Abstract: A lowgrade copper-nickel ore from Guangxi contains Cu 0.11％and Ni 0.18％, which mainly exist in the form of pentlandite and chalcopyrite respectively. Under the detail conditions testes, got the better dressing indexes by the untied flowsheet of flotation-magnetic separation. The yield of copper-nickel concentrate achieved 1.83%, the grade of Cu, Ni, Co, Ag each was 4.81%, 7.34%, 0.31%, 230.60 g/t; the recovery of Cu, Ni, Co, Ag each was 88.69%, 80.12%, 55.76%, 78.75%.

Key words: Low-grade copper-nickel ore, Flotation, Magnetic separation, United technology