Abstract: The process mineralogy study was made to identify the mineral composition, copper and nickel occurrence forms of a copper nickel ore from North Korea, its structure and texture, and the dissemination characteristics of its main minerals. The results show that the copper and nickel mainly occur in the forms of pentlandite and pyrite that are easy to float. However, other sulfides have close and complex dissemination relation with pentlandite and pyrite, bringing unfavorable effect on the separation of copper and nickel.

Key words: Copper-nickel ore, Process mineralogy, Pentlandite, Pyrite, Mineral dissemination characteristics