Investigation on the flotation recovery of copper sulphosalts through an integrated mineralogical approach

Document identifier: oai:DiVA.org:ltu-76265
Access full text here:10.1016/j.mineng.2018.10.006
Keyword: Engineering and Technology, Multidisciplinär geovetenskap, Ore Geology, Automated mineralogy, Principal component analysis, Flotation, Copper sulphosalts, Geometallurgy, Geologi, Geology, Geovetenskap och miljövetenskap, Environmental Engineering, Naturvetenskap, Geosciences, Multidisciplinary, Earth and Related Environmental Sciences, Natural Sciences, Mineral- och gruvteknik, Naturresursteknik, Teknik och teknologier, Mineral and Mine Engineering, Malmgeologi
Publication year: 2019
Relevant Sustainable Development Goals (SDGs):
SDG 9 Industry, innovation and infrastructureSDG 3 Good health and wellbeing
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

Investigation on the flotation behaviour of enargite (Cu3AsS4) and tennantite ((Cu, Fe)12As4S13) during selective copper flotation was performed using an integrated mineralogical approach. To this end, samples taken from a production block at the Chelopech mine were subjected to a laboratory scale flotation and products characterized through multi-element chemical analyses and mineral mapping using a SEM-based automated mineralogy. Chemistry, modal mineralogy, copper-sulphosalts’ liberation and associations were quantified. Principal component analysis (PCA) was employed to look for relationships between mineralogical features and flotation recovery. High variability in head copper grade was observed in the studied block, with deportment results attributing it to the varied content of enargite and tennantite. Chalcopyrite content was low in the majority of the samples. The close association and the frequently observed interlocking of pyrite and Cu-sulphosalt grains can explain pyrite (and gold) recovery during copper cleaner flotation. Linear equations based on PCA results allow the prediction of Cu-sulphosalts’ recovery with a root mean square error of ±1.32%.

Authors

Jonathan Rincon

University of Liege, GeMMe – Minerals Engineering and Recycling, Sart-Tilman Campus-B52, Liège, 4000, Belgium
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Stoyan Gaydardzhiev

University of Liege, GeMMe – Minerals Engineering and Recycling, Sart-Tilman Campus-B52, Liège, 4000, Belgium
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Lachezar Stamenov

Dundee Precious Metals Chelopech, Village of Chelopech, 2087, Bulgaria
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