Iwasaki, IwaoTamagawa, T.Fu, N. XKobayashi, M2015-10-072017-04-142015-10-072017-04-141999https://hdl.handle.net/11299/187122A 3-stage fluidizing bed process of chlorination, selective oxidation and sulfur chloride conversion was tested for processing of a chalcopyrite concentrate. It was found that the use of excess oxygen was essential to a stable operation in the oxidation reactor. The oxygen-excess gas will inevitably cause the oxidation of the sulfide concentrate in the chlorination and sulfur chloride conversion reactors. A new flowsheet is proposed to separate the chlorination and the selective oxidation steps with separate flow paths of the fluidizing gases, thereby preventing the passage of oxygen-excess gas in the chlorination and sulfur chloride conversion reactors. The feasibility of the proposed flowsheet was demonstrated in a laboratory-scale fluidizing bed setup.enHydrometallurgyChalcopyriteGeochemical analysisNatural Resources Research InstituteUniversity of Minnesota DuluthTechnical Report