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金属矿山 ›› 2019, Vol. 48 ›› Issue (01): 74-77.

• 矿物工程 • 上一篇    下一篇

亚氯酸钠氧化浸出黄铜矿研究

李治明,钟珊,李育彪,陈运鹏   

  1. 武汉理工大学资源与环境工程学院,湖北 武汉 430070
  • 出版日期:2019-01-25 发布日期:2019-03-01
  • 基金资助:

    项目基金:国家自然科学基金项目(编号:51604205,51774223),湖北省自然科学基金项目(编号:2016CFB268),中央高校基本科研业务费专项资金资助项目(编号:2016IVA046,2017IVB018),武汉理工大学自主创新研究基金项目(编号:2017-ZH-A1-03,2017-ZH-C1-18)。

Research of Chalcopyrite Oxidative Leaching Mechanism by Sodium Chlorite

Li Zhiming,Zhong Shan,Li Yubiao,Chen Yunpeng   

  1. School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
  • Online:2019-01-25 Published:2019-03-01

摘要: 为了实现黄铜矿的高效浸出,研究了酸性条件下亚氯酸钠氧化浸出黄铜矿的适宜工艺条件,并进行了浸出动力学研究和浸出机理分析。结果表明,在亚氯酸钠与黄铜矿的物质的量之比为6、浸出液的pH=4、浸出温度为55 ℃、浸出时间为0.25 h时的铜浸出率为82.36%;亚氯酸钠在酸性条件下高效氧化浸出黄铜矿与亚氯酸钠能分解出氧化活性高的物质ClO2、ClO-3和Cl2有关;亚氯酸钠氧化浸出黄铜矿的过程由界面化学反应控制,活化能为42.69 kJ/mol。

关键词: 黄铜矿, 氧化浸出, 亚氯酸钠, 活化能

Abstract: In order to high efficiently extract copper from chalcopyrite, the parameters of chalcopyrite leaching experiment by sodium chlorite under acidic condition were studied. Meanwhile, the leaching kinetics and mechanism were investigated. The leaching results showed that the Cu extraction was up to 82.36% when the molar ratio of sodium chlorite to chalcopyrite was 6, solution pH was 4, leaching temperature and time were 55 ℃ and 0.25 h respectively. The oxidizing leaching of chalcopyrite can be obviously enhanced due to the decomposition of sodium chlorite to generate strong oxidizing substances such as ClO2, ClO-3 and Cl2 in acid solution. In addition, chalcopyrite leaching was controlled by chemical reaction, which was confirmed by the kinetics and activation energy of 42.69 kJ/mol.

Key words: Chalcopyrite, Oxidation leaching, Sodium chlorite, Activation energy