Abstract: In light of the characteristics of certain refractory copper ore from Jiangxi, investigation was made on its rational beneficiation process and new reagent regime. The results show that a process consisting of a partial copper preferential flotation and the regrinding and flotation of mixed concentrate can greatly improve the separation indexes of this refractory copper ore, with the copper concentrate grading 21.15% at a recovery of 83.62%. The continuous industrial test of this new process shows a copper grade increase of 1.07%and recovery increase of 18.33% compared with those of the original process

Key words: Refractory copper ore, Copper-sulphur separation, Regrinding of mixed concentrate