Abstract:Research on the dissemination characteristics, mineral composition and particle size distribution of the ore of West mine in Bayan Obo under the condition that the grinding fineness is 92.27% of -200 mesh by means of mineral liberation analyzer and chemical analysis, etc. According to the mineralogical characteristics of ore and the feasibility of industrial beneficiation flowsheet, the principle flowsheet is formulated and the condition optimization test is carried out. On this basis, a rare earth rougher concentrate with REO grade of 10.17% and recovery of 86.15% was obtained through rare earth flotation open circuit test using a new rare earth collector CMS-1 and depressant CAM-1. A fluorite concentrate with CaF₂ grade of 90.80% and recovery of 33.00% was obtained by using a new fluorite collector CMK-2 and depressant CMP-1 and CMP-2 through a small closed circuit test in the laboratory, which provides a theoretical basis for the separation of the same type of ores.