Cyanidation process

Cyanidation, in simple terms, is an electrochemical process that oxidizes gold and reduces oxygen. In addition, it involves the use of different cyanide salts as leaching agents which form gold complexes in the alkaline solution.

Tank and vat leaching involves placing ore, usually after size reduction and classification, into large tanks or vats at ambient operating conditions containing a leaching solution and allowing the valuable material to leach from the ore into solution.

Cyanide tank construction
Cyanide tanks are the main facilities for tank leaching process, which are often of rectangular shape. The size and quantity of the cyanide tank are based on the capacity, local conditions and leaching time. The bottom of the cyanide tank tilts to the discharging end; the obliquity is about 0.8%. The height of the tank is about 1.5m. There is a false floor about 100-200mm high above the tank bottom. The materials made of the false floor should be economical and easy to obtain from local conditions. The common false floor is made of wood bars or bamboo rafts with rush mats or bamboo mats on it.

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