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首页> 外文会议>XXI International Mineral Processing Congress >ADSORPTION OF THE THIOL COMPOUND ON GOLD AND PYRITE AND ITS INFLUENCE ON THEIR SELECTIVE FLOTATION
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ADSORPTION OF THE THIOL COMPOUND ON GOLD AND PYRITE AND ITS INFLUENCE ON THEIR SELECTIVE FLOTATION

机译：硫醇化合物在金和硫铁矿上的吸附及其对选择性浮选的影响

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The selective flotation of gold from pyrite was studied using 2-mercaptobenzothiazole (MBT), sodium diethyl dithiophosphate (DTF) and potassium amyl xanthate (PAX). The floatability of gold and pyrite using MBT was higher at pH values from 4 to 6. The MBT adsorption on the gold and pyrite surfaces in acidic medium, was confirmed by FTIR peaks similar to those of the MBT spectrum. On the other hand, the affinity of DTF for the gold surface was rather low and difficult to detect by DRIFTS, except for high DTF concentrations. The adsorption of PAX on gold produced a very high floatability over a broad range of pH at low reagent concentration. The DRIFTS measurements suggested that a chemical adsorption of PAX might take place on these particles, the characteristic IR peaks of dixanthogen and xanthate observed in the differential spectrum. Hallimond tube flotation tests showed a selectivity region for separation of gold from pyrite by using PAX, under oxidizing conditions. At pH values higher than 8, depression of pyrite was increased significantly, while the high recovery of gold remained unchanged.
机译：使用2-巯基苯并噻唑（MBT），二乙基二硫代磷酸钠（DTF）和戊基黄原酸钾（PAX）研究了黄铁矿中金的选择性浮选。 pH值为4至6时，使用MBT的金和黄铁矿的漂浮性更高。通过与MBT光谱相似的FTIR峰证实了MBT在酸性介质中的金和黄铁矿表面的吸附。另一方面，除了高DTF浓度外，DTF对金表面的亲和力很低，很难用DRIFTS进行检测。 PAX在金上的吸附在低试剂浓度下的宽pH值范围内产生了很高的漂浮性。 DRIFTS测量表明，PAX可能在这些颗粒上发生化学吸附，在微分光谱中观察到了黄原酸酯和黄原酸酯的特征IR峰。哈里蒙德管的浮选试验表明，在氧化条件下，使用PAX可从黄铁矿中分离金的选择性区域。在pH值高于8时，黄铁矿的压降显着增加，而金的高回收率保持不变。

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