METHOD OF PROCESSING FLUORINE-CONTAINING WASTES FROM ELECTROLYTIC PRODUCTION OF ALUMINIUM Russian patent published in 2013 - IPC C22B21/00 C25C3/18 C22B7/00 

FIELD: chemistry.

SUBSTANCE: method involves loading material into a metallurgical furnace, heating and holding for 0.5-1.0 hour. Before heating, fluorides of alkali-earth and/or alkali metals are added to the wastes in amount of 1-5%. Heating is carried out at temperature of 1100-1300°C and the wastes are held at this temperature without or with limited access to air while feeding gaseous reaction products into a dry gas cleaning system. Phase separation of the electrolyte and carbon in form of a carbon residue is then carried out.

EFFECT: recycling wastes, extracting valuable components from wastes and returning said components into the technological process.

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