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首页> 外文期刊>International Journal of Mineral Processing >Depression mechanisms of sodium bisulphite in the xanthate-induced flotation of copper activated sphalerite
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Depression mechanisms of sodium bisulphite in the xanthate-induced flotation of copper activated sphalerite

机译：黄药酸盐诱导的铜活化闪锌矿浮选中亚硫酸氢钠的抑制机理

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摘要

The effect of sodium bisulphite on the xanthate-induced flotation of copper-activated sphalerite has been studied using batch flotation testing, surface analysis techniques (XPS and ToF-SIMS), and FTIR. The various techniques have been used to identify the mechanisms of interaction of sulphite ions with both collector and the sphalerite surface. The results indicate that sodium bisulphite depressed the flotation of sphalerite particles pre-treated with copper and xanthate at pH 9 with nitrogen and air purging. It was found that sodium bisulphite interacts with the sphalerite surface, as well as with xanthate in its adsorbed state. Based on the evidence obtained in the present study, and in conjunction with previous work, the mechanisms involved in the depression of the xanthate-induced flotation of copper-activated sphalerite by sulphite are proposed. It is suggested that copper xanthate decomposition on the surface of the activated sphalerite and the decomposition of the hydrophobic copper-sulphide-like species on the sphalerite surface are the active mechanisms for sphalerite depression by sodium bisulphite.
机译：使用分批浮选测试，表面分析技术（XPS和ToF-SIMS）和FTIR，研究了亚硫酸氢钠对黄药诱导的铜活化闪锌矿浮选的影响。已使用各种技术来确定亚硫酸根离子与捕收剂和闪锌矿表面相互作用的机理。结果表明，在氮气和空气吹扫下，亚硫酸氢钠抑制了用铜和黄药在pH 9下预处理的闪锌矿颗粒的浮选。发现亚硫酸氢钠与闪锌矿表面以及处于吸附状态的黄药相互作用。基于本研究获得的证据，并结合先前的工作，提出了由亚硫酸盐抑制黄药引起的铜活化闪锌矿浮选的机理。研究表明，活化闪锌矿表面上的黄药酸铜分解和闪锌矿表面上疏水性硫化铜样物质的分解是亚硫酸氢钠压制闪锌矿的活性机理。

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