Manual of Cyanidation (Classic Reprint) - Tapa dura

Sinopsis

Excerpt from Manual of Cyanidation

Besides containing cyanide, the solution to be used for treating the ore must contain some additional or free alkali, because nearly all ores contain acid or tend to develop it during the course of treatment, and acids react with the alkaline cyanide to form hydrocyanic acid, hcn, thus involving a loss of the active reagent kon. The alkali most commonly used is lime, both because of its cheapness, and also because some lime is needed in any case to coagulate and settle the separated slime prepara tory to the slime treatment process. Caustic soda may also be used as protective alkali, though lime is usually preferable for chemical reasons, apart from other considerations.

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