Abstract:For a tantalum niobium rare polymetallic ore in Inner Mongolia, Detailed process mineralogy research has been carried out by optical thin section microscopy, X-ray diffraction analysis, scanning electron microscopy, energy spectrum analysis, electron probe analysis and other methods,it is found that the metal minerals are mainly tantalum niobium iron ore.Through process test and process parameter test, the combined beneficiation and metallurgy process of "primary grinding - strong magnetic separation - grading shaking table - recovery of tantalum and niobium from shaking table concentrate - acid washing to iron removal -recovery of lithium rubidium mica from shaking table tailings - recovery of feldspathic mica from strong magnetic tailings determined,finally we obtained tantalum niobium concentrate 1 with (Ta, Nb) 2O5 grade of 60.15% and recovery rate of 21.70%, tantalum niobium concentrate 2 with (Ta, Nb) 2O5 grade of 30.35% and recovery rate of 3.17%; lithium rubidium mica concentrate 1 with Li2O grade of 0.89% and recovery rate of 58.98% (Rb2O grade of 0.34%, recovery rate of 11.70% and mica content of 92%) ; lithium rubidium mica concentrate 2 with Li2O grade of 0.60% and recovery rate of 5.59% (Rb2O grade of 0.28%, recovery rate of 1.35%, mica content of 93%);feldspar concentrate with Na2O grade of 6.88%, recovery rate of 77.95%, K2O grade of 2.60%, and recovery rate of 68.30%,the feldspar concentrate conforms to the qualified product grade in the enterprise standard (QB/T1636-1992).