Title: Molten salt eleclrolysis with non-consumable anode
Application Number: 88107981 Application Date: 1988.11.18
Publication Number: 1042737 Publication Date: 1990.06.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C22C3/12,C25C3/00,C25C7/02
Applicant(s) Name: Moltech Invent S.A. Address:
Inventor(s) Name: Doan Kim Son, Lazouni Abdelkrim
Attorney & Agent: QI ZENGDU
Abstract:
     A method of electrowinning a metal by electrolysis of a melt containing a dissolved species of the metal to be won using a non-consumable anode having a metal, alloy or cermet substrate and an operative anode surface which is a protective surface coating of cerium oxyfluoride preserved by maintaining in the melt a suitable concentration of cerium, is characterized by using an anode provided with an electronically conductive oxygen barrier on the surface of the metal, alloy or cermet substrate. The barrier layer may be a chromium oxide film on a chromium-containing alloy substrate. Preferably the barrier layer carries a ceramic oxide layer, eg of stabilized copper oxide which acts as anchorage for the cerium oxyfluoride.
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