ELECTROLYSIS BATH FOR PRODUCTION OF ALLUMINIUM Russian patent published in 2011 - IPC C25C3/08 

FIELD: metallurgy.

SUBSTANCE: bath consists of jacket, of at least one cathode unit located at least partially in jacket, of at least one anode suspended above bath and immersed into upper part of electrolysis bath, and of insulation covering at least partially internal surface of jacket. Insulation is installed between the cathode unit and the jacket and is made at least partially out of blocks on base of carbon of heat conductivity below 1 Wt/m/K, preferably, below 0.3 Wt/m/K. The jacket and elements enclosed in it restrict a crucible receiving electrolysis melt in contact with the cathode unit. The blocks on base of carbon have density within ranges of 0.03 and 0.08 g/cm³, preferably, within ranges 0.1 and 0.6 g/cm³.

EFFECT: raised reliability due to elimination of destruction with melt, also due to avoiding or decrease of fluoride migration and improved heat insulation.

6 cl, 3 dwg