对大厂铅锌多金属硫化矿混合精矿的浮选分离工艺进行了研究，探索了混合精矿经加温预处理后再进行浮选分离的工艺，并得到了较好的浮选试验指标。并探索了在加温基础上，加入亚硫酸钠与硫酸锌作为抑制剂预处理混合精矿，然后再进行浮选，通过一次铅粗选和两次铅精选，铅回收率达到69．95％，铅品位达到了39．97％，锌含量降到了1．17％；铅回收率较加温不加入抑制剂时提高了7．61个百分点，较好地解决了铅锌多金属硫化矿混合精矿难分离的问题。%Flotation separation of Pb⁃Zn bulk concentrate of a polymetallic sulfide ore from Dachang, Guangxi was investigated. Good flotation indexes were achieved when pulp heating had been introduced as a pretreatment process before flotation. Furthermore, with sodium sulfite and zinc sulfate as depressants, flotation of pre⁃heated bulk concentrate pulp, including one stage of Pb roughing and two stages of Pb cleaning, was conducted, resulted in 69.95%Pb recovery to the lead concentrate grading 39.97%Pb, with the zinc content therein decreased to 1.17%. Compared to the approach with pre⁃heating yet without dispersant, the Pb recovery by the new technique was increased by 7.61 percentage points, which solved effectively the puzzle for Pb⁃Zn bulk concentrate separation of such polymetallic sulfide ore.
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