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Electrolytic cell for production of aluminium and method for maintaining crust on sidewall and recovering electricity

A technology of electrolytic cell and hard shell layer, applied in the field of electrolytic cell, to achieve the effects of good efficiency, increased fluoride content, and increased average lifespan

Inactive Publication Date: 2005-05-11
ELKEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even with proper design of the sidewall liner, it is impossible to obtain and maintain a thin stable layer of the solidification cell on this sidewall liner due to variations in electrolyte composition and other processes not under the control of the operator Variety

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  • Electrolytic cell for production of aluminium and method for maintaining crust on sidewall and recovering electricity
  • Electrolytic cell for production of aluminium and method for maintaining crust on sidewall and recovering electricity
  • Electrolytic cell for production of aluminium and method for maintaining crust on sidewall and recovering electricity

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Embodiment Construction

[0037] exist figure 1 The electrolytic cell used for the production of aluminium is shown in . The electrolytic cell comprises an electrolytic cell 2 with an outer casing 3 made of steel. In the bottom of the steel casing 3 is arranged a carbon block 4 connected to electrical terminals (not shown), which carbon block constitutes the cathode of the electrolytic cell. The anode 5 is arranged above and spaced apart from the carbon block 4 . The anode 5 is preferably a pre-baked carbon anode block or a self-baked carbon anode, also known as a Soderbergh self-baking anode. Anodes 5 cantilever from above and are connected to electrical terminals in a conventional manner (not shown).

[0038] Inside the steel casing 3, a layer of insulating refractory material 6 is arranged on the side walls of the electrolytic cell, and on the inside of this layer of insulating refractory material 6, an evaporative cooling plate 7 facing the inside of the electrolytic cell is arranged. The evapo...

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Abstract

The invention relates to an electrolytic cell for the production of aluminium, comprising an anode and an electrolytic cell, wherein the electrolytic cell comprises a casing made of steel and a carbon block in the bottom of the cell forming the cathode of the electrolytic cell. At least a portion of the side wall of the electrolytic cell comprises one or more evaporatively cooled plates, and wherein a high temperature, heat resistant and insulating material is disposed between the evaporatively cooled plates and the steel shell. The invention also includes a method for maintaining the encrustation on the side walls of the slot and for recovering heat from the cooling medium within the plate for conversion into electrical energy.

Description

technical field [0001] The present invention relates to an electrolytic cell for the production of aluminum, a method for maintaining a hard shell on the side walls of an electrolytic cell for the production of aluminum, and a method for recovering electricity from an electrolytic cell for the production of aluminum method. Background technique [0002] Aluminum is produced in an electrolytic cell comprising an electrolytic cell with a cathode and an anode, the anode being a self-baked carbon anode or a plurality of pre-baked carbon anodes. Alumina is supplied to a cryolite-based electrolyte in which it dissolves. During electrolysis, aluminium is produced at the cathode and forms a layer of molten aluminium on the bottom of the electrolysis cell, on top of which the cryolite electrolyte floats. CO gas is generated at the anode, causing the consumption of the anode. The operating temperature of the cryolite electrolyte is normally about 920 to about 950°C. [0003] The e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/08
CPCC25C3/08C25C3/085
Inventor J·A·奥尼K·约翰森P·O·诺斯
Owner ELKEM
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