ELECTROLYSIS UNIT FOR ALUMINIUM MANUFACTURE Russian patent published in 2012 - IPC C25C3/08 

FIELD: metallurgy.

SUBSTANCE: invention refers to design of electrolysis unit for aluminium manufacture. Electrolysis unit includes cathode device - bath lined with carbon blocks, molten aluminium layer arranged at carbon bottom and serving as cathode, which is connected to cathode bus, and pre-baked carbon anodes connected to anode bus, which are arranged in upper part of bath and submerged into molten electrolyte. Inside electrolysis unit bath there located are bipolar electrodes parallel to its longitudinal axis, between carbon bottom and baked anodes, under each of baked anodes. Electrodes are located at distance of 1-3 cm from surface of molten aluminium providing free removal of gas bubbles and minimum excitation of molten electrolyte surface and are made from low consumable materials in molten layers. Electrodes are arranged on skids from refractory electrically non-conducting material, for example silicone carbide, which are fixed at bath bottom. Active cathode surface of bipolar electrode faces lower surface of baked carbon anode. Active anodic surface of bipolar electrode faces surface of molten aluminium. Surface area of bipolar electrode is not less than surface area of lower surface of baked carbon anode.

EFFECT: providing efficiency rise without increasing geometrical dimensions of electrolysis units.

2 cl, 1 dwg