Coarse particle separation is important in mineral processing. In this study, the performance of coarse chalcopyrite ore separation (−600 μm, Cu grade 0.375 %) by fluidized bed flotation (FBF) was investigated and the basic function of fluidized bed on the particle separation is discussed. The chalcopyrite grain size distribution mainly ranges from 50 to 300 μm, with over 80 % of the grains being liberated. The results indicate that the FBF system can reject tailings with a yield of 48 % and a Cu grade of 0.06 %. Additionally, concentrate Cu grade reaches 0.62 %, which is around 1.65 times higher than feed, resulting in a total Cu recovery of 91.55 %. The introduction of a fluidized bed increases Cu recovery of −600 + 300 μm from 50 % to73%, as it improves the possibility of bubble-particle attachment, but the variation of bed height has little influence. Particles with a size of −300 + 74 μm can obtain a 96 % Cu recovery in the bubbly flow, while particles with a size of −74 μm lose their separation effect due to hydraulic entrainment.

中文翻译：

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优化流化床浮选中粗黄铜矿的分离：自生床的作用


粗颗粒分离在矿物加工中很重要。在本研究中，研究了流化床浮选（FBF）分离粗黄铜矿矿石（-600μm，铜品位0.375％）的性能，并讨论了流化床在颗粒分离中的基本功能。黄铜矿晶粒尺寸分布主要在50～300μm之间，80%以上的晶粒处于游离状态。结果表明，FBF系统的尾矿剔除率达48%，铜品位达0.06%。此外，精矿铜品位达到0.62%，比饲料高出约1.65倍，铜总回收率为91.55%。流化床的引入将-600 + 300 μm的Cu回收率从50%提高到73%，因为它提高了气泡-颗粒附着的可能性，但床高度的变化影响不大。尺寸为-300+74μm的颗粒在气泡流中可以获得96%的Cu回收率，而尺寸为-74μm的颗粒由于水力夹带而失去分离效果。