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Method of changing an anode of a cell for the production of aluminium by means of electrolysis, including an adjustment of the position of the anode, and device for performing same

An electrolytic cell and anode technology, applied in the direction of electrolytic components, electrolytic process, etc., can solve the problems of reducing the efficiency of the collection device, prolonging the duration of the maintenance cycle of the electrolytic cell, etc., and achieve the effect of avoiding the opening time and prolonging the opening time

Inactive Publication Date: 2012-12-12
E-CL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The time spent on these operations significantly increases the duration of cell maintenance cycles, as well as the time the cell cover is open, which reduces the efficiency of the collection devices used to collect the effluent generated by the cell

Method used

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  • Method of changing an anode of a cell for the production of aluminium by means of electrolysis, including an adjustment of the position of the anode, and device for performing same
  • Method of changing an anode of a cell for the production of aluminium by means of electrolysis, including an adjustment of the position of the anode, and device for performing same
  • Method of changing an anode of a cell for the production of aluminium by means of electrolysis, including an adjustment of the position of the anode, and device for performing same

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no. 1 approach

[0074] The moment at which the reference surface (21a', 21a") of the anode crosses said beam can be determined in different ways. According to an advantageous embodiment which is easily computerized, said beam is generated with an acoustic or electromagnetic wave generator (or transmitter) , and detect the beam with a detector (or receiver). According to Figure 8 In a first embodiment of this embodiment shown schematically, the acoustic or electromagnetic wave detector (54) is positioned opposite the acoustic or electromagnetic wave beam generator (52) such that the detector detects The resulting beam ( Figure 8 a). The moment the reference surface (21a', 21a") of the anode (20', 20") passes through the beam is detected when the anode block (21', 21") interrupts the propagation of the beam to the detector ( Figure 8 b).

[0075] according to Figure 9 In another embodiment of this embodiment schematically shown, the acoustic or electromagnetic wave detector (54) and the...

Embodiment approach

[0076] according to Figure 10 In yet another embodiment of this embodiment shown schematically, the acoustic or electromagnetic wave detector (54) and the acoustic or electromagnetic wave beam generator (52) are positioned such that the detector detects the Block (21', 21") reflects the beam ( Figure 10 a). The reference surface (21a', 21a") of the anode (20', 20") that passes through said beam is detected when the anode block (21', 21") reflects all or part of said beam to the detector time( Figure 10 b). Tests have shown that the reflectivity of the surface of new or spent anodes is sufficient to implement this scheme satisfactorily. The advantage of this embodiment is that it allows the detector and generator to be easily placed together on the same positioning device (53).

[0077] The method of the present invention can be implemented with a measuring system comprising: a position sensor (13c) for measuring the vertical distance traveled by the gripping device (13...

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Abstract

The invention relates to a method of changing an anode of a cell for the production of aluminium by means of fused-salt electrolysis (2), said cell comprising a plurality of anodes (20, 20'). The inventive method comprises the following steps consisting in: (i) using at least one anode handling tool (13) comprising a positioning member (13b), a gripping member (13a) and a vertical position sensorfor grip member and using said position sensor in order to measure the distances travelled vertically by the gripping member (13a) in relation to a reference level N; and (ii) producing at least one electromagnetic or sound wave beam (51) in an axis or a determined reference plane (50) and using the passage of the anode through said beam in order to measure the aforementioned distances. The method also consists in determining the vertical position of the replacement anode in the cell from the values obtained for said distances and placing the replacement anode in said position in the locationinitially occupied by the used anode (20').

Description

technical field [0001] The present invention relates to the Hall-Heroult process of aluminum smelting by molten bath electrolysis, and in particular to anode replacement in aluminum smelting plants and a multifunctional crane for anode replacement. Background technique [0002] Aluminum is produced industrially by molten bath electrolysis in electrolytic cells according to the well-known Hall-Heroud process. French patent application FR 2806742 (corresponding to US patent No. 6409894) describes the installation of an electrolytic plant for smelting aluminum. [0003] According to the most common technique, the electrolytic cell has a plurality of "prebaked" anodes made of carbonaceous material, which are consumed during the electrolytic reduction reaction of aluminum. The progressive consumption of the anodes necessitates maintenance of the electrolytic cell, in particular the replacement of spent anodes with new ones. [0004] In order to limit disturbance to the operatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/06C25C7/06
Inventor A·范·阿克P·马奇安迪
Owner E-CL