矿物浮选过程中铅离子的活化作用及新理论

Activation and New Theory of Lead Ion in Minerals Flotation Process

介绍了铅离子活化对矿物浮选行为的影响及机理。经典的活化浮选理论认为:铅离子羟基络合物或氢氧化铅沉淀是有效活化组分,铅离子组分(Pb(OH)^+和Pb(OH)_2(aq))优先吸附在矿物表面活化矿物表面位点,有利于捕收剂吸附。最新研究结果表明,铅离子组分与捕收剂组分反应形成金属—有机配合物(PbCollector),其在矿物浮选过程中发挥了极大的作用,并在捕收能力和选择性方面体现了极大的潜力。总结阐述了铅离子活化的经典理论及新进展,将"金属离子配位调控分子组装"引入矿物浮选过程中金属离子活化或抑制领域,为全面理解金属离子对矿物浮选行为的影响提供参考,并为新型金属有机配合物浮选药剂的开发提供新的思路。

This paper summarizes the effect and mechanism of the activation of lead ion on minerals flotation behaviors. The classical activation theory holds that lead hydroxyl complexes or lead hydroxide precipitates are the effective activating component, which is preferentially adsorbed on the mineral surface to provide more active sites and then the dissociated collector ions react with Pb-active sites to create strong adsorbates. The latest research shows that the lead ion component reacts with the collector component to form metal-collector complexes that play a significant role in the mineral flotation process. And the metal-collector complexes demonstrate a significant superiority in collecting capacity and selectivity. This paper reviews the classical theory and provide some new insights into the lead ion activation. A new theory, ＂coordination and molecules assembly by metal ion＂ is introduced to improve the activation or depression of metal ions in minerals flotation process, which provides a reference for a comprehensive understanding of the effect of metal ions on mineral flotation behavior and supplies a new idea for the development of new flotation agents.