EP3030696A1 - Electrolytic device and anode assembly intended for the production of aluminium, electrolytic cell and apparatus comprising such a device - Google Patents
Electrolytic device and anode assembly intended for the production of aluminium, electrolytic cell and apparatus comprising such a deviceInfo
- Publication number
- EP3030696A1 EP3030696A1 EP14834965.7A EP14834965A EP3030696A1 EP 3030696 A1 EP3030696 A1 EP 3030696A1 EP 14834965 A EP14834965 A EP 14834965A EP 3030696 A1 EP3030696 A1 EP 3030696A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- anode
- carrier
- receiver
- contact surface
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/10—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
- C25C3/16—Electric current supply devices, e.g. bus bars
Definitions
- the invention relates to the production of aluminum by igneous electrolysis.
- the invention relates more particularly to an electrolysis device associated with an electrolytic cell using at least one anode assembly moved vertically during electrolysis, and electrically powered by anode conductors.
- Aluminum metal is produced industrially by igneous electrolysis, namely by electrolysis of alumina in solution in a bath of molten cryolite, called electrolyte bath, according to the well known Hall Houult process.
- the electrolyte bath is contained in tanks, called “electrolysis cells", each tank comprising a steel box having an inner lining generally made from refractory and / or insulating materials.
- An electrolysis cell comprises cathode assemblies located at the bottom of the tank, each cathode assembly comprising a cathode of carbon material. Anodes are partially immersed in the electrolyte bath.
- the anodes are more particularly of the pre-baked anode type with carbonaceous anode blocks precooked, that is to say cooked before introduction into the electrolysis cell.
- the anode blocks are often suspended from an anode support to form with said blocks what is often called the anode assembly.
- the anode assembly is generally movable relative to the box and can move vertically using displacement means to compensate for the consumption of anode blocks during electrolysis and variations in the level of aluminum accumulating on the cathode.
- the electrolytic cell may generally receive a plurality of anode assemblies distributed along a longitudinal direction of the vessel and its vessel, the anode carrier of said anode assemblies extending along a transverse direction of the vessel and its vessel. .
- the assembly formed by an electrolytic cell, its anodes and the electrolyte bath is often called an electrolysis cell.
- An electrolysis installation may comprise a series of several tanks extending along the transverse direction of the tank and its caisson
- the anode assemblies and the cathode assemblies of an electrolytic cell are electrically connected by a network of electrical conductors.
- Cathode conductors are connected to the cathode sets to collect a current electrolysis at the cathode and to lead cathodic outputs through the bottom or sides of the box.
- the cathodic outputs are, for their part, electrically connected, via routing conductors, to anode conductors electrically feeding the anode assemblies of the next vessel. These routing conductors generally extend in a substantially horizontal direction.
- the anode conductors are, in turn, electrically connected to the anode assemblies of the next vessel.
- the electrolysis current is thus conveyed from the cathode of an electrolytic cell to the anode blocks of the following electrolytic cell, via cathode conductors, routing conductors, anode conductors and anodic support of anode assemblies.
- the anode assemblies can be displaced vertically using the displacement means, in order to compensate for the consumption of the anode blocks.
- the anode assemblies can also be moved vertically during anode change maneuvers by other means, such as handling tools. During these vertical displacements of the anode assemblies, the anode blocks are moved through an opening defined by the lining of the chamber of the electrolytic cell. The vertical displacements of the anode assemblies during the anode change maneuvers may be limited by the presence of electrolysis cell equipment arranged above this opening.
- the French patent published under the number 2,694,945 describes a tank superstructure comprising a rigid beam arranged above the electrolytic cell and extending in the longitudinal direction of the vessel of said vessel, the beam supporting a anodic frame to which are connected on the one hand current increases and on the other hand anode rods.
- the rigid beam of the superstructure also supports up-down anode mechanisms for vertically moving the anode frame and the anodes attached to said anode frame.
- Such an arrangement of the superstructure, the anode frame and the current surges above the electrolytic cell tends to reduce the available space above the vessel of said vessel, and to limit the vertical displacement of the anodes during anode change maneuvers.
- US Patent No. 3,575,827 discloses an electrolysis cell with an anode assembly comprising a metal plate surmounted by a gateway integral with said plate and an anode block suspended from said plate, said anode assembly being adjusted upward or downward to using cylinders fixed on the face outer walls of a box of said cell on which the anode assembly rests.
- a flexible conductor is used to bring the electrolysis current to a conductor integral with the anode assembly, the latter conductor being fixed on top of the metal plate to which is suspended the anode block. It follows that, during the anode change maneuvers, the disassembly of the anode assembly seems to require first of all disconnecting the flexible conductor from the anode assembly, and in a second time to separate the anode assembly cylinders. In the same way, the mounting of the anode assembly seems to be done in two steps, by first joining the anode assembly to the cylinders and then connecting the flexible conductor to the anode assembly.
- the disconnection of the flexible conductor may leave the end of this conductor in the passage of the anode block or anode assembly, which may lead to mechanical interactions with said conductor and lead to wear or damage.
- the disconnected end of the flexible conductor may come into contact with the electrolyte inside the cell. electrolysis, which could lead to damage to said conductor or other problems related to the operation of said vessel.
- the present invention relates to an electrolysis device associated with an electrolytic cell to facilitate anode switching maneuvers and to promote the accessibility of handling and intervention tools in the electrolysis cell.
- the invention also aims to allow the anode change maneuvers without stopping the production of aluminum in the tank.
- the invention also aims to limit the wear and damage of anode conductors during anode change maneuvers.
- the invention relates to an electrolysis device for the production of aluminum comprising a box having an inner lining defining an opening through which is intended to be displaced at least one anode block, said at least one anode block being suspended from an anode carrier forming with said at least one anode block an anode assembly movable relative to the box, said device further comprising displacement means comprising at least one anode receiver for cooperating with said anode carrier to move the anode assembly in accordance with a substantially vertical direction, said anode carrier being intended to be connected to anode conductors for supplying an electrolysis current to said at least one anode block, said electrolysis device being characterized in that said at least one anode receiver is disposed outside a space defined by the top of said at least one anode block during its movement through the opening, said at least one anode receiver having a contact surface cooperating with a corresponding anode contact surface of the anode carrier to establish with said anode carrier, an electrical contact for conducting the electrolysis current between
- said at least one anode receiver is disposed outside a space defined by the top of the at least one anode block during its movement through the opening.
- said at least one anode receiver is not disposed at the right of the at least one anode block during its movement through the opening, or said at least one anode receiver is disposed outside a projection vertical translation path of the at least one anode block during its movement through the opening.
- the invention thus facilitates anode change maneuvers, and promote the accessibility of handling and intervention tools in the electrolysis cell.
- the invention also makes it possible to limit wear and damage of the anode conductors during anode change maneuvers.
- the invention also makes it possible to carry out the anode change maneuvers without stopping the production of aluminum in the electrolytic cell.
- the electrolysis device according to the invention is intended to receive several anode assemblies distributed along a longitudinal direction of the box, the anode support of said anode assemblies extending along a transverse direction of said box, said device further comprising compensating means cooperating with the displacement means for absorbing the expansion of said anode carrier along the transverse direction and / or the longitudinal direction.
- the anode support of said assembly rises in temperature, which causes an expansion of said support which is particularly important in the transverse direction.
- This expansion has the effect of generating mechanical stresses on the anode receiver of the displacement means, which can lead to blockage or damage to these displacement means.
- These mechanical stresses can not only deform the receiver but also the anode assembly and thus generate flatness defects and therefore electric contact.
- the compensation means make it possible to tolerate any unevenness in order to ensure good electrical contact by allowing a certain range of deformation, which makes it possible to release the mechanical stresses associated with the thermal expansion or the eventual torsion of the anodic support during of his handling.
- compensation means cooperating with the moving means is meant that there is established between the compensation means and the moving means at least one functional cooperation, but not necessarily a physical cooperation, that is to say that the compensation means act directly or indirectly on the displacement means.
- the compensation means may interact directly with or be integrated in the displacement means, in particular the anode receiver of said moving means.
- the compensation means may have no interactions directly with the displacement means, for example by being integrated in the anode carrier of the anode assembly.
- the contact surface of the at least one anode receiver is arranged above the at least one anode receiver to support the anode assembly. In this way, the electrical contact between the anode receiver and the anode carrier is improved.
- the at least one anode receiver comprises a drive portion guided in translation in the substantially vertical direction and a conductive portion of electricity.
- the driving part can be made of steel.
- the driving part cooperates with motor means and guide means.
- the conductive part may, in turn, be made of copper. This configuration makes it possible in particular to limit the electrical resistance.
- the contact surface of the at least one anode receiver is arranged on the conductive portion of said anode receiver.
- the decoupling between the displacement function and the conduction function of electricity is carried out on a major part of the anode receiver, but not on the whole of said anode receiver. Indeed, it is only at the level of the contact surface of the anode receiver, the conductive portion alone ensures the dual function of displacement and conduction of electricity.
- the contact surface is substantially horizontal, the compensation means being essentially formed by said contact surface and the anodic contact surface of the anode support cooperating with said contact surface, the expansion of the support anodic along the transverse direction being slidably absorbed from said anode contact surface on said contact surface in the transverse direction and / or in the longitudinal direction of said support surface.
- the contact surface of the at least one anode receiver and the corresponding anode contact surface of the anode carrier generally have complementary shapes.
- the contact surface of the at least one anode receiver and the corresponding anode contact surface of the anode carrier are flat and horizontal.
- the contact surface of the at least one anode receiver and the corresponding anode contact surface of the anode support may have various shapes, in particular to maximize the extent of these surfaces and thus to promote the electrical conductivity between the anode receiver and the support anodic.
- the contact surface of the at least one anode receiver may comprise a trough or groove passing through the whole of said contact surface and whose main axis extends parallel to the transverse direction of the box.
- This embodiment makes it possible to promote the sliding of the anodic contact surface of the anode support on the corresponding contact surface of the anode receiver in the transverse direction of the box.
- the corresponding anode contact surface has an oblong projecting portion intended to cooperate with the chute.
- the chute and the corresponding oblong protruding portion have a transverse profile in the form of an arc of a circle, for example a half-circle.
- the main directions of the chute and the corresponding oblong projection part may be oriented in the transverse box direction for the contact surfaces on a longitudinal edge of the box and oriented in the longitudinal direction for the surfaces on the other longitudinal edge of the box.
- the sliding of the anode contact surface of the anode support on the contact surface is facilitated by the use of an electrically conductive grease applied to one of said surfaces.
- the compensation means are arranged in said at least one anode receiver.
- the anode support can then be advantageously fixed on the anode receiver so that the anodic contact surface of the anode carrier is in compression against the contact surface of the anode receiver, without risking deterioration of the displacement means.
- the compensation means are arranged between an upper part of the at least one anode receiver carrying the contact surface and the driving part.
- the compensating means comprise at least one connecting element between the upper part and the driving part making it possible to absorb the expansion of the said anodic support along the transverse direction or the longitudinal direction, such that an connecting element of the connecting rod type.
- the displacement means are equipped with at least two anode receivers per anode assembly, disposed on either side of the box relative to the transverse direction, a first connecting element of one of the anode receivers allowing absorbing any expansion of said anode support along the transverse direction, and a second connecting member of the other anode receiver for absorbing any expansion of said anode carrier along the longitudinal direction.
- the compensation means comprise at least one connecting element between the upper part and the drive part for absorbing the expansion of said anodic support along the transverse direction and the longitudinal direction, such as a ball-type connecting element.
- the driving part of the anode receiver comprises a lifting mat driven in translation and a soleplate connected to said lifting mat via the connecting element, the conductive part comprising at least one lateral conductor and a conductive plate disposed on said soleplate electrically connected to said lateral conductor.
- the driving portion comprises a strapping surrounding the conductive portion of the electricity with sufficient clearance to allow said conductive portion to deform within said strapping and to absorb thus dilating the anodic support along the transverse direction and / or the longitudinal direction.
- the displacement means are equipped with at least two anode receivers per anode assembly, said anode receptors being respectively arranged along each longitudinal wall of the box, outside said box.
- the at least two anode receivers per anode assembly are associated with separate drive means.
- the electrolysis device comprises guide means arranged along the longitudinal walls of the box, outside said box, said guide means being arranged in a welded structure forming said box.
- the opening delimited by the inner lining of the box and the anode assembly is covered by a removable cover.
- the compensation means are arranged in the anode carrier.
- the invention also relates to an anode assembly intended to be installed in an electrolysis device for the production of aluminum, said anode assembly comprising an anode support and at least one anode block suspended from said anodic support, said anode carrier being intended for being connected to anode conductors for supplying an electrolysis current to said at least one anode block, said at least one anode block being intended to be displaced in a substantially vertical direction through an opening delimited by a box and its inner coating of said electrolysis device using at least one anode receiver means for moving said electrolysis device cooperating with said anode support, said anode assembly being characterized in that the anode carrier comprises at least one surface anode contact cooperating with a corresponding contact surface of said at least one recce anode detector for establishing with said at least one anode receiver, an electrical contact for conducting the electrolysis current between said at least one anode receiver and the anode assembly, and a mechanical contact for moving said anode assembly in the substantially vertical direction, the at least one
- the at least one anode contact surface of the anode support is disposed outside a space defined by the top of said at least one anode block.
- the at least one anode contact surface is not arranged at the right of the at least one anode block.
- such a configuration makes it possible in particular to receive the anode assemblies on anode receivers of the electrolysis device which are arranged outside the vertical translation path of the anode blocks.
- the anode support of the anode assembly extends along a main direction corresponding to a transverse direction of the box when the anode assembly is received in the electrolysis device, and said anode carrier comprises means of compensation for absorbing the expansion of said anode carrier along said main direction and / or a secondary direction of said anode carrier corresponding to a longitudinal direction of said well when the anode assembly is installed in said electrolysis device.
- the compensation means make it possible to correct any unevenness in order to ensure good electrical contact and to overcome any thermal expansion or torsion of the anodic support.
- the anode carrier comprises an armature, supporting the at least one anode block, and an electrically conductive portion, the at least one anode contact surface of said anode carrier being arranged in said conductive portion.
- the anode support compensation means comprise at least one connecting element, such as a connecting rod-type connecting element or a sliding-type connecting element, disposed between the at least one anode contact surface. and a major portion of the frame, for absorbing any expansion of said anode carrier along the main direction or the secondary direction.
- a connecting element such as a connecting rod-type connecting element or a sliding-type connecting element
- the anodic support comprises two anode contact surfaces disposed on each side of said anode support with respect to the main direction, a first connecting element disposed between one of the anodic contact surfaces and the main part of the reinforcement enabling absorbing any expansion of said anode carrier along the main direction and a second connecting member disposed between the other anode contact surface and the major portion of the frame for absorbing any expansion of said anode carrier along the secondary direction.
- At least one connecting element makes it possible to absorb the expansion of the anodic support along the main direction and the secondary direction, such as a ball-type connection element.
- the invention also relates to an electrolysis cell, said cell being characterized in that it comprises an electrolysis device as described above, said electrolysis cell comprising, in addition, an electrolysis cell formed by the casing and the inner lining of said electrolysis device, an electrolyte bath contained in said vessel and at least one anode assembly comprising at least one anode block partially immersed in said electrolyte bath.
- Figure 1 shows in section, two adjacent electrolysis cells according to the invention, according to a cross section A-A of Figure 2 described below.
- FIG. 2 represents in section, one of the electrolysis cells of FIG. 1, along a longitudinal section B-B.
- Figure 3 shows a side view of the same electrolysis cell of Figure 1, along a plane defined by a longitudinal section C-C.
- FIG. 4 is a sectional view of two adjacent electrolysis cells according to another embodiment of the invention.
- FIG. 5 represents in section, for one of the electrolysis cells of FIG. 4, an anode receiver of the displacement means comprising a connecting rod-type connecting element and a jack cooperating with said anode receiver.
- FIG. 6 represents, in section, the anodic receptor of FIG. 5, along a longitudinal section D-D.
- FIG. 7 represents in section, for one of the electrolysis cells of FIG. 4, an anode receiver of the displacement means comprising a ball-type connection element and a jack cooperating with said anode receiver.
- FIG. 8 represents, in section, the anode receiver of FIG. 7, along a longitudinal section E-E.
- FIG. 9 shows in section, two adjacent electrolysis cells according to yet another embodiment of the invention.
- FIG. 10 represents, in section, an anode receiver means for moving the anode assembly of one of the electrolysis cells of FIG. 9 and a jack cooperating with said anode receiver.
- Figure 1 1 shows in section, the anode receiver of Figure 10, according to a longitudinal section F-F.
- Figure 12 shows in section, the anode receiver of Figure 10, according to a longitudinal section G-G.
- FIG. 14 represents, in section, the anodic support of FIG. 13, along a longitudinal section 11.
- FIG. 15 represents in section, a part of the anode support and compensation means of FIG. 13, along a longitudinal section K-K.
- Figure 16 shows in section, an anode assembly according to another embodiment.
- Figure 17 shows in section, the anode carrier of Figure 16, according to a longitudinal section L-L.
- Figure 18 shows in section, a portion of the anode carrier and the compensation means of Figure 16, according to a longitudinal section N-N.
- FIG. 1 shows two adjacent electrolysis cells 1 intended for the production of aluminum by electrolysis, each of said tanks being associated with an electrolysis device 1 according to a first embodiment of the invention.
- FIG. 1 The description below is made with respect to a Cartesian reference system, represented in FIG. 1, which is linked to each electrolysis cell 1, the X axis being oriented in a transverse direction of the electrolysis cells, the axis Y being oriented in a longitudinal direction of the electrolytic cells, and the Z axis is oriented in a vertical direction of the electrolysis cells.
- the orientations, directions, plans and longitudinal, transverse, vertical displacements are thus defined with respect to this reference frame.
- the electrolysis vessel 1 is arranged perpendicularly to the length of a row of electrolysis cells to which it belongs. Thus, it extends in length in the longitudinal direction Y, while the row of electrolysis cells extends in length in the transverse direction X.
- Each of the electrolysis tanks 1 comprises a box 3, which may be metallic, for example steel, and an inner liner 5, typically made of refractory materials.
- the box 3 is usually equipped with cradles reinforcements.
- Each of the electrolysis tanks 1 comprises at least one cathode assembly disposed at the bottom of the box 3, each cathode assembly comprising at least one cathode 7, which can be formed of several cathodic blocks made of carbonaceous material, as well as cathode conductors 9 intended to collect the electrolysis current to lead it to cathode outlets 1 1 passing through the caisson 3.
- Each of the electrolysis tanks 1 also comprises anode assemblies 12 comprising an anode carrier 13 and at least one anode block 15 or supported anode by the anodic support 13.
- the anodic support 13 comprises a support bar 17 which can extend substantially horizontally between two opposite longitudinal edges of the electrolytic cell and the rods 19.
- the anode block 15 is hooked to the anodic support 13 by means of logs 19 sealed with cast iron in holes provided for this purpose in the anode block 15.
- the anode block 15 may be of carbon material.
- the anode block 15 is often of precooked type. In operation, the anode block 15 is immersed in an electrolytic bath 21 contained in each electrolysis tank 1 to be consumed.
- each of the electrolysis tanks 1 comprises displacement means 23 for translating vertically downward the anode assemblies 12. In this way, the anode blocks 15 are lowered, as and when of their consumption, through an opening 16 delimited by the box 3 and its lining 5.
- the displacement means 23 comprise, for each electrolytic cell 1, at least two anode receivers 25 intended to cooperate with the anode carrier 13, 17 to drive the anode assembly 12.
- the anode receivers 25 can be actuated by cylinders 39 More specifically, each anode receiver 25 has a contact surface 27 cooperating with an anode contact surface 29 of the anode support 13, 17 to establish with said anodic support a mechanical contact for vertically driving the anode assembly 12.
- the contact surface 27 of the anode receptors 25 is arranged above said anode receptors, so that the anode assembly is supported on these anode receptors. Therefore, it is not necessary to have fixing means for fixing the anode carrier 13, 17 on the anode receivers 25. As explained below, the absence of fixing means makes it possible to compensate the transverse or longitudinal dilations of the anodic support 13, 17.
- the anode assemblies and cathode assemblies of each electrolytic cell are electrically powered by a network of electrical conductors.
- the cathode outlets 1 1 of the electrolysis tanks 1 are connected to routing conductors 31 to conduct the electrolysis current collected by the cathode conductors 9 to anode conductors electrically supplying the anode blocks 15 of the reactor vessel. next electrolysis.
- These routing conductors 31 generally extend in a substantially horizontal direction.
- the anode conductors are, in turn, electrically connected between the routing conductors 31 and the anode assemblies 12.
- Anode conductors are intended to conduct the electrolysis current to the anode assemblies 12 and comprise flexible electrical conductors 33 to adapt, by their flexibility, to the displacement in vertical translation of the anode assemblies 12 and thus to maintain the electrical connection during the displacement of the anode assemblies 12.
- the flexible electrical conductors 33 may be formed by a superposition of electrically conductive flexible sheets.
- the cathode conductors 9, the cathode outlets 11 and the routing conductors 31 may be formed by metal bars, for example aluminum, copper or steel.
- the contact surface 27 of each anode receiver 25 makes it possible to establish with the anode carrier 13, 17, not only a mechanical contact for vertically moving the anode assembly 12, but also a contact electrical conductor for conducting the electrolysis current between each anode receiver and said anode carrier.
- each anode receiver 25 has a drive portion 35 which is guided in vertical translation and a conductive portion of the electricity.
- the driving part 35 which is often made of steel, is driven by the cylinders 39 and guided in vertical translation by guide means 51 which can be formed against the box and the upper part of the box and, where appropriate, by a part of a superstructure of the tank.
- the conductive portion may, in turn, be formed by rigid electrical conductors, non-deformable, for example, formed by a metal bar, in particular steel, copper, aluminum or steel / copper composite.
- the conductive part is part of the anode conductors described above, and thus enables the electrolysis current to be led to an anode assembly 12.
- the conductive portion is electrically connected between, on one side, the flexible electrical conductors 33. and on the other side, the anodic contact surface 29 of the anode carrier 13, 17.
- FIG. 1 only the upper end of the conductive portion 37 has been shown, i.e., the portion of the anodic receiver 25 carrying the contact surface 27.
- the transport of the electrolysis current in the anode carrier 13, 17, between the anodic contact surface 29 of said support and the anode blocks 15, is done using electrical conductors 40 , represented in black, integrated in said anodic support.
- the transport of the electrolysis current in the anode carrier 13, 17 is also done using the rods 19.
- the contact surfaces 27 of the anode receivers 25 being arranged to support the anode assembly 12, the weight of this Anodic assembly thus makes it possible to reinforce the electrical contact between the anode receiver and the anode support. It follows that the conduction of the electrolysis current is improved.
- the anode receivers 25 of the displacement means 23 are arranged outside a space defined by the top of the anode blocks 15 during their displacement through the opening 16. vertical members of the anode assembly 12, whether through the displacement means 23 to compensate for the consumption of the anode blocks 15, or whether it is with the aid of handling tools in the operations of change of anode, the anode receivers 25 are not on the vertical translation path of the anode blocks 15.
- the anode conductors are also arranged outside the space defined by the top of the anode blocks 15 during their displacement to 16.
- the end of the anode conductors, which are in contact with the anode carrier 13, 17, is included in the conductive portion 37 of the anode receivers 25, this the latter being itself outside the space defined by the top of the anode blocks 15. It follows that the anode change maneuvers are facilitated. This configuration also makes it possible not to hinder the accessibility of the intervention tools in the electrolytic cell. With the exception of a removable cover described below, no equipment is disposed above the opening 16 which could impede accessibility in each electrolysis tank 1.
- compensation means cooperating, at least functionally, with the displacement means are often necessary to absorb the expansion of the anodic support 13, 17.
- the contact surface 27 of the anode receiver 25 is flat and horizontal, which makes it possible to absorb any expansion of the anodic support 13, 17 by sliding of the anodic contact surface 29 of this anodic support on said contact surface of the anode receiver.
- the compensation means are essentially formed by the contact surface 27 of the anode receiver 25 and the anodic contact surface 29 of the anode carrier 13, 17. This sliding of the contact surface Anode 29 of the anode carrier 13, 17 on the contact surface 27 may be facilitated by the use of an electrically conductive grease applied to one of said surfaces.
- Each of the electrolysis tanks 1 comprises a containment chamber 41 for confining the gases generated during the electrolysis reaction.
- This containment enclosure delimits a closed volume above the opening 16 through which the anode assembly 12 is moved vertically.
- the anode assemblies 12 are integrally contained in the confinement enclosure 41.
- This confinement enclosure is formed, at least in part, by the caisson 3 and by a removable cover 43.
- the containment enclosure 41 may comprise a superstructure receiving the removable cover 43 and disposed above the box 3. In the embodiment shown, the removable cover 43 rests on a fixed part 45 of a superstructure or an extension of the box 3.
- the removable cover 43 allows to extract and introduce anode assemblies 12, from above, in each electrolysis tank 1, with the aid of handling tools. It also facilitates any intervention in the electrolysis cell 1.
- the anode receivers 25 of the displacement means 23 are partially in the confinement enclosure 41.
- An upper part of the anode receptors 25 carrying the contact surface 27 is disposed inside the confinement enclosure 41.
- the flexible electrical conductors 33 and the cylinders 39 are arranged outside the the confinement chamber 41.
- the upper part of the anode receptors 25 carrying the contact surfaces 27 extends inside the confinement enclosure 41, so that the electrical connection with the anode support 13, 17 is realized inside the containment enclosure 41.
- the anode assembly 12 is free of any interaction with the box 3, the removable cover 43, and where appropriate the superstructure which form the confinement enclosure 41. In this way, the confinement enclosure 41 is not likely to be affected, either by the replacement of the anode assembly or by the displacement of the anode assembly towards the down as consumption of the anodic blocks 15.
- each electrolysis vessel 1 comprises gaskets. sealing 47 interposed between the removable cover 43 and the fixed portion 45 on which said removable cover 43 rests.
- FIGS. 2 and 3 show that the removable cover 43 may comprise a plurality of substantially longitudinal and parallel mutually adjacent covers 53 extending in a substantially transverse direction X between two opposite longitudinal edges of each electrolysis vessel 1
- the compensation means are arranged in the anode receivers 125, 126 displacement means 123 associated with each electrolytic tank 101, that is to say more precisely between the upper part of the anode receivers 125, 126 carrying the contact surfaces 127, 128 and the drive portion 135, 136 of these same anodic receivers guided in vertical translation.
- the compensation means comprise connecting elements 161 arranged in the anode receivers 125 arranged to the left of each electrolytic cell and connecting elements 171 of another type arranged in the anode receivers 126 arranged to the right of each tank of Electrolysis 101.
- the connecting elements 161 are of the connecting rod type, while the connecting elements 171 are of the ball-and-socket type.
- the connecting elements 161, 171 of the compensation means are arranged between the upper part and the drive part 135, 136 of the anode receivers 125, 126.
- the anode support 13, 17 of the anode assemblies 12 shown in FIG. 4 is fixed on the anode receivers 125, 126 by means of fastening means comprising two complementary threads, the cooperation of which allows the attachment of the anode carrier 13, 17 by simple screwing with the screws 181.
- the fastening means could include any type of connector, for example screw, performing a plating and compression of the anode carrier 13, 17 against the anode receivers 125, 126.
- the driving portion 135 comprises a hoisting mat 163 driven in vertical translation by the cylinder 39.
- the driving part also comprises a steel soleplate 165 connected to the lifting mat 163 via the connecting element 161 of the connecting rod type.
- the conductive portion 137 comprises, in turn, two rigid lateral conductors 167 which are connected in their lower part to the flexible conductors 33 shown in FIG. 4.
- the conductive portion 137 further comprises a conductive soleplate 169 made of copper disposed on the sole 165 and electrically connected to the two lateral conductors 167.
- the lateral conductors 167 are mechanically fixed to the sole 165 of steel and welded to the conductive soleplate 169.
- the driving portion 136 comprises a lifting mat 173 driven in vertical translation by the jack 39.
- the driving portion also comprises a steel soleplate 175 connected to the lifting mat 173 via the connecting element 171.
- the conductive portion 138 comprises, in turn, two rigid lateral conductors 177 which are connected in their lower part to the flexible conductors 33 shown in Figure 4.
- the conductive portion 138 further comprises a conductive plate 179 of copper which is disposed on the soleplate 175 and which is electrically connected to the two lateral conductors 177.
- the lateral conductors 177 are mechanically fixed to the sole 175 of steel and welded to the conductive sole 179.
- connection elements of the connecting rod type 161 and the ball joint type 171 thus make it possible to absorb any expansion of the anode supports 13, 17.
- the linking element 161 of the connecting rod type is mounted with its axes of rotation oriented along the longitudinal direction Y, this makes it possible to absorb any expansion of the anode support 13, 17 along the transverse direction. If the axes of rotation of the connecting rod-type connecting member had been oriented in the transverse direction X, the compensation would be applied to absorb any expansion of the anodic support along the longitudinal direction.
- the connecting element 171 of the ball-type makes it possible for it to absorb any expansion of the anodic support 13, 17 along the transverse direction and the longitudinal direction.
- the displacement means are equipped with at least two anode receivers per anode assembly, disposed on either side of the box with respect to the transverse direction, a first connecting element of the connecting rod type being mounted on one of the anode receivers so as to absorb any expansion of said anode carrier along the transverse direction, and a second connecting rod-type member being mounted on the other anode receiver so as to absorb any expansion of said anode carrier along the longitudinal direction.
- each anode assembly it is also possible to envisage having at least one connecting element arranged on at least one anode receiver disposed on one side of the chamber of the electrolysis cell.
- the compensation means are, as in the embodiment of FIG. 4, arranged in the anode receivers with displacement means associated with each tank of electrolysis 201.
- the anode carrier 13, 17 of the anode assemblies 12 shown in FIG. 9 is fastened to the anode receptors 225 by means of fastening means comprising two complementary threads whose cooperation allows the fixing the anode support 13, 17 by simply screwing with the screws 281.
- the driving portion 235 of the anode receiver 225 comprises a strapping 283 or casing surrounding the conducting portion of this same anode receiver. Strapping 283 is rigid steel and constitutes the bulk of the drive portion 235 of the anode receiver 225. The strapping is driven in vertical translation through the cylinder 39.
- a clearance is left between the conductive portion 237 and the strapping 283, so that said conductive portion can move to resume thermal expansion or other unevenness of the anode carrier 13, 17.
- a sliding pivot 285 is arranged in the lower part of the anode receiver 225 to support the conductive portion 237.
- the sliding pivot 285 could also be arranged perpendicularly to that shown in Figures 10 and 1 1, for example on the anode receiver 225 supporting the same anode assembly and disposed of the other side of the box.
- the compensation means may also be arranged in the anode carrier of the anode assembly.
- Anode assemblies 301, 401 incorporating such anode carriers have been shown, by way of example, in FIGS. 13 to 18.
- the anode carrier 303, 403 of the anode assemblies 301, 401 extend along a main direction corresponding to the transverse direction X when the anode assembly is installed in the electrolysis device.
- a Cartesian coordinate system has been shown in FIGS. 13 and 16, as an indication, to show the positioning of these anode assemblies with respect to the electrolysis cells.
- the expansion of the anode carriers 303, 403 is essentially along the main direction. The expansion is, to a lesser extent, along a secondary direction of the anode carriers 303, 403 corresponding to the longitudinal direction Y when the anode assembly is installed in the electrolysis device.
- the anode carriers 303, 403 of the anode assemblies 301, 401 comprise reinforcements 305, 405 supporting a plurality of anode blocks 307, 407 by means of logs 309, 409.
- the anode carriers 303, 403 also comprise a conductive portion 31 1, 41 1 formed by flexible electrical conductors.
- Each of the anode carriers 303, 403 has two anode contact surfaces in the form of flanges 313, 413 for cooperating with corresponding contact surfaces of the anode receivers to establish electrical contact and mechanical contact.
- the anode contact surfaces 313, 413 are arranged outside a space defined by the top of the anode blocks 307, 407, which makes it possible to support these anode assemblies on anode receivers of an electrolysis device which are arranged in anode. outside the vertical translation path of the blocks anodic.
- the anodic contact surfaces 313, 413 are arranged in the conductive portions 31 1, 41 1 and consist essentially of copper flanges of said conductive portions.
- the reinforcements 305, 405 comprise beams whose profile has a shape and a dimensioning making it possible to reduce the bending of said beams under the weight of the anode blocks.
- the conductive portions 31 1, 41 1 may be formed by plates or copper strips which are not mechanically bonded continuously with the reinforcements 305, 405 of the anode carrier. As can be seen in FIGS. 13 and 16, the conductive portions 31 1, 41 1 are more particularly bonded to the reinforcements 305, 405 only at the level of the anode contact surfaces 313, 413 and the logs 309, 409. The conductive portions 31 1, 41 1 can be deformed slightly on the non-armature sections 305, 405 so as to absorb any thermal expansion of the anode carrier 303, 403.
- the compensation means of the anodic support 301 comprise a connecting rod-type connecting element 321 disposed between the anode contact surface 313 to the right of the anode assembly 301 and a main part of the 305.
- the means for compensation of the anode carrier 303 comprise another ball-type connecting element 322 disposed between the anode contact surface 313 to the left of the anode assembly and a main portion of the frame 305. More specifically, the connecting elements 321, 322 are arranged between the beam of the armature 305 and steel soles 325 supporting the copper soles forming the anode contact surfaces 313.
- the link member 321 of the connecting rod type is mounted with its axes of rotation oriented in the secondary direction Y, which makes it possible to absorb any expansion of the anode carrier 303 along the main direction X.
- the connecting element of the type connecting rod can be called a connecting rod of the longitudinal thermal expansion of the beam constituting the anodic support. If the axes of rotation of the connecting rod-type element had been oriented in the main direction X, the compensation would be applied to absorb any expansion of the anode support along the secondary direction Y.
- the connecting element 322 of the type The ball joint makes it possible to absorb any expansion of the anodic support along the transverse direction and the longitudinal direction.
- the ball-type connecting element may be called a ball of catch of the torsional defects of the beam constituting the anodic support.
- the compensation means of the anodic support 301 comprise two sliding-type connection elements 421 or of slide-type type, each of said connecting elements being disposed between one or other of the anode contact surfaces 413 of the anode assembly and a main portion of the frame 405. More specifically, the connecting elements 421 are arranged between the beam of the armature 405 and steel soles 425 supporting the copper soles forming the anode contact surfaces 413.
- the sliding type connecting elements 421 are formed on one side by the beam of the armature 405 whose profile forms a slide, and on the other side by slidably mounted slides in the slideway, each of said sliders carrying the copper soleplate of each anode contact surface 413.
- the connecting element 421 thus allows to absorb any expansion of the anode carrier 403 along the main direction X.
- the sliding type connecting elements 421 may further allow a slight rotation or pivot of the flanges 425 about a parallel axis aligns with the main direction X, because of the substantially cylindrical shape of the sliders.
- the connecting element 421 thus makes it possible to absorb any expansion of the anode support 403 along the secondary direction Y.
- the compensation means of the anode assembly could comprise a single connecting element on one side or the other of the anode carrier.
- the connecting means could also comprise a connecting element of the ball or pivot type on one of the sides of the anode support and a sliding type of connecting element on the other side of said anode support.
- An advantage of the present invention is to facilitate the access of the handling and intervention tools in the box, especially for the anode change maneuvers, by proposing a configuration in which the space above the opening delimited by the inner lining of the box is cleared.
- Another advantage of the present invention is to facilitate assembly and disassembly of the anode assembly.
- Yet another advantage of the present invention is to limit the mechanical interactions with the anode conductors during the anode changing operations, which makes it possible to reduce their wear and to avoid their damage.
- Yet another advantage of the present invention is to allow the anode change maneuvers to be carried out without stopping the production of aluminum in the tank.
- An advantage of a preferred embodiment of the present invention is to allow any dilation of the anode support to be absorbed, in particular during anode change operations, without affecting the operation of the means for moving the anode assembly.
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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)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1301910A FR3009564A1 (en) | 2013-08-09 | 2013-08-09 | ALUMINUM COMPRISING AN ELECTRIC COMPENSATION CIRCUIT |
FR1400175A FR3016900B1 (en) | 2014-01-27 | 2014-01-27 | ELECTROLYSIS DEVICE AND ANODE ASSEMBLY FOR THE PRODUCTION OF ALUMINUM, ELECTROLYSIS CELL AND INSTALLATION COMPRISING SUCH A DEVICE. |
PCT/CA2014/050720 WO2015017922A1 (en) | 2013-08-09 | 2014-07-30 | Electrolytic device and anode assembly intended for the production of aluminium, electrolytic cell and apparatus comprising such a device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3030696A1 true EP3030696A1 (en) | 2016-06-15 |
EP3030696A4 EP3030696A4 (en) | 2017-03-29 |
EP3030696B1 EP3030696B1 (en) | 2020-04-29 |
Family
ID=52460449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14834965.7A Active EP3030696B1 (en) | 2013-08-09 | 2014-07-30 | Electrolytic device and anode assembly intended for the production of aluminium, electrolytic cell and apparatus comprising such a device |
Country Status (9)
Country | Link |
---|---|
US (1) | US10151038B2 (en) |
EP (1) | EP3030696B1 (en) |
CN (1) | CN105917028B (en) |
AU (1) | AU2014305611B2 (en) |
BR (1) | BR112016001955B1 (en) |
CA (1) | CA2919331C (en) |
DK (1) | DK179903B1 (en) |
EA (1) | EA029616B1 (en) |
WO (1) | WO2015017922A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110029366A (en) * | 2019-04-22 | 2019-07-19 | 贵州铝城铝业原材料研究发展有限公司 | A kind of mechanical steel pawl insulation construction of aluminium electroloysis continuous prebaked anode cell |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3012389B1 (en) | 2013-10-25 | 2015-10-30 | Rio Tinto Alcan Int Ltd | SYSTEM FOR MANAGING LOGISTIC FLOW OF AN ELECTROLYSIS FACTORY, ALUMINUM COMPRISING THIS SYSTEM, VEHICLE FOR IMPLEMENTING SAID SYSTEM AND METHOD FOR IMPLANTING IT IN AN ELECTROLYSIS FACTORY |
FR3016896B1 (en) * | 2014-01-27 | 2016-01-15 | Rio Tinto Alcan Int Ltd | ELECTROLYTIC TANK HOUSING. |
FR3016895B1 (en) * | 2014-01-27 | 2017-09-08 | Rio Tinto Alcan Int Ltd | DEVICE FOR LIFTING ANODIC ASSEMBLIES OF AN ELECTROLYSIS TANK. |
FR3016894B1 (en) * | 2014-01-27 | 2017-09-01 | Rio Tinto Alcan Int Ltd | ELECTROLYSIS TANK HAVING AN ANODIC ASSEMBLY CONTAINED IN A CONFINEMENT ENCLOSURE |
FR3032460B1 (en) * | 2015-02-09 | 2017-01-27 | Rio Tinto Alcan Int Ltd | ELECTROLYSIS TANK |
CN108166017A (en) * | 2016-12-07 | 2018-06-15 | 高德金 | A kind of pre-calcining electrolytic cell production technology |
FR3090699B1 (en) * | 2018-12-20 | 2021-04-09 | Rio Tinto Alcan Int Ltd | Anode assembly and associated manufacturing process |
FR3100938B1 (en) * | 2019-09-17 | 2023-03-03 | A M C | Supply circuit for an electrolysis cell comprising a short-circuiting device and a disconnector |
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US3434955A (en) * | 1965-05-26 | 1969-03-25 | Pechiney Prod Chimiques Sa | Lifting beam for electrolysis cells |
US3634224A (en) * | 1968-06-07 | 1972-01-11 | Montedison Spa | Apparatus for supporting electrodes particularly suited for suspended electrodes used in multicell furnaces for the production of aluminum |
FR2694945A1 (en) * | 1992-08-20 | 1994-02-25 | Pechiney Aluminium | Very high intensity electrolytic cell superstructure for aluminum production. |
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US3575827A (en) * | 1967-12-06 | 1971-04-20 | Arthur F Johnson | System for reduction of aluminum |
US3607685A (en) * | 1968-08-21 | 1971-09-21 | Arthur F Johnson | Aluminum reduction cell and system for energy conservation therein |
US5876585A (en) * | 1996-05-29 | 1999-03-02 | Schenk; Rodney J. | Anode clamp |
JP2008533309A (en) * | 2005-03-24 | 2008-08-21 | ビーエイチピー ビリトン イノベーション ピーティーワイ エルティーディー | Anode support device |
CN101768761B (en) * | 2009-01-07 | 2012-05-23 | 沈阳城顺达工业技术有限公司 | Lifting gear for electrolytic bath anode and method thereof |
CN201473606U (en) * | 2009-05-25 | 2010-05-19 | 高德金 | Clamping type anode conducting device |
CN201634781U (en) * | 2009-05-25 | 2010-11-17 | 高德金 | Clamping type anode electric-conduction device |
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2014
- 2014-07-30 EA EA201690341A patent/EA029616B1/en not_active IP Right Cessation
- 2014-07-30 CN CN201480044315.4A patent/CN105917028B/en active Active
- 2014-07-30 DK DKPA201670129A patent/DK179903B1/en active IP Right Grant
- 2014-07-30 US US14/911,144 patent/US10151038B2/en not_active Expired - Fee Related
- 2014-07-30 EP EP14834965.7A patent/EP3030696B1/en active Active
- 2014-07-30 WO PCT/CA2014/050720 patent/WO2015017922A1/en active Application Filing
- 2014-07-30 AU AU2014305611A patent/AU2014305611B2/en not_active Ceased
- 2014-07-30 BR BR112016001955-5A patent/BR112016001955B1/en not_active IP Right Cessation
- 2014-07-30 CA CA2919331A patent/CA2919331C/en active Active
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US3434955A (en) * | 1965-05-26 | 1969-03-25 | Pechiney Prod Chimiques Sa | Lifting beam for electrolysis cells |
US3634224A (en) * | 1968-06-07 | 1972-01-11 | Montedison Spa | Apparatus for supporting electrodes particularly suited for suspended electrodes used in multicell furnaces for the production of aluminum |
FR2694945A1 (en) * | 1992-08-20 | 1994-02-25 | Pechiney Aluminium | Very high intensity electrolytic cell superstructure for aluminum production. |
EP1101726A1 (en) * | 1999-11-19 | 2001-05-23 | Reel S.A. | Lifting and load handling device for an aluminium production installation |
WO2012021924A1 (en) * | 2010-08-16 | 2012-02-23 | Aluminium Smelter Developments Pty Ltd | Rodless anode cassette |
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Cited By (2)
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CN110029366A (en) * | 2019-04-22 | 2019-07-19 | 贵州铝城铝业原材料研究发展有限公司 | A kind of mechanical steel pawl insulation construction of aluminium electroloysis continuous prebaked anode cell |
CN110029366B (en) * | 2019-04-22 | 2020-09-22 | 贵州铝城铝业原材料研究发展有限公司 | Aluminum electrolysis continuous prebaked anode mechanical steel claw heat insulation structure |
Also Published As
Publication number | Publication date |
---|---|
EP3030696B1 (en) | 2020-04-29 |
US10151038B2 (en) | 2018-12-11 |
CA2919331A1 (en) | 2015-02-12 |
EP3030696A4 (en) | 2017-03-29 |
BR112016001955B1 (en) | 2021-12-07 |
CN105917028B (en) | 2018-10-16 |
EA201690341A1 (en) | 2016-06-30 |
BR112016001955A2 (en) | 2017-08-01 |
AU2014305611A1 (en) | 2016-02-11 |
AU2014305611B2 (en) | 2018-08-09 |
EA029616B1 (en) | 2018-04-30 |
WO2015017922A1 (en) | 2015-02-12 |
CA2919331C (en) | 2021-11-16 |
CN105917028A (en) | 2016-08-31 |
US20160186343A1 (en) | 2016-06-30 |
DK179903B1 (en) | 2019-09-17 |
DK201670129A1 (en) | 2016-04-04 |
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