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The copper mine Cerovo -East Serbia, as well as the other ore bodies in its vicinity, contains a significant amount of oxide copper minerals in their uper layers (>40%). Processing of such mixed ores by the existing concentration technologies leads to a substantial copper losses (<60%). Reduction of "oxide copper", by acid leaching prior the flotation concentration, can increase the overall copper efficiency up to more than 70% in the single-stage leaching, achieving an efficiency in thedoi:10.2298/hemind140509061s fatcat:wi25t6sgb5b5pdhlof7jsfv4xi