Abstract: Aiming at such characteristics of the Congo（Kinshasa) refractory copper-cobalt oxide ore as high oxygenation，high binding rate，serious sliming and high content of deleterious impurity(Ca,Mg)，a flowsheet in principle was formulated，i.e.preferential flotation of copper-cobalt sulfide and subsequent flotation of copper-cobalt oxide without desliming,and a dressing-metallurgy combination process was drawn up to deal with the micro-fine middlings accumulating easily in the closed beneficiation of copper-cobalt oxide.Raw ore（Cu 3.10% ) was finally treated by closed test process.Then sulfide concentrator with Cu grade 31.52% and recovery 33.25% and oxide concentrator with Cu grade 23.76% and recovery 47.14% were achieved.By leaching metallurgy middlings in dilute sulfuric acid，6.64% Cu could by recovered and total recovery reached 87.03%.Meanwhile，53.96% associated metal Co was recovered.

Key words: Copper-cobalt oxide ore, Sulfidizing flotation, Sliming, Asynchronous flotation, Dressing-metallurgy combination process