Chemistry: electrical and wave energy – Processes and products
Patent
1989-08-11
1991-11-05
Valentine, Donald R.
Chemistry: electrical and wave energy
Processes and products
204243R, 204243M, 204294, C25C 306, C25C 308
Patent
active
050629298
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 from 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: 3960696 (1976-06-01), Wittner
patent: 4349637 (1982-09-01), Miedanter et al.
patent: 4392925 (1983-07-01), Alder et al.
patent: 4619750 (1986-10-01), Bessard
patent: 4734182 (1988-03-01), Hvistendahl
patent: 4795540 (1989-01-01), Townsend
patent: 4877507 (1989-10-01), Hudson et al.
Allaire Claude
Gnyra Bohdan
Hudson Tom J.
McIntyre John
Tremblay Pierre
Alcan International Limited
Valentine Donald R.
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