贵州某硫化铅锌矿选矿试验研究

贵州某硫化铅锌矿的矿物共生关系复杂，嵌布粒度大小不均匀。为实现矿石中有价金属铅和锌的高效利用，采用优先浮选工艺，并采用新型高效环保锌活化剂X-43替代硫酸铜，通过铅锌浮选条件试验确定适宜的选矿工艺流程和药剂制度。试验结果表明，对于铅品位4.23%、锌品位8.02%的原矿，在磨矿细度为-0.074 mm占80%的条件下，优先选铅时采用1次粗选、1次扫选和铅粗精矿再磨至-0.045 mm占65.5%后3次精选，可获得铅品位50.19%、回收率65.33%的铅精矿；选铅尾矿经活化剂X-43活化后，采用1次粗选、2次扫选和2次精选选锌；经全流程闭路试验可得到铅品位为57.63%、回收率为80.50%的铅精矿，以及锌品位为49.62%、回收率为92.52%的锌精矿，尽可能地实现了铅和锌的有效回收。研究结果可为新型高效锌活化剂X-43的应用和同类型铅锌矿石开发利用提供借鉴。

Experimental Study on Mineral Processing of a Lead-Zinc Sulfide Ore in Guizhou

The mineral symbiosis of a lead-zinc sulfide deposit in Guizhou is complex, and the embedded particle size is uneven. In order to realize the efficient utilization of valuable metal lead and zinc in the ore, the preferential flotation process was adopted, and the new high-efficiency environment-friendly zinc activator X-43 was used to replace copper sulfate. The appropriate beneficiation process flow and reagent system were determined through the lead-zinc flotation condition test. The test results show that for the raw ore with lead grade of 4.23% and zinc grade of 8.02%, under the condition of grinding fineness of -0.074mm accounting for 80%, the lead concentrate with lead grade of 50.19% and lead recovery rate of 65.33% could be obtained by using one roughing, one sweeping and three cleaning after the lead coarse concentrate was grinded to -0.045mm accounting for 65.5%; After the lead tailings were activated by activator X-43, zinc could be separated by one rough separation, two sweeps and two cleanings; The lead concentrate with a grade of 57.63% and a recovery rate of 80.5% and the zinc concentrate with a grade of 49.62% and a recovery rate of 92.52% could be obtained through the closed circuit test of the whole process. The effective recovery of lead and zinc could be achieved as far as possible. The research results can provide a reference for the application of new high-efficiency zinc activator X-43 and the development and utilization of the same type of lead-zinc ores.