CopperCopper oxide oresOxide ore are depleting or running short in heap leachingHeap leaching process, releasing existing SX-EW capacity for additional PLSPregnant Leach Solution (PLS) feed. Some oxidic ore mines have already converted the operationsOperation to process transition ores, i.e., mixed sulfideSulfide and oxide oresOxide ore in existing heap leachingHeap leaching facilities, but the copper recoveryCopper recovery rate, especially from primary sulfidesPrimary sulfides, remains unsatisfactory. CopperCopper pressure oxidation process (Cu POXPOX) offers an effective and straightforward way to refine impure and chalcopyritic sulfidic copper concentratesCopper concentrate to produce substitute pregnant leach solution (PLSPregnant Leach Solution (PLS)) for the existing SX-EW plants to compensate the depleting oxidic heap leachingHeap leaching production. The sulfuric acidSulfuric acid generated in the Cu POXPOX leachingLeaching process can be utilized by recirculating the PLSPregnant Leach Solution (PLS) in the existing heap leachingHeap leaching. ImpuritiesImpurity like ironIron and arsenicArsenic have limited solubilitySolubility in Cu POXPOX leachingLeaching conditions. Typical precipitate for arsenicArsenic is scoroditeScorodite and ironIron precipitates as hematiteHematite and basic ironIron sulfatesSulfate. The complete copperCopper pressure leachingPressure leaching process concept comprises autoclaveAutoclave pressure leachingPressure leaching for sulfidic copper concentrateCopper concentrate to produce copperCopper containing pregnant leach solution (PLSPregnant Leach Solution (PLS)). The leachingLeaching process is followed by a neutralization step (or use of the acid in heap leachingHeap leaching facility), copper solvent extractionCopper solvent extraction, and electrowinningElectrowinning operationsOperation. In addition, the flowsheet can be modified to recover goldGold and silverSilver from the Cu POXPOX leach residue.