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最近美国矿业局发表的5765号研究报告总结了铅-锌矿样浮选研究的结果。通常认为,当粒度小到一定限度以下,回收率就逐渐下降;对20个经营矿山的调查指明,在铅锌矿浮选中,现行的实际粒度界限为～25%-20微米。另一方面,在某些情况下,最适宜的浮选粒度范围被确定在400和1600目之间。然而,最近的研究表明,有些矿样要一直磨到96%—325目或76%—1600目之后才能单体分离。在另一种情况下,粗磨至400目,而后第一次铅精选精矿再磨至1600目,此时虽有一些闪锌矿颗
Recently, the United States Department of Mines published 5765 research report summarizes the results of lead-zinc flotation study. It is generally accepted that when the particle size is small enough to fall below a certain limit, the recovery rate decreases gradually; a survey of 20 operating mines indicates that the current practical particle size limit is ~ 25% -20 μm for lead-zinc flotation. On the other hand, in some cases, the most suitable flotation particle size range was determined between 400 and 1600 mesh. However, recent studies have shown that some samples have to be milled to 96% -325 mesh or 76% -1600 mesh before monomer separation. In another case, coarse grinding to 400 mesh, and then the first lead concentrate refinished to 1600 mesh, although at this time some sphalerite