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首页> 外文会议>XXI International Mineral Processing Congress >THE SYNERGISTIC INTERACTIONS OF MIXTURES OF THIOL COLLECTORS IN THE FLOTATION OF SULPHIDE MINERALS
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THE SYNERGISTIC INTERACTIONS OF MIXTURES OF THIOL COLLECTORS IN THE FLOTATION OF SULPHIDE MINERALS

机译：硫代矿物浮选过程中硫代集电体混合物的协同相互作用

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Collectors are used in flotation to enhance the hydrophobicity of the valuable mineral surfaces. In many applications single collectors are used successfully. However mixtures of thiol collectors are increasingly being used to enhance the flotation performance obtained with sulphide mineral bearing ores. This phenomenon is referred to as synergism and is defined as the enhanced performance achieved by mixtures of collectors over and above the performance of the proportional contribution of each individual collector. This paper investigates the effect of the use of binary mixtures of butyl derivatives of xanthate, dithiocarbamate and dithiophosphate on the flotation performance of pyrite as obtained in microflotation tests. Electrochemical and thermochemical techniques have been employed in an attempt to elucidate the respective causes of synergism. The results showed that synergistic enhancements were obtained with mixtures of n-butyl dithiocarbamate with iso-butyl xanthate and with mixtures of iso-butyl xanthate with di-butyl-dithiophosphate. It is proposed that the synergism occurs as a result of mixed dithiolate and metal thiolate surface species forming and that this is dependent on the formation of dixanthogen in the case of xanthates. Dixanthogen formation was dependent on concentration. The electrochemical measurements showed that dixanthogen was only formed at concentrations above 10~(-6) M. Thermochemical measurements at low concentrations showed that higher heats were obtained with n-butyl dithiocarbamate than with iso-butyl xanthate which indicated stronger adsorption onto pyrite and that co-adsorption was obtained with mixtures of collectors. The measured heat of adsorption were consistent with no dixanthogen being formed at the low concentrations.
机译：收集器用于浮选，以增强有价值的矿物表面的疏水性。在许多应用中，成功使用了单个收集器。然而，越来越多地使用硫醇捕收剂的混合物来增强用含硫化物矿物的矿石获得的浮选性能。这种现象称为协同效应，定义为除每个单独的收集器按比例分配的性能之外，收集器的混合物所实现的增强的性能。本文研究了使用黄原酸酯，二硫代氨基甲酸酯和二硫代磷酸酯的丁基衍生物的二元混合物对微浮选试验中获得的黄铁矿浮选性能的影响。为了阐明协同作用的各自原因，已采用电化学和热化学技术。结果表明，二硫代氨基甲酸正丁酯与黄药酸异丁酯的混合物以及黄原酸异丁酯与二硫代磷酸二丁酯的混合物获得了协同增效作用。提出协同作用是由于二硫醇盐和金属硫醇盐表面物质混合形成的结果而产生的，并且在黄药的情况下，这取决于双黄原的形成。双黄原形成取决于浓度。电化学测量表明，仅在高于10〜（-6）M的浓度下才形成双黄原。在低浓度下的热化学测量表明，二硫代氨基甲酸正丁酯比黄原酸异丁酯获得更高的热量，这表明黄药对黄铁矿的吸附更强，并且用捕收剂的混合物获得共吸附。测得的吸附热与在低浓度下未形成双黄原胶一致。

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