Abstract: In order to improve the quality and grade of tantalumniobium concentrate,for the problem of similar specific magnetic susceptibility between tourmaline and tantalumniobium ore,similar dielectric constant with tin ore,which results in difficulty in subsequent separation process,combined process test of graded gravity separationmagnetic separationelectric separation was carried out.Niobium and tantalum concentrate containing Nb2O5 48.595%,Ta2O5 4.468% and recovery rates of Nb2O5 59.03% and Ta2O5 5734% were obtained.Through experiments,the mineral recovery rate has reached the domestic leading level,and other useful minerals have also been comprehensively recycled.

Key words: Rough concentrate, Niobite, Combined process of magneticelectrostatic separation, Comprehensive utilization