Abstract The sulfidization-xanthate method is a commonly used method for recovering smithsonite. The attenuation law of the sulfide layer on the surface of smithsonite was investigated by microflotation test and Local electrochemical impedance spectroscopy (LEIS). The microflotation test showed that the recovery efficiency of smithsonite decreased from 82.58% to 64.16% when the sulfidization time increased from 2 to 10 min. It was indicated that the newly formed sulfide layer is unstable and decays with an extension of sulfidization time. After sulfidization of smithsonite, its surface conductivity is changed. The LEIS method was used to in situ study the conductivity of smithsonite surface. It was revealed that when the sulfidization time was 10–30 min, the electrochemical impedance increased from 7.58 × 104 to 7.68 × 104 and the conductivity deteriorated. It was indicated that the newly formed sulfide component is unstable and begins to decay.

中文翻译：

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利用局域电化学阻抗谱研究菱锌矿表面硫化物层衰减规律

摘要 硫化-黄药法是一种常用的菱锌矿回收方法。通过微浮选试验和局域电化学阻抗谱(LEIS)研究了菱锌矿表面硫化物层的衰减规律。微浮选试验表明，当硫化时间由2分钟增加到10分钟时，菱锌矿的回收率从82.58%下降到64.16%。表明新形成的硫化物层不稳定，随着硫化时间的延长而衰减。菱锌矿硫化后，其表面电导率发生变化。LEIS方法用于原位研究菱锌矿表面的电导率。结果表明，当硫化时间为 10-30 分钟时，电化学阻抗从 7.58 × 104 增加到 7。68 × 104，导电性变差。表明新形成的硫化物组分不稳定并开始衰变。