| 硫脲浸金电化学行为研究 |
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| 引用本文： | 陶媛媛,项朋志,周小华,叶国华.硫脲浸金电化学行为研究[J].贵金属,2021,42(1):22-27. |
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| 作者姓名： | 陶媛媛 项朋志 周小华 叶国华 |
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| 作者单位： | 昆明理工大学 国土资源工程学院，昆明 650093;云南开放大学 化学工程学院，昆明 650022;昆明学院 昆明滇池湖泊污染防治合作研究中心，昆明 650214 |
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| 基金项目： | 国家自然科学基金项目(51764024)；云南教育厅科学研究基金(2021J1374) |
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| 摘 要： | 采用循环伏安法(CV)、Tafel曲线和差分脉冲伏安法(DPV)等电化学方法对模拟硫脲浸金体系进行了研究.结果表明,硫脲浓度范围为0.005～0.04 mol/L,浓度增大有利于金的浸出;在Fe3+浓度为0.01～0.08 mol/L范围内,随着Fe3+浓度的增大,金腐蚀电位负移,腐蚀电流变大;适度升温可以提高金的腐蚀...
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| 关 键 词： | 硫脲 浸金 Fe3+浓度 电化学 腐蚀性能 |
| 收稿时间： | 2020/4/26 0:00:00 |
Study on the electrochemical behavior of thiourea leaching gold |
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| TAO Yuan-yuan,XIANG Peng-zhi,ZHOU Xiao-hu,YE Guo-hua.Study on the electrochemical behavior of thiourea leaching gold[J].Precious Metals,2021,42(1):22-27. |
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| Authors: | TAO Yuan-yuan XIANG Peng-zhi ZHOU Xiao-hu YE Guo-hua |
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| Affiliation: | Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;School of Chemical Engineering, Yunnan Open University, Kunming 650022, China;Kunming Cooperative Research Center for Pollution Prevention of Dianchi Lake, Kunming University, Kunming 650214, China |
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| Abstract: | Cyclic voltammetry, Tafel curve and differential pulsed voltammetry were used to analyze and simulate thiourea gold leaching system. The results showed that the increase of thiourea concentration was beneficial to gold leaching in the concentration range of 0.005 to 0.04 mol/L. The gold corrosion potential shifted to negative direction and the corrosion current increased with iron concentration in the range of 0.01~0.08 mol/L of iron concentration. A moderate increase in temperature can increase gold corrosion. The actual mineral leaching verification experiments showed that under certain external conditions, the gold leaching rate increased with iron concentration in the range of 0.02 to 0.08 mol/L, reaching a maximum of 53.21%. The leaching rate of gold increased with thiourea concentration (0.005~ 0.05 mol/L), reaching a maximum of 78.67%. This is basically consistent with the conclusion of electrochemical analysis. |
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| Keywords: | thiourea gold leaching Fe3 + concentration electrochemistry corrosion properties |
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