| Comparative experiments of gravity separation, non-toxic leaching and flotation were carried out for a gold mine in Jilin province, and the effects of grinding fineness, reagent dosage and pulp concentration on beneficiation efficiency were studied. The results showed that the recovery rate of non-toxic leaching process was only 76.13%, and that the gravity separation process has no preferential separation function. Under the conditions: -0.074 mm of grinding fineness with 90.52% content, 60 g/t dosage of both collector isoamyl xanthate and ammonium butyrate black agent, 45% of pulp concentration, 400 g/t dosage of activator copper sulfate, one roughing one refining two scavenging closed-circuit experiment was carried out on the raw ore with gold grade of 3.31 g/t, and the final gold concentrate was 42.34 g/t. The recovery rate of gold was 86.76%, and the recycling effect was the best. |
