PROCEDURE FOR PROCESSING SOLID FLUORINE-CARBON-CONTAINING WASTE OF ELECTROLYTIC PRODUCTION OF ALUMINIUM

摘要

FIELD: metallurgy. ^ SUBSTANCE: solid fluorine-carbon-containing waste is treated with water solution of caustic alkali of concentration 25-35 g/dcm3 at temperature 60-90C. Further, product is separated to deposit and solution with successive supply of solution into production of fluoric salts. Upon leaching deposit is treated with 1.0-1.5% water solution of organic acid at temperature 60-80C and product is separated to deposit and solution. Solution is directed to production of fluoric salts, while carbonic deposit is directed to production of carbon containing products. Ratio L:S is preferably maintained as 10:1 at treatment of waste with solution of caustic alkali, while oxalic acid can be used as organic acid. ^ EFFECT: extraction of valuable components from waste. ^ 3 cl, 1 tbl, 2 ex