Other

Rudolph Keller

C Norman Cochran

David B Stofesky

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.

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Export, PA, United States of America

Rudolph Keller