Production process and production index of polymetallic silver-lead-zinc sulfide ore in Jiangxi province was not stable and ideal result from of flotation reagent system. Optimization research of beneficiation process was carried out. Result showed that,lead concentrate with lead and silver grade of 44. 21% and 1736. 42 g/t and recovery of 86. 61% and 60. 59%, zinc concentrate with zinc and silver grade of 39. 06% and 374. 16 g/t and recovery of 81. 81% and 18. 68%,total silver re-covery of 79. 27% were obtained in the condition of same raw ore grade,setting the grinding fineness of-0. 074 mm from 90%to 85%,cutting one lead and zinc cleaning stage respectively,and adding one lead scavenging stage. After the optimization in on-site beneficiation process based on research results,lead recovery of lead concentrate increased 3. 26 percentage points,zinc recovery of zinc concentrate increased 3. 65 percentage points and total silver recovery increased 9. 44 percentage points. Prob-lems existed in original beneficiation process were well resolved by new beneficiation process.%江西某银铅锌多金属矿选矿厂因药剂制度等方面的原因,导致生产过程不够稳定,生产指标不理想.对该选矿厂的选矿工艺优化研究表明,在原矿品位相当,现场磨矿细度从-0.074 mm占90%调整为-0.074 mm占85%,铅锌精选次数各减少1次、铅扫选次数增加1次的情况下,获得了铅品位为44.21%、含银1736.42 g/t、铅回收率为86.61%、银回收率为60.59%的铅精矿,以及锌品位为39.06%、含银374.16 g/t、锌回收率为81.81%、银回收率为18.68%的锌精矿,银总回收率达79.27%.根据研究成果对现场选矿工艺进行优化后,铅精矿铅回收率提高了3.26个百分点,锌精矿锌回收率提高了3.65个百分点,银总回收率提高了9.44个百分点.新工艺较好地解决了原工艺所存在的问题.
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