Abstract: In order to provide basis for rational development of SODIMIKA surface copper-cobalt oxide ores in Democratic Republic of Congo,a detailed process mineralogy study was carried out for the ores.The results showed that:① The main recoverable elements in the ore are copper and cobalt,the contents of which are 2.15% and 0.19%,respectively.The copper mainly exists in the form of copper in chrysocolla and free copper oxide,and cobalt mainly exists in the form of cobalt oxide and cobalt sulfide.② The main metal minerals in the ore are chrysocolla,malachite,hydrocobalt,melaconite,libethenite,manganous-copper-cobalt hydrated oxide,hematite and limonite.Gangue minerals mainly include quartz,muscovite,chlorite and talc.③ The structure types of the ores are mainly composed of semi-automorphic and heteromorphic granular structure,self-shaped fibrous structure,scaly structure and colloidal structure.The main texture types are massive texture,followed by brecciform texture and crusted texture.④ Malachite and hydrocobalt in the ore have the characteristics of uneven medium fine disseminated,while melaconite,libethenite,chrysocolla and manganous-copper-cobalt hydrated oxide are fine disseminated.⑤ The main forms of copper minerals are malachite,chrysocolla,melaconite,libethenite and manganous-copper-cobalt hydrated oxide.The content of combined copper oxide minerals is high,and associated with limonite seriously.The independent mineral of cobalt is hydrocobalt with the fine disseminated grain size,and distributed in the independent irregular granular.And it is complicatedly combined with malachite.It is recommended to adopt the floatation-magnetic separartion combination process to recover some free copper oxide minerals in coarse-grained monomers by flotation and copper-cobalt closely combined with ferric manganese oxide of higher specific susceptibility by magnetic separation.

Key words: copper-cobalt oxide ores, deep oxidation, dissemination characteristic, particle size distribution, heterogenite, combined process