Influence of Water Quality on Sulphide Ore Oxidation and Speciation of Sulphur Anions during Autogenous Milling

Earlier studies at the Kevitsa Cu-Ni concentrator plant have indicated that seasonal variations of properties process water affect oxidation surface minerals, and further, pentlandite flotation performance. However, it is not clear whether differences in performance are solely due to changes mineral oxidation, and/or also oxidation-induced aqueous phase pulp. This paper investigates effects ore on slurry. A systematic study was formulated monitor related mill circuit plant. The timed coincide with a seasonally observed drop plant’s performance, which happens during summer months (June, July, August). Both physicochemical parameters, as well sulphur oxyanions water, discharge, hydrocyclone overflows were monitored. Also, bubble size selected rougher cleaner cells results show season-related cause chemistry circuit. increased concentration reduced species discharge an indication extensive milling. reacts change. findings confirm consequences expected, based theory observable downstream milling Based these results, yet possible say poor caused by or slurry after needs both find ways limit rates summer, consider installing more robust frother, capable maintaining efficacy warm season. this may help develop enable timely response recycled quality, prevent harmful impacts flotation. former could be achieved lowering temperature air, whereas latter mean using different frother.