Heat-resistant concrete for collector bars of aluminum reduction сells insulation

In aluminium reduction technology it’s possible to reduce energy consumption and increase current efficiency by decreasing anode-cathode distance and horizontal currents in molten aluminium. Horizontal currents can be decreased by replacing insulation between cathode carbon block and collector bar in area of “ledge border - anode periphery projection on lining”. As an insulator it’s technologically and economically preferable to use refractory concrete which have good adhesion to steel, and chemical resistance against cryolite-alumina melt, sufficiently low compressive strength, which prevents cathode carbon block destruction in case of insulator volume expansion due to electrolyte attack. Results of the refractory concrete properties studies results in order to select the optimal bar’s insulator material composition are presented.