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    • 10. 发明公开
    • Molten salt electrowinning electrode, method and cell
    • Elektrode,Verfahren und Zelle zur Schmelzflusselektrolyse。
    • EP0257710A1
    • 1988-03-02
    • EP87201569.8
    • 1987-08-19
    • MOLTECH Invent S.A.
    • Darracq, DominiqueDuruz, Jean-JacquesDurmelat, Claude
    • C25C7/02C25C3/08C25C3/12
    • C25C3/12C25C7/025
    • A bipolar electrode for electrowinning aluminum or other metals by electrolysis of a molten salt electrolyte containing a dissolved compound of the metal to be won comprises an anodic (5) and a cathodic (6) surface which are both preserved during operation by dissolution of small amounts of a substance in the electrolyte (7) which is capable of being deposited on either surface at a rate compensating the corrosion thereof during electrolysis. The anodic surface (5) is for example cerium oxyfluoride and the cathodic surface cerium hexaboride (6), both surfaces being preserved by addition of cerium compounds, such as oxides, fluorides, hydrides etc. to the melt. The cathodic surface may also include titanium diboride on top of or together with cerium hexaboride.
    • 通过电解含有待溶解的金属的溶解化合物的熔融盐电解质来电解提取铝或其它金属的双极电极包括阳极(5)和阴极(6)表面,它们在操作期间通过少量溶解而保留 的电解质(7)中的物质,其能够以补偿其在电解期间的腐蚀的速率沉积在任一表面上。 阳极表面(5)是例如氧氟化铈和阴极表面六硼化钴(6),两个表面都通过向熔体中加入铈化合物如氧化物,氟化物,氢化物等来保存。 阴极表面还可以包括二硼化钛在六硼化铈的顶部或与六硼化铈一起。