关键词: 细粒锡石, 浮选, 重选

Abstract: Tin grade of copper-sulfide flotation tailings from Kafang Company in Gejiu County，Yunxi，is 0.35%.Cassiterite，the main tin bearing mineral，is micro-fine disseminated and closely disseminated with gangue minerals which have closely floatability and density with cassiterite.Therefore，tin concentrate of flotation assaying about 6% tin and recovery of about 50% was obtained through the single gravity separation process，In order to efficiently recover tin resources from the tailings，the flotation-gravity separation process was used for dressing experiment.Results showed that through the process of one roughing，two cleanings，two scavenge closed circuit flotation process tin concentrate with 8.26% tin and recovery of 83.51% was obtained.Gravity concentrate with 40.70% tin and recovery of 68.95% was obtained by once shaking table gravity separation dealing with flotation tin concentrate，as well as gravity tailings with 1.72% tin and recovery of 14.56%.The tailings of gravity separation can be used as raw material for tin recover via fuming process.Therefore，the technological process is a high efficient process to recover tin from tailings.

Key words: Fine cassiterite, Flotation, Gravity separation