electrorefining

[ ih-lek-troh-ri-fahy-ning ]
/ ɪˌlɛk troʊ rɪˈfaɪ nɪŋ /

noun

the process for refining a metal in an electrolytic cell, in which the impure metal is used as the anode and the refined metal is deposited on the cathode.

Origin of electrorefining