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electrorefining
electrorefining n. 
/iˌlɛktroʊriˈfaɪnɪŋ/ Metallurgy the refining of metal by an electrochemical process, typically by means of an electrolytic cell in which the impure metal forms the anode or is present in solution, pure metal being deposited on the cathode.
Brit. /ᵻˌlɛktrə(ʊ)rᵻˈfʌɪnɪŋ/
, /ᵻˌlɛktrə(ʊ)rᵻˈfʌɪnɪŋ/U.S. /əˌlɛktroʊrəˈfaɪnɪŋ/
, /əˌlɛktroʊrəˈfaɪnɪŋ//iˌlɛktroʊriˈfaɪnɪŋ/ΚΠ
1890 W. G. McMillan Treat. Electro-metall. 285 The electro-refining or extraction of metals remained merely an interesting laboratory experiment, the practical application of which was beyond the range of economical solution until the invention and multiplication of dynamo-electric machinery.
1935 W. A. Koehler Princ. & Applic. Electrochem. II. xxiii. 170 A large part of the silver produced is obtained from the slimes which are a by-product from the electrorefining of baser metals, especially from the refining of copper, lead, nickel, and zinc.
1997 Jrnl. Nucl. Materials 247 215/2 The irradiated fuels are pyrochemically reprocessed by molten-salt electrorefining.
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