METHOD FOR PURIFICATION OF EMITTED GAS FROM METAL REDUCTION PROCESS

摘要

The invention pertains to a method for the purification of an emitted gas 2 from a metal reduction process, wherein gaseous perfluorocarbons are present in emitted gas 2 and an adsorption device 10 is provided, in which the perfluorocarbons are absorbed and then decomposed by the production of hydrogen fluoride. Thereby, the hydrogen fluoride is converted, with an oxide of the metal to be reduced, to the metal fluoride of said metal, and the generated metal fluoride is fed back into the reduction process.