The mineral processingMineral Processing industry faces new challenges due to decreasing ore gradesGrade and increasing copperCopper ore complexity. The process of extracting copperCopper from copper sulfideCopper sulfides ore is extremely intricate and specifically chalcopyriteChalcopyrite, the most common copper-bearing mineral, needs a strong oxidizingOxidizing reagent to rupture its resistant structure. RoastingRoasting with additivesAdditives is an effective pre-treatment for chalcopyriteChalcopyrite as it transforms the mineral into a more leachable form, overcoming the limitations of direct leachingLeaching, which is hindered by passivating layers that form on the mineral surface, reducingReducing copper recoveryCopper recovery. Therefore, this research focuses on recovering copperCopper from flotationFlotation concentrateConcentrate using combined additive roastingAdditive roasting and leachingLeaching methods. Experiments were conducted using a copperSulfide sulfideCopper sulfides ore sample containing chalcopyriteChalcopyrite (CuFeS2) as the main Cu-bearing mineral and gangue minerals such as quartz (SiO2), pyrite (FeS2) and feldspar (К[AlSi3O8]). X-ray fluorescence and microwave plasma atomic emissionEmissions spectroscopy showed 0.94% Cu and 4.14% Fe. Optimal flotationFlotation conditions (7 min, 100 g/t PAX, 1.5 L/min air, pH 10, −75 µm particle size) yielded a copperCopper concentrateConcentrate with 5.6% Cu and 93.25% recoveryRecovery which was used as a feed sample in this study. RoastingRoasting of copperCopper concentrateConcentrate with additivesAdditives like KCl and NaOH at different ratios, roasting temperature and time was performed and atmospheric leachingAtmospheric leaching parameters such as sulfuric acidSulfuric acid concentration, temperature, time and pulp density were examined. Results showed that roastingRoasting at 600 °C resulted in Cu dissolutions of 94% with KCl (1:0.1) for 2 h and 93% with NaOH (1:0.05) for 1 h in 0.1 M sulfuric acidSulfuric acid solution at 25° C with ironIron dissolutionDissolution staying below 10% by atmosphericLeaching leachingAtmospheric leaching. As a result, copperCopper concentrateConcentrate roastingRoasting with NaOH proved to be beneficial, providing faster reaction kineticsKinetics, improved environmental safetySafety and greater economic efficiencyEfficiency.