EP2440688B1 - Plancher formant cathode, procédé de production d'un plancher formant cathode, et utilisation dudit plancher dans une cellule d'électrolyse pour la production d'aluminium - Google Patents

Plancher formant cathode, procédé de production d'un plancher formant cathode, et utilisation dudit plancher dans une cellule d'électrolyse pour la production d'aluminium Download PDF

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Publication number
EP2440688B1
EP2440688B1 EP10721169.0A EP10721169A EP2440688B1 EP 2440688 B1 EP2440688 B1 EP 2440688B1 EP 10721169 A EP10721169 A EP 10721169A EP 2440688 B1 EP2440688 B1 EP 2440688B1
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Prior art keywords
cathode
cathode block
block
blocks
electrolytic cell
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EP10721169.0A
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German (de)
English (en)
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EP2440688A1 (fr
EP2440688B8 (fr
Inventor
Oswin ÖTTINGER
Frank Hiltmann
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Tokai Cobex GmbH
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Sgl Cfl Ce GmbH
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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor

Definitions

  • the present invention relates to a cathode bottom, a process for its production and its use in an electrolytic cell for the production of aluminum.
  • An electrolytic cell generally comprises a tray of sheet iron or steel whose bottom is lined with thermal insulation.
  • cathode blocks made of carbon or graphite which are connected to the negative pole of a power source, form the bottom of another trough, the wall of which consists of side stones made of carbon, graphite or silicon carbide.
  • a gap is formed between two cathode blocks in each case a gap is formed.
  • the arrangement of the cathode block and possibly filled gap is generally referred to as the cathode bottom.
  • the joints between the cathode blocks are filled conventionally by ramming of carbon and / or graphite with tar.
  • the cathode blocks and the ramming mass serve as the cathode bottom.
  • As an anode serve short coal blocks, which depend on a connected to the positive pole of the power source support frame.
  • an electrolytic cell is a molten mixture of alumina (Al 2 O 3 ) and cryolite (Na 3 AlF 6 ), preferably about 15-20% alumina and about 85-80% cryolite, a molten electrolysis at a temperature of about 960 ° C. subjected.
  • the dissolved one reacts Alumina with the solid carbon block anode and forms liquid aluminum and gaseous carbon dioxide.
  • the melt mixture coats the sidewalls of the electrolytic cell with a protective crust, while aluminum accumulates under the melt due to its greater density compared to the density of the melt at the bottom of the electrolytic cell to be protected from reoxidation by atmospheric oxygen. The aluminum thus produced is removed from the electrolysis cell and further processed.
  • the anode During electrolysis, the anode is consumed while the cathode bottom behaves chemically inert during electrolysis.
  • the anode therefore represents a wearing part which is replaced during operation while the cathode bottom is designed for long-term and durable use. Nevertheless, current cathode bottoms are subject to wear.
  • aluminum layer By moving over the cathode bottom aluminum layer is a mechanical abrasion of the cathode surface.
  • aluminum carbide formation and sodium incorporation result in (electro) chemical corrosion of the cathode bottom. Particle adhesion to the cathode surface also leads to its structural weakening.
  • a disadvantage of the above-described electrolytic cell having ramming mass of carbon and / or graphite with tar is that for technical reasons such as mechanical stability or the stamping procedure thin layers of coarse-grained ramming mass not to are realized, so that joints are present, which on the one hand reduce the cathode surface and in the other hand, aluminum and particles can store, increasing the wear of the cathode bottom.
  • the most commonly used anthracite ramming masses are electrically and thermally less conductive than in particular graphitized cathode blocks.
  • effective cathode area is lost and the higher total resistance results in higher energy consumption, which lowers the economy of the process.
  • the cathode floor wear increases due to the higher specific load.
  • the present invention is therefore based on the object to provide a means that increases the cathode area and is suitable for forming a cathode bottom with a large cathode area. Furthermore, the present invention is based on the object to provide a simple method for producing a cathode bottom with a high cathode area.
  • the cathode bottom comprises a material which is arranged on at least one cathode block and which is characterized in that the material comprises a pre-compressed plate based on expanded graphite, wherein the at least one cathode block in a predetermined distance to at least one further cathode block and / or a side wall of the electrolytic cell is arranged such that at least one joint is formed between them, wherein the material fills the joint.
  • the precompressed sheet based on expanded graphite will also be referred to as the precompressed graphite sheet.
  • the means for increasing the cathode area therefore represents the material comprising a precompressed graphite plate.
  • the material can be frictionally connected to the cathode block.
  • the pre-compressed graphite plate used in the invention can be used in the areas of an electrolytic cell, where ramming mass is used conventionally, ie in particular joints formed between cathode blocks, but also in intermediate spaces, which are located between side walls of the electrolysis cell and cathode blocks.
  • the precompressed graphite plate is used in particular as a sealing means between cathode blocks of a cathode bottom.
  • a cathode bottom which has a pre-compressed graphite plate, has a high effective cathode area by means of a juxtaposition of a plurality of cathode blocks whose producible size dimensions are set by the economically and technically possible manufacturability limits by means of non-positive connection.
  • the precompressed graphite plate has the conventional tarry carbon mass a higher electrical and thermal conductivity and thus increases the cathode surface.
  • Expanded graphite has the following advantageous properties: It is harmless to health, environmentally friendly, soft, compressible, lightweight, resistant to aging, chemically and thermally resistant, technically gas and liquid-tight, non-combustible and easy to work. In addition, it does not form an alloy with liquid aluminum. It is therefore suitable as a material for a cathode bottom for an electrolytic cell for the production of aluminum.
  • Expanded graphite is available by chemical and thermal treatment of graphite such as natural graphite.
  • the graphite can undergo a volume size by a factor of 200 to 400, while maintaining the thermal and electrical conductivity.
  • graphite is treated with an intercalating solution such as sulfuric acid to form a graphite intercalation compound (a graphite salt).
  • a thermal decomposition is carried out at about 1000 ° C, wherein the expanded graphite, the stored agents are removed.
  • the expanded graphite thus obtained can be further processed, for example, by compounding, pressing, impregnating, laminating and calendering.
  • the expanded graphite may be further densified into graphite sheets or plates.
  • the precompressed graphite plate may also be further impregnated with resins.
  • Expanded graphites are commercially available, for example, from SGL Carbon SE.
  • a precompressed sheet based on expanded graphite comprises an expanded graphite that has been compacted but is still compressible. That is, as the precompressed graphite plate is meant an expanded graphite in the form of a plate which is partially compressed and therefore both pressed and pressable.
  • the pre-compressed graphite plate is formed as at least one plate.
  • the precompressed plate comprising more than one plate has stacked plates. The stacked plates may be adhered by means of an adhesive such as a phenolic resin.
  • the material disposed on the cathode block consists of a precompressed graphite plate based on expanded graphite.
  • inorganic or organic additives for example, titanium diboride and zirconium diboride may be incorporated.
  • the precompressed graphite plate is formed as a film.
  • Sheets are thin, flexible and can be easily adapted to the shape of their environment.
  • the film can be easily adapted to the dimensions of a joint between cathode blocks and to the surface condition of cathode blocks.
  • a film has a leaf-shaped structure. Therefore, a film further has the advantage of being stackable without forming voids.
  • the cathode bottom comprises at least one cathode block, which is arranged at a predetermined distance from a further cathode block such that at least one joint is formed between them.
  • the material comprising the precompressed sheet based on expanded graphite fills the joint and frictionally connects the cathode blocks.
  • the material serves as a filler between the two cathode blocks, which is not only able to seal the joint between the two cathode blocks, but also, due to its compressible character, is able to compensate for expansions of the cathode blocks that occur during electrolysis.
  • the material and the cathode blocks are non-positively connected and preferably terminate flush.
  • the material and cathode block can be glued together, for example by means of a phenolic resin.
  • the cathode blocks preferably have a greater length than width dimension, while the width and height dimensions are approximately equal.
  • cathode blocks are up to 3800 mm long, 700 mm wide and 500 mm high.
  • the at least two cathode blocks are arranged such that their length dimensions are parallel.
  • the predetermined distance between two cathode blocks is about 1/10 to 1/100 of the width dimension of the cathode block. A reduction in the distance between cathode blocks is possible by using the material according to the present invention.
  • the distance between cathode blocks using conventional ramming masses as filler between them must be at least 40 mm, while it can be reduced to 10 mm by using the precompacted graphite plate.
  • the effective cathode block surface increases by approximately 5%.
  • the at least one cathode block comprises at least one means for connection to a current source.
  • the cathode block at least one recess for receiving a busbar, which is connectable to a power source. If at least two cathode blocks are aligned so that their length dimensions are parallel, the recess is preferably oriented in the longitudinal direction of the cathode block, ie the recess runs parallel to the gap formed between two cathode blocks.
  • the cathode bottom may further comprise a composite element between the cathode block and the bus bar such as a contact mass and the like.
  • the at least one cathode block is designed such that it is electrically and thermally conductive, is resistant to high temperatures, is chemically stable with respect to bath components of the electrolysis and can not form an alloy with aluminum.
  • the cathode block is preferably formed from graphite, semi-graphitic, graphitized, semi-graphitized and / or amorphous carbon. Most preferably, the cathode block comprises graphite or graphitized carbon because it most satisfies the thermal and electrical conductivity and chemical resistance requirements for forming a cathode bottom in an electrolytic cell for producing aluminum.
  • the cathode bottom according to the invention comprises regions having a high conductivity with the at least two cathode blocks, and regions which are typically lower in conductivity than the cathode blocks but capable of the material comprising the precompressed expanded graphite plate are to seal the joints formed between the cathode blocks in such a way that no bath components can penetrate into areas of the cathode bottom during electrolysis.
  • the two components, ie cathode blocks and precompressed graphite plate, therefore fulfill different functions of the cathode bottom. Due to its multifunctional design this is Cathode bottom therefore dimensioned for large-scale use.
  • a surface of the at least one cathode block, which is opposite to a surface of a further cathode block is structured.
  • a structured surface can be produced, for example, by roughening the surface.
  • a surface of the at least one cathode block, which is opposite to a surface of a further cathode block has at least one groove, which may extend in a zigzag shape, for example. The grooving or structuring of the surface of the cathode block improves the fitting of the precompressed graphite plate in the joint.
  • the precompressed graphite plate is arranged on the structured or grooved surface and optionally glued to it, thereby filling the grooved or structured surface of the cathode block.
  • the pre-compressed graphite plate By filling the grooved or structured surface with the pre-compressed graphite plate, it fits into the surface of the cathode block in a form-fitting manner.
  • the connection between the precompressed graphite plate and the cathode block is both positive and positive in this embodiment.
  • the number and dimensions of the grooves in the surface of the cathode block depend on the dimensions of the cathode block. Likewise, the degree of roughening of the surface of the cathode block depends on its dimensions.
  • the material is disposed on two opposing surfaces of a cathode block adjacent to the seam-forming surface and on and in the seam so that the material is flush. That the material is flush, in the sense of present invention, that the material is arranged on the cathode blocks such that the cathode bottom in each case uniform dimensions along its. Length, height and width. In a cathode bottom in an electrolytic cell, there is a gap between the sidewalls of the electrolytic cell and cathode blocks. The material in this case is arranged to fill the joints between the cathode blocks as well as the areas between cathode blocks and sidewalls and the areas between the joints filled with the material and the sidewalls.
  • the cathode bottom thus forms the entire bottom of the electrolytic cell, ie it extends to all side walls of the electrolytic cell, wherein he areas of high thermal and electrical conductivity in the form of cathode blocks and areas of lower thermal and electrical conductivity in the form of the expanded graphite material having.
  • all surfaces of a cathode block are structured and / or grooved, which are in contact with the material comprising the precompressed sheet based on expanded graphite, so that the material is not only non-positively but also positively connected to these surfaces.
  • a cathode bottom having a precompressed sheet based on expanded graphite By manufacturing a cathode bottom having a precompressed sheet based on expanded graphite, a high effective cathode area is achieved by allowing a plurality of cathode blocks to be stacked together.
  • the preparation of the cathode block is carried out such that the material is frictionally connected by its arrangement on the at least one cathode block with this, if necessary, an additional adhesive is used.
  • a frictional connection between the cathode blocks is achieved by means of the precompressed graphite plate.
  • the arrangement of the further cathode block is realized by hydraulic or mechanical pressing, possibly with the use of adhesive.
  • the inventive method it is possible to reduce the width of the joint between cathode blocks compared to conventional joint widths and thus to increase the effective cathode area.
  • the pre-compressed graphite plate filling the joint is compressible, but partially reversible, so that it can compensate for expansions of the cathode blocks.
  • a precompressed graphite plate is understood to mean a partially compressed expanded graphite which is pressed and can still be pressed. After arranging the further cathode block, a pre-compressed graphite plate is obtained in the joint, which is a little elastic material that seals the joint without formation of voids.
  • the step of arranging at least one further cathode block may be before or after Arranging the material can be performed on the at least one cathode block.
  • the method step of arranging the material on at least one surface of the at least one cathode block comprises attachment to the surface of at least one cathode block by means of an adhesive.
  • an adhesive for example, a phenol resin can be used.
  • the cathode blocks can be provided with filters before or after their supply, which allow their connection to a power source.
  • a cathode block can be provided with at least one recess, into which at least one bus bar is inserted, which can be connected to a current source.
  • a treated cathode block can be provided before or after its provision with further means, for example, a contact mass can be arranged between the cathode block and the busbar.
  • the precompressed sheet used in the process of the invention is formed as a sheet based on expanded graphite.
  • the use as a film is advantageous because the film can easily adapt to the shape of the joint or to the surface texture of a cathode block.
  • the film can be optimally arranged on the cathode block, without resulting in edges, beads or other unevenness in areas of the Adjacent or cover cathode block or without an uneven filling of a formed between cathode blocks gap is formed, which leads to cavities within the cathode bottom.
  • the adaptation of the film is realized for example by means of cutting the film according to the dimensions of the cathode block.
  • the method according to the invention further comprises, before or after the provision of the at least one cathode block, the following method step: structuring at least one surface of the at least cathode block.
  • the structuring can be realized by roughening the surface or by grooving the surface.
  • at least one surface of a cathode block is structured, which lies opposite a surface of at least one further cathode block.
  • a grooving can be realized for example by means of cutting tools, while a roughening can be generated by an abrasive tool.
  • the cathode bottom according to the invention is used in an electrolysis cell for the production of aluminum.
  • the electrolysis cell comprises a trough, which as a rule comprises iron sheet or steel and has a round or quadrangular, preferably rectangular, shape.
  • the side walls of the tub may be lined with carbon, carbide or silicon carbide.
  • at least the bottom of the tub is lined with a thermal insulation.
  • On the bottom of the tub or on the heat insulation of the cathode bottom is arranged.
  • At least two, preferably 10 to 24, cathode blocks are arranged parallel to each other with respect to their length dimension at a predetermined distance, so that between each one a gap is formed, which is filled with at least one precompressed sheet based on expanded graphite.
  • the spaces between side walls and filled gap and between side walls and cathode blocks are optionally with material that is a pre-compressed Comprises expanded graphite board, or filled with conventional anthracite ramming mass.
  • the cathode blocks are connected to the negative pole of a power source.
  • At least one anode such as a Soderberg electrode, hangs from a support frame connected to the positive pole of the power source and projects into the tub without touching the cathode bottom or sidewalls of the tub.
  • the distance of the anode to the walls is greater than to the cathode bottom or the forming aluminum layer.
  • a solution of alumina in molten cryolite at a temperature of about 960 ° C is subjected to fused-salt electrolysis, with the sidewalls of the well coating a solid crust of the melt mixture while the aluminum is heavier than the melt , accumulated under the melt.
  • FIG. 1 shows a schematic cross-sectional view of a cathode bottom according to the invention 1.
  • the cathode bottom 1 comprises material 3 from a pre-compressed graphite plate, which fills a gap 5, which is formed between two cathode blocks 7.
  • the cathode blocks 7 have a sufficient electrical and thermal conductivity for use in a fused-salt electrolysis and are made for example of graphitized carbon.
  • the cathode blocks 7 each have a recess 9 for receiving a bus bar (not shown), which allow their connection to a power source.
  • the material 3 and the cathode blocks 7 are flush.
  • FIG. 2 shows a schematic cross-sectional view of another cathode bottom according to the invention 21.
  • the cathode bottom comprises material 23 of a pre-compressed graphite plate, which fills a joint 25 which is formed between two cathode blocks 27.
  • the material 23 and the cathode blocks 27 are flush.
  • the cathode blocks 27 have sufficient electrical and thermal conductivity for use in fused-salt electrolysis and are made, for example, from graphitized carbon.
  • the cathode blocks 27 each have a recess 29 for receiving a bus bar (not shown), which allow their connection to a power source, the cathode blocks 27 further each have two grooves 211 on.
  • the grooves 211 are respectively disposed on a surface of a cathode block 27, which faces a surface of the other cathode block 27.
  • the material 23 fills the groove 25 and the grooves 211.
  • the grooves 211 support the frictional connection between the material 23 and the cathode blocks 27 by a positive connection with the material 23.
  • Each cathode block 27 has two grooves 211, but the number of grooves 211 formed in a cathode block 27 is arbitrary and depends on the dimensions of the cathode block 27.
  • FIG. 3 shows a schematic cross-sectional view of a portion of an electrolytic cell 313 for the production of aluminum.
  • the electrolytic cell 313 has a tub 315 made of steel.
  • the side walls 317 of the trough 315, one of which in Fig. 3 are lined with blocks 319 of graphite, one of which is in Fig. 3 is shown.
  • the bottom of the tub 315 is lined with a heat-insulating layer 321 so that it is completely covered by it.
  • the cathode bottom 31 has material 33 and cathode blocks 37, two of which are in Fig. 3 are shown, which are arranged at a predetermined distance, and ramming mass 34.
  • the material 33 comprises a precompressed graphite plate.
  • Ramming mass 34 includes conventional ramming mass of carbon. Between the cathode blocks 37, a joint 35 is formed in each case.
  • the material 33 fills the gap 35, and the ramming mass 34 fills the respective space between the cathode block 37 and side wall 317 such that the heat-insulating layer 321 is completely covered with the cathode bottom 31 comprising the ramming mass 34, the material 33 and the cathode blocks 37.
  • the material 33 is flush with the cathode blocks 37.
  • the cathode blocks 37 each have a recess 39 suitable for receiving a bus bar (not shown) which is connectable to a negative pole of a current source (not shown).
  • the electrolytic cell 313 anodes 323, of which two in Fig. 3 , each of which is suspended from a support 325 connected to a positive pole of a power source (not shown).
  • a solution 327 of alumina in molten cryolite In the electrolytic cell 313 is a solution 327 of alumina in molten cryolite. During electrolysis, aluminum 329 collects between the solution 327 and the cathode bottom 31.
  • FIG. 4 shows a schematic cross-sectional view of part of another electrolytic cell 413 for the production of aluminum
  • the electrolytic cell 413 has a tub 415 made of steel.
  • the side walls 417 of the tub 415, one of which is in Fig. 4 are lined with blocks 419 of graphite, one of which is in Fig. 4 is shown.
  • Prefabricated blocks 431 made of carbon or graphite, of which one is in. Are also arranged on the blocks 419 made of graphite Fig. 4 is shown.
  • the bottom of the tub 415 is lined with a heat-insulating layer 421 so that it is completely covered by it. On the heat-insulating layer 421, a cathode bottom 41 is disposed.
  • the cathode bottom 41 has material 43 and cathode blocks 47, two of which are in Fig. 4 are shown, which are arranged at a predetermined distance.
  • the material 43 comprises a precompressed graphite plate. Between the cathode blocks 47, a joint 45 is formed in each case.
  • the material 43 fills the gap 45 and further material 43 fills a gap between a cathode block 47 and the block 431 such that the heat insulating layer 421 is completely covered with the cathode bottom 41 comprising the material 43 and the cathode blocks 47.
  • the material 43 is flush with the cathode blocks 47.
  • the cathode blocks 47 each have a recess 49 suitable for receiving a bus bar (not shown) which is connectable to a negative pole of a current source (not shown).
  • the electrolytic cell 413 anodes 423, in front of which two in Fig. 4 2, which respectively hang on a support 425 connected to a positive pole of a power source (not shown).
  • a solution 427 of alumina in molten cryolite In the electrolytic cell 413 is a solution 427 of alumina in molten cryolite. During electrolysis, aluminum 429 collects between the solution 427 and the cathode bottom 41.
  • FIGS. 5a to 5c show a schematic representation of a process sequence for producing a cathode bottom 51 according to the invention.
  • FIG. 5a shows the provision of two cathode blocks 57, which are arranged at a predetermined distance such that a gap 55 is formed.
  • the material 53 is inserted, which comprises a pre-compressed graphite plate.
  • FIG. 5c shows the cathode bottom 51, as it can be used for an electrolytic cell for the production of aluminum. The material 53 fills the gap 55. The amount and dimensions of the material 53 are selected such that the material 53 is flush with the cathode blocks 57 and fills the gap 55 completely. It should be noted that any connections and connecting means of the cathode bottom 51 to a power source in the FIGS. 5a to 5c have been omitted for clarity.
  • FIGS. 6a to 6c show a schematic representation of a further process sequence for producing a cathode bottom 61 according to the invention.
  • FIG. 6a shows the provision of a cathode block 67 having a recess 69 for receiving a bus bar (not shown).
  • material 63 comprising a precompressed graphite plate is planarized on a surface of the cathode block 67, optionally using an adhesive for attachment.
  • further material 63 may be arranged to form a stack of material 63 (not shown) disposed on the cathode block 67.
  • FIG. 6c shows that a further cathode block 67 is arranged with a recess 69 on the material 63 such that it is frictionally connected to the cathode block 67 by means of the material 63.
  • FIG. 6c shows the cathode bottom 61, as it can be used for an electrolytic cell for the production of aluminum.
  • a cathode bottom can be fabricated with a plurality of cathode blocks arranged side by side. It should be noted that any connections and connecting means of the cathode bottom 61 to a power source in Figures 6a to 6c have been omitted for clarity.

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  • Chemical Kinetics & Catalysis (AREA)
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Claims (11)

  1. Base de cathode (1, 21, 31, 41, 51, 61) destinée à une cellule électrolytique pour produire de l'aluminium, comprenant un matériau (3, 23, 33, 46, 53, 63) disposé sur au moins un bloc cathodique (7, 27, 37, 47, 57, 67), caractérisée en ce que le matériau (3, 23, 33, 43, 53, 63) comprend une plaque précomprimée à base de graphite expansé, l'au moins un bloc cathodique (7, 27, 37, 47, 57) étant disposé à une distance prédéterminée d'au mois un autre bloc cathodique (7, 27, 37, 47, 57, 67) et/ou d'une paroi latérale (317, 417) de la cellule électrolytique de manière à ce qu'au moins un espace (5, 25, 35, 45, 55, 65, 65) soit formé entre eux, le matériau (3, 23, 33, 43, 53, 63) remplissant l'espace (5, 25, 35, 45, 55, 65).
  2. Base de cathode (1, 21, 31, 41, 51, 61) selon la revendication 1, caractérisée en ce que le matériau disposé sur le bloc cathodique est constitué d'une plaque de graphite précomprimée à base de graphite expansé.
  3. Base de cathode (1, 21, 31, 41, 51, 61) selon la revendication 1 ou la revendication 2, caractérisée en ce que la plaque précomprimée est conçue comme un film.
  4. Base de cathode (21) selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'une surface du bloc cathodique (27) qui est opposée à une surface de l'autre bloc cathodique (27) a une surface structurée.
  5. Base de cathode (21) selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'une surface du bloc cathodique (27) qui est opposée à une surface de l'autre bloc cathodique (27) a au moins une rainure (211).
  6. Base de cathode (41) selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le matériau (43) est disposé sur deux surfaces opposées d'un bloc cathodique (47) qui sont adjacentes à la surface du bloc cathodique (47) formant l'espace (45), et est disposé au-dessus et dans l'espace (45) de sorte que le matériau (43) soit affleurant.
  7. Procédé de production d'une base de cathode (1, 21, 31, 41, 51, 61), comprenant les étapes de procédé suivantes
    • fournir au moins un bloc cathodique (7, 27, 37, 47, 57, 67),
    • disposer un matériau (3, 23, 33, 43, 53, 63) sur au moins une surface de l'au moins un bloc cathodique (7, 27, 37, 47, 57, 67), le matériau (3, 23, 33, 43, 53, 63) comprenant au moins une plaque précomprimée à base de graphite expansé,
    • disposer au moins un autre bloc cathodique (7, 27, 37, 47, 57, 67) à une distance prédéterminée de l'au moins un bloc cathodique (7, 27, 37, 47, 57, 67) de manière à ce que le matériau (3, 23, 33, 43, 53, 63) remplisse un espace (5, 25, 35, 45, 55, 65) formé en disposant l'autre bloc cathodique (7, 27, 37, 47, 57, 67) à la distance prédéterminée de l'au moins un bloc cathodique (7, 27, 37, 47, 57, 67).
  8. Procédé selon la revendication 7, caractérisé en ce que la disposition du matériau sur au moins une surface de l'au moins un bloc cathodique comprend |a fixation à la surface au moyen d'un adhésif.
  9. Procédé selon la revendication 7 ou la revendication 8, caractérisé en ce que le matériau (3, 23, 33, 43, 53, 63) est conçu comme un film.
  10. Procédé selon l'une quelconque des revendications 7 à 9, comprenant en outre l'étape de procédé suivante avant ou après avoir fourni l'au moins un bloc cathodique (27)
    • structurer au moins une surface de l'au moins un bloc cathodique (27).
  11. Utilisation d'une base de cathode (31, 41) selon l'une quelconque des revendications 1 à 6 dans une cellule électrolytique (313, 413) pour produire de l'aluminium.
EP10721169.0A 2009-06-09 2010-06-01 Plancher formant cathode, procédé de production d'un plancher formant cathode, et utilisation dudit plancher dans une cellule d'électrolyse pour la production d'aluminium Active EP2440688B8 (fr)

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PL10721169T PL2440688T3 (pl) 2009-06-09 2010-06-01 Dno katodowe, sposób wytwarzania dna katodowego i jego zastosowanie w elektrolizerze do wytwarzania aluminium

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DE102009024881A DE102009024881A1 (de) 2009-06-09 2009-06-09 Kathodenboden, Verfahren zur Herstellung eines Kathodenbodens und Verwendung desselben in einer Elektrolysezelle zur Herstellung von Aluminium
PCT/EP2010/057667 WO2010142580A1 (fr) 2009-06-09 2010-06-01 Plancher formant cathode, procédé de production d'un plancher formant cathode, et utilisation dudit plancher dans une cellule d'électrolyse pour la production d'aluminium

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EP2440688A1 EP2440688A1 (fr) 2012-04-18
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US (1) US20120085639A1 (fr)
EP (1) EP2440688B8 (fr)
JP (1) JP5832996B2 (fr)
CN (1) CN102449202B (fr)
AU (1) AU2010257604B2 (fr)
BR (1) BRPI1011421B1 (fr)
CA (1) CA2757336C (fr)
DE (1) DE102009024881A1 (fr)
PL (1) PL2440688T3 (fr)
RU (1) RU2567777C2 (fr)
UA (1) UA109767C2 (fr)
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ZA (1) ZA201106928B (fr)

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UA111247C2 (uk) * 2011-11-11 2016-04-11 Сгл Карбон Се Спосіб вимірювання профілів поверхонь в працюючих алюмінієвих електролізерах
DE102012218960B4 (de) 2012-10-17 2014-11-27 Sgl Carbon Se Kathode umfassend Kathodenblöcke mit teilweise trapezförmigem Querschnitt
DE102012218959A1 (de) 2012-10-17 2014-04-30 Sgl Carbon Se Kathodenblock mit trapezförmigem Querschnitt
WO2014060422A2 (fr) 2012-10-17 2014-04-24 Sgl Carbon Se Bloc cathodique présentant une section transversale trapézoïdale
DE102012218958A1 (de) 2012-10-17 2014-04-30 Sgl Carbon Se Kathodenblock mit trapezförmigem Querschnitt
DE102015011952A1 (de) * 2015-09-18 2017-03-23 Sgl Carbon Se Kathodenboden, Verfahren zur Herstellung eines Kathodenbodens und Verwendung desselben in einer Elektolysezelle zur Herstellung von Aluminium
CA3031708C (fr) 2016-07-26 2022-08-23 Cobex Gmbh Ensemble cathode pour la production d'aluminium

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DE102009024881A1 (de) 2010-12-16
RU2011138837A (ru) 2013-03-27
CN102449202A (zh) 2012-05-09
PL2440688T3 (pl) 2019-07-31
BRPI1011421B1 (pt) 2019-10-08
EP2440688A1 (fr) 2012-04-18
RU2567777C2 (ru) 2015-11-10
ZA201106928B (en) 2012-12-27
EP2440688B8 (fr) 2019-02-27
JP5832996B2 (ja) 2015-12-16
AU2010257604B2 (en) 2015-05-28
BRPI1011421A2 (pt) 2016-03-15
US20120085639A1 (en) 2012-04-12
JP2012529567A (ja) 2012-11-22
CA2757336A1 (fr) 2010-12-16
UA109767C2 (uk) 2015-10-12
CA2757336C (fr) 2017-11-21
CN102449202B (zh) 2016-09-28
WO2010142580A1 (fr) 2010-12-16
AU2010257604A1 (en) 2011-11-10

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