A comparative study on the influence of mono, di, and trivalent cations on the chalcopyrite and pyrite flotation

Mineral separation by flotation is a water-intensive process; thus, recycling and reusing the process-water have essential environmental and financial impacts for ore beneficiation plants. The recycled water contains different ions, which affect flotation responses. Several investigations focused on the effects of monovalent and divalent ion contents of the recycled water and seawaters on the flotation recovery. However, there is a gap in exploring the influence of trivalent ions on the metallurgical responses of sulfide flotation. This work is going to fill this gap by exploring and comparing the effect of Nathorn, Mg2+, and Al3+ on the chalcopyrite and pyrite's flotation responses. Different flotation experiments and surface analyses were considered to assess and compare these multivalent cations' impacts on the flotation responses. Outcomes indicated that compared to Nathorn and Mg2+, Al3+ could significantly change both minerals' surface properties, relatively improved pyrite's floatability, and decreased the chalcopyrite recovery. Adsorption of Al(OH) 3(s) on the minerals surface and the collector - Al(OH)(3)(s) aggregate could explain these variations. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

Mineral separation by flotation is a water-intensive process, and recycling the process water is important for environmental and financial reasons; the presence of different ions in recycled water can affect flotation recovery; this study explores the impact of trivalent ions on sulfide flotation, specifically the effects of Nathorn, Mg2+, and Al3+ on chalcopyrite and pyrite's flotation responses.