ELECTROLYTIC CELL FOR PRODUCTION OF ALUMINIUM Russian patent published in 2017 - IPC C25C3/12 

FIELD: electricity.

SUBSTANCE: electrolytic cell contains a body with side and bottom lining, the end anodes and cathodes, located on the opposite sides of the electrolytic cell body and vertically installed between them non-consumable bipolar electrodes, while non-consumable bipolar electrodes forming the electrolysis modules are installed along the electrolytic cell axis in rows, the corundum power and aluminium collection modules are located between. The electrolytic cell side and bottom lining is made of corundum containing material and is covered with the layer of deep calcined alumina, and the corundum power module is separated from the aluminium collection module by the slab from fire-resistant, non-conductive material, for example, silicon carbide or aluminium nitride. The bipolar electrodes can be installed at the angle to the vertical not more than 10°. The end faces of the bipolar electrodes from the corundum power module side are protected by the coating from refractory, non-conductive material, for example, silicon carbide or aluminium nitride.

EFFECT: improvement of the bipolar electrodes with corundum supply, reduction of the dissolution rate of the electrodes anode part and the labour costs for maintaining the electrolytic cell, provision of the stable and long-term operation of bipolar electrodes and the production of commercial pureness aluminium.

4 cl, 1 dwg