Abstract: In order to solve the problems of high zinc content and low silver recovery of the copper concentrate produced in Lame Zinc Concentrator, PA was used as the collector, the lime which could strongly depress the silver minerals was eliminated and the agitation in cleaning was intensified to remove PA from surface of mineral such as marmatite, resulting in good beneficiation indexes. The application of a new reagent regime for copper separation in industrial production has led to a reduced copper concentration cost, with a zinc content reduction in copper concentrate from 16.33% to 7.92%, copper recovery increase by 6.01 percentage points and a silver content increase per ton copper concentrate by 1 007 g, which can bring an annual additional economic benefit of more than 10 M yuan to the concentrator.

Key words: PA collector, Agitation, Copper separation from zinc, Silver recovery