Abstract:Taking a tin-rich niobium-tantalum crude concentrate in Yichun, Jiangxi Province as the research object, in order to further separate and recover niobium, tantalum and tin, X-ray fluorescence spectroscopy (XRF) and automatic mineral analysis system (AMICS) were used to analyze in detail the element and mineral composition of the sample. Process mineralogical characteristics such as the occurrence state of minerals. The results show that the sample Ta2O5 content is 18.05%, Nb2O5 content is 9.95%, SnO2 content is 45.35%, the main mineral composition is niobium tantalite, cassiterite, magnetite and bismuth sulfide tellurite. Niobium and tantalum mainly exist in the form of niobium tantalite with a content of 38.44%, and tin exists in the form of cassiterite with a content of 47.35%. Columbium tantalite and cassiterite are produced in the ore in the form of single crystal semi-automatic agglomerates and metasomatous symbiosis irregular granular shapes, both of which have a close symbiotic and encapsulation relationship with magnetite. The dissociation degree of niobium tantalite monomer is 50.39%, the dissociation degree of cassiterite monomer is 73.34%, and the dissociation degree levels are mainly distributed in the range of 80-100%. The particle sizes of niobium tantalite and cassiterite single minerals are concentrated in the range of 26.52～89.19 μm, and the cumulative occupancy rates in this interval are 81.49% and 85.99%, respectively. Based on the characteristics of the ore and minerals, it is recommended to use the flotation method to realize the recovery and utilization of minerals through the combined use of high-efficiency collectors, activators and inhibitors.