WO2018189463A1 - Procédé de mise en place d'une couverture d'anode dans une cellule d'électrolyse, machine de service apte à mettre en oeuvre un tel procédé et produit programme d'ordinateur pour la mise en oeuvre d'un tel procédé - Google Patents
Procédé de mise en place d'une couverture d'anode dans une cellule d'électrolyse, machine de service apte à mettre en oeuvre un tel procédé et produit programme d'ordinateur pour la mise en oeuvre d'un tel procédé Download PDFInfo
- Publication number
- WO2018189463A1 WO2018189463A1 PCT/FR2018/050865 FR2018050865W WO2018189463A1 WO 2018189463 A1 WO2018189463 A1 WO 2018189463A1 FR 2018050865 W FR2018050865 W FR 2018050865W WO 2018189463 A1 WO2018189463 A1 WO 2018189463A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thickness
- product
- cover
- covered
- anode
- Prior art date
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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
- C25C3/20—Automatic control or regulation of cells
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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
- C25C3/14—Devices for feeding or crust breaking
Definitions
- the invention relates to the field of aluminum production by igneous electrolysis according to the Hall-Héroult process. More specifically, the invention relates to the covering by a powdery product of anodes in electrolysis cells for the production of aluminum.
- Hall-Héroult is a well-known technique. In general, it is carried out in an electrolysis installation comprising a hall, in which a plurality of electrolysis cells is installed. Each tank is filled with an electrolytic bath including cryolite in which the alumina is dissolved. Pre-baked carbon anodes are partially immersed in the electrolytic bath. The anodes are fed with current flowing through the bath to a cathode formed generally at the bottom of the tank. Document FR 2 806 742 describes an example of such an installation.
- electrolysis reactions involve the progressive consumption of the anodes, which must be changed regularly.
- An anode may be defined as comprising a metal rod which conducts the current, sealed to at least one precooked carbon block. It is this carbon block that is consumed by the electrolysis reduction reactions.
- the carbon block In order to protect the combustion by air of the part of the carbon block which is not immersed in the electrolytic bath, it is known to cover the carbon block with a cover product on a controlled thickness, for example of the order of 10cm.
- the covering product is of the pulverulent type and comprises a mixture of alumina and "ground bath", that is, the electrolytic bath recovered, solidified and crushed.
- the cover product solidifies above the carbon block, but also the electrolytic bath, forming a crust.
- the crust protects the carbon block, but also the surface of the electrolytic bath.
- the composition of the roofing product can be monitored to ensure that the crust that forms above the carbon block has the required properties, and in particular that it does not allow the air to reach the carbon block or that it limits the leakage of the electrolytic bath to the outside of the tank.
- the document WO2009 / 055645 proposes an imaging system for obtaining images of the materials entering a hopper 40 where the alumina and particles of the electrolytic bath which constitute the cover product are mixed, and / or after the material of cover was deposited on one or more of the electrolysis cells.
- the images are then processed to predict the amount of alumina and / or electrolytic bath particles in the cover product and thus to determine whether the cover material has the composition required to achieve the intended crust quality.
- the amounts of alumina and electrolyte bath particles feeding the hopper are adjusted accordingly.
- Such a system involves image processing for the purpose of determining the composition of the cover product and ultimately the crust, which is complex to implement, and expensive.
- composition of the cover product also makes it possible to ensure that the air does not reach the carbon block: the thickness of the layer of the covering product covering the carbon block.
- the bath crust When changing an anode, the bath crust is cut around the spent carbon block, called a "butt", and the spent anode is lifted out of the tank. Part of the crust falls to the bottom of the tank, and a part remains attached to the butt.
- a cleaning operation using a shovel is carried out in order to recover the crustal portions that have fallen to the bottom of the tank.
- a new anode is placed so that the new carbon block is immersed in the electrolytic bath at a given height, with a portion of the new carbon block emerging out of the bath.
- the cover product is poured into the tank to cover the new carbon block and the space between the carbon blocks.
- the anode change operations require opening the tanks, which are normally closed by covers, to prevent the escape of toxic gases and fumes produced by the electrolysis reactions in the electrolysis hall.
- devices can limit the escape of gases, fumes and toxic dust, but can not totally prevent it.
- an operator being close to an open tank, for example to ensure proper distribution of the roofing product, is exposed to these gases and fumes.
- the automation and mechanization of tank handling operations is therefore the subject of research and development to keep human operators as far away as possible from tanks and gases and fumes escaping from them.
- MSE service machine in electrolysis
- the MSE carries tools to carry out the various interventions.
- An operator can control the MSE and tools remotely, from a cab.
- the spill of the roofing product into the tank is a difficult operation to automate.
- the cover product is generally stored in a hopper mounted on the MSE and provided with a dispensing device, typically a tube for pouring the cover product into the tank.
- a variable volumetric extraction device such as a pallet dispenser or an Archimedean screw, for example, is associated with the dispensing device to control the supply of cover material.
- a second object of the invention is to provide a method of handling tanks for recovery of carbon blocks effective.
- a third object of the invention is to enable the electrolytic bath to be covered in a reliable and controlled manner.
- a fourth object of the invention is to preserve operators of gases and fumes that can escape the tanks.
- a fifth object of the invention is to reduce the costs of tank operations.
- a sixth object of the invention is to allow the acquisition and recording of data relating to the operation of the vessel for purposes including analysis and process improvement.
- the invention proposes a method of placing a cover of at least one anode in an electrolysis cell used for the production of aluminum, by means of a mobile service machine. relative to the cell.
- the cell comprises a molten electrolytic bath in which an anode block of the anode is partially immersed, so that an upper surface of the anode block emerges out of the bath.
- the service machine comprises at least one dispensing device of one Anodic block cover product
- the process then comprises at least the following steps:
- the reference thickness being predetermined to allow the cover product to cover the upper surface of the anode block to a given height in at least said area to be covered;
- the method comprises, prior to step / 1 / deposition, a mesh step of at least a portion of the upper portion of the carbon block defining a plurality of areas to be covered by the cover product . Therefore, at least part of the steps / 1 / deposition, III measurement, / 3 / comparison, / 4 / calculation and / 5 / rectification can be performed directly successively one after the another for an area to be covered before moving to a next area to be covered.
- At least a part of the steps / 1 / deposition, / 2 / measurement, / 3 / comparison, / 4 / calculation and / 5 / rectification can be performed together in sequence, each step being applied to several areas to be covered before proceeding to the next step.
- the thickness sensor may comprise a three-dimensional camera, making it possible to take measurements in one area and / or a two-dimensional laser in one image.
- the rectification step comprises adding the corrective amount of cover product to the area to be covered by the dispensing device.
- the correction amount determined in step / 3 / is then positive.
- the correction amount determined in step / 4 / is then negative.
- the rectification step may then comprise distributing by a scraper device a controlled amount of the cover material from the first area to be coated to the second area to be coated.
- the controlled amount of the cover product may correspond to a layer thickness less than or equal to the reference thickness, i.e. at the first stage, there is a deficit of quantity of cover product to reach the reference thickness.
- the method may comprise, prior to step / 1 / deposition, a step of setting a trajectory for the dispensing device which includes a recording of the movements of a controlled dispensing device by an operator.
- a learning step from an operator for the dispensing device is performed.
- the method may comprise, prior to step / 1 / deposition, a step of setting a trajectory for the dispensing device which comprises a correction of the controlled quantity of cover product in step / l / deposition by taking into account the amount of additional covering product to be deposited to achieve the reference thickness in said area to be covered calculated in a step / 4 / calculation implemented for a block anodic previous.
- the method comprises a step of learning from the past: for two anode blocks to similar characteristics (dimensions and position in the tank in particular), the amount of cover product to be deposited to achieve the reference thickness is substantially identical.
- the method may further comprise a step of collecting and recording the data taken by the thickness sensor. This data can then be used to monitor the overall operation of an aluminum production plant.
- the invention proposes a service machine of an electrolysis cell used for the production of aluminum, the machine being able to implement the method as presented above.
- the machine then comprises at least one device for dispensing a cover product and at least one thickness sensor for the cover product.
- the invention proposes a computer program product for implementing the method as presented above, comprising a control system of the service machine receiving the measurements of the thickness sensor, the system control system comprising a calculation module comparing the thickness measured by the sensor and a reference thickness and calculating the corrective amount of covering product to be deposited to reach the reference thickness.
- FIG. 1 is a schematic representation of an electrolysis room
- Figure 2 is a schematic representation of a sectional view of an electrolysis cell
- Figure 4 is a schematic representation of two preformed anode blocks mounted on the same hexapod, viewed from above.
- FIG. 1 shows an electrolysis room 1 such as those commonly found in electrolytic aluminum production plants. Electrolysis cells 2 are aligned in the electrolysis room. In order to intervene on the cells 2, the electrolysis room 1 is equipped with a mobile bridge 3 moving above the cells 2 and on which an electrolysis service machine, or MSE, 4 can move.
- the MSE 4 carries tools for carrying out operations on the cells 2, such as the change of worn anodes by new anodes, the cleaning of the cell 2, the supply of alumina, or the handling of equipment. cell 2.
- the cells 2 are arranged in rows in the electrolysis room 1, and are electrically connected in series with each other.
- a corridor 5 is arranged in the room 1 along the rows of cells 2, to allow for example the movement of an operator or a mobile machine.
- FIG. 2 illustrates an electrolysis cell 2 seen in section.
- the cell 2 comprises a tank 6, a support structure called “superstructure” 7 and a plurality of anodes 8, 8 '.
- Each anode respectively 8, 8 ' comprises at least one block, respectively 9, 9', of precured carbon material, called “anodic block", which is fixed on a rod respectively 10, 10 'metal, extending substantially vertically.
- each anode 8, 8 ' comprises in practice two blocks 9, 9' anodic each, mounted on the same rod 10, 10 'metal.
- the anodic blocks 9, 9 ' typically have a parallelepipedal shape.
- Each rod 10, 10 ' is held in abutment against an anodic frame 11, 11' of the superstructure 7 by means of a removable connector 12, 12 '.
- each anode block 9, 9 ' is fixed to the corresponding rod 10, 10' via a fastening element 13, 13 ', called a "multipode".
- Each fixing element 13, 13 ' comprises feet, anchored in the anode blocks 9, 9', in particular using cast iron.
- each element 13, 13 'of attachment comprises six feet, in which case they are called “hexapods", and allow the attachment of two anode blocks on a rod.
- the tank 6 is typically formed of a steel casing 18, a liner 14, 15 generally formed of blocks of refractory materials, and a cathode assembly 16, 17 which comprises blocks 16 of carbonaceous material, called “cathode blocks” , and metal connection bars 17, to which electrical conductors, not shown, are fixed to convey the electrolysis current. More specifically, for a tank, the connecting bars 17 are fixed on one side to the connecting bars of an adjacent tank and on the other hand to the anode frames of another adjacent tank.
- the electrolysis cell 2 is generally closed by removable covers 19, 19 ', making it possible to confine the gases and fumes in the cell 2.
- a system for evacuating and treating these gases and fumes is generally put in place.
- the covers 19, 19 ' are removable, to give access to the interior of the cell, including the tools of the MSE 4, by two sides when interventions must be made.
- the cover 19 'giving access to the anode 8' to be replaced is removed.
- a crust has formed on the surface of the bath 20 in contact with the air. Consequently, a cutting tool is actuated, for example from the MSE 4, to cut the crust around the anode block (s) 9 'of the anode 8' to be replaced.
- a lifting system grasps the rod 10 'of the anode 8' to be replaced, and the corresponding connector 12 'is unlocked, allowing the removal of the anode 8' out of the cell 2.
- a new anode is then placed in the cell, with a new anode block immersed at least partially in the electrolytic bath.
- a few hours, usually 3 hours after the introduction of the new anode in cell 2, a thin solid crust has formed around the anodic block again, and a cover product 22 is spilled. on the surface of the anode block emerging out of the electrolytic bath.
- the MSE 4 is provided with at least one device 23 for dispensing a cover product for the carbonaceous blocks.
- the device 23 for dispensing a cover product for the carbonaceous blocks.
- the dispensing device 23 is further provided with an extraction device for controlling the quantity, for example by controlling the flow rate, of the cover product poured by the tube 25.
- the dispensing device 23 is controlled to be mobile with respect to the cell 2, since it is boarded on the MSE 4.
- the MSE 4 is mobile in translation along two horizontal axes with respect to the cell 2
- the distribution device 23 is mobile in translation along a third vertical axis and in rotation about this third axis with respect to the cell 2.
- the MSE 4 is also equipped with at least one thickness sensor 26, shown diagrammatically in FIG. 3, making it possible to measure the thickness of the covering product layer.
- the thickness sensor 26 may be, as will be the case in the embodiment described hereinafter, a three-dimensional camera, capable of measuring a thickness of the layer of the covering product over an area of a determined surface without displacement.
- the thickness sensor 26 may be a two-dimensional laser scanner, scanning an area of a given surface, for example by moving the MSE 4, to determine a thickness.
- the thickness of the roofing product is defined as a vertical dimension of the layer of the roofing product. It can correspond, for a zone of a given surface, to a maximum dimension, a minimum dimension, or an average of dimensions.
- the thickness sensor 26, of known position is initially pointed at a reference zone of the anode 8.
- the reference zone is typically located on the rod 10 or on the fixing element 13, and is preferably a substantially horizontal surface.
- the sensor 26 stores a position data for a plurality of points R f in the reference area, typically a distance D ref between these points R f and the sensor 26. In FIG. 3, for the sake of clarity, it is shown only one of these points R f .
- the distance D r f can be calculated as an average distance, a minimum distance or a maximum distance between the points R f and the sensor 26.
- the distance D r f can also be calculated from several zones. reference, in order to limit the influence on the distance measurement of the cover product that may be in place on the rod 10 or on the fastening element 13.
- the reference area is chosen because it is at a known vertical distance from an upper face of the blocks S sup anode 9 emerging from the electrolytic bath 20. Thus, it is possible to deduce a distance D sup between the upper surface S sup of the anodic blocks 9 and the sensor 26. Then, the sensor 26 is pointed at a zone to be measured, on the surface of the cover product 22 covering the anode blocks 9 of the anode 8.
- the sensor 26 stores a position data for a plurality of points R p of the zone to measure, typically the distance D p between these points R p and the sensor 26. As previously, in Figure 3, for the sake of clarity, there is shown a single point R p of the area to be measured. However, the distance D p can be calculated as an average distance, a minimum distance or a maximum distance between the points R p and the sensor 26.
- the thickness of the cover product 22 at the point R p is given by the distance D e corresponding to the difference between D sup and D p .
- the sensor 26 can thus determine the thickness D e for a plurality of points R p on the surface of the product 22 cover.
- the thickness of the cover product layer 22 in an area to be measured can then be defined as an average, a maximum or a minimum, for the area to be measured in question.
- the sensor 26 may take a measure of the distance from the upper surface S sup of the anode block 9 in the tank 6 before the cover product is poured over it.
- the distance D between the S sup sup upper face of the anode block 9 and the sensor 26 is measured directly, rather than calculated as above.
- this measurement may correspond to the measurement between a point of the upper surface S sup of the anodic block 9, a minimum, a maximum or an average.
- the measurement of the distance D sup instead of the deduction from the distance measurement Dr. ef increases the reliability of determining the thickness D e of the layer of product 22 cover.
- D ref is measured on a surface of the rod 8 or the fastening element 13, which may involve measurement errors due for example to erosion, the presence of roofing product on it or even MSE positional deviations 4.
- the surface area S sup of the anodic block 9 is greater than that available on the rod 8 or the fastening element 13, so that the sensor 26 can point more easily on the surface S sup .
- the measurement of D sup makes it possible to take into account the thickness of the possible residue of cover product at the periphery of the new anodic block 9.
- the actual product thickness 22 covering the anode block 9 is therefore evaluated more precisely. Therefore, the amount of blanket 22 to be poured to reach a target thickness can also be determined with increased accuracy.
- the control system which will be described below with the steps of the process, can be embedded directly on the MSE 4 and be accessible remotely, or be embedded in any remote computer system of the MSE 4 and in connection with the MSE 4.
- FIG. 4 there is shown a top view of the two blocks 9 anode, mounted on the same shaft 10 with the same hexapod 13. It is then defined by way of example fourteen zones, denoted Ai, A i4 .
- Each zone A 1, A i 4 includes at least a portion of the upper surface S sup of at least one of the anode blocks 9.
- the areas A n to be covered include the space E between two adjacent anodes of the cell 2, and may also include the upper surface S sup of an anode block 9 of an adjacent anode. However, some areas may only include the E space between two adjacent anodes.
- the control system is provided with a mesh module, defining the areas A n to cover for example from calculations, from a mesh defined by an operator and recorded in the control system or from a mesh defined on plan by an operator and configured in the control system.
- a layer of the cover product in controlled quantity is deposited by the dispensing device 23 on at least one of the areas A n to be covered.
- the amount of cover product is controlled to be less than an amount corresponding to a determined thickness of the cover product for the area of interest.
- the hedge product is deposited in deficit.
- the flow of the cover product is difficult to control, so that it is difficult to ensure that the thickness of the deposited layer is actually less than the determined thickness.
- any surplus of roofing product constitutes an economic loss, in particular: the hopper 24 must be filled more often, inducing additional round trips increasing the intervention time on the cells 2; the surplus of roofing product involves more waste in the electrolysis bath which must then be treated; the electrolysis process itself can be impacted by the modification of the composition of the electrolytic bath.
- the amount of cover material is controlled for example by mounting the hopper on load cells, and controlling the flow rate of cover product flowing through the tube with the aid of the extraction device.
- the controlled quantity can be established as being an overall quantity for the entire area to be covered, and then distributed between the areas A n to be covered according to a correspondence table, established empirically or by calculation.
- the senor 26 is then implemented in the at least one area A n to cover, in order to measure the thickness, as previously seen, of the deposited layer of roofing product.
- the mesh in zone A n does not necessarily concern the whole of the upper surface S sup of the anode blocks 9.
- the layer of roofing product covers the entire upper surface S sup of 9 anodic blocks, and A n areas to be covered constitute control areas.
- the thickness measured by the sensor 26 is then compared with a reference thickness.
- the reference thickness is predetermined to allow the cover product 22 to cover the surface S sup of the anode blocks 9 at a given height.
- the reference thickness is generally the same for all zones A n to be covered, but not necessarily.
- the reference thickness may be a given value, or a range of given values.
- the measurements by the sensor 26 are transmitted to the control system, which records the measurements.
- the reference thickness or thicknesses were previously recorded in the control system.
- the control system then comprises a calculation module making it possible, for the zone A n concerned, to compare the measured thickness with the corresponding reference thickness.
- the calculation module deduces, from the difference, a corrective amount of cover product to be deposited again in the area A n to be covered.
- a step of rectification of the layer of the cover product is implemented in the area A n concerned as a function of the correction amount determined.
- the correction amount calculated in the fourth step may be zero. In this case, the fifth rectification step may not take place.
- the calculation module determines the corrective amount, positive, of coverage product corresponding to the deficit.
- the dispensing device 23 is then actuated by the control system to deposit the corrective quantity of cover product on the surface S sup of the anodic blocks 9, in the area A n concerned.
- the correction amount is translated into flow and / or time, and the dispensing device 23 is actuated accordingly to pour the cover product.
- the calculation module determines the corrective, negative amount of roofing product corresponding to the surplus.
- a device for removing the surplus quantity in the area A n concerned can be implemented.
- the corrective amount is positive: the cover product is surplus.
- the other zone A Jf the corrective amount is negative: the cover product is in deficit.
- the fifth rectification step may comprise the distribution, by means of a scraping device, of the cover product from the first zone A, in excess of the cover product to the other zone Aj in deficit of blanket.
- a new measurement step 26 by the thickness sensor in the two zones A, and A j can then be implemented in order to check the conformity, in each zone, of the thickness of the layer of roofing product with the corresponding reference thickness. If necessary, a new rectification step can be implemented in each zone A ,, Aj.
- the steps of the method can be carried out, as a whole or in part, successively one after the other for each zone A n to be covered.
- the four steps presented above are applied to the area Ai of Figure 4, before being applied to the area A 2 , and so on.
- the process steps can also be carried out, as a whole or in part, in sequence for several areas A n to be covered.
- the first step is applied to all fourteen zones Ai, A i4 to be covered before applying the second step to all fourteen zones Ai, A i4 to be covered, and so on until fifth step.
- zone Ai As a variant, only the first, second and third stages are implemented in the first zone Ai before passing to zone A 2 , in which only these three steps are also implemented, and so on. to zone A i4 . Then, the fourth and fifth steps are applied in turn, either successively zone by zone, or one after the other for all areas A n to cover.
- the process can be repeated from the second measurement step to ensure that the reference thickness is reached. It can then normally be expected that during the repetition of the process, the corrective amount calculated in the fourth step is zero.
- the process steps can be applied in real time.
- the steps of the method can be implemented substantially simultaneously.
- the sensor 26 can be implemented almost continuously during the deposition of the layer of roofing product, in order to provide the control system with information about the thickness of the layer being deposit, and allow the correction of the amount of coverage product deposited during the deposit.
- a control loop can be implemented, in which the correction amount can be calculated regularly, at a determined frequency, while the cover product is being deposited, so as to rectify at most quickly the quantity of roofing product spilled over the quantity determined.
- the distribution device 23 In order to cover with the cover product at least a given portion of the upper surface S sup of the anode blocks 9 of the anode 8 to be covered, the distribution device 23 describes a given trajectory above the upper surface S sup of the 9 anodic blocks.
- the trajectory is defined as the order of passage of the dispensing device 23 between the different zones A n to be covered.
- the trajectory is associated with a transit time, that is to say the time that the distribution device 23 passes, for a zone A, to cover, for a determined flow, corresponding to a determined quantity of cover product to be deposited. .
- the determined amount of product is less than the amount necessary to reach the reference thickness.
- the trajectory and the transit time are developed by simulation, or by theoretical calculation.
- the development of the given trajectory and the transit time for each zone A to be covered by the distribution device 23 is carried out prior to the first depositing step, and includes the recording of the movements and passage times of the same distribution device 23, or another equivalent, controlled by an operator.
- an operator remotely controls the movements of the MSE 4 and the distribution device 23, as well as the passage time of the distribution device 23 in each zone A, to be covered, and the flow rate of the cover product, for 9 anodic blocks of a first anode 8, called test.
- a recording system records the data for the anode blocks 9 of the anode 8 test.
- the following process steps are implemented for the anode blocks 9 of the test anode 8.
- the trajectory given for the blocks 9 of this other anode 8 and the associated transit times are copied to the trajectory recorded for the anode 8 test.
- the trajectory and the passage times determined for the test anode 8 can be adapted to the position of the other anode, for example by considering a mirror symmetry effect on either side of the hexapod.
- the trajectory of the distribution device 23 is developed by learning from an operator.
- the development of the trajectory and the passage times of the distribution device 23 for the anode blocks 9 of anode 8 include taking into account the step of calculating a quantity. correction applied prior to another anode. More specifically, the steps of the method, from the first deposition step to at least the fourth step of calculating a correction quality, are implemented for the anode blocks 9 of a first anode 8. In practice, the process in its entirety, until the fifth step, can be put for the blocks 9 of the first anode 8. The correction quantity for the anode blocks 9 of the first anode 8 is then recorded, and taken into account for the development of the trajectory for the anode blocks 9 of a second anode 8, in particular to correct the amount of cover material deposit in the first step.
- the controlled amount of cover material deposited in the first deposition step for the blocks 9 of the second anode 8 can be increased compared to that deposited in the first deposition step for the blocks 9 of the first anode 8.
- the controlled quantity of deposited cover product in the first deposition step for the blocks 9 of the second anode 8 can be decreased compared to that deposited in the first deposition step for the blocks 9 of the first anode 8. The trajectory of the dispensing device can thus be corrected for each anodic block 9.
- Such a correction can be applied step by step: each time the process is applied, the correction amount is taken into account for the next application of the process.
- the corrected trajectory can also be recorded in relation to given conditions, for example temperature conditions or type of cover product used, so that when these same conditions are met for other anodes, the process is automatically adapted.
- the trajectory and the passage times are furthermore associated with a given flow rate controlled by the control system acting on the extraction device.
- the passage time on the different areas A n to be covered may be the same for each zone, that is to say that the speed of movement of the distribution device 23 is constant, and the flow rate be regulated.
- the correcting amount calculated in the fourth step is zero, indicating that the controlled amount deposited in the first step is the amount required to reach the reference thickness.
- the fifth rectification step is then empty.
- the measurement data of the thickness sensor 26 are collected and recorded in order to be used, for example, to analyze the quality of coverage by the product and to monitor the operation of a cell 2.
- the method thus described makes it possible to automate and mechanize the operations of placing the anode cover in the cells 2 in a reliable and repeatable manner, by increasing the safety of the human operators located near the electrolysis cells 2 and by reducing the problems related to a bad evaluation of the quantity of anode cover product to be deposited to cover the carbon blocks.
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- Chemical Kinetics & Catalysis (AREA)
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- Electrolytic Production Of Metals (AREA)
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201880032322.0A CN110637106B (zh) | 2017-04-10 | 2018-04-06 | 在电解槽中安装阳极外盖的方法,能够实现该方法的工作机以及用于该方法的实施的计算机程序产品 |
CA3058228A CA3058228A1 (fr) | 2017-04-10 | 2018-04-06 | Procede de mise en place d'une couverture d'anode dans une cellule d'electrolyse, machine de service apte a mettre en oeuvre un tel procede et produit programme d'ordinateur pour la mise en oeuvre d'un tel procede |
AU2018251178A AU2018251178B2 (en) | 2017-04-10 | 2018-04-06 | Process for installing an anode cover in an electrolytic cell, service machine capable of implementing such a process and computer program product for the implementation of such a process |
EP18718623.4A EP3610054B1 (fr) | 2017-04-10 | 2018-04-06 | Procédé de mise en place d'une couverture d'anode dans une cellule d'électrolyse, machine de service apte à mettre en oeuvre un tel procédé et produit programme d'ordinateur pour la mise en oeuvre d'un tel procédé |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1753121A FR3065014B1 (fr) | 2017-04-10 | 2017-04-10 | Procede de mise en place d'une couverture d'anode dans une cellule d'electrolyse, machine de service apte a mettre en oeuvre un tel procede et produit programme d'ordinateur pour la mise en oeuvre d'un tel procede |
FR1753121 | 2017-04-10 |
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Publication Number | Publication Date |
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WO2018189463A1 true WO2018189463A1 (fr) | 2018-10-18 |
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PCT/FR2018/050865 WO2018189463A1 (fr) | 2017-04-10 | 2018-04-06 | Procédé de mise en place d'une couverture d'anode dans une cellule d'électrolyse, machine de service apte à mettre en oeuvre un tel procédé et produit programme d'ordinateur pour la mise en oeuvre d'un tel procédé |
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Country | Link |
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EP (1) | EP3610054B1 (fr) |
CN (1) | CN110637106B (fr) |
AU (1) | AU2018251178B2 (fr) |
CA (1) | CA3058228A1 (fr) |
FR (1) | FR3065014B1 (fr) |
WO (1) | WO2018189463A1 (fr) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2527229A1 (fr) | 1982-05-18 | 1983-11-25 | Aluminium Grece | Procede de calorifugeage des anodes precuites dans les cuves d'electrolyse pour la production d'aluminium |
FR2806742A1 (fr) | 2000-03-24 | 2001-09-28 | Pechiney Aluminium | Implantation d'installations d'une usine d'electrolyse pour la production d'aluminium |
US20040211663A1 (en) * | 2003-04-25 | 2004-10-28 | Gagne Jean Pierre | Process and apparatus for positioning replacement anodes in electrolytic cells |
FR2900938A1 (fr) * | 2006-05-15 | 2007-11-16 | Ecl Soc Par Actions Simplifiee | Procede de fabrication d'anodes pour la production d'aluminium par electrolyse ignee, lesdites anodes et leur utilisation |
WO2009055645A1 (fr) | 2007-10-25 | 2009-04-30 | Alcoa Inc. | Procédés, systèmes et appareil destinés à déterminer la composition des substances de base de cellules métalliques d'électrolyse |
US20120197542A1 (en) * | 2011-01-31 | 2012-08-02 | Alcoa Inc. | Systems and methods for determining alumina properties |
WO2016016516A1 (fr) * | 2014-08-01 | 2016-02-04 | Fives Ecl. | Véhicule pour l'exploitation de cellules d'une installation de production d'aluminium, installation et procédé |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2614320B1 (fr) * | 1987-04-21 | 1989-06-30 | Pechiney Aluminium | Procede et dispositif de controle des additions d'electrolyse solide dans les cuves d'electrolyse pour la production d'aluminium. |
CN101580948A (zh) * | 2009-06-24 | 2009-11-18 | 中国铝业股份有限公司 | 一种预焙铝电解槽的装炉方法 |
CN205529069U (zh) * | 2016-04-12 | 2016-08-31 | 贵阳铝镁设计研究院有限公司 | 确定阳极覆盖料添加厚度的工具 |
-
2017
- 2017-04-10 FR FR1753121A patent/FR3065014B1/fr not_active Expired - Fee Related
-
2018
- 2018-04-06 AU AU2018251178A patent/AU2018251178B2/en active Active
- 2018-04-06 WO PCT/FR2018/050865 patent/WO2018189463A1/fr unknown
- 2018-04-06 EP EP18718623.4A patent/EP3610054B1/fr active Active
- 2018-04-06 CA CA3058228A patent/CA3058228A1/fr active Pending
- 2018-04-06 CN CN201880032322.0A patent/CN110637106B/zh active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2527229A1 (fr) | 1982-05-18 | 1983-11-25 | Aluminium Grece | Procede de calorifugeage des anodes precuites dans les cuves d'electrolyse pour la production d'aluminium |
FR2806742A1 (fr) | 2000-03-24 | 2001-09-28 | Pechiney Aluminium | Implantation d'installations d'une usine d'electrolyse pour la production d'aluminium |
US20040211663A1 (en) * | 2003-04-25 | 2004-10-28 | Gagne Jean Pierre | Process and apparatus for positioning replacement anodes in electrolytic cells |
FR2900938A1 (fr) * | 2006-05-15 | 2007-11-16 | Ecl Soc Par Actions Simplifiee | Procede de fabrication d'anodes pour la production d'aluminium par electrolyse ignee, lesdites anodes et leur utilisation |
WO2007132081A2 (fr) | 2006-05-15 | 2007-11-22 | E.C.L. | Procede de fabrication d'anodes pour la production d'aluminium par electrolyse ignee, lesdites anodes et leur utilisation |
WO2009055645A1 (fr) | 2007-10-25 | 2009-04-30 | Alcoa Inc. | Procédés, systèmes et appareil destinés à déterminer la composition des substances de base de cellules métalliques d'électrolyse |
US20120197542A1 (en) * | 2011-01-31 | 2012-08-02 | Alcoa Inc. | Systems and methods for determining alumina properties |
WO2016016516A1 (fr) * | 2014-08-01 | 2016-02-04 | Fives Ecl. | Véhicule pour l'exploitation de cellules d'une installation de production d'aluminium, installation et procédé |
Also Published As
Publication number | Publication date |
---|---|
EP3610054A1 (fr) | 2020-02-19 |
EP3610054B1 (fr) | 2022-01-05 |
FR3065014B1 (fr) | 2019-06-28 |
CA3058228A1 (fr) | 2018-10-18 |
CN110637106A (zh) | 2019-12-31 |
AU2018251178B2 (en) | 2023-11-16 |
CN110637106B (zh) | 2022-04-05 |
FR3065014A1 (fr) | 2018-10-12 |
AU2018251178A1 (en) | 2019-10-10 |
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