Abstract: A copper-tin ore from Western China belongs to complex refractory ores. In light of its process mineralogy characteristics, flotation is used to recover the sulfide minerals from it, which can obtain a copper concentrate grading more than 15.81% at a recovery of 73.14% and a sulfur concentrate grading 34.59% at a recovery of 70.99%，effectively recovering its copper and sulfur. Then, gravity separation-flotation process is adopted to recover the tin from the tailings of copper flotation, which can get a tin concentrate grading 35.02% at a 20.95% recovery and three kinds of tin middlings. It is shown that the process of flotation-gravity separation-flotation can be used to recover the copper, tin and sulfur from this copper-tin ore.

Key words: Copper-tin ore, Cassiterite, Chalcopyrite, Cassiterolamprite, Flotation-gravity separation-flotation process