Electrolysis cell and cathode with irregular surface profiling

An electrolytic cell and cathode technology, applied in the field of electrolytic cells, can solve the problems that the service life cannot be extended, reduce the specific energy consumption of the electrolytic cell, and achieve the effect of less fluctuations forming potential distribution

Inactive Publication Date: 2014-03-12
SGL CARBON SE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these electrolysers, relatively pronounced fluctuations are formed in the liquid aluminum la...

Method used

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  • Electrolysis cell and cathode with irregular surface profiling
  • Electrolysis cell and cathode with irregular surface profiling
  • Electrolysis cell and cathode with irregular surface profiling

Examples

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Embodiment Construction

[0185] figure 1 Shown is an electrolytic cell 10 for aluminum production, said electrolytic cell comprising a cathode 12, a layer 14 of liquid aluminum on top of said cathode 12, a layer 16 of melt on top of said layer of liquid aluminum, and an anode 18 located above the melt layer 16 . The liquid aluminum layer 14 and the melt layer merge into each other at the boundary surface 15 .

[0186] The cathode 12 is composed of a plurality of elongated cathode blocks, which extend along the horizontal direction y of the electrolytic cell 10, are arranged side by side along the longitudinal direction x of the electrolytic cell 10, and are connected to each other by a tamping connector not shown in the figure . Inserted into the underside of each cathode block is a busbar 20 which passes through the cathode block in its longitudinal direction y and makes electrical contact with the cathode block.

[0187] The busbars 20 are brought together by current leads 22 , which are geometri...

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Abstract

The present invention relates to an electrolysis cell, in particular for the production of aluminium, comprising a cathode, a layer of liquid aluminium on the top side of the cathode, a melt layer on top of the layer of liquid aluminium, and an anode above the melt layer, wherein the cathode has, on the top side thereof, a surface profiling formed from two or more elevations, wherein the surface profiling of the cathode is configured and arranged such that in each case one elevation is provided at at least two of the twenty points on the surface of the top side of the cathode which are arranged in each case vertically below those regions of the boundary between the layer of liquid aluminium and the melt layer at which the peaks with the twenty highest maximum values are present in the reference wave forming potential distribution at the boundary, wherein a reference wave forming potential is defined as the wave forming potential which is present at a point in the boundary between the layer of liquid aluminium and the melt layer during the operation of the electrolysis cell with, instead of the cathode with surface profiling, a reference cathode without surface profiling but of otherwise identical configuration to the cathode with surface profiling.

Description

technical field [0001] The invention relates to an electrolytic cell, especially for the production of aluminum, and to a cathode suitable for the electrolytic cell. Background technique [0002] Electrolyzers are used, for example, for the electrolytic production of aluminum, which is usually produced industrially using the Hall-Herut process. The Hall-Heruth process involves the electrolysis of a melt consisting of alumina and cryolite. Cryolite, Na 3 [AlF 6 ], used to lower the melting point of pure alumina, 2,045°C, to a mixture containing cryolite, alumina, and additives such as aluminum fluoride and calcium fluoride, to a melting point of about 950°C. [0003] The electrolytic cell used in this process comprises a cathode core made up of a number of cathode blocks arranged adjacent to each other to form the cathode. In order for the electrolyzer to withstand the thermal and chemical conditions prevailing during operation, the cathode is usually constructed of carbo...

Claims

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Application Information

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IPC IPC(8): C25C3/08C25B9/17
CPCC25C3/08
Inventor 托马斯·弗罗梅尔特弗兰克·希尔特曼
Owner SGL CARBON SE
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