The quality of copper concentratesCopper concentrate is crucial to ensure stable operationsOperation in the copper smeltingCopper Smelting processes where the concentration of refractoryRefractories elementsElements or compounds in the smeltingSmelting slagSlag must be controlled within an acceptable level. Al2O3 and MgO are typical refractoryRefractories species contained in copper concentratesCopper concentrate, originating from gangue minerals such as albite, and chlorite. High levels of Al2O3 and MgO in copper smeltingCopper Smelting process may precipitate spinel crystals to form an accretionAccretion layer on the moltenMolten slagSlag/matteMatte interface, leading copperCopper losses into the slagSlag. The levels of Al2O3 and MgO in copper concentrateCopper concentrate sometimes drastically change even when produced from the same miningMining facility, especially when there are variations in the ratios of copperCopper mineral such as chalcopyriteChalcopyrite (CuFeS2) and borniteBornite (Cu5FeS4). In the present study, laboratory-scale column-flotationFlotation equipmentEquipment was used to develop an operating guideline for cleaner flotationFlotation that is independent of the type of copperCopper minerals, in order to maintain or lower the levels of impuritiesImpurity in concentrateConcentrate. The effects of various column flotationFlotation parameters, including froth volume, residence time, and bias, which is defined as the difference between the flow ratesFlow rate of wash water and concentrateConcentrate water, were investigated. The results showed that Al2O3 and MgO bearing gangue minerals were effectively removed from the concentratesConcentrate by controlling the bias to 0.01–0.015 cm/s while maintaining consistent copper recoveryCopper recovery.