Method and arrangement for carbothermic production of aluminum

Details Method and arrangement for carbothermic production of aluminum Method and arrangement for carbothermic production of aluminum

C - Chemistry, Metallurgy

22

B

307/16, 53/243

C22B 21/00 (2006.01) C22B 21/02 (2006.01)

Patent

CA 1121162

Abstract A method for production of aluminum and aluminum alloys by carbothermic reduction of alumina alone or in its mixtures with other oxides, comprising the steps of supplying the reducing agent carbon, and the oxide which shall be reduced, along separate paths so that the carbon is supplied by ascending motion, bringing the carbon and the oxide to meet in a zone to which elec- trical energy is supplied by electrodes, thereby maintaining a high tempe- rature in the zone and effecting the reaction between carbon and oxide, forcing the reaction gas downwards through the ascending carbon charge, thereby cooling the gas and effecting the condensation of metal vapors, liquid metal running down through the carbon charge and being collected in a receptacle located underneath the carbon charge. An arrangement for execution of the said method, comprising a vertical shaft inside which the carbon charge contained in carbon containers moves upwards and meets the oxide charged from above, electrical energy being sup- plied by electrodes extending through the oxide charge, and underneath the shaft and elongated chamber furnished with two sets of vertical columns and hoisting machinery for supporting and moving the carbon containers through horizontally so that the two columns alternate in the working position directly underneath the shaft.

332030

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