Sub-cathodic shield with deformable zones for Hall-Heroult elect

Details Sub-cathodic shield with deformable zones for Hall-Heroult elect Sub-cathodic shield with deformable zones for Hall-Heroult elect

1984-05-14

1984-12-18

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204279, C25C 308, C25C 700

Patent

active

044889550

ABSTRACT:
A subcathodic shield for use with Hall-Heroult electrolysis cells. The shield, which is located below the carbonaceous blocks which make up the cathode, and above the cell housing, comprises at least one continuous steel sheet at least 5 mm thick extending substantially over the total area between the base of the cathode and the base of the housing, and which has at least one deformable zone for absorbing thermal stresses caused by differences in temperatures between the shield section situated below the central area of the cathode and the shield section situated below the peripheral areas of the cathode.

REFERENCES:
patent: 2861036 (1958-11-01), Simon-Suisse
patent: 3494851 (1970-02-01), Cauvin, Jr.
patent: 4175022 (1979-11-01), Vadla et al.
patent: 4322282 (1982-03-01), Jemec
patent: 4430187 (1984-02-01), Snaeland et al.

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