Patent ID: 8871162
Filing Date: 2014-10-28
Classification: B03D,C22B

Abstract:
1. A process for gold and copper recovery from mixed oxide-sulfide copper ores comprising the steps of: crushing, screening and grinding the ores to appropriate size; subjecting the ground ores to copper flotation, using xanthate as collector, and a suitable frother at a pH range of about 7 to about 8 to obtain a rougher concentrate, a scavenger concentrate and a copper by product, said rougher concentrate undergoes further grinding and flotation to obtain final copper concentrate and cleaner tails; said scavenger concentrate undergoes further grinding before recycling to copper flotation stage; and said copper by-products undergo further processing by dewatering, then flotation at a pH range of about 5 to about 7 using a fatty acid-xanthate reagent combination as collector or promoter of the gold and a suitable frother to obtain rougher concentrate, scavenger concentrate and scavenger tails, subjecting said rougher concentrate to regrinding and cleaner flotation to separate the gold concentrate from the tailings, leaching the copper-gold concentrate with H