Method for lining a cathode assembly of an electrolysis tank for producing primary aluminium (variants)

• Main Authors: Levenson, Samuil Yakovlevich, Zherdev, Aleksej Sergeevich, Sbitnev, Andrej Gennad'evich, Morozov, Aleksej Vasil'evich, Pingin, Vitalij Valer'evich, Proshkin, Aleksandr Vladimirovich
• Format: Patent
• Language: English
• Published: 06.01.2022
• 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, more particularly to technological equipment for producing primary aluminium by electrolysis, and even more particularly to methods for lining cathode assemblies of electrolysis tanks. The present method for lining a cathode assembly of an electrolysis tank for producing aluminium comprises filling a thermal insulation layer into a casing of the cathode assembly, forming a refractory layer and then compacting the layers, mounting hearth blocks and side blocks, followed by sealing the joints between them using a cold-ramming hearth paste. According to a first variant of the present invention, a resilient member made of a dense organic substance is arranged between the thermal insulation layer and the refractory layer. According to a second variant of the present invention, a flexible carbon foil is placed between the thermal insulation layer and the refractory layer, and a resilient member made of a dense organic substance is arranged below the flexible carbon foil. The proposed variants of the methods for lining a cathode assembly of an electrolysis tank for producing primary aluminium make it possible to reduce energy consumption when the electrolysis tank is in operation by virtue of the improved stabilization of the thermal properties of the thermal insulation at the base, and to extend the service life of electrolysis tanks.