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

doi:10.1016/j.cjche.2019.10.005

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (3): 743-748.DOI: 10.1016/j.cjche.2019.10.005

• Separation Science and Engineering • 上一篇下一篇

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

Mojtaba Masdarian¹, Asghar Azizi¹, Zahra Bahri²

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

收稿日期:2019-06-28 修回日期:2019-10-12 出版日期:2020-03-28 发布日期:2020-06-11
通讯作者: Asghar Azizi
基金资助:
The authors would like to appreciate the AbbasAbad copper mine and Shahrood University of Technology for their financial support during this research.

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

Mojtaba Masdarian¹, Asghar Azizi¹, Zahra Bahri²

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

Received:2019-06-28 Revised:2019-10-12 Online:2020-03-28 Published:2020-06-11
Contact: Asghar Azizi
Supported by:
The authors would like to appreciate the AbbasAbad copper mine and Shahrood University of Technology for their financial support during this research.

摘要/Abstract

摘要： Mechanochemical sulfidization of a mixed sulfide/oxide copper ore by co-grinding with sulfur and additives including Mg(NO₃)₂ and Fe(NO₃)₃ 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.

关键词: Sulphide/oxide copper ore, Floatability, Mechanochemical sulfidization, Reductive additives, Recovery

Abstract: Mechanochemical sulfidization of a mixed sulfide/oxide copper ore by co-grinding with sulfur and additives including Mg(NO₃)₂ and Fe(NO₃)₃ 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.

Key words: Sulphide/oxide copper ore, Floatability, Mechanochemical sulfidization, Reductive additives, Recovery

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]. 中国化学工程学报, 2020, 28(3): 743-748.

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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

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

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