Abstract: A high mud and high oxidation copper ore form Congo(Kinshasa) with copper grade of 3.70%，and the oxidation rate reach 75.81%.Copper mainly exists in the form of malachite，follows by chrysocolla and chalcocite.The technical conditions for flotation of the ore are explored．The results show that with the grinding fineness of 70% -74 μm，via one stage flotation for desliming，two roughing，two cleanings，and two scavenging sulfuration floatation，copper concentrate with copper grade of 26.82% and recovery of 72.48% was gained.The flotation tailings with which the main copper minerals is chrysocolla can be processed by acid leaching process．With sulfuric acid dosage of 100 kg/t，liquid-solid ratio of 3∶1 and leaching time of 1.5 h，the copper leaching rate of 86.84% is obtained relative to tailings，and the total copper recovery of the whole process of flotation+ acid leaching is 96.38%．

Key words: High mud and high oxidation rate copper ore, Pre-desliming, Sulfidizing flotation, Acid leaching