METHOD FOR PROTECTING CARBON-GRAPHITE HEARTH OF ALUMINIUM ELECTROLYSER Russian patent published in 2017 - IPC C25C3/20 

FIELD: metallurgy.

SUBSTANCE: method involves the formation of an electrical resistance layer on the anode projection bottom, the release of the starting material into the space "board-anode" and the inclusion of the series current. The electrical resistance layer is formed from a batch containing coke, lithium carbonate and crystalline silicon, after the formation of the layer, baking is carried out at a temperature of 950 to 970°C.

EFFECT: reducing the negative effects associated with the adsorption and penetration of sodium into the carbon-graphite lining during the cell start-up phase, increasing the resistance and strength of the carbon-graphite liner, increasing the cell life and productivity, improving the grade of the aluminium produced, and reducing power consumption.

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