Impact of Recycled Process Water on Electrochemical Reactivity of Sulphide Ore

The Kevitsa Cu–Ni sequential flotation process is characterised by poor nickel recovery during summer periods (May–September). Evidently, the water matrix in different from that other seasons; however, Cu performance scarcely affected changes across seasons. Increasingly quality was generated through a grinding-and-dissolution protocol and its impact on electrochemical reactivity of sulphide ore studied. main objective this approach to mimic increasingly plant emanating closed-process loop. Dissolved oxygen demand tests were conducted using varying dissolution loops. effect temperature fine grind oxidation rates also investigated. study coupled with EDTA metal ion extraction xanthate adsorption tests. These showed number loops, which has an quality, direct rate ore. A high both increase most reactive first 10–20 min after milling. Furthermore, are driven amount pyrrhotite ore, chalcopyrite being least reactive, as indicated data. Xanthate impacted grind. combined expected influence behaviour minerals. period attributable unfavourable accelerates period.