Gold dissolution using cyanide requires the presence of an oxidant and invariably the oxidant used is dissolved oxygen. In a typical CIL or CIP agitated leach operation the oxygen is provided by compressed air or oxygen addition. In heap leach operations the oxidant is usually the air present in the heap. In any cyanidation process it is crucial to have both cyanide and an oxidant, in the conditions prevalent in most cyanide plants the rate of gold extraction is controlled by the dissolved oxygen content of the pulp. The addition of peroxide at the start of the leach process can improve the kinetics and recovery of gold and we can supply a tried and tested system to optimize peroxide addition.
Feb 18 2013