Study of Cu Recovery Comparison of Fresh, Stockpiled, and Mixed Ores Processing in Batu Hijau Mine – Sumbawa Island, Indonesia

Batu Hijau mine is one of the mining areas in Indonesia that have been operated for 20 years. The main concentrate product contains primary minerals copper (Cu) and gold (Au). However, not only processing fresh mined ore but also store low-grade stockpile. Therefore, this study compares Cu recovery different stockpile on changes concentration dissolved tailings potentially contaminated environment. Chemical analysis solid uses standard methods by strictly carrying out quality assurance control (QA/QC) procedures to ensure resulting data has high validity. results showed there a slight increase Cu’s solubility liquid fraction decrease when ores were processed from stockpiles. reduction anticipated flotation with controlled potential sulphidisation (CPS) using sodium hydrosulphide (NaHS). Besides, CPS small amount dumped tailings. Hence, can be monitories reduce possible impact