Mechanochemical sulfidization of a mixed oxide-sulphide copper ore by co-grinding with sulfur and its effect on the flotation efficiency

Mojtaba Masdarian; Asghar Azizi; Zahra Bahri

doi:10.1016/j.cjche.2019.10.005

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Mechanochemical sulfidization of a mixed oxide-sulphide copper ore by co-grinding with sulfur and its effect on the flotation efficiency

Separation Science and Engineering | Updated：2026-01-06

- Mechanochemical sulfidization of a mixed oxide-sulphide copper ore by co-grinding with sulfur and its effect on the flotation efficiency
- Chinese Journal of Chemical Engineering Vol. 28, Issue 3, Pages: 743-748(2020)
- Affiliations：
  
  1. Faculty of Mining, Petroleum and Geophysics, Shahrood University of Technology, Shahrood,Iran
  2. Department of Control and Modeling of Mineral Processing Systems, Institute of Mineral Processing, ACECR at Tarbiat Modares, Tehran,Iran
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.10.005
  CLC：
- Published：2020
- Accepted：
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Mojtaba Masdarian, Asghar Azizi, Zahra Bahri. Mechanochemical sulfidization of a mixed oxide-sulphide copper ore by co-grinding with sulfur and its effect on the flotation efficiency[J]. Chinese Journal of Chemical Engineering, 2020, 28(3): 743-748.
DOI：

Mojtaba Masdarian, Asghar Azizi, Zahra Bahri. Mechanochemical sulfidization of a mixed oxide-sulphide copper ore by co-grinding with sulfur and its effect on the flotation efficiency[J]. Chinese Journal of Chemical Engineering, 2020, 28(3): 743-748. DOI： 10.1016/j.cjche.2019.10.005.

摘要

Abstract

Mechanochemical sulfidization of a mixed sulfide/oxide copper ore by co-grinding with sulfur and additives including Mg(NO

)

and Fe(NO

)

salts and iron

aluminum and magnesium powders was investigated for the first time. Also

the influence of sulfidization during the wet-milling process was examined on the separation efficiency and recovery of copper in detail. The results demonstrated that co-grinding with sulfur solely had the best flotation performance at the value of 0.5 wt.% and it was attributed to the possible existence of S-O bonding on copper oxides surfaces. In addition

adding magnesium nitrate salt

magnesium powder

iron nitrate salt and aluminum powder as additive associated with 0.5 wt% sulfur into ball milling caused the flotation improvement at the amounts of 0.2 wt%

0.2 wt%

0.5 wt% and 0.5 wt%

respectively. Also

the effect of grinding time and sulfidization pH with 0.5 wt% sulfur solely was determined and pHs of 7.5 to 8.5 gave the best results. The highest recovery (75.76%) and separation efficiency (63.44%) were achieved at pH of 7.5 and 8.5

respectively.

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