METHOD OF REDUCING CONTACT VOLTAGE IN ALUMINUM ELECTROLYSIS CELL Russian patent published in 2019 - IPC C25C3/12 

FIELD: technological processes.

SUBSTANCE: invention relates to a method of reducing contact voltage in an aluminum electrolysis cell with a burnt anode. Method comprises applying a coating in the form of a solution or suspension having low electrical resistance, on elements in contact with the carbon block of the electrolysis cell, and preliminary casting of cast iron for reinforcing the contacting elements, coating is applied on nipple in place of its contact with coal part of burnt anode after cooling cast iron to temperature of 95–60 °C, with further exposure of coating for 6–12 hours, wherein between the nipple and the coal part of the anode, a copper sheet is installed or a coating is applied on the bloom, in the place of its contact with the cathode coal block, after cooling cast iron to temperature of 95–60 °C with further exposure of coating for 6–12 hours, note here that copper sheet is arranged between bloom and coal part of cathode. Coating used is a solution or an aqueous suspension of copper salts.

EFFECT: higher energy efficiency due to reduced consumption of electric energy.

4 cl, 2 dwg