Linings for aluminum reduction cells

Details Linings for aluminum reduction cells Linings for aluminum reduction cells

1988-07-13

1989-10-31

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204294, 204243M, 266280, 501153, C25C 308, C21B 704, C04B 3510

Patent

active

048775070

ABSTRACT:
The amount of electrically conductive material in the bottom floor lining of a conventional aluminum reduction cell is reduced by using a non-conductive lining material in its place. The non-conductive material separates the remaining electrically conductive regions form the sidewall linings of the cell and preferably confines the electrically conductive material to the "anode shadow" region of the cell floor. The non-conductive material preferably comprises a particulate alumina mixture made up of large shapes which firmly compact together and smaller particles which fill the remaining voids. Optionally, the mixture may be bonded together with amorphous alumina, in which case the mixture can also be used for cell wall linings. The linings can be used in reduction cells of conventional design and reduces undesirable magnetohydrodynamic effects as well as pollution hazards caused by conventional carbonaceous cell linings.

REFERENCES:
patent: 3580835 (1971-05-01), Peterson
patent: 3723287 (1983-03-01), Elliott
patent: 3960696 (1976-06-01), Wittner
patent: 4376690 (1983-03-01), Kugler
patent: 4392925 (1983-07-01), Alder et al.
patent: 4612103 (1986-09-01), Dewing et al.
patent: 4613418 (1986-09-01), Dewing et al.
patent: 4737254 (1988-04-01), Gesing et al.

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