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    • 2. 发明授权
    • Removal of metal from graphite
    • 从石墨去除金属
    • US06319391B1
    • 2001-11-20
    • US08405372
    • 1995-03-15
    • Stewart Garfield HoldernessRobert Glyn Lewin
    • Stewart Garfield HoldernessRobert Glyn Lewin
    • C25F100
    • G21F9/002
    • A method of treating scrap graphite having a metal contaminant adhered thereto. The metal is separated from the graphite by placing the scrap graphite in an aqueous oxidizing electrolyte and passing there through an electric current. The electric current may be directional. The metal may be uranium and the scrap graphite may be from the casting of uranium fuel rods. The graphite body disintegrates in the electrolyte and the metal dissolves at an accelerated rate under the influence of the electric current. The metal can also break off from the graphite and may dissolve over a longer time period in the electrolyte. The graphite so treated may be separated from the electrolyte by filtering and washing. Where the graphite has been contaminated with uranium the separation by this process is sufficient to allow the graphite to be disposed of in a conventional manner rather than special means required for hazardous, radioactive materials.
    • 一种处理粘附有金属污染物的废石墨的方法。 通过将废石墨放置在氧化电解质水溶液中并通过电流使金属与石墨分离。 电流可以是定向的。 金属可以是铀,废石墨可以来自铀燃料棒的铸造。 石墨体在电解质中分解,金属在电流的影响下以加速的速率溶解。 金属也可能从石墨中脱落,并可能在电解液中较长时间内溶解。 如此处理的石墨可以通过过滤和洗涤与电解质分离。 在石墨被铀污染的地方,通过这种方法进行分离就足以使石墨以常规方式进行处理,而不是危险的放射性物质所需的特殊手段。