also grinding the ore to an extremely fine particle size can liberate gold encapulsated in sulfides. sgs has very extensive experience with all the unit operations involved in the processing of refractory gold ores and in selecting the optimum flowsheet for a particular ore. our gold metallurgy expertise is second to none. chemical interference
a "refractory" gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals. these ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes. these refractory ores require pre-treatment in order for cyanidation to be effective in recovery of the gold.
the depletion of readily amenable gold ores and discovery of complex deposits inspire knowledge improvement and search of commercially effective technique in extracting gold from refractory gold ores.
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other articles where refractory ore is discussed: gold processing: extraction from refractory ores: many gold-bearing ores and concentrates are not readily amenable to cyanidation owing to the presence of substances that consume the cyanide reagent before it can dissolve the gold preferentially adsorb the gold as it dissolves (a phenomenon called preg-robbing) or completely surround the…
treatment of refractory gold ores extractive metallurgy once the cause has been identified there are a number of alternatives for treating the ore. firstly the gold can be made more amenable to cyanidation by ultra-fine milling followed by a hot atmospheric leach –the albion process.