Method of pre-heating a stack for aluminium electrolysis...

Details Method of pre-heating a stack for aluminium electrolysis... Method of pre-heating a stack for aluminium electrolysis...

2003-09-18

2009-02-03

Wilkins, III, Harry D (Department: 1795)

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Utilizing fused bath

Reexamination Certificate

active

07485215

ABSTRACT:
The present invention relates to a method of pre-heating a pot provided with anodes and cathodes for the production of aluminium by electrolysis, said method including a first step, prior to the pot being supplied with current, during which a layer of a granular conductive material is deposited then crushed between the anodes and the cathodes, characterized in that the granular conductive material is graphite-based and in that the layer of granular conductive material only extends, after crushing, over a part of a lower surface of each anode and takes the form of contact blocks.

REFERENCES:
patent: 4146444 (1979-03-01), Minick
patent: 4265717 (1981-05-01), Wiltzius
patent: 4800102 (1989-01-01), Takada
patent: 6231745 (2001-05-01), Homley et al.
patent: 6338785 (2002-01-01), De Nora
patent: 2002/0092774 (2002-07-01), Bates et al.
patent: 57123990 (1982-08-01), None
Sorlie, M. et al. (1994) ‘Cathodes in Aluminum Electrolysis’, 2nd Ed., Aluminum-verlag. p. 76-83.

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