Part of large-scale industrial test results of milling fineness influence on lead, copper and zinc minerals flotation results in the Rudnik flotation plant are shown in this paper. Based on industrial research it has been concluded that one-stage milling and two-stage classification of complex Pb-Zn-Cu ore leads to so-called “differential milling”. Namely, galena has much faster comminution than other minerals present in ore due to galena softness. This occurrence leads to galena converting into small particles size fractions which have low flotation rate and, at the same time, copper and zinc minerals stay “unliberated” in coarse particle size fractions (minerals are not free of mutual bonds). In this paper, recorded copper minerals flotation products results are shown, including lead underflow (copper flotation input), copper concentrate and copper underflow, in function of particle size; particle size distribution, minerals and metals distribution in function of particle size were determined; obtained research results confirmed “differential milling” assumption, as well as severe floatability difference between chalcopyrite of a different particle size.

中文翻译：

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Rudnik矿浮选厂黄铜矿的可浮性

鲁德尼克浮选厂磨矿细度对铅、铜、锌矿物浮选结果的影响的部分大型工业试验结果如下所示。根据工业研究得出的结论是，复杂 Pb-Zn-Cu 矿石的一级磨矿和两级分级导致了所谓的“差速磨矿”。即，由于方铅矿柔软，方铅矿比矿石中存在的其他矿物具有更快的粉碎速度。这种情况导致方铅矿转化为浮选率低的小粒度部分，同时铜和锌矿物在粗粒度部分中保持“未释放”（矿物并非没有相互键）。在本文中，记录的铜矿物浮选产品结果显示，包括铅底流（铜浮选输入），铜精矿和铜底流，与粒度有关；确定了粒度分布、矿物和金属分布与粒度的关系；获得的研究结果证实了“差异研磨”假设，以及不同粒径黄铜矿之间存在严重的可浮性差异。