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本文介绍了在浮选OK Tedi斑岩硫化铜矿石时提高细粒铜矿物回收率方法的研究。目前该矿选厂处理斑岩/矽卡岩混合矿石,将矿石磨到D_(80)为180μm后,用二硫代磷酸盐/单硫代磷酸盐为混合捕收剂在pH为11.5的条件下进行浮选。经考查表明,在粗选和扫选作业中-10μm的铜回收率只占原矿的81%。经对矿浆和矿物表面化学成分测定表明,在选别过程中铜矿物被氧化。在实验室对两种班岩硫化铜矿进行了逐级试验研究,以作为提高细粒铜矿物回收率方法的初步探索。试验表明,在一个样品中主要铜矿物是蓝辉铜矿,-100μm级别中铜的回收率仅为40%;而另个样品中主要铜矿物是黄铜矿,-10μm级别中铜的回收率为80%。前一个样品中细粒铜回收率低与实验室磨矿和调浆过程所发生的矿物氧化作用有关。通过控制电位的硫化作用来消除蓝辉铜矿被氧化的不利影响。结果表明,蓝辉铜矿样品中细粒铜矿物的回收率明显提高。文章讨论了采用或不采用硫化处理时该选厂各粒级物料中铜的回收率。
This article describes the study of methods for increasing the recovery of fine-grained copper minerals when flotation of OK Tedi porphyry copper sulfide ores. At present, the beneficiation plant processes the mixed porphyry / skarn ore, and when the ore is pulverized to a D_ (80) of 180 μm, it is treated with dithiophosphate / monothiophosphate as a mixed collector at a pH of 11.5 Under the flotation. After examination, copper recovery of -10 μm was only 81% of crude ore in roughing and scanning operations. The chemical composition of the pulp and mineral surface analysis showed that the copper mineral was oxidized during the sorting process. Two classes of copper sulfide ores have been studied step by step in the laboratory as a preliminary exploration to improve the recovery rate of fine-grained copper minerals. Experiments show that in one sample, the main copper mineral is blue-chalcopyrite. The recovery of copper in the -100 μm range is only 40%. In another sample, the main copper mineral is chalcopyrite, and the copper in the range of -10 μm The recovery rate is 80%. The low recovery of fine-grained copper from the previous sample is related to the mineral oxidation occurring in the laboratory grinding and conditioning process. Elimination of the adverse effects of blue-chalcopyrite oxidation by controlling the vulcanization of potential. The results show that the recovery rate of fine-grained copper minerals in Langhui copper mine is obviously increased. The paper discusses the recovery of copper from the various grain fractions of the plant at or without vulcanization.