Aluminium electrolytic reduction cell linings

Details Aluminium electrolytic reduction cell linings Aluminium electrolytic reduction cell linings

1984-06-06

1987-03-03

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204291, C25C 308, C25B 1104

Patent

active

046473572

ABSTRACT:
The invention concerns cells for production of Al by electrolysis of an alumina-containing electrolyte based on cryolite and having a lining based on alumina for containing the electrolyte. A layer containing an alkali or alkaline earth metal compound, e.g. sodium aluminate, is included in the lining, preferably around the 880.degree. C. isotherm when the cell is in operation. On penetration of the lining by the electrolyte, the compound dissolves in or reacts with the electrolyte so as to raise the solidus and reduce or prevent further penetration.

REFERENCES:
patent: 3457158 (1969-07-01), Bullough
patent: 3723286 (1973-03-01), Hunt et al.
patent: 4033836 (1977-07-01), Holmes
patent: 4175022 (1979-11-01), Vadla et al.
patent: 4383910 (1983-05-01), Richards
patent: 4411758 (1983-10-01), Hess et al.
patent: 4430187 (1984-02-01), Snaelund et al.

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