新疆某低品位硫化铅锌矿石选矿试验研究

新疆某低品位铅锌矿石矿物组成简单，同时矿物伴生关系复杂、嵌布粒度不均匀。为有效回收矿石中的铅和锌，采用铅锌优先浮选工艺，通过铅锌浮选条件试验确定适宜的选矿工艺流程及药剂制度。结果表明：针对铅品位1.04%、锌品位1.66%的原矿石，在磨矿细度为-0.074 mm占70%的条件下，采用2次粗选优先选铅、铅粗精矿再磨至-0.038 mm占100%后3次精选，可获得铅品位45.16%、锌品位1.21%的铅精矿；选铅尾矿经CuSO4活化后，采用“2粗3精”选锌；全流程闭路试验最终可获得铅品位44.16%、铅回收率85.04%的铅精矿，及锌品位43.31%、锌回收率92.45%的锌精矿，较好地实现了铅锌分离回收。研究结果可为同类型矿石的开发利用提供有益参考。

Experimental Study on Beneficiability of a Low Grade Lead-zinc Sulfide Ore in Xinjiang #br# #br#

A low-grade lead-zinc ore in Xinjiang is of simple mineral composition,complex mineral association relationship and uneven particle size.In order to recover lead and zinc in the ore effectively,the appropriate beneficiation process flow and reagent system were determined through the experiments of lead-zinc flotation conditions with lead-zinc preferential flotation process.The results showed that in the condition of grinding fineness of -0.074 mm accounting for 70%,aiming at the raw ores with lead grade of 1.04% and zinc grade of 1.66%,the lead concentrate with lead grade of 45.16% and zinc grade of 1.21% could be obtained by using two roughing for lead selection and then three cleaning for lead coarse concentrate which has been ground to -0.038 mm accounting for 100%.After activation of lead-selected tailings by CuSO₄,zinc was selected by two roughing and three cleaning.Finally,lead concentrate with lead grade of 44.16% and lead recovery rate of 85.04% and zinc concentrate with zinc grade of 43.31% and zinc recovery rate of 92.45% were obtained by closed-circuit test in the whole process,which better realized the separation and recovery of lead and zinc.The research results can provide useful reference for the development and utilization of the same type ore.