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宝山西部含银难选铅锌矿经过多年的试验研究及生产实践，均未取得较好的选矿指标。本研究在充分研究矿石特性的基础上，采用优先浮选粗精矿再磨的浮选工艺流程，利用BK－725药剂，获得良好的选别效果。
Silver-bearing refractory lead-zinc mine in western Baoshan after years of experimental research and production practices, have not achieved a better dressing index. In this study, on the basis of fully studying the characteristics of ore, the flotation process with preferential flotation of coarse ore concentrate was adopted, and BK-725 agent was used to obtain good sorting results.