EP3099843B1 - Vorrichtung zur speicherung einer last über einer elektrolysezelle - Google Patents

Vorrichtung zur speicherung einer last über einer elektrolysezelle Download PDF

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Publication number
EP3099843B1
EP3099843B1 EP15740471.6A EP15740471A EP3099843B1 EP 3099843 B1 EP3099843 B1 EP 3099843B1 EP 15740471 A EP15740471 A EP 15740471A EP 3099843 B1 EP3099843 B1 EP 3099843B1
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EP
European Patent Office
Prior art keywords
storage device
electrolytic cell
anode assembly
electrolysis
covers
Prior art date
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Application number
EP15740471.6A
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English (en)
French (fr)
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EP3099843A1 (de
EP3099843A4 (de
Inventor
Marc BEYSSON
Stéphane Petit
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Rio Tinto Alcan International Ltd
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Rio Tinto Alcan International Ltd
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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
    • C25C3/10—External supporting frames or structures
    • 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
    • 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
    • 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
    • C25C3/14—Devices for feeding or crust breaking
    • 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
    • C25C7/06—Operating or servicing

Definitions

  • the present invention relates to a charge storage device for an electrolytic cell, a storage system comprising this device, an electrolytic cell and an electrolysis plant comprising this device, as well as a method for changing the 'an anode assembly using this storage device.
  • Aluminum is conventionally produced in aluminum smelters, by electrolysis, according to the Hall-Héroult process.
  • An aluminum smelter traditionally comprises several hundred electrolytic cells connected in series and traversed by an electrolytic current whose intensity can reach several hundred thousand Ampere.
  • the electrolysis cells are arranged transversely to the direction of circulation of the electrolysis current on the scale of the series.
  • Two adjacent electrolytic cells in the series are separated by an inter-cell aisle.
  • a wider operating aisle substantially perpendicular to a longitudinal direction of the tanks and to the inter-tank aisles, extends along the series to allow access and circulation of vehicles and personnel on foot.
  • Electrolytic cells conventionally comprise a steel box inside which is arranged a coating of refractory materials, a cathode of carbonaceous material, crossed by cathode conductors intended to collect the electrolysis current at the cathode to lead it to '' to cathode outlets crossing the bottom or sides of the box, routing conductors extending substantially horizontally to the next tank from the cathode outlets, an electrolytic bath in which the alumina is dissolved, at least one set anode comprising at least one anode immersed in this electrolytic bath and an anode rod sealed in the anode, an anode frame to which the anode assembly is suspended via the anode rod, and conductors for increasing the electrolysis current, extending from bottom to top, connected to the routing conductors of the previous electrolytic cell to convey the electrolysis current from the cathode outputs s up to the anode frame and to the anode assembly and the anode of the next tank.
  • the anodes are more particularly of the
  • the box includes edges delimiting an opening through which the anode assemblies are introduced into the electrolysis tank.
  • anode assemblies are consumed during the electrolysis reaction and must therefore be replaced by new anode assemblies.
  • some of the covers are therefore removed to open an access window inside the electrolytic cell.
  • the spent anode assembly is extracted from the electrolytic cell through this access window and deposited on a support.
  • the used spent anode assembly is thus temporarily stored on the support before it can be taken to a revaluation zone.
  • the crusts formed by the covering products periodically introduced into the electrolytic bath are removed and deposited in a crust collection device (or crust bin) with a cleaning tool also called crust shovel. This tool is inserted into the electrolytic cell through the access window.
  • a new anode assembly is then introduced into the electrolytic cell, via the access window, in place of the used anode assembly.
  • the removable covers initially removed are replaced to close the access window.
  • the access window therefore remains open for the duration of the anodic assembly change.
  • anode devices and assemblies necessary for an anode assembly change such as the new anode assembly, the support for a worn anode assembly and the crust collection device, are temporarily stored near the tank. electrolysis for which this change in anode assembly must be carried out.
  • this storage location is far from the intervention area. Indeed, this storage location is located at one end of the electrolysis tank.
  • the electrolysis service machines such as a handling bridge, used to move the new and used anode assemblies, and the devices such as the crust shovel, therefore run between their storage location at the end of the tank and the intervention area, a significant distance.
  • the various successive stages of the anodic assembly change process impose several round trips between the intervention area and the operating aisle where the storage location is located.
  • the distance traveled by the electrolysis service machine for a round trip, and the number of successive round trips, determine the intervention time during which the access window remains open.
  • the present invention aims to overcome all or part of these drawbacks by proposing in particular a device for storing a load intended to limit the size of the operating aisle and to reduce the duration of opening of a tank. electrolysis during an anode assembly change, as well as a method for changing an anode assembly using this storage device.
  • the subject of the present invention is a device for storing a charge above an electrolytic cell comprising a box, covers, a cathode and anode assemblies arranged in the box and covered by the covers.
  • the charge storage device comprising support means, on which is intended to rest the charge to be stored above the electrolysis tank in a volume formed by vertical translation of the surface obtained by projection of the electrolysis tank in a horizontal plane, and support means, designed so that the means of support rest stably above the electrolytic cell, in particular above the anode assemblies and covers.
  • the storage device makes it possible to provide a temporary storage space above an electrolytic cell, and more particularly above the anode assemblies and covers.
  • the terms "above" an element mean above this element in a volume formed by vertical translation of the surface obtained by projection of this element in a horizontal plane.
  • the storage space being above the electrolysis tank, the operating aisle is no longer congested.
  • the storage device allows positioning as close as possible to the removable cover or covers which will be removed to provide an access window during an intervention on the tank as a change of anodic assembly.
  • the support means comprise one or more support surfaces adapted to support a new anode assembly, a used anode assembly and / or a device for collecting crusts formed during an electrolysis reaction.
  • the charge is therefore more particularly a new anode assembly, a used anode assembly and / or a device for collecting crusts formed during an electrolysis reaction.
  • the storage device is adapted to be used in the context of an anodic assembly change.
  • the support means comprise means for preventing a sliding or a fall of the supported load.
  • the support means comprise an anticorrosion means such as a support or an anticorrosion coating.
  • the support means are particularly suitable for receiving a spent anode assembly removed from the electrolytic bath, and have an improved longevity.
  • the storage device comprises docking means to allow its handling by displacement means.
  • the storage device can be moved to be positioned above the electrolysis tank where a charge must be temporarily stored.
  • the displacement means can comprise a handling machine or a handling bridge, generally known by the name of electrolysis service machine.
  • the storage device is therefore mobile and easy to use for temporary load storage associated with an operation on a tank such as an anodic assembly change.
  • the docking means can advantageously be shaped to allow the storage device to be lifted.
  • the lifting allows not only to position the storage device above the electrolysis tank, to move the storage device along the electrolysis tank to position it as close as possible to the intervention area, but also possibly to position a storage device above an electrolytic cell adjacent to that where the change of anode assembly is to be made.
  • the support means have a substantially planar plate shape, intended to extend in a substantially horizontal plane.
  • the plate has two opposite transverse edges, and the support means extend exclusively from the two transverse edges.
  • the support means delimit between them a space which can correspond substantially to the length of the plate.
  • the support means extend in a substantially rectilinear manner and perpendicular to the plate.
  • the support means comprise an end attached to a lower face of the support means.
  • This characteristic offers more robustness to the storage device or, where appropriate, to the storage devices.
  • the plate has reinforcing means making it possible to limit its bending under the effect of the weight of a load.
  • the support means are more robust and more resistant to bending. This avoids that, due to significant bending, part of the support means come into contact with hoods of the electrolytic cell, which risks deforming these hoods.
  • the reinforcing means comprise two flanges extending along longitudinal edges of the plate.
  • the support means have a lower face provided with thermal insulation means.
  • the support means are less deformed under the effect of the temperature above the electrolysis tank.
  • the support means comprise two concave housings, integral with the support means, and designed to suspend an anode assembly there.
  • the support means allow an anodic assembly to be suspended there. This has the advantage of being able to move the storage device and the anode assembly that the storage device supports together, with a limited risk of falling.
  • the storage device comprises spacer means for making the two concave housings integral.
  • the invention also relates to a storage system comprising several storage devices having the above-mentioned characteristics, distinct and independent, suitable for storing, above the electrolytic cell, a new anode assembly, a used anode assembly and a storage device. collection of crusts formed during an electrolysis reaction.
  • This arrangement therefore offers shorter distances between the intervention area and the storage space, so that the time necessary for the change of anode assembly is limited.
  • the storage system comprises three storage devices, including a first storage device intended to support the new anode assembly, a second storage device intended to support the used anode assembly, and a third device storage intended to support the crust collection device.
  • the new anode assembly, the used anode assembly and the crust collection device each have a dedicated storage device.
  • two of the three storage devices can be positioned on either side of this access window, while the remaining storage device can be positioned above an electrolytic cell adjacent to that for which the anodic assembly must be changed, opposite the access window.
  • this embodiment allows a staggered or triangular arrangement of the storage devices, so that the period during which the electrolysis cell is open can be significantly reduced.
  • the invention also relates to an electrolysis tank comprising a box, covers, a cathode and anode assemblies arranged inside the box and covered by the covers, and a storage device having the aforementioned characteristics. , said storage device extending above the electrolytic cell.
  • the electrolytic cell associated with the storage device offers the possibility of storing a charge above the anode assemblies and covers, which limits the space requirement around this electrolytic cell.
  • the storage device is disposed above the anode assemblies in place inside the box and the covers arranged above these anode assemblies.
  • the storage device is arranged above the anode assemblies in production and closed covers maintaining a confinement of the gases above these anodic sets.
  • the covers close off an opening in the electrolysis tank through which the anode assemblies are intended to be inserted or extracted inside or outside the box, and the storage device is arranged above the covers of the tank. 'electrolysis.
  • the electrolytic cell comprises two opposite longitudinal sides and the storage device extends between the two opposite longitudinal sides.
  • the electrolysis cell comprises a substantially parallelepipedal confinement enclosure placed on the edges of the box, the confinement enclosure forming a confinement volume inside which the anode assemblies are intended to move at during the electrolysis reaction, and the storage device extends between two opposite longitudinal upper edges of the confinement enclosure.
  • the support means rest on the opposite longitudinal upper edges of the confinement enclosure and these edges are advantageously formed by a sheath for capturing tank gases.
  • the support means comprise support surfaces intended to come to bear against a fixed structure of the electrolytic cell.
  • the bearing surfaces advantageously do not bear on the covers of the electrolytic cell.
  • the supports of the hoods are located at their transverse sides, and more particularly at the longitudinal edges of the electrolysis tank, so that they can bend under the effect of the weight of a charge.
  • the bending of a cover relative to an adjacent cover can create an opening between these two covers which can cause heat losses and gas leaks.
  • the fixed structure comprises reinforcing means designed to allow the fixed structure to support the weight of the storage device and, where appropriate, of the load supported by the storage device.
  • the electrolytic cell comprises at least two counter-bearing surfaces, on which are intended to rest the bearing surfaces of the storage device, the two counter-bearing surfaces being arranged on either side of a longitudinal median plane of the electrolytic cell.
  • This feature provides stable support for the storage device.
  • the two abutment surfaces are arranged on longitudinal sides of the electrolysis tank.
  • the storage device if necessary the storage devices, extend in a transverse direction Y of the electrolytic cell.
  • the electrolysis cell comprises at least two counter-bearing surfaces, on which are intended to rest the bearing surfaces of the storage device, and the bearing surfaces and the counter-surfaces support include interlocking means intended to cooperate by complementarity of form.
  • the support means extend away from the covers of the electrolytic cell.
  • the anode assembly comprises an anode support extending in a transverse direction of the electrolysis tank.
  • the anode assembly does not include a vertical rod, as in the prior art, which makes it possible to reduce the height of the anode assembly. This avoids oversizing the storage device, in order to contain costs, and to easily set up this storage device.
  • this relates to an electrolysis plant, in particular an aluminum smelter, comprising a series of electrolysis cells, including an electrolysis cell and at least one storage device having the aforementioned characteristics, and an operating aisle extending substantially parallel to the series of electrolytic cells.
  • This electrolysis plant offers a limited footprint and a lower operating cost than pre-existing electrolysis plants.
  • this electrolysis plant offers shorter distances to be traveled by electrolysis service machines handling the charge, therefore a significantly shorter opening time when an access window is provided through the covers for access the inside of the electrolysis tank.
  • the support means comprise support surfaces intended to come to bear against a surface of an inter-tank aisle along a longitudinal edge of the electrolysis tank and separating said electrolysis tank an adjacent electrolytic cell.
  • the counter-bearing surfaces are located inside inter-cell aisles separating the longitudinal sides of two adjacent electrolytic cells from the series of electrolytic cells. More particularly, the abutment surfaces of a storage device are located inside two different inter-cell aisles, on either side of the electrolysis cell above which the storage device is willing.
  • the support means define between them a space such that the electrolytic cell extends between the support means of the storage device.
  • the storage device spans the electrolysis tank.
  • the electrolysis plant comprises displacement means, intended to move the storage device in a substantially longitudinal direction of the electrolysis tank.
  • the displacement means comprise a handling machine or a handling bridge intended to lift the storage device.
  • the same storage device can be used for several electrolytic cells.
  • the electrolysis plant comprises a storage system with several storage devices
  • one of these storage devices can be arranged on a tank adjacent to the tank where an anodic assembly change must take place, precisely in vis-à-vis the part of the tank where the change of anode assembly must take place.
  • the invention also relates to a process for changing a used anode assembly of an electrolytic cell by a new anode assembly, comprising a step of installing a storage device having the above characteristics above the electrolysis tank.
  • This process makes it possible to reduce the duration of the change of anode assembly, therefore the duration during which an access window inside the electrolytic cell is open. This limits heat loss and gas leakage.
  • the positioning step comprises positioning the storage device in line with one or more anode assemblies close to, advantageously adjacent to, the spent anode assembly.
  • This characteristic makes it possible to minimize the distances traveled by an electrolysis service machine intended to handle the elements necessary for changing the anode assembly, including the used anode assembly and the new anode assembly.
  • anode assembly By the right of an anode assembly is meant in a volume formed by vertical translation of the surface obtained by projection of this anode assembly in a horizontal plane.
  • the storage device is not positioned in line with the used anode assembly to allow the extraction of this worn anode assembly from the top, that is to say an extraction by substantially vertical upward translation of this used anode assembly. , and to allow a new anode assembly to be installed from the top, that is to say a substantially vertical downward translation of the new anode assembly.
  • the method is implemented via a storage system comprising several separate storage devices, and the method comprises a step of positioning one of the storage devices of the storage system at the above an electrolytic cell adjacent to the electrolytic cell comprising the spent anode assembly.
  • This characteristic makes it possible to further reduce the duration of the change of anode assembly, by allowing a substantially staggered or triangle arrangement of the storage devices around the spent anode assembly to be replaced.
  • the method comprises the steps consisting in providing an access window between covers of the electrolytic cell to extract the used anode assembly and replace it with a new anode assembly and to arrange said device. storage opposite the access window.
  • this storage device is arranged in a manner substantially symmetrical to the access window with respect to the inter-cell aisle separating the electrolytic cell comprising the spent anode assembly from the electrolytic cell to the above which is positioned this storage device.
  • This arrangement offers the shortest possible distance between this storage device and the access window.
  • the method comprises a step consisting in providing an access window between the covers of the electrolytic cell to extract the used anode assembly and replace it with a new anode assembly and the method includes making an anodic assembly change by means of an electrolysis service machine moving only between transverse sides of the electrolytic cell comprising the spent anodic assembly and if necessary a d electrolysis adjacent to said electrolysis tank comprising the spent anode assembly, during the entire period during which the access window is formed between the covers of the electrolysis tank to extract the worn anode assembly and replace it by the new anode assembly.
  • the electrolysis service machine does not move to the operating aisle running along a transverse side of the electrolytic cell during this entire period.
  • the figure 1 shows a part of an electrolysis plant comprising an electrolytic cell 100 and a storage device 1 according to an embodiment of the invention.
  • the electrolysis tank 100 is intended for the production of aluminum by electrolysis.
  • the storage device is intended to temporarily store a charge above the electrolysis tank 100.
  • the electrolysis tank 100 comprises a box 102, covers 120, a cathode 104 and anode assemblies 106 arranged inside the box 102 and covered by the covers.
  • the storage device 1 will be described in more detail below.
  • the electrolysis tank 100 includes a fixed structure.
  • the fixed structure comprises the box 102 and, where appropriate, parts of a confinement enclosure 108, intended to confine the cell gases generated during the electrolysis reaction.
  • the anode assemblies 106 are movable in substantially vertical translation relative to the fixed structure of the electrolysis tank so that they can be immersed in an electrolytic bath 110 as they are consumed, as can be seen on the figure 2 .
  • Each anode assembly 106 includes an anode support 112, visible for example on the figure 13 , extending substantially parallel to a transverse direction Y of the electrolytic cell 100.
  • the electrolysis tank 100 here comprises four sides, including two longitudinal sides 114 and two transverse sides 116 opposite in pairs, so that the electrolysis tank 100 may have a substantially rectangular shape.
  • the electrolytic cell 100 defines an opening 118 which is intended for the insertion or the extraction of the anode assemblies 106 respectively inside or outside of the electrolytic cell 100.
  • the opening 118 is adapted to allow this insertion or extraction by substantially vertical displacement, respectively descending or ascending, of the anode assemblies 106.
  • the confinement enclosure 108 may be substantially parallelepipedal and placed on the edges of the box 102, as can be seen on the figure 2 .
  • the confinement enclosure 108 forms a confinement volume inside which are intended to move the anode assemblies 106 during the electrolysis reaction, as and when the carbon blocks of the anode assemblies 106 are consumed.
  • the electrolysis tank 100 also comprises a plurality of covers 120.
  • the covers 120 extend from one longitudinal side 114 to the other of the electrolysis tank 100 to close the opening 118.
  • the covers 120 are removable to allow an access window 124 to be formed through the hooding system.
  • This access window 124 provides access to the interior of the electrolysis tank 100 for maintenance operations, for example to break or saw crusts formed on the surface of the electrolytic bath during the electrolysis reaction or to replace an anode assembly.
  • the covers 120 advantageously extend substantially horizontally.
  • Each cover 120 can extend in one piece from one side 114 longitudinal to the other of the electrolysis tank 100.
  • the storage device 1 extends above the electrolysis tank 100.
  • the storage device 1 is arranged above the anode assemblies 106 in place inside the box. In other words, the storage device 1 is arranged above the anode assemblies 106 in production.
  • the storage device 1 extends between the two opposite longitudinal sides 114 of the electrolysis cell and more specifically between two opposite longitudinal upper edges of the confinement enclosure 108.
  • the storage device 1 rests on the opposite longitudinal upper edges of the confinement enclosure 108.
  • the opposite longitudinal upper edges are for example advantageously formed by a tank gas capture sheath (not shown).
  • This capture sheath is part of a system for capturing cell gases which can equip the cell 100 with electrolysis.
  • This system can include a manifold, to which the tank gases are led via the capture sheath, and the capture sheath can include holes allowing air communication with the interior of the confinement enclosure 108 in order to capture tank gases.
  • the storage device 1 is more precisely arranged above the covers 120 of the electrolysis tank 100.
  • the fixed structure may include reinforcing means designed to allow the fixed structure to support the weight of the storage device 1 and, where appropriate, the load supported by the storage device 1.
  • the charge storage device 1 comprises support means, on which is intended to rest the charge to be stored above the electrolysis tank 100, and support means, designed so that the support means rest on stably above the electrolysis tank 100, in particular above the anode assemblies 106, opening 118, covers 120 and enclosure 108 for containment.
  • the support means comprise one or more support surfaces 2 adapted to support a new anode assembly 106a, a worn anode assembly 106b and / or a device 122 for collecting crusts formed during an electrolysis reaction.
  • the load intended to be supported by the support means is therefore a new anode assembly 106a, a worn anode assembly 106b and / or a device 122 for collecting crusts formed during an electrolysis reaction.
  • the collecting device 122 is intended to collect crusts formed by a covering product covering the electrolytic bath of the tank during the electrolysis reaction.
  • the support surface (s) 2 are substantially flat.
  • the support surface (s) 2 are curvilinear.
  • an anode assembly 106 is of the order of ten to twelve tonnes.
  • the mass of a crust collecting device 122 can reach 3 to 4 tonnes.
  • the support means and the support means to which the weight of the support means and of the load (s) is transmitted must therefore be able to support these masses.
  • the support means and, where appropriate, the support means must be able to withstand the temperatures and the thermal radiation above the electrolysis tank 100, without prejudice to their mechanical properties.
  • the support means must be able to fulfill their support function, in a stable manner, of a charge weighing several tonnes despite the temperature above the electrolysis tank 100.
  • the temperatures felt one meter above the electrolysis tank 100 can be higher than 400 ° C., or even more due to the strong radiation of the electrolytic bath. whose temperature is of the order of 1000 ° C.
  • these temperatures can be of the order of 100 ° C.
  • the support means are positioned above covers 120 which are in place, and offset from covers 120 removed for the change of anode assembly, so as to allow the removal of the covers necessary for the change of 'anode assembly and so that the support means are little subject to the radiation of the electrolytic bath.
  • the support means may include means for preventing sliding or falling of the supported load, such as peripheral flanges (not shown).
  • the support surface (s) 2 may advantageously comprise a coating intended to increase the adhesion between the support surface (s) 2 and the load supported.
  • the support means and / or the support means may also comprise anti-corrosion means.
  • the anticorrosion means comprise a specific support or coating adapted to resist attack by the liquids of the electrolytic bath which can flow from the spent anode assembly 106b and at the temperature released by the spent anode assembly 106b.
  • the support means may in particular comprise a containment box inside which the spent anode assembly is stored to confine the gases emitted by the spent anode assembly during its cooling.
  • the storage device 1 comprises docking means to allow its handling by displacement means.
  • the displacement means can comprise a handling machine or a handling bridge (not shown), generally known by the name of electrolysis service machine.
  • the docking means can advantageously be shaped to allow the storage device 1 to be lifted.
  • the docking means comprise hooks (not shown) positioned on the periphery of the storage device 1. This ensures the stability of the load once lifted.
  • the support means have a substantially flat plate 4 shape, intended to extend in a substantially horizontal plane.
  • the plate 4 has in particular two opposite transverse edges 6.
  • the support means advantageously extend exclusively from the two transverse edges 6.
  • the plate 4 may have reinforcing means making it possible to limit its bending under the effect of the weight of a load.
  • the reinforcing means comprise for example two flanges 8 extending along longitudinal edges 10 of the plate 4.
  • the plate 4 can have a substantially rectangular shape.
  • the support means comprise support surfaces and connecting members connecting the support surfaces and the support means, the connection members being able to correspond for example to supporting legs, as shown in the figure 1 .
  • the connecting members 12 extend here in a substantially rectilinear manner and perpendicular to the plate 4. Furthermore, the connecting members 12 may comprise an end attached to a lower face 14 of the support means, in particular of the plate.
  • the support means have a lower face 14 which can be provided with thermal insulation means, such as a covering made of thermally insulating material.
  • the support means comprise two concave housings 16, integral with support means, and designed to suspend an anode assembly 106 therein.
  • the housings 16 are designed to receive and support the anode support 112.
  • the support means include, according to the example of the figure 12 and 13 , two opposite walls 18 from each of which projects one of the concave housings 16.
  • the 16 concave housings are opposite.
  • the storage device 1 comprises spacer means for making the two opposite walls 18 and the two concave housings 16 integral.
  • the spacer means for example comprise walls or link arms 20 intended to extend in a transverse direction X of the electrolytic cell 100.
  • the support means may comprise two independent assemblies, that is to say that can be moved independently of each other, each comprising a surface 22 for support on a fixed structure of the electrolysis tank 100 , like the box 102, and one or more support legs 24 connecting the support surface 22 to the support means.
  • the two assemblies rest on two opposite sides of the electrolysis tank 100.
  • the invention also relates to a storage system comprising several storage devices 1 having the above characteristics, distinct and independent.
  • the storage system is suitable for storing, above the electrolysis tank 100, a new anode assembly 106a, a used anode assembly 106b and a device 122 for collecting crusts formed during an electrolysis reaction.
  • the storage system comprises three storage devices 1, including a first storage device 1a intended to support the new anode assembly 106a, a second storage device 1b intended to support the used anode assembly 106b, and a third device 1c of storage intended to support the device 122 for collecting crusts.
  • the storage system can be adapted to simultaneously support the new anode assembly, the used anode assembly and the crust collection device. This limits the organizational constraints of an anodic overall change.
  • the support means advantageously comprise support surfaces 22 intended to come to bear against a fixed structure of the electrolytic cell 100.
  • the support surfaces 22 do not advantageously bear on hoods 120.
  • the support surfaces 22 are for example intended to rest on a substantially flat surface.
  • the electrolysis tank 100 comprises at least two counter-bearing surfaces (not shown), on which are intended to rest the bearing surfaces 22.
  • the two abutment surfaces are arranged on either side of a longitudinal median plane of the electrolytic cell 100, that is to say a plane substantially perpendicular to the transverse direction Y of the cell 100 d electrolysis and separating this tank into two similar halves.
  • the electrolysis tank can be equipped with the storage system described above.
  • the two abutment surfaces are in particular arranged on either side of the opening 118.
  • the abutment surfaces may preferably be a part of the upper belt of the box 102 or of a collection sheath forming a belt in the upper part of the enclosure 108 for containment.
  • the counter-bearing surfaces are preferably arranged on the longitudinal sides 114 of the electrolysis tank 100.
  • bearing surfaces 22 and the counter-bearing surfaces can advantageously include interlocking means intended to cooperate by complementarity of shape.
  • the nesting means include by example of the pins intended to be inserted into housings of complementary shape.
  • the support means extend away from the covers 120.
  • the invention also relates to the electrolysis plant, in particular an aluminum smelter, comprising a series of electrolytic cells, including the electrolytic cell 100.
  • the electrolysis plant according to the invention also comprises an operating aisle 1001 extending substantially parallel to the series of electrolytic cells, that is to say substantially perpendicular to the cell 100 d 'electrolysis, and a storage device 1 described above.
  • the electrolysis cells are intended to be traversed by an electrolysis current which can reach several hundreds of thousands of amperes.
  • the electrolytic cells can be arranged transversely to the direction of the line or series, that is to say substantially perpendicular to the direction of circulation of the overall electrolysis current on the scale of the line or series.
  • the bearing surfaces 22 may, where appropriate, be in abutment against a surface of an inter-cell aisle 1002 running along a longitudinal edge of the electrolysis tank 100 and separating the electrolysis tank 100 from an electrolysis tank adjacent.
  • the counter-bearing surfaces are located inside inter-cell aisles separating the longitudinal sides of two adjacent electrolytic cells from the series of electrolytic cells.
  • the bearing surfaces 22 can for example bear on a paving or on gratings, reinforced, of the aisle 1002 inter-tanks.
  • bearing surfaces 22 and the counter-bearing surfaces may comprise interlocking means intended to cooperate by complementarity of shape, like those described above.
  • each storage device 1 spans the electrolysis tank 100, as can be seen on the figure 1 or 3 .
  • the support means in particular the connecting members 12, may be distant by a distance greater than the width of the electrolysis tank 100.
  • the support means in particular the connecting members 12, can extend over a height at least greater than the height of the electrolysis tank 100.
  • the electrolysis plant further comprises displacement means, intended to move the storage device 1 above the electrolysis tank in a substantially longitudinal direction X of the electrolysis tank 100.
  • the displacement means comprise a handling device intended to lift the storage device 1.
  • the invention also relates to a method for changing a worn anode assembly 106b of an electrolysis cell, in particular of the electrolysis cell 100 described above, by a new anode assembly 106a.
  • This process includes a step of installing a storage device 1 described above above the electrolysis tank, as can be seen on the figure 4 .
  • the positioning step comprises positioning the storage device 1 in line with one or more anode assemblies close to, advantageously adjacent, the worn anode assembly 106b, as can be seen in the figure 2 .
  • the storage device 1 is not positioned in line with the used anode assembly to allow movement of the covers 120 to open an access window, to allow the extraction of this used anode assembly from the top, it is that is to say an extraction by substantially vertical upward translation of this worn anode assembly, and to allow installation from above of the new anode assembly, that is to say an installation by substantially vertical downward translation of the new anode assembly.
  • the method is implemented via a storage system comprising several separate storage devices 1, and the method comprises a step of positioning one of the storage devices 1 above a tank 101 d electrolysis adjacent to the electrolysis tank 100 comprising the spent anode assembly, as illustrated in FIG. figure 3 .
  • This storage device 1 is arranged opposite an access window 124 formed or soon to be provided between covers 120 in order to extract the used anode assembly 106b and replace it with the new anode assembly 106a .
  • This storage device 1 can therefore be arranged substantially symmetrically with the access window 124 with respect to the inter-cell aisle 1002 separating the electrolytic cell 100 comprising the spent anode assembly from the electrolytic cell 101 above which is positioned this storage device 1.
  • the change of anode assembly is advantageously carried out by means of an electrolysis service machine moving only between transverse sides 116 of the electrolysis tank 100 comprising the spent anode assembly and if necessary of a tank 101 of electrolysis adjacent to the electrolysis tank 100 comprising the spent anode assembly, during the entire period during which the access window 124 is formed between the covers 124.
  • the three storage devices 1a, 1b, 1c can then be moved and positioned above another tank, for example adjacent as visible on the figure 11 .

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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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Secondary Cells (AREA)

Claims (21)

  1. Vorrichtung (1) zur Speicherung einer Last über einer Elektrolysezelle (100), einen Kasten (102), Abdeckungen (120), eine Kathode (104) und Anodenkomplexe (106) umfassend, die in dem Kasten (102) angeordnet sind, und von den Abdeckungen (120) überzogen sind, wobei die Vorrichtung (1) zur Speicherung einer Last Trägermittel, auf denen die über der Elektrolysezelle (100) zu speichernde Last bestimmt ist, in einem Volumen aufzuliegen, das durch vertikale Translation der Oberfläche, die durch Projektion der Elektrolysezelle (100) auf einer horizontalen Ebene erhalten wird, gebildet wird, und Abstützmittel, die gestaltet sind, damit die Trägermittel stabil über der Elektrolysezelle (100), insbesondere über den Anodenkomplexen (106) aufliegen, und Abdeckungen (120) umfasst.
  2. Vorrichtung (1) zur Speicherung nach Anspruch 1, dadurch gekennzeichnet, dass die Trägermittel eine oder mehrere Trägeroberflächen (2) umfassen, die ausgeführt sind, um einen neuen Anodenkomplex (106a), einen gebrauchten Anodenkomplex (106b) und/oder eine Auffangvorrichtung (122) von Krusten zu tragen, die im Laufe einer Elektrolysereaktion gebildet werden.
  3. Vorrichtung (1) zur Speicherung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Vorrichtung (1) zur Speicherung Anlegemittel umfasst, um deren Handhabung durch Verschiebemittel zu ermöglichen.
  4. Vorrichtung (1) zur Speicherung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Trägermittel eine im Wesentlichen ebene Plattenform (4) aufweisen, die dazu bestimmt ist, sich über eine im Wesentlichen horizontale Ebene zu erstrecken.
  5. Vorrichtung (1) zur Speicherung nach Anspruch 4, dadurch gekennzeichnet, dass die Platte (4) Verstärkungsmittel aufweist, die es ermöglichen, deren Biegung unter der Wirkung des Gewichts einer Last zu beschränken.
  6. Vorrichtung (1) zur Speicherung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Trägermittel zwei konkave Aufnahmen (16) umfassen, die fest mit den Abstützmitteln verbunden sind, und gestaltet sind, um daran einen Anodenkomplex aufzuhängen.
  7. System zur Speicherung, mehrere unterschiedliche und unabhängige Vorrichtungen (1) zur Speicherung nach einem der Ansprüche 1 bis 6 umfassend, die ausgeführt sind, um über der Elektrolysezelle (100) einen neuen Anodenkomplex (106a), einen gebrauchten Anodenkomplex (106b) und eine Auffangvorrichtung (122) von Krusten zu speichern, die im Laufe einer Elektrolysereaktion gebildet werden.
  8. System zur Speicherung nach Anspruch 7, dadurch gekennzeichnet, dass das System zur Speicherung drei Vorrichtungen (1) zur Speicherung umfasst, darunter eine erste Vorrichtung (1a) zur Speicherung, die dazu bestimmt ist, den neuen Anodenkomplex (106a) zu tragen, eine zweite Vorrichtung (1b) zur Speicherung, die dazu bestimmt ist, den gebrauchten Anodenkomplex (106b) zu tragen, und eine dritte Vorrichtung (1c) zur Speicherung, die dazu bestimmt ist, die Auffangvorrichtung (122) von Krusten zu tragen.
  9. Elektrolysezelle (100), einen Kasten (102), Abdeckungen (120), eine Kathode (104) und Anodenkomplexe (106) umfassend, die im Inneren des Kastens (102) angeordnet sind, und von den Abdeckungen (120) überzogen sind, und eine Vorrichtung (1) zur Speicherung nach einem der Ansprüche 1 bis 6, wobei sich die Vorrichtung (1) zur Speicherung oberhalb der Elektrolysezelle (100) erstreckt.
  10. Elektrolysezelle (100) und Vorrichtung (1) zur Speicherung nach Anspruch 9, dadurch gekennzeichnet, dass die Vorrichtung (1) zur Speicherung oberhalb der vorhandenen Anodenkomplexe (106), die im Inneren des Kastens (102) vorhanden sind, und der Abdeckungen (120) angeordnet ist, die diese Anodenkomplexe (106) überziehen.
  11. Elektrolysezelle (100) und Vorrichtung (1) zur Speicherung nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass die Elektrolysezelle (100) zwei gegenüberliegende Längsseiten (114) umfasst, und sich die Vorrichtung (1) zur Speicherung zwischen den beiden gegenüberliegenden Längsseiten (114) der Elektrolysezelle (100) erstreckt.
  12. Elektrolysezelle (100) und Vorrichtung (1) zur Speicherung nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass die Abstützmittel der Vorrichtung (1) zur Speicherung Abstützoberflächen (22) umfassen, die dazu bestimmt sind, sich an einer feststehenden Struktur der Elektrolysezelle (100) abzustützen.
  13. Elektrolysezelle (100) und Vorrichtung (1) zur Speicherung nach Anspruch 12, dadurch gekennzeichnet, dass die Elektrolysezelle (100) mindestens zwei Gegenlageroberflächen umfasst, auf denen die Abstützoberflächen der Vorrichtung (1) zur Speicherung bestimmt sind, aufzuliegen, und dadurch, dass die Abstützoberflächen (22) und die Gegenlageroberflächen Steckpassungsmittel umfassen, die dazu bestimmt sind, durch Formergänzung zusammenzuwirken.
  14. Elektrolyseanlage, insbesondere eine Aluminiumhütte, umfassend eine Reihe von Elektrolysezellen, darunter eine Elektrolysezelle (100) und mindestens eine Vorrichtung (1) zur Speicherung nach einem der Ansprüche 9 bis 13, und einen Betriebsgang (1001), der sich im Wesentlichen parallel zu der Reihe von Elektrolysezellen erstreckt.
  15. Elektrolyseanlage nach Anspruch 14, dadurch gekennzeichnet, dass die Abstützmittel Abstützoberflächen (22) umfassen, die dazu bestimmt sind, sich an einer Oberfläche eines Ganges (1002) zwischen Zellen abzustützen, die an einem Längsrand (114) der Elektrolysezelle (100) entlangführen, und die Elektrolysezelle (100) von einer angrenzenden Elektrolysezelle (101) trennen.
  16. Elektrolyseanlage nach Anspruch 14 oder 15, dadurch gekennzeichnet, dass die Abstützmittel zwischen sich einen Raum begrenzen, sodass sich die Elektrolysezelle (100) zwischen den Abstützmitteln der Vorrichtung (1) zur Speicherung erstreckt.
  17. Verfahren zum Tauschen eines gebrauchten Anodenkomplexes einer Elektrolysezelle (100) gegen einen neuen Anodenkomplex (106a), umfassend einen Schritt zum Anbringen einer Vorrichtung (1) zur Speicherung nach einem der Ansprüche 1 bis 6 über der Elektrolysezelle (100).
  18. Verfahren nach Anspruch 17, dadurch gekennzeichnet, dass der Schritt des Anbringens die Positionierung der Vorrichtung (1) zur Speicherung direkt auf Höhe eines oder mehrerer Anodenkomplexe (106) nahe dem gebrauchten Anodenkomplex (106b) umfasst.
  19. Verfahren nach Anspruch 17 oder 18, dadurch gekennzeichnet, dass das Verfahren anhand eines Systems zur Speicherung nach einem der Ansprüche 7 oder 8 umgesetzt wird, und das Verfahren einen Schritt der Positionierung der einen der Vorrichtungen (1) zur Speicherung des Systems zur Speicherung oberhalb einer an die Elektrolysezelle (100) angrenzenden Elektrolysezelle (101) umfasst, die den gebrauchten Anodenkomplex (106b) umfasst.
  20. Verfahren nach Anspruch 19, dadurch gekennzeichnet, dass das Verfahren die Schritte umfasst, die darin bestehen, ein Zugriffsfenster (124) zwischen den Abdeckungen (120) der Elektrolysezelle (100) vorzusehen, um den gebrauchten Anodenkomplex (106b) zu extrahieren und ihn durch einen neuen Anodenkomplex (106a) zu ersetzen, und die Vorrichtung (1) zur Speicherung gegenüber dem Zugriffsfenster anzuordnen.
  21. Verfahren nach einem der Ansprüche 17 bis 20, dadurch gekennzeichnet, dass das Verfahren einen Schritt umfasst, der darin besteht, ein Zugriffsfenster (124) zwischen den Abdeckungen (120) der Elektrolysezelle (100) vorzusehen, um den gebrauchten Anodenkomplex (106b) zu extrahieren und ihn durch einen neuen Anodenkomplex zu ersetzen, und dadurch, dass das Verfahren die Realisierung eines Tausches eines Anodenkomplexes anhand einer Elektrolyse-Servicemaschine umfasst, die sich nur zwischen den Querseiten (116) der Elektrolysezelle (100), den gebrauchten Anodenkomplex (106b) umfassend, fortbewegt und gegebenenfalls einer zur Elektrolysezelle (100) angrenzenden Elektrolysezelle (101), die den gebrauchten Anodenkomplex (106b) umfasst, während des gesamten Zeitraums im Laufe dessen das Zugriffsfenster (124) zwischen den Abdeckungen (120) der Elektrolysezelle (100) vorgesehen ist, um den gebrauchten Anodenkomplex (106b) zu extrahieren und ihn durch den neuen Anodenkomplex (106a) zu ersetzen.
EP15740471.6A 2014-01-27 2015-01-23 Vorrichtung zur speicherung einer last über einer elektrolysezelle Active EP3099843B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1400178A FR3016891B1 (fr) 2014-01-27 2014-01-27 Dispositif de stockage d'une charge au-dessus d'une cuve d'electrolyse.
PCT/IB2015/000069 WO2015110902A1 (fr) 2014-01-27 2015-01-23 Dispositif de stockage d'une charge au-dessus d'une cuve d'électrolyse

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EP3099843A1 EP3099843A1 (de) 2016-12-07
EP3099843A4 EP3099843A4 (de) 2017-11-08
EP3099843B1 true EP3099843B1 (de) 2020-05-27

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CN (1) CN105960482B (de)
AU (2) AU2015208856A1 (de)
CA (1) CA2935446C (de)
DK (1) DK179626B1 (de)
FR (1) FR3016891B1 (de)
RU (1) RU2686184C2 (de)
WO (1) WO2015110902A1 (de)

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CN107282483B (zh) * 2017-06-20 2022-09-27 沈阳中色碳素设备研发有限公司 一种自重清理阳极炭块表面生产线的自重清理方法

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SU407973A1 (ru) * 1972-02-21 1973-12-10 Машина для смены обожженных анодов алюминиевых электролизеров
IT1221994B (it) * 1987-07-09 1990-08-31 Techmo Car Spa Apparecchiatura per il cambio meccanizzato degli anodi nelle celle elettrolitiche per la produzione di alluminio
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Publication number Publication date
CN105960482B (zh) 2019-03-19
RU2016134826A (ru) 2018-03-02
AU2019202943A1 (en) 2019-05-16
AU2015208856A1 (en) 2016-07-28
DK201670542A1 (en) 2016-09-05
EP3099843A1 (de) 2016-12-07
FR3016891A1 (fr) 2015-07-31
RU2686184C2 (ru) 2019-04-24
CN105960482A (zh) 2016-09-21
WO2015110902A1 (fr) 2015-07-30
CA2935446C (fr) 2022-03-29
RU2016134826A3 (de) 2018-11-16
FR3016891B1 (fr) 2017-08-04
AU2019202943B2 (en) 2020-05-21
CA2935446A1 (fr) 2015-07-30
EP3099843A4 (de) 2017-11-08
DK179626B1 (en) 2019-03-05

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