PROCEDURE FOR PROCESSING FLUORINE-CARBON-CONTAINING WASTES OF ALUMINIUM ELECTROLYTIC PRODUCTION

摘要

FIELD: metallurgy.;SUBSTANCE: method of fluorine-carbon-containing wastes processing of electrolytic aluminium production includes wastes leaching by the caustic alkali solution with product division into residual and the solution, with futher applying the solution to the production of fluorides. Leaching of wastes is done by the caustic alkali solution with concentration of 12.6÷25.0 g/dm³ at 75÷95°C for 0.5÷4.0 hours. The residual after leaching is sent for thickening, filtration and drying to obtain the carbon product. At that the solution is returned for thickening after filtration.;EFFECT: fluorine-carbon-containing wastes recycling with high percentage of fluorine extraction.;4 cl