东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (1): 81-85.DOI: 10.12068/j.issn.1005-3026.2015.01.018

• 材料与冶金 • 上一篇    下一篇

电沉积回收氰化尾液中铜和氰化物的研究

高腾跃1， 刘奎仁1， 韩庆1， 徐滨士2   

  1. (1.东北大学 材料与冶金学院， 辽宁 沈阳110819; 2.装甲兵工程学院 装备再制造技术国防重点实验室， 北京100072)
  • 收稿日期:2013-11-27 修回日期:2013-11-27 出版日期:2015-01-15 发布日期:2014-11-07
  • 通讯作者: 高腾跃
  • 作者简介:高腾跃(1987-)，男，山东荣成人，东北大学博士研究生; 刘奎仁(1967-)，男，辽宁北镇人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51174062)

Study on Electrodeposition Recovery of Copper and Cyanide from Cyanide-Containing Wastewater

GAO Teng-yue1， LIU Kui-ren1， HAN Qing1， XU Bin-shi2   

  1. 1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China; 2. National Key Laboratory for Remanufacturing， Academy of Armored Forces Engineering， Beijing 100072， China.
  • Received:2013-11-27 Revised:2013-11-27 Online:2015-01-15 Published:2014-11-07
  • Contact: LIU Kui-ren
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摘要： 采用热力学方法计算了高铜高氰溶液中铜氰络合离子的存在形式，以及溶液中各物质的阴极析出电位和阳极氧化电位.理论分析表明，在本实验条件下，溶液中铜氰络离子主要以Cu(CN)3-4和Cu(CN)2-3的形式存在，且以Cu(CN)3-4的形式为主，温度及pH值对铜氰络合离子的存在形式有明显影响.选用合适的电极材料通过电沉积法对氰化尾液进行处理，结果表明，该方法可以在回收废水中铜的同时有效避免氰化物的分解，铜的电流效率可以达到36%以上，溶液中游离氰根浓度由0.096mol/L提高到0.316mol/L.实验证明了采用电沉积法处理高铜高氰氰化尾液的可行性.

关键词: 电沉积, 铜氰废水, 铜氰回收, 黄金矿山, 热力学

Abstract: The forms of copper cyanide species and the data of deposition and oxidation potentials in high-copper and high-cyanide wastewater were determined by thermodynamic calculation and laboratory experiments. The results confirm that copper cyanide species exist mainly as Cu(CN)3-4 and Cu(CN)2-3， where the former is dominant. The form of copper cyanide is significantly affected by temperature and pH. With suitable electrode materials， copper could be recovered and the decomposition of cyanide could be prevented effectively in the electrodeposition process. The maximum current efficiency exceeded 36%， and the concentration of free cyanide increased from 0.096mol/L to 0.316mol/L. The feasibility of treating high-copper and high-cyanide wastewater by electrodeposition is proved by the present experiments.

Key words: electrodeposition, copper-cyanide wastewater, copper and cyanide recovery, gold mine, thermodynamics

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