Decomposition of cyanide in electrolytic cell lining
    1.
    发明授权
    Decomposition of cyanide in electrolytic cell lining 失效
    氰化物在电解槽衬里的分解

    公开(公告)号:US5683663A

    公开(公告)日:1997-11-04

    申请号:US661920

    申请日:1996-06-12

    摘要: A method of treating sodium cyanide in spent carbonaceous and/or refractory material, i.e., spent potlining, from an electrolytic cell for producing aluminum from alumina dissolved in a sodium-containing electrolyte, wherein sodium cyanide forms in the carbonaceous material during operation of the cell. The method comprises grinding the spent carbonaceous and/or refractory material containing sodium cyanide to provide particles of spent carbonaceous material and adding a reactive material capable of reacting with the sodium cyanide to provide a mixture of reactive material and spent potlining material. Thereafter, the mixture is heated to a temperature effective in reacting the reactive material with the sodium cyanide to destroy the sodium cyanide in the spent potlining.

    摘要翻译: 在用于从溶解在含钠电解质中的氧化铝制备铝的电解池中处理废碳和/或耐火材料中的氰化钠的方法,即废弃的方法,其中在电池运行期间在碳质材料中形成氰化钠 。 该方法包括研磨含有氰化钠的废碳和/或耐火材料,以提供废碳质材料的颗粒,并加入能够与氰化钠反应的反应性材料,以提供反应性材料和废弃的陶瓷材料的混合物。 此后,将混合物加热到使反应性物质与氰化钠反应的有效方法,以消除废罐中的氰化钠。