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I would like to know how I can modify the cyanidation process to leach a gold ore which has got the following characteristics:
Au grade 3-4 g/t
Hg grade 1-2.5 g/t
Cu, As,Sb grades: trace
FeS: trace
The ore has produced unsatisfactory results after milling to 85% passing 75 microns and processing in a CIP plant under the conditions of 49% solids,pH 8,NaCN 1kg/ton and 24 hours residence time.