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。

    Suppression of cyanide formation in electrolytic cell lining
    2.
    发明授权
    Suppression of cyanide formation in electrolytic cell lining 失效
    抑制电解池内的氰化物形成

    公开(公告)号:US5538604A

    公开(公告)日:1996-07-23

    申请号:US375790

    申请日:1995-01-20

    摘要: Disclosed is an improved carbonaceous material suitable for use as a liner in an aluminum producing electrolytic cell, the cell using an electrolyte comprised of sodium containing compounds and the carbonaceous material penetrable by sodium or nitrogen and resistant to formation or accumulation of sodium cyanide during operation of the cell. The carbonaceous material is comprised of carbon and a reactive compound capable of reacting with one of sodium, nitrogen and sodium cyanide during operation of the cell to produce aluminum, the reactive compound present in an amount sufficient to suppress formation or accumulation of cyanide compounds in the liner.

    摘要翻译: 公开了一种改进的碳质材料,适合用作铝生产电解槽中的衬垫,该电池使用由含钠化合物组成的电解质和可渗透钠或氮的碳质材料,并且在运行期间耐氰化钠形成或积聚 细胞。 碳质材料由碳和能够在电池操作期间与钠,氮和氰化钠中的一种反应生成铝的反应性化合物构成,反应性化合物的存在量足以抑制氰化物在 衬垫。