SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (9): 1814-1821.DOI: 10.1016/j.cjche.2018.02.014

• Separation Science and Engineering • 上一篇    下一篇

Separation of chalcopyrite and pyrite from a copper tailing by ammonium humate

Cuicui Lü1,2, Yongliang Wang1, Peng Qian1, Ya Liu1,2, Guoyan Fu1,2, Jian Ding1,2, Shufeng Ye1, Yuanfa Chen1   

  1. 1 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2016-11-28 修回日期:2018-01-10 出版日期:2018-09-28 发布日期:2018-10-17
  • 通讯作者: Shufeng Ye,E-mail addresses:sfye@ipe.ac.cn;Cuicui Lü,E-mail addresses:cclv@ipe.ac.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China (51202249), the National High Technology Research and Development Program of China (2011AA06A104), and the National Science & Technology Pillar Program during the 12th Five-year Plan Period (2012BAB08B04).

Separation of chalcopyrite and pyrite from a copper tailing by ammonium humate

Cuicui Lü1,2, Yongliang Wang1, Peng Qian1, Ya Liu1,2, Guoyan Fu1,2, Jian Ding1,2, Shufeng Ye1, Yuanfa Chen1   

  1. 1 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-11-28 Revised:2018-01-10 Online:2018-09-28 Published:2018-10-17
  • Contact: Shufeng Ye,E-mail addresses:sfye@ipe.ac.cn;Cuicui Lü,E-mail addresses:cclv@ipe.ac.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China (51202249), the National High Technology Research and Development Program of China (2011AA06A104), and the National Science & Technology Pillar Program during the 12th Five-year Plan Period (2012BAB08B04).

摘要: Copper tailings constitute a large proportion of mine wastes. Some of the copper tailings can be recycled to recover valuable minerals. In this paper, a copper tailing was studied through the chemical analysis method, X-ray diffraction and scanning electron microscope-energy dispersive spectrum. It turned out that chalcopyrite (Cu) and pyrite (S) were the main recoverable minerals in the tailing. In order to separate chalcopyrite from pyrite in low pulp pH, ammonium humate (AH) was singled out as the effective regulator. The depression mechanism of AH on the flotation of pyrite was proved by FTIR spectrum and XPS spectrum, demonstrating that there was a chemical adsorption between AH and pyrite. By Response Surface Methodology (RSM), the interaction between AH, pulp pH and iso-butyl ethionine (Z200) was discussed. It was illustrated that the optimal dosage of AH was 1678 g·t-1 involving both the recovery of Cu and S. The point prediction by RSM and the closed-circuit flotation displayed that the qualified Cu concentrate and S concentrate could be obtained from the copper tailing. The study indicated that AH was a promising pyrite depressor in the low pulp pH from copper tailings.

关键词: Copper tailings, Ammonium humate, Depression, Response Surface Methodology

Abstract: Copper tailings constitute a large proportion of mine wastes. Some of the copper tailings can be recycled to recover valuable minerals. In this paper, a copper tailing was studied through the chemical analysis method, X-ray diffraction and scanning electron microscope-energy dispersive spectrum. It turned out that chalcopyrite (Cu) and pyrite (S) were the main recoverable minerals in the tailing. In order to separate chalcopyrite from pyrite in low pulp pH, ammonium humate (AH) was singled out as the effective regulator. The depression mechanism of AH on the flotation of pyrite was proved by FTIR spectrum and XPS spectrum, demonstrating that there was a chemical adsorption between AH and pyrite. By Response Surface Methodology (RSM), the interaction between AH, pulp pH and iso-butyl ethionine (Z200) was discussed. It was illustrated that the optimal dosage of AH was 1678 g·t-1 involving both the recovery of Cu and S. The point prediction by RSM and the closed-circuit flotation displayed that the qualified Cu concentrate and S concentrate could be obtained from the copper tailing. The study indicated that AH was a promising pyrite depressor in the low pulp pH from copper tailings.

Key words: Copper tailings, Ammonium humate, Depression, Response Surface Methodology