Abstract: The useful minerals in a copper ore of Fujian consist of copper sulfide and pyrite. The conditioning tests on the preferential copper floatation are studied. The results show that final copper concentrate with Cu grade of 22.44% and Cu recovery of 90.23% was obtained by the process of two-roughing，four-scavenging，one-cleaning with rough concentrate and middles back to the flow-sheet in turn. S recovery in copper concentrate was only 17.58%，which creates the conditions for higher sulfur recovery from copper tailings.

Key words: Copper ore, Copper sulfide, Pyrite, Preferential copper floating