Abstract
AbstractBatch rougher flotation study was conducted on copper tailings from Benambra to compare flotation kinetics at optimised condition, using Melbourne, mine, dewnised and recycled waters. The results showed an enhanced copper grade and recovery when deionised water was used as compared to when Melbourne, mine or recycled waters were used, the greaterflotation rate was due to the near absence of dissolved organic and inorganic species. Fresh mine water gave better copper grade and recovery and an enhanced flotation rate as compared to Melbourne water. Improved flotation kinetics in first recycling of Melbourne and deionised waters were observed. Three recycles of mine water in the flotation process indicated a steady‐state rate for copper tailings. This was not valid for Melbourne and deionised waters where flotation was inhibited successively by three water‐recycles. Organic species such as thio‐phosphates and carbamates released from residual reagents in water, and inorganic speciesfrom the tailing sample that dissolves, are responsible for altering water quality and hence the flotation kinetics.
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