河北某难选金矿选矿试验研究

针对河北某金矿矿石自然金粒度大小不等、嵌存状态复杂的特点,采用尼尔森重选—浮选工艺流程回收金取得了较为理想的指标。尼尔森选矿机处理一段磨矿产品回收中粗粒金,获得品位291 g/t、回收率26.71%的重选金精矿。尼尔森中矿并入尾矿一起再磨至-0.074 mm占85%,以丁基黄药和M-钠盐组合捕收剂强化金的浮选,获得品位122.7 g/t、回收率62.35%的浮选金精矿,金总回收率达到89.06%。相比单一浮选流程,金回收率提高3.57%。

Experimental research on one refractory gold ore in Hebei

Considering the characteristics of different sized native gold andcomplex embedding conditions of one gold ore, Nelson gravity- flotation process is used to recover gold and achieves satisfactory results. Nelson processing machinery treats the first-stage grinding products and recovers medium and large sized gold particles, obtaining gravity separation gold concentrates with grade of 291 g/t and recovery rate Of 26.71%. Nelson middlings are mixed with tailings and together grinded to 85 % - 0. 074 mm. Combined collector of Butyl Xanthate and M-sodium salt is used to enhance gold flotation ,obtaining flotation gold concentrates with grade of 122.7 g/t and recovery rate of 62.35 %. Overall gold recovery rate reaches 89.06 % and compared to single flotation process, gold recovery rate is increased by 3.57 %.