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Ni/Co–Cu Sulphide Ores, Key Contributors to Sustainability: A Review of Applications and Processing Challenges

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Proceedings of the 61st Conference of Metallurgists, COM 2022 (COM 2022)

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Abstract.

Nickel and cobalt are among the strategic metals contributing to sustainability. Recent statistics have indicated that their domestic production gradually declined, although Canada still ranks among the top five countries in nickel production linked to the co-production of cobalt and precious metals. The sustainability of nickel and cobalt production requires efficient processing, whether this relates to recycling from secondary sources or primary resources. One of the main driving forces in the growing demand for nickel is related to the increasing importance of nickel and cobalt-bearing lithium-ion electric-car batteries to reduce dependence on fossil fuels as part of a sustainable future. In addition to their use for stainless steel production, alloys of these metals are essential for solar power facilities towards the same goals.

Nickel-copper sulphide ores in Canada are in the category of complex sulphides since they are available with large quantities of pyrrhotite which is undesirable from an environmental point of view. Thus, the rejection of pyrrhotite in the processing of Ni-Cu sulphide ores will continue to be important in the Canadian mining industry due to its dominance in the disseminated matrix of these ores. In addition, in some cases, these ores also have serpentines and talc problems. Challenges related to mineralogy are reviewed together with reagent functionality related to pyrrhotite rejection as well as non-sulphide gangue, specifically talc and serpentines with an overview of promising new reagents.

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Acknowledgements

The authors are thankful for continued support and funding from the Natural Sciences and Engineering Research Council of Canada (NSERC) and for the sponsorship of S. Arslangil by the general directorate of mineral research and exploration of Turkey.

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Kelebek, S., Arslangil, S., Gibson, C.E. (2023). Ni/Co–Cu Sulphide Ores, Key Contributors to Sustainability: A Review of Applications and Processing Challenges. In: Proceedings of the 61st Conference of Metallurgists, COM 2022. COM 2022. Springer, Cham. https://doi.org/10.1007/978-3-031-17425-4_105

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