EP1819847A2 - Procédé de changement d'anode dans une cellule de production d'aluminium par électrolyse incluant un ajustement de la position de l'anode et dispositif pour le mettre en oeuvre - Google Patents
Procédé de changement d'anode dans une cellule de production d'aluminium par électrolyse incluant un ajustement de la position de l'anode et dispositif pour le mettre en oeuvreInfo
- Publication number
- EP1819847A2 EP1819847A2 EP05800606A EP05800606A EP1819847A2 EP 1819847 A2 EP1819847 A2 EP 1819847A2 EP 05800606 A EP05800606 A EP 05800606A EP 05800606 A EP05800606 A EP 05800606A EP 1819847 A2 EP1819847 A2 EP 1819847A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- anode
- measuring system
- replacement
- gripping member
- generator
- 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
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 40
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000004411 aluminium Substances 0.000 title abstract 2
- 238000005259 measurement Methods 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 239000003575 carbonaceous material Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 229910016569 AlF 3 Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000009626 Hall-Héroult process Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001594 aberrant effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000002399 angioplasty Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
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- 239000011247 coating layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000004481 post-translational protein modification Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
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- 239000011819 refractory material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/06—Operating or servicing
Definitions
- the invention relates to the production of aluminum by igneous electrolysis according to the Hall-Héroult method. It relates more particularly to anode changes and service units intended to effect anode changes in aluminum production plants.
- Aluminum is produced industrially by igneous electrolysis in electrolysis cells according to the well-known Hall-Héroult process.
- French patent application FR 2 806 742 (corresponding to US Pat. No. 6,409,894) describes installations of an electrolysis plant intended for the production of aluminum.
- the electrolysis cells comprise a plurality of so-called "precooked" anodes of carbonaceous material which are consumed during the electrolytic reduction reactions of aluminum.
- the gradual consumption of the anodes requires interventions on the electrolysis cells, including, in particular, the replacement of the spent anodes with new anodes.
- the new anode In order to limit the disturbance of the operation of an electrolysis cell during an anode change, it is preferable to place the new anode so that its lower surface is at the same level as that of the other anodes of the anode. the cell. It is known to operate as follows to ensure a correct leveling of new anodes.
- the worn anode rod is marked with a chalk mark at a location corresponding to a specific mark on the anode frame.
- the spent anode is extracted from the cell and deposited on a reference surface, which is typically a metal tray.
- the level of the chalk line on the rod is raised, the spent anode is removed and a new anode is placed on the reference surface.
- a chalk line is drawn on the stem of the new anode at the raised level.
- the new anode is placed on the anode frame so that the chalk line is located at the determined mark on the anode frame.
- the anode handling tool with a position sensor.
- the distance traveled by the tool during the taking of the spent anode is measured, the worn anode is deposited on a reference surface and the distance traveled by the tool at the moment when the anode is measured. rests on the reference surface.
- the spent anode is removed, a new anode is deposited on the reference surface and the distance traveled by the tool is measured at the moment when the anode rests on the reference surface.
- the difference between the last two measured distances is added to the first measured distance in order to determine the distance to be traveled to the handling tool when positioning the new anode in the electrolysis cell.
- the subject of the invention is an anode changing method of an igneous electrolysis aluminum production cell comprising a plurality of anodes, said cell containing an electrolytic bath and comprising at least one cathode block, each anode comprising at least one minus an anode block and a metal rod and being removably attached to a movable metal frame by mechanical fixing means, each anode block having a reference surface, the method of replacing at least one spent anode determined by an anode of replacing using at least one anode handling tool comprising a positioning member, a gripping member and a vertical position sensor of the gripping member, and wherein the position sensor of the or each tool is used.
- anode handling for measuring the distances traveled vertically by the or each gripping member with respect to a reference level Nce, characterized in that at least one sound or electromagnetic wave beam is produced in a given axis or reference plane, and in that for each determined spent anode:
- a gripping member is placed in the gripping position of the metal rod of the spent anode and the vertical distance A traversed by the gripping member to reach said position is measured;
- the used anode is removed from the electrolysis cell, the anode block of this anode is passed through the said beam in a vertical movement and the vertical distance B traversed by the gripping member is measured at the moment when the surface reference of this anode passes through said beam;
- the metal rod of a replacement anode is grasped with the aid of a gripping member, the anode block of this anode is passed through the beam in a vertical movement and the vertical distance C traversed by the gripping member at the moment when the reference surface of this anode passes through said beam; the vertical position of the replacement anode in the cell is determined from the values obtained for said distances traveled A, B and C, and the replacement anode is placed at this position in the location initially occupied by the worn anode. 5
- the invention makes it possible to carry out the measurements necessary for the positioning of a replacement anode during the handling movements necessary for the replacement of an anode (namely typically the taking of an anode used on an electrolysis cell, the deposit worn anode on a pallet or a vehicle, taking
- the invention thus makes it possible to avoid, in particular, an extension of the opening time of an electrolysis cell.
- the beam or beams of sound or electromagnetic waves are advantageously placed beforehand at a place that allows the passage of a worn anode or a replacement anode through the beam (s) during the movements of the
- the measurement taken can be manual, that is to say, an operator records t data obtained at each process step, or automated in whole or in part, that is to say, a computerized device performs automatically all or part of the measurements.
- the invention also relates to a measuring system comprising a position sensor for measuring the vertical distances traveled by an anode gripping member, a sonic or electromagnetic wave beam generator, capable of producing at least one beam of sound or electromagnetic waves in a given axis or reference plane, at least one sound or electromagnetic wave detector capable of detecting the passage of a determined part of an anode through said beam and at least one positioning member to which is fixed said generator and / or said detector.
- the invention further relates to a service machine for anode change operations of a series of aluminum production cells by igneous electrolysis, said machine comprising at least one anode handling tool comprising an organ positioning device, a gripping member and a vertical position sensor of the gripping member, and being characterized in that it further comprises said measuring system.
- the invention also relates to a service unit of an igneous electrolysis aluminum production plant comprising a movable bridge and at least one
- Figure 1 illustrates, in section, a typical electrolysis room for the production of aluminum and comprising a service unit shown schematically.
- Figure 2 illustrates, in cross-sectional view, a typical electrolysis cell for the production of aluminum.
- Figure 3 shows, schematically, a service machine viewed from the side.
- FIGS 4 and 7 illustrate an embodiment of the anode changing method according to the invention.
- Electrolysis plants for aluminum production include a liquid aluminum production zone that includes one or more electrolysis rooms (1). As illustrated in Figure I 3 each electrolysis room (1) comprises electrolysis cells (2) and at least one service unit (4). Service units are often referred to as "electrolysis service machines" or “MSEs"("PTAs” or “Pot Tending Assemblies” or “PTMs” or “Pot Tending Machines” in English).
- MSEs electrolysis service machines
- the electrolysis cells (2) are normally arranged in rows or rows, each row or line typically having more than one hundred cells, and electrically connected in series by means of connecting conductors.
- the cells (2) are arranged in such a way as to clear the circulation paths (3) between the cells and along the electrolysis room (1).
- each electrolysis cell (2) comprises a tank (2 '), a support structure (35) called “superstructure” and a plurality of anodes (2O 5
- the tank (2 ') comprises a box (26) of steel, an inner lining (27,
- the anodes (20, 20 ') comprise at least one anode block (21, 21') of precured carbon material and a metal rod (22, 22 ').
- the anode blocks (21, 21 ') typically have a parallelepiped shape.
- anode block (s) 21, 21 '
- a fastener 22a, 22a 1
- multipode which is anchored in the (s) Anode block (s) (typically using cast iron).
- the anodes (20, 20 ') are removably attached to a movable metal frame (23), referred to as the "anode frame", by mechanical fastening means (24, 25) typically comprising
- An electrolysis cell (2) generally comprises a cowling system (36), typically comprising a series of cowls, for confining the effluents inside the cell, and means (not shown) for discharging effluents and wastewater. direct to a treatment center.
- cowling system typically comprising a series of cowls, for confining the effluents inside the cell, and means (not shown) for discharging effluents and wastewater. direct to a treatment center.
- the inner lining (27, 28) and the cathode blocks (29) form, inside the tank (2 '), a crucible adapted to contain the electrolyte bath (33) and a sheet of liquid metal (32). ) when the cell is in operation.
- a cover of alumina and solidified bath (34) covers the electrolyte bath and all or part of the anodes.
- the anodes (20, 20 '), and more precisely anode blocks (21, 21'), are partially immersed in the electrolyte bath (33), which contains dissolved alumina.
- the bottom surface (21a, 21a ') of the anodes is typically substantially planar and parallel to the top surface (29') of the cathode blocks (29), which is generally horizontal.
- the distance between the lower surface of the anodes and the upper surface of the cathode blocks, called “anode-cathode distance" is an important parameter in the regulation of the electrolysis cells.
- the anode-cathode distance is generally controlled with great precision.
- the anode blocks (21, 21 ') are gradually consumed in use. To compensate for this wear, it is common practice to gradually lower the anodes (20, 20 ') by moving the movable frame (23) downwards regularly. In addition, as illustrated in FIG. 2, the anode blocks (21, 21 ') are generally at different degrees of wear. Therefore, the position of the replacement anode (20 "), commonly referred to as” new anode ", relative to the movable frame (23) is generally adjusted at each anode change, more specifically, the position of the anodes is adjusted.
- the so-called “lower” surface (21a, 21a 1 , 21a ") of the anode blocks (21, 21 ', 21") that is to say the surface of the anode blocks which is intended to be immersed in the electrolytic bath (33) contained in the electrolysis cell (2) and to be parallel to the upper surface (29 ') of the cathode blocks (29).
- the replacement anode (20 ) is placed so that, after reaching its operating temperature, its lower surface (2Ia") is located at the lower surface (21a 1 ) of the worn anode (20 ') that it replaces.
- Said lower surface (21a, 21a ', 21a ") of the anode blocks (21, 21', 214) is generally substantially planar.
- the service unit (4) is used to carry out operations on the cells (2) such as the anode changes or the filling of the ground bath supply hoppers and the AlF 3 of the electrolysis cells. It can also be used to handle various loads, such as tank elements, pockets of liquid metal or anodes.
- the service unit (4) comprises a movable bridge (5) which can be translated over the electrolysis cells (2) and a service machine (6).
- the service machine (6) comprises a mobile carriage (7) and a service module (8) equipped with several handling and intervention devices (10), such as tools (shovels, keys, stitches, etc.). ).
- the service module (8) typically comprises a turret (8 ') mounted on the carriage (7) so as to be pivotable about a vertical axis V in use.
- the handling and intervention members (10) are typically attached to the turret.
- the service module (8) may also include a control cabin (16) for the operators.
- the movable bridge (5) rests and circulates on raceways (9, 9 ') arranged parallel to each other and to the main axis of the hall (and the queue of cells).
- the mobile bridge (5) can thus be moved along the electrolysis room (1).
- the movable carriage (7) can be moved along the movable bridge (5).
- the service machines (6) used for the anode changing operations are equipped with a set of tools (10), typically a picker (11a), a shovel bucket (12a), an anode gripping member (called “anode gripper”) (13a) and a hopper (14) provided with a retractable duct (15).
- a set of tools (10 typically a picker (11a), a shovel bucket (12a), an anode gripping member (called “anode gripper”) (13a) and a hopper (14) provided with a retractable duct (15).
- the piercer (l ia) serves to break the crust of alumina and bath solidified (34) which generally covers all or part of the anodes of the cell;
- the bucket shovel (12a) serves to clear the location of the anode, after removal of the spent anode, by removal of solids (such as pieces of crust and alumina) therein ;
- the anode clamp (13a) serves to grip and manipulate the anodes by their rod, in particular for the removal of spent anodes from an electrolysis cell and the placement of new anodes in the electrolysis cell;
- the retractable duct (15) is used to introduce alumina and / or ground bath in the electrolysis cell, so as to reform a coating layer, after the establishment of a new anode.
- the breaker (11a), the bucket shovel (12a) and the anode clamp (13a) are typically mounted at the lower end of a positioning member (Hb, 12b, 13b), such as a mast or a telescopic arm.
- a positioning member Hb, 12b, 13b
- the expression “anode handling tool” (13) denotes the assembly comprising an anode gripping member (13a) and a positioning member (13b).
- the service machine (6) comprises at least one anode handling tool (13) provided with a positioning member (13b), a gripping member (13a) and a vertical position sensor (13c) of the gripping member.
- the method of changing an anode of an electrolytic aluminum production cell (2) having a plurality of anodes (20, 20 ') typically comprises the following basic steps:
- a service machine is placed near the determined spent anode (20 ');
- the covers (36) are removed near the worn anode (20 '); the moving frame (23) to which the anodes (20, 20 ') are fixed;
- the metal rod of the spent anode (20 ') is grasped with the aid of an anode handling tool (13), and more precisely with the aid of a gripping member (13a);
- the used anode (20 ') is removed from the electrolysis cell by means of said handling tool (13);
- the used anode (20 ') is deposited in a determined location; - It takes a replacement anode (20 ") with a handling tool (13), usually the same tool that used to handle the used anode;
- the replacement anode (20 ) is fixed on the mobile frame (23) by means of a mechanical fixing means (24).
- a vertical position is determined for the replacement anode (20 ") by means of measurements made during the handling of the anodes, These measurements relate, firstly, to the position of the tool. anode handling and, secondly, the passage of the anodes through a given axis or a specific plane outside the electrolysis cell.To this end, on the one hand, we create an axis or a plane immaterial reference, delimited by sound or electromagnetic waves, and the passage of the anodes through this axis or this plane is detected by means of a sound or electromagnetic wave detection system.
- an anode handling tool (13) comprising a vertical position sensor (13c) of the gripper (13a), and measuring the movements of the gripper during the anode handling operations.
- the vertical position of the replacement anode from the measurements of movement of the gripping member at predetermined times, namely the taking of the spent anode, the passage of the spent anode through the determined axis or plane and the passage of the replacement anode through the axis or plane determined.
- At least one sonic or electromagnetic wave beam (51) is produced in a given axis or a determined reference plane (50) (FIG. 4);
- an anode handling tool (13) comprising a vertical position sensor (13c) of the gripping member (13a) at a determined spent anode (20 ') and placing a gripping member (13a) in the gripping position of the metal rod (22 ') of this anode (20') ( Figure 4); the metal rod (22 ') of a given spent anode (20') is grasped by means of the gripping member (13a) of an anode handling tool (13) and, at the using the position sensor, measuring a first vertical distance A traveled by the gripping member ( Figure 4); the mechanical fastener (24) of the spent anode (20 ') is defeated, the used anode (20') is removed from the electrolysis cell by means of said handling tool (13), the anode block (s) (21 ') of this anode through said beam in a vertical movement and, with the aid of said position sensor, measuring a second vertical distance B traveled by the member gripping at the moment when the reference surface (21a 1 ) of the
- the metal rod (22 ") of a replacement anode (20") is grasped by means of a gripping member (13a), the anode block (s) are passed through ( 21 ") of said anode through said beam in a vertical movement and, with the aid of said position sensor, measuring a third vertical distance C traversed by the gripping member at the moment when the reference surface (2Ia") anode passes through said beam ( Figure 6);
- the vertical position of the replacement anode (20 ") in the cell is determined from the values obtained for said first, second and third distances traveled (A, B and C), and the replacement anode is placed ( 20 ") at this vertical position in the location initially occupied by the spent anode (FIG.
- the replacement anode (20 ) is fixed on the mobile frame (23) by means of a mechanical fixing means (24).
- Said distance measurements can be made during normal operations of replacing worn anodes.
- the invention thus makes it possible to substantially limit the handling operations required to determine the position of the replacement anode.
- the same gripping member (13a) is used to handle a determined spent anode (20 ') and the replacement anode (20 ") intended to replace it.
- This variant makes it possible to avoid a calibration of the sensors. separate tools and differences in distance measurement inherent in the use of separate tools.
- the used anode (20 ') is deposited in a determined location before the metal rod (22 ") of the replacement anode (20") is gripped with the gripping member (13a).
- Said first distance (A) can be measured before or after grasping the rod (22 ') of the spent anode (20'). This distance is preferably measured after grasping the rod (22 ') and after putting the handling tool (13) under mechanical tension, in order to make up for any mechanical play and improve the accuracy of the measurement.
- the reference surface (21a, 21a ', 21a ") of the anodes is preferably the so-called" lower "surface of the anode block (s) (21, 21', 21").
- said vertical distance B is preferably measured during a downward movement of a spent anode (20 '), typically during the deposition of the anode in the determined location, which is usually a pallet or a vehicle (40, 40 ') for its evacuation.
- said beam is disposed at a predetermined height above said determined location.
- said vertical distance C during an upward movement of a replacement anode (20 "), typically during the removal of the anode of a temporary storage place, which is usually a pallet or vehicle (40, 40 ") used for its supply.
- said beam is disposed at a predetermined height above said storage location.
- the vertical position of a replacement anode (20 ") corresponds to a vertical distance A 'traveled by the gripping member (13a) during the placement of the replacement anode in the location initially occupied by a
- a 'traveled by the gripping member 13a
- the worn anodes (20 ') are replaced one by one by replacement anodes (20 ").
- At least two worn anodes (20 ') are replaced at a time by replacement anodes (20 ")
- said distances A, B and C are measured.
- This embodiment of the invention is advantageously implemented by using a service machine (6) comprising a number of anode handling tools (13) at least equal to the number of worn anodes which are replaced simultaneously.
- the position sensor (13c) is used to measure the distance traveled vertically by the gripping member (13a) during handling of anodes.
- the distances are given with respect to a reference level N, which may be arbitrary.
- the reference level N is preferably the same for all the distance measurements during the same anode change in order to simplify the calculations and to avoid introducing uncertainties in the determination of the final position of the anode. of substitution.
- the position sensor (13c) may be, for example, a cable encoder or a laser range finder.
- the position sensor is advantageously integrated with the anode handling tool (13).
- the position sensor (13c) is rigidly attached to the fixed part of the positioning member (13b) of the anode handling tool (13); it makes it possible to measure the relative distance of a determined point integral with the gripping member.
- the position sensor can be attached to the sliding arm or telescopic mast which is fixed the gripping member.
- anode handling tool (13) with a means for measuring the tension in the tool, such as an axial dynamometer, which makes it possible to know the moment when the kinematic chain of the tool is in tension and to determine the moment when the mechanical games are all taken in the same direction.
- Said sound waves are typically ultrasonic waves.
- the electromagnetic waves are typically visible light, infrared or radio waves. It is advantageous to generate said beam (51) using a laser.
- the lower surface (21a, 21a ', 21a ") of the anodes, in particular worn anodes, may have irregularities resulting in particular from surface defects, irregular wear of the anodes or deposits of material (such as alumina) when using the anodes
- two or more (typically three) are preferably generated.
- This variant of the invention is typically implemented with the aid of a generator comprising two or more sources of sound or electromagnetic waves, that is to say that each beam (51) is generated by a source of distinct waves (in the case of electromagnetic waves, each source is typically a laser).
- the distances traveled (B and C) are advantageously given by the average of the distances traveled measured for each beam (after possibly eliminating one or more values deemed aberrant).
- Said determined axis or the determined reference plane (50) is preferably substantially horizontal.
- the angle between the horizontal and said determined reference axis or plane (50) is preferably less than about 10 °, and more preferably less than about 5 °.
- FIG. 8 there is a sound or electromagnetic wave detector (54) facing a sound or electromagnetic wave beam generator (52). ) so that the detector can detect the beam produced by the generator ( Figure 8a).
- the method according to the invention can be implemented using a measuring system comprising a position sensor (13c) for measuring the vertical distances traveled by a gripping member (13a) of a handling tool. 'anode
- a sound or electromagnetic wave beam generator capable of producing at least one sound or electromagnetic wave beam (51) in a given axis or reference plane (50), at least one sound or electromagnetic wave detector (54) adapted to detect the passage of a determined part (21a,
- the position sensor (13c) is preferably integrated with the anode handling tool
- the generator (52) typically includes a source for each sound or electromagnetic wave beam (52).
- the generator advantageously comprises at least one laser.
- the or each positioning member (53) of the measuring system is, directly or indirectly, attached to or placed on a traffic lane (3).
- the measurement system is integrated with a service unit (4) for anode change operations. This embodiment of the invention facilitates the movement and positioning of the measuring system. It also makes it possible to carry out the measurements necessary for the positioning of a replacement anode during normal handling movements of a used anode and a replacement anode.
- the measuring system according to the invention is preferably integrated in the service machine (6) of said service unit (4), and more preferably in the module (8) of said service machine (6).
- the vertical position sensor (13c) of the gripping member (13a) of the measuring system is typically that which is provided with the anode handling tool (13).
- the or each positioning member (53) of the measuring system is, directly or indirectly, fixed to a service unit (4), to a service machine (6) or to a service module (8) .
- the or each positioning member (53) of the measuring system is typically an arm or a telescopic mast.
- the generator (52) and / or the detector (54) are typically fixed in the lower part of the positioning member (53).
- the measurements of distance traveled can be carried out with or without the intervention of an operator.
- the detector may emit an electrical, light or sound signal when the determined reference surface of an anode passes through the said beam (s) and an operator can record the distance value traveled by the gripping member given by the sensor. position at the time of transmission of said signal. Determining the distance A 'corresponding to the position of the replacement anode can also be performed by an operator using the values obtained for the first, second and third distances traveled (A, B and C).
- the measurement of said distances (A, B, C, A ') is advantageously carried out wholly or partly in a computer manner.
- the passage of the reference surface (21a, 21a ', 21a ") of the anodes through said beam can electrically or electronically trigger the measurement of the position sensor and the recording of the corresponding distance.
- the measuring system advantageously comprises a device for recording the measurements made and for determining said vertical position of the replacement anode (20 ").
- the generator (52) and the detector (54) can be located on the same positioning member (53) or on separate positioning members.
- the generator (52) and detector (54) may optionally be integrated in the same device.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- 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 |
---|---|---|---|
US60775604P | 2004-09-08 | 2004-09-08 | |
FR0409508A FR2874934B1 (fr) | 2004-09-08 | 2004-09-08 | Procede de changement d'anode dans une cellule de production d'aluminium par electrolyse incluant un ajustement de la position de l'anode et dispositif pour le mettre en oeuvre |
PCT/FR2005/002188 WO2006030092A2 (fr) | 2004-09-08 | 2005-09-02 | Procédé de changement d'anode dans une cellule de production d'aluminium par électrolyse incluant un ajustement de la position de l'anode et dispositif pour le mettre en oeuvre |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1819847A2 true EP1819847A2 (fr) | 2007-08-22 |
EP1819847B1 EP1819847B1 (fr) | 2017-11-29 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05800606.5A Active EP1819847B1 (fr) | 2004-09-08 | 2005-09-02 | Procédé de changement d'anode dans une cellule de production d'aluminium par électrolyse incluant un ajustement de la position de l'anode et dispositif pour le mettre en oeuvre |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1819847B1 (fr) |
AR (1) | AR054403A1 (fr) |
AU (1) | AU2005284068B2 (fr) |
BR (1) | BRPI0515060A (fr) |
CA (1) | CA2577921C (fr) |
RU (1) | RU2375502C2 (fr) |
WO (1) | WO2006030092A2 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2902113B1 (fr) * | 2006-06-09 | 2008-08-08 | Ecl Soc Par Actions Simplifiee | Procede de mesure a la volee de la hauteur d'une anode d'electrolyse |
CN102400184B (zh) * | 2011-11-22 | 2014-05-07 | 中国铝业股份有限公司 | 一种实现铝电解槽精确换极的方法 |
CN102400181B (zh) * | 2011-11-22 | 2014-05-28 | 中国铝业股份有限公司 | 一种更换铝电解槽电极的方法 |
FR3016891B1 (fr) * | 2014-01-27 | 2017-08-04 | Rio Tinto Alcan Int Ltd | Dispositif de stockage d'une charge au-dessus d'une cuve d'electrolyse. |
EP4293141A1 (fr) | 2022-06-13 | 2023-12-20 | Dubai Aluminium PJSC | Ensemble d'entretien d'anode pour une installation d'électrolyse d'aluminium et ses procédés de fonctionnement |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5549682B2 (fr) * | 1974-04-05 | 1980-12-13 | ||
DE2819351A1 (de) * | 1978-04-03 | 1979-10-04 | Alusuisse | Verfahren zum einmessen von auszuwechselnden elektroden, anordnung zur ausfuehrung des verfahrens sowie detektor zur registrierung des erreichers einer vorgegebenen position |
US4540474A (en) * | 1984-06-04 | 1985-09-10 | Aluminum Company Of America | Light level electrode setting gauge and method of use |
NO162975C (no) * | 1987-12-30 | 1990-03-14 | Norsk Hydro As | Fremgangsmaate for setting av elektroder i elektrolyseceller. |
US5152408A (en) * | 1988-05-18 | 1992-10-06 | Hans Tax | Container crane installation |
US7001497B2 (en) * | 2003-04-25 | 2006-02-21 | Alcoa,Inc. | Process and apparatus for positioning replacement anodes in electrolytic cells |
-
2005
- 2005-09-02 BR BRPI0515060-4A patent/BRPI0515060A/pt not_active IP Right Cessation
- 2005-09-02 EP EP05800606.5A patent/EP1819847B1/fr active Active
- 2005-09-02 AU AU2005284068A patent/AU2005284068B2/en not_active Ceased
- 2005-09-02 CA CA2577921A patent/CA2577921C/fr not_active Expired - Fee Related
- 2005-09-02 RU RU2007112948/02A patent/RU2375502C2/ru not_active IP Right Cessation
- 2005-09-02 WO PCT/FR2005/002188 patent/WO2006030092A2/fr active Application Filing
- 2005-09-06 AR ARP050103722A patent/AR054403A1/es not_active Application Discontinuation
Non-Patent Citations (1)
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See references of WO2006030092A2 * |
Also Published As
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CA2577921C (fr) | 2014-05-27 |
WO2006030092A3 (fr) | 2006-12-07 |
AR054403A1 (es) | 2007-06-27 |
BRPI0515060A (pt) | 2008-07-01 |
WO2006030092A8 (fr) | 2007-04-05 |
EP1819847B1 (fr) | 2017-11-29 |
CA2577921A1 (fr) | 2006-03-23 |
AU2005284068B2 (en) | 2010-07-29 |
RU2007112948A (ru) | 2008-10-20 |
WO2006030092A2 (fr) | 2006-03-23 |
RU2375502C2 (ru) | 2009-12-10 |
AU2005284068A1 (en) | 2006-03-23 |
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