山东某原生金矿石浮选试验研究

山东某金矿选矿厂以异戊基黄药+丁胺黑药为捕收剂，采用磨矿细度为-0.074 mm占60%的一粗二精二扫浮选工艺流程处理原生金矿石，金回收率仅59%左右。为此，着重对该矿石进行了浮选药剂条件和磨矿细度试验研究。试验结果表明：以BD-11为捕收剂、硫酸铜为活化剂、11号油为起泡剂，在-0.074 mm占60%的磨矿细度下，通过一粗一精一扫闭路浮选，可获得金品位为30.83 g/t，金回收率为93.36%的金精矿，与现场生产相比，金回收率得到了大幅度提高。

Flotation Test Research for a Primary Gold Ore of Shandong

The Isoamyl Xanthate and Butylamine Dithiophosphate are used together as collector in a Gold Beneficiation Plant of Shandong. And a flotation process of one roughing -two cleaning-two scavenging for gold ore with grinding of -0.074 mm 60% is adopted, only obtaining a gold recovery of about 59%. Thus, researches mainly focusing on the reagent condition tests and the grinding fineness tests were carried out. The tests results indicated that the gold concentrate with Fe grade of 30.83 g/t and Fe recovery of 93.36% was obtained by a closed-circuit flotation of one roughing-one cleaning-one scavenging with conditions of BD-11 as collectors, Copper Sulfate as an activator, 11# oil as the foaming agent, and the grinding fineness of -0.074 mm 60%. By this method, the gold recovery can be rapidly improved, compared with the on-site production.