans lequel le barreau est en cuivre et le fourreau est en un même métal que la plaque. Cette électrode trouve une application comme cathode pour la production d'hydrogène et de solutions aqueuses d'hydroxyde de sodium dans une cellule d'électrolyse de solutions aqueuses de chlorure de sodium.The invention therefore also relates to an electrode for an electrolysis cell, comprising at least one plate made of a metal selected from iron, nickel, iron alloys and nickel alloys, said plate being fixed to a conforming electrical conductor. to the invention, in which the bar is made of copper and the sheath is made of the same metal as the plate. This electrode finds application as a cathode for the production of hydrogen and aqueous solutions of sodium hydroxide in an electrolysis cell of aqueous solutions of sodium chloride.

Dans l'électrode selon l'invention, la plaque peut être pleine ou ajourée. Elle peut être par exemple une tôle en métal déployé.In the electrode according to the invention, the plate can be full or perforated. It may for example be a sheet of expanded metal.

Des particularités et détails de l'invention vont ressortir de la description suivante des dessins annexés, qui représentent quelques formes de réalisation du conducteur électrique et de l'électrode selon l'invention.Special features and details of the invention will emerge from the following description of the appended drawings, which show some embodiments of the electrical conductor and of the electrode according to the invention.

La figure 1 montre, en section transversale, une forme de réalisation particulière du conducteur électrique selon l'invention.Figure 1 shows, in cross section, a particular embodiment of the electrical conductor according to the invention.

La figure 2 montre une forme de réalisation particulière de l'électrode selon l'invention, en coupe selon le plan horizontal II-II de la figure 3.FIG. 2 shows a particular embodiment of the electrode according to the invention, in section along the horizontal plane II-II of FIG. 3.

La figure 3 est une section transversale verticale selon le plan III-III de la figure 2.FIG. 3 is a vertical cross section along the plane III-III of FIG. 2.

Dans ces figures, des mêmes notations de référence désignent des éléments identiques.In these figures, the same reference notations designate identical elements.

Le conducteur électrique représenté à la figure 1 comprend un barreau en cuivre 1, dans un fourreau en nickel 2. Le barreau en cuivre est un barreau rectiligne, de section rectangulaire qui a été obtenu par laminage. Il présente, sur deux faces opposées, deux rainures 3, 3'. Les rainures 3 et 3' sont remplies de cordons en nickel 4 et 4'. Les cordons en nickel ont été formés dans les rainures par dépôt à l'état fondu, au moyen d'une technique conventionnelle de soudure à l'arc en utilisant une baguette de soudure en nickel ou en alliage de nickel, de sorte qu'ils soient soudés au barreau 1.The electrical conductor shown in FIG. 1 comprises a copper bar 1, in a nickel sheath 2. The copper bar is a straight bar, of rectangular section which has been obtained by rolling. It has, on two opposite faces, two grooves 3, 3 '. The grooves 3 and 3 'are filled with nickel cords 4 and 4'. The nickel beads were formed in the grooves by melt deposition, using a conventional arc welding technique using a nickel or nickel alloy welding rod, so that they are welded to bar 1.

Le fourreau 2 est constitué de deux coques 5 et 6, ayant la forme de gouttières venant épouser exactement le pourtour du barreau 1. Les coques 5 et 6 ont été obtenues par emboutissage de deux tôles en nickel. Leurs dimensions sont choisies de manière qu'une fente soit délimitée entre leurs bords longitudinaux 7 et 8 en regard du cordon 4 et qu'une seconde fente soit délimitée entre leurs autres bords longitudinaux 7' et 8' en regard du cordon 4'. Ces deux fentes sont remplies respectivement de deux masses en nickel 9 et 9'. Celles-ci sont obtenues par dépôt à l'état fondu, au moyen d'une technique conventionnelle de soudure à l'arc en utilisant une baguette de soudure en nickel ou en alliage de nickel, de sorte qu'elles soient soudées aux cordons 4, 4' et aux coques 5 et 6.The sheath 2 consists of two shells 5 and 6, having the shape of gutters coming exactly to marry the periphery of the bar 1. The shells 5 and 6 were obtained by stamping two sheets of nickel. Their dimensions are chosen so that a slot is delimited between their longitudinal edges 7 and 8 facing the bead 4 and that a second slot is defined between their other longitudinal edges 7 'and 8' facing the bead 4 '. These two slots are filled respectively with two nickel masses 9 and 9 '. These are obtained by deposit at the molten state, by means of a conventional arc welding technique using a nickel or nickel alloy welding rod, so that they are welded to the beads 4, 4 ′ and to the shells 5 and 6.

Dans le conducteur représenté à la figure 1, les cordons 4 et 4' et les masses métalliques 9 et 9' réalisent à la fois une fixation mécanique du fourreau 2 au barreau 1 et une jonction électrique de faible résistance entre le barreau 1 et le fourreau 2.In the conductor shown in Figure 1, the cords 4 and 4 'and the metal masses 9 and 9' provide both a mechanical attachment of the sleeve 2 to the bar 1 and an electrical connection of low resistance between the bar 1 and the sleeve 2.

L'électrode représentée aux figures 2 et 3 comprend une paire de plaques verticales ajourée 10, 10' en nickel, disposées parallèlement et en regard l'une de l'autre, de part et d'autre d'un conducteur métallique horizontal désigné dans son ensemble par la notation de référence 11. Deux feuilles ondulées 12, 12' en nickel servent à relier les plaques 10 et 10' au conducteur 11.The electrode shown in FIGS. 2 and 3 comprises a pair of perforated vertical plates 10, 10 ′ in nickel, arranged in parallel and facing one another, on either side of a horizontal metallic conductor designated in as a whole by the reference notation 11. Two corrugated sheets 12, 12 'in nickel are used to connect the plates 10 and 10' to the conductor 11.

Le conducteur 11 est conforme à celui représenté à la figure 1 et décrit plus haut.The conductor 11 conforms to that shown in Figure 1 and described above.

La fixation des plaques 10 et 10' aux feuilles 12 et 12' est assurée par des points de soudure.The fixing of the plates 10 and 10 'to the sheets 12 and 12' is ensured by welding points.

La fixation des feuilles 12 et 12' au conducteur 11 est également obtenue par une opération de soudage. Celle-ci est réalisée le long des masses métalliques 9 et 9' du conducteur électrique, de manière à minimiser la résistance électrique de la jonction entre les plaques 10, 10' et le barreau 1 du conducteur électrique 11.The fixing of the sheets 12 and 12 'to the conductor 11 is also obtained by a welding operation. This is carried out along the metallic masses 9 and 9 'of the electrical conductor, so as to minimize the electrical resistance of the junction between the plates 10, 10' and the bar 1 of the electrical conductor 11.

Claims (10)

  1. Electrical conductor comprising a metallic bar (1) jacketed with a sheath (2) made from a metal different from that of the bar, characterised in that the bar (1) exhibits at least one longitudinal groove (3, 3') containing a bead (4, 4') made from the same metal as the sheath, welded to the bar, and in that the sheath (2) exhibits an opening opposite the bead (4, 4'), the said opening containing a metallic mass (9, 9') welded to the bead (4, 4') and to the sheath (2).
  2. Conductor according to Claim 1, characterised in that the bar (1) exhibits two longitudinal grooves (3, 3') each containing a bead (4, 4') made from the same metal as the sheath, and in that the sheath (2) is formed from two separate longitudinal shells (5, 6) which longitudinally cover the bar while providing, between their longitudinal edges (7 and 8; 7' and 8') which face each other, a gap constituting the abovementioned opening opposite each bead (4, 4').
  3. Conductor according to Claim 1 or 2, characterised in that the or each longitudinal groove (3, 3') extends over the entire length of the bar (1).
  4. Conductor according to any one of Claims 1 to 3, characterised in that the bar (1) is made from copper and the sheath (2) is made from a metal selected from iron, copper, nickel, alloys of iron and alloys of nickel.
  5. Process for manufacturing an electrical conductor, by assembling a metallic bar (1) and a sheath (2) made from a metal different from that of the bar, characterised in that at least one longitudinal groove (3, 3') is made in the bar (1), a bead (4, 4') made from the same metal as the sheath is welded in the groove of the bar, the bar (1) is inserted into the sheath (2) by making an opening in the latter opposite the bead (4, 4') and the sheath (2) is welded to the bead (4, 4') in the abovementioned opening.
  6. Process according to Claim 5, characterised in that two longitudinal grooves (3, 3') are made in the bar (1) and a sheath (2) obtained by placing two longitudinal metallic shells (5, 6) together is utilized in such a manner as to leave a gap between their opposingly disposed edges (7 and 8; 7' and 8'), the said gap forming the abovementioned opening.
  7. Process according to Claim 5 or 6, characterised in that the welding of the sheath (2) to the bead (4, 4') is brought about by a build-up (9, 9') of metal in the abovementioned opening.
  8. Process according to Claim 7, characterised in that a copper bar (1) and a sheath (2) made from a metal selected from iron, nickel, alloys of iron and alloys of nickel are utilised and in that the welding of the sheath to the bead is brought about by a build-up (9, 9') of metal identical to the metal of the sheath.
  9. Electrode for an electrolysis cell, comprising at least one plate (10, 10') made from a metal selected from iron, nickel or alloys of these metals and fixed to an electrical conductor (11), characterised in that the electrical conductor (11) is in accordance with Claim 4.
  10. Electrode according to Claim 9, characterised in that it is a cathode for the electrolysis of aqueous alkali metal chloride solutions.
EP92200972A 1991-04-10 1992-04-04 Electrical conductor, process for manufacturing an electrical conductor and electrode for electrolysis cell Expired - Lifetime EP0508537B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9100361 1991-04-10
BE9100361A BE1004728A3 (en) 1991-04-18 1991-04-18 Electrical conductor, method for an electrical conductor and electrode for electrolysis cell.

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EP0508537A1 EP0508537A1 (en) 1992-10-14
EP0508537B1 true EP0508537B1 (en) 1995-07-05

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EP92200972A Expired - Lifetime EP0508537B1 (en) 1991-04-10 1992-04-04 Electrical conductor, process for manufacturing an electrical conductor and electrode for electrolysis cell

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EP (1) EP0508537B1 (en)
JP (1) JPH05120918A (en)
AT (1) ATE124730T1 (en)
BE (1) BE1004728A3 (en)
BR (1) BR9201407A (en)
CA (1) CA2066319A1 (en)
CS (1) CS117092A3 (en)
DE (1) DE69203267T2 (en)
DK (1) DK0508537T3 (en)
ES (1) ES2074807T3 (en)
PL (1) PL168915B1 (en)

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CL2004000941A1 (en) * 2004-05-03 2005-03-11 Ind Proveedora De Partes Metal CORROSION RESISTANT UNION AREA BETWEEN COPPER AND STAINLESS STEEL OR TITANIUM, FORMED BY A FIRST COPPER-NICKEL ALLOCATION AREA, AN INTERMEDIATE AREA WITH NICKEL OR PURE NICKEL ALLOY AND A SECOND AREA OF STAINLESS STEEL-NI ALLOY
FR2879849A1 (en) * 2004-12-22 2006-06-23 Amc Etec Sarl HIGH CURRENT CURRENT TRANSMISSION DEVICE
FR2879850B1 (en) * 2004-12-22 2008-05-30 A M C Sarl HIGH INTENSITY CURRENT TRANSPORT DEVICE
US10680354B1 (en) * 2019-03-14 2020-06-09 Antaya Technologies Corporation Electrically conductive connector

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US2985747A (en) * 1959-11-27 1961-05-23 Titanium Metals Corp Welding titanium
US3511646A (en) * 1965-06-24 1970-05-12 Hoganas Billesholms Ab Filler metal for the electric arc welding,and method for its manufacture
US4014763A (en) * 1974-11-08 1977-03-29 Imperial Metal Industries (Kynoch) Limited Cathode and hanger bar assembly and electrolysis therewith
GB1460089A (en) * 1974-11-08 1976-12-31 Imp Metal Ind Kynoch Ltd Cathode assembly for electrolysis
GB1460090A (en) * 1974-11-14 1976-12-31 Bordina N M Semiconductor photoelectric generator
US4196335A (en) * 1976-03-26 1980-04-01 Sumitomo Metal Industries, Ltd. Submerged arc welding process
GB2041002B (en) * 1979-01-23 1982-12-01 Imi Kynoch Ltd Electrode suspension bars
DE3209138A1 (en) * 1982-03-12 1983-09-15 Conradty GmbH & Co Metallelektroden KG, 8505 Röthenbach COATED VALVE METAL ANODE FOR THE ELECTROLYTIC EXTRACTION OF METALS OR METAL OXIDES
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DE3434278A1 (en) * 1984-09-19 1986-04-17 Norddeutsche Affinerie AG, 2000 Hamburg ELECTRICAL SUSPENSION DEVICE FOR CATHODES

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CS117092A3 (en) 1992-11-18
DK0508537T3 (en) 1995-11-27
PL294252A1 (en) 1992-10-19
BR9201407A (en) 1992-12-01
JPH05120918A (en) 1993-05-18
BE1004728A3 (en) 1993-01-19
PL168915B1 (en) 1996-05-31
DE69203267T2 (en) 1995-12-21
CA2066319A1 (en) 1992-10-19
DE69203267D1 (en) 1995-08-10
EP0508537A1 (en) 1992-10-14
ATE124730T1 (en) 1995-07-15
US5286925A (en) 1994-02-15
ES2074807T3 (en) 1995-09-16

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