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    • 2. 发明授权
    • Method of producing aluminum
    • 生产铝的方法
    • US4668351A
    • 1987-05-26
    • US754830
    • 1985-07-12
    • Ernest W. DewingDouglas N. Reesor
    • Ernest W. DewingDouglas N. Reesor
    • C22B21/06C22B9/10C22B21/00C25C3/06C25C3/24
    • C22B21/064
    • A method of purifying aluminum contaminated with cerium or other rare earth metal comprises bringing the molten metal into contact with a halogenating agent. Preferred halogenating agents are aluminum fluoride for reducing cerium levels to around 0.1% to 0.3%, and chlorine gas for reducing cerium levels still further, and these may advantageously be used in sequence. Particulate aluminum fluoride may be introduced into the vortex of a stirred body of the molten metal. The controlled addition of chlorine may be effected by bubbling a mixture of chlorine and an inert gas into a body of the molten metal. The cerium contamination may arise from the use of a dimensionally stable anode comprising cerium dioxide in an aluminum reduction cell.
    • 纯化被铈或其它稀土金属污染的铝的方法包括使熔融金属与卤化剂接触。 优选的卤化剂是将铈水平降低至约0.1%至0.3%的氟化铝和用于还原铈水平的氯气,并且可以有利地顺序使用。 可将微粒氟化铝引入熔融金属搅拌体的涡流中。 氯的控制加入可以通过将氯和惰性气体的混合物鼓泡入熔融金属的主体来实现。 铈污染可能源于在铝还原电池中使用包含二氧化铈的尺寸稳定的阳极。