CARBON BLOCKS FOR CATHODES FOR ELECTROLYTIC CELLS USED IN THE PRODUCTION OF ALUMINIUM

摘要

1336370 Carbon SUMITOMO CHEMICAL CO Ltd and KYOWA CARBON CO Ltd 19 April 1971 [16 March 1970] 23927/71 Heading C1A [Also in Division C7] A carbon block for use as cathode in an alumina electrolytic cell, produced by baking at a temp. above 2000‹ C. a raw material comprising 50% petroleum coke, has a stability constant as defined in the specification, this indicating the penetration of electrolyte into the carbon after a period of cell operation. Various examples of compositions, coke particle size and binding medium are given in the Specification.