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Electrolytic cell, in particular for producing aluminum, having a tub-shaped cathode

An electrolytic cell and cathode technology, applied in the field of electrolytic cells, can solve problems such as high resistance

Inactive Publication Date: 2014-07-30
SGL CARBON SE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a given material, longer electrical paths have higher resistance than shorter electrical paths

Method used

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  • Electrolytic cell, in particular for producing aluminum, having a tub-shaped cathode
  • Electrolytic cell, in particular for producing aluminum, having a tub-shaped cathode
  • Electrolytic cell, in particular for producing aluminum, having a tub-shaped cathode

Examples

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Embodiment Construction

[0049] figure 1 A perspective view of a cathode 10 of an electrolytic cell according to one embodiment of the invention is shown.

[0050] The cathode 10 consisting of a carbonaceous material has an upper side 12 on which the liquid aluminum layer of the electrolytic cell is arranged during operation of the electrolytic cell, for example according to the Hall-Eru process. In practice, the cathode 10 consists of a plurality of cathode blocks arranged side by side as viewed in the longitudinal direction y of the cathode, wherein the longitudinal directions of the individual cathode blocks each extend in the width direction x of the cathode 10 . exist figure 1 Bus bars, not shown, contact the cathode 10 in a current feed from the lower side 14 of the cathode and are conductively connected to at least one external current feed. Here preferably, each busbar is inserted into a groove, which is provided in each cathode block and extends in the width direction x of the cathode 10, t...

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Abstract

The invention relates to an electrolytic cell, which is particularly suitable for producing aluminum. The electrolytic cell comprises a cathode, a layer of liquid aluminum arranged on the top side of the cathode, a melt layer on top thereof, an anode above the melt layer, at least one and preferably at least two bus bars that contact the cathode from the bottom side of the cathode in a current-supplying manner, and at least one external current supply, wherein each of the at least one external current supply is connected in an electrically conductive manner to at least one respective and preferably at least two respective bus bars at a respective connection point; the top side of the cathode is tub-shaped as viewed in the cross-section of the cathode; the tube has two edge regions and a bottom region which is arranged between the edge regions and lowered relative to the edge regions as viewed in the width direction of the cathode; a respective side wall region is provided between each edge region and the bottom region; and the side wall region connects the respective edge region and the bottom region, wherein i) the width of at least one of the bottom region and the edge regions varies over the length of the cathode, and / or ii) the height of the top side of the cathode determined from the bottom side of the cathode varies over the length of the cathode.

Description

technical field [0001] The present invention relates to an electrolytic cell, in particular for the production of aluminium, and to a cathode suitable for use in such an electrolytic cell. Background technique [0002] An electrolytic cell, for example for the electrolytic production of aluminium, industrially usually according to the Hall-Erou The process implements this electrolytic production. In the Hall-Eru process, a melt consisting of alumina and cryolite is electrolyzed. Here cryolite Na 3 [AlF 6 ], thereby lowering the melting point from 2,045°C for pure alumina to about 950°C for a mixture containing cryolite, alumina, and additives such as aluminum fluoride and calcium fluoride. [0003] The electrolytic cell used in this process comprises a cathode base which may consist of a plurality of cathode blocks which are adjacent to each other and which form the cathode. In order to withstand the thermal and chemical conditions prevailing during the operation of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08
CPCC25C3/08
Inventor 托马斯·弗罗梅尔特阿拉什·拉希迪
Owner SGL CARBON SE
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