Cell for fused-salt electrolysis

C - Chemistry – Metallurgy – 25 – C

Patent

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204/142, 204/209

C25C 7/00 (2006.01) C25C 3/10 (2006.01) C25C 3/22 (2006.01)

Patent

CA 1066661

ABSTRACT OF THE DISCLOSURE: A cell for fused-salt electrolysis for reducing alumina in the presence of cryolite to metallic aluminum, comprising an insulated tank, which has a carbon bottom, two rows of anode rods, which are disposed on opposite sides of an anode carrier, which is arranged in the longitudinal center plane, an exhaust gas-collecting duct extending at the longitu- dinal center between the two rows of anode rods, and two covers, which are downwardly inclined from the outside of respective rows of anode rods to respective edges of the tank and which are provided each at its outer longitudinal edge and at each of its transverse edges with a skirt that extends as far as to the respective edge of the tank. In this cell each cover is hinged adjacent to its longitudinal edge adjacent to the anodes and at least at its corner portions to a support which extends along the row of anode rods, a carrying arm is firmly secured to each end portion of said support, the carrying arm is pivoted at its other end to the anode carrier and is connected by an operating linkage to a piston rod of a cylinder of a hydraulic or pneumatic actuator, a cylinder of a hydraulic or pneumatic actuator is pivoted to said support at least adjacent to the middle thereof, and the piston rod of the last-mentioned actuator engages the cover. This electrolyc cell can be operated in a simple manner by a manipulator; the molten material can be removed without obstruction and the anode can be replaced without difficulties.

245571

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