Thermal shock protection for electrodes

Details Thermal shock protection for electrodes Thermal shock protection for electrodes

C - Chemistry, Metallurgy

25

C

204/142

C25C 7/00 (2006.01) C25C 1/02 (2006.01) C25C 3/06 (2006.01) C25C 3/08 (2006.01)

Patent

CA 1146121

Abstract of the Disclosure Method and apparatus for protecting electrodes of an electrolytic cell from thermal shook when the temperature of the cell is raised from temperature to an elevated operating temperature. For aluminium electrolysis at about 950°C. a cavity in each cathode is filled with a metal plug, preferably a solid plug of 33.2% Cu-Al alloy. A portion of each cathode protruding into a chamber of the cell is provided with a sleeve of insu- lating material, preferably expanded fibrous kaolin. A heat dispersing means encircles each cathode radially outwardly thereof. A preferred form of the heat dispersing means is a stainless steel jacket located externally of the insulating material sleeve. After the cell is heated, the chamber is filled with a bath, and electrolysis is established.

359022

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