LINING OF CATHODE ASSEMBLY OF ELECTROLYSIS CELL FOR PRODUCING ALUMINIUM

• Main Authors: SBITNEV, Andrej Gennad'evich, PROSHKIN, Aleksandr Vladimirovich, PINGIN, Vitalij Valer'evich, ZHERDEV, Aleksej Sergeevich, SHTEFANYUK, Yuriy Mikhailovich, NAGIBIN, Gennadij Efimovich, MANN, Viktor Khrist'yanovich
• Format: Patent
• Language: English; French; German
• Published: 26.04.2023
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS

The invention relates to the field of non-ferrous metallurgy, particularly to the electrolytic production of aluminium, and more specifically to the design of a cathode assembly of an electrolysis cell for producing aluminium. The lining of a cathode assembly of an aluminium electrolysis cell is proposed, in which a thermally-insulating layer and a fire-proof layer consist of at least two sublayers, wherein the porosity of the thermally-insulating layer and of the fire-proof layer increases from an upper sublayer to a lower sublayer, and the ratio of the thicknesses of the fire-proof layer and the thermally-insulating layer is at least 1/3. A method for lining a cathode assembly of an electrolysis cell, and an electrolysis cell with the proposed cathode assembly lining is also proposed. The invention makes it possible to reduce the content of cyanides in the upper layers of the thermal insulation and to provide the conditions for reuse of the material for the thermally-insulating layer, and also to reduce the amount of waste and improve the ecological situation in areas in which aluminium-producing plants are situated.