Inhibition of galena flotation by humic acid: Identification of the adsorption site for humic acid on moderately oxidized galena surface
Inhibition of galena flotation by humic acid: Identification of the adsorption site for humic acid on moderately oxidized galena surface
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腐殖酸抑制方铅矿浮选：腐殖酸在中度氧化方铅矿表面吸附位点的识别
DOI：
10.1016/j.mineng.2019.03.029
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发表时间：
2019-06
影响因子：
4.8
通讯作者：
Wang Daowei
中科院分区：
文献类型：
--
作者：
Wang Xingjie;Qin Wenqing;Jiao Fen;Liu Ruizeng;Wang Daowei
通过微浮选试验，研究了不同氧化还原条件下腐植酸对方铅矿浮选的影响。结果表明，腐植酸是方铅矿中度氧化的有效抑制剂。吸附实验表明，表面氧化对腐植酸在方铅矿表面的吸附起着非常重要的作用。采用Zeta电位、XPS和FT-IR等分析方法对腐植酸在氧化方铅矿表面的选择性吸附机理进行了探讨。结果表明，方铅矿的氧化使其表面组分发生显著变化，有利于腐植酸的吸附。方铅矿氧化生成的单质硫是除硫酸铅外腐植酸的吸附位点之一。
The influence of humic acid on the flotation of galena under different redox conditions was studied based on micro-flotation experiment. The results showed that the humic acid was an effective inhibitor for moderately oxidized galena. Adsorption tests indicated that the surface oxidation played an incredibly important role in the adsorption of humic acid on galena surface. Explorations on identifying the mechanism for the selective adsorption of humic acid on the surface of oxidized galena were carried out by Zeta potential, XPS and FT-IR analysis. The results indicated that the oxidation of galena caused significant changes in surface components, which was beneficial to the adsorption of humic acid. The elemental sulfur formed by the oxidation of galena is one of the adsorption sites for humic acid besides lead sulfate.
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