Tank for an electrolytic cell

Details Tank for an electrolytic cell Tank for an electrolytic cell

1980-10-08

1982-03-30

Gantz, Delbert E.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 67, C25C 310

Patent

active

043222820

ABSTRACT:
During its continuous use, the carbon lining on cells used in the electrolysis of aluminum oxide frequently exhibits cracks which are formed by stresses due to the thermal dilation of the contents of the cell. The present invention prevents the formation of cracks by providing in the floor and corner regions of the tank grooves (protrusions, doming, bulging) which can be deformed elastically so as to yield to the pressure caused by the dilation until the forces on the cell walls are equalized. Also provided are horizontal, movable hollow sections, secured to the sidewalls of the metal tank. The sections bend as a result of the temperature gradient across them such that they counter the pressure on the sidewalls due to the dilation of the cell contents. This effect can be amplified by providing holes in the walls of the hollow section so as to reduce thermal conduction within the sections and thereby maintain the temperature gradient therein. The effect can be amplified by making the hollow sections out of two materials having different thermal expansion coefficients.

REFERENCES:
patent: 3421995 (1969-01-01), Morel et al.
patent: 3582483 (1971-06-01), Sem
patent: 4087345 (1978-05-01), Sandvik et al.
patent: 4093524 (1978-06-01), Payne

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