Abstract: Comprehensive utilization of associated resources is a critical initiative for green mine construction and energy conservation.In order to achieve the resource utilization for a rubidium-bearing granite ore with tantalum,niobium and lithium,a detailed study on comprehensive recovery experimental was carried out.The ore has Ta₂O₅ grade of 42.15 g/t，Nb₂O₅ grade of 184.00 g/t,Li₂O grade of 0.086%.Tantalum and niobium occurs in niobite,and lithium mainly occurs in zinnwaldite.The beneficiation process of magnetic separation priority recovery of niobite and zinnwaldite-gravity concentration recovery of tantalum and niobium in magnetic concentrate-floating lithium in gravity tailings was determined.The results showed that under the condition of grinding fineness of -0.074 mm accounting for 61.81%,the tantalum-niobium concentrate containing 11 650 g/t Ta₂O₅、50 400 g/t Nb₂O₅ was obtained by low intensity magnetic separation iron removal,high intensity magnetic separation and two stage shaker table gravity separation.The recovery rate of tantalum and niobium were 38.46% and 38.11%,respectively,and the concentration factor were more than 270.Using sodium carbonate and sodium silicate as adjusting agents,oxidized paraffin soap and dodecylamine as cation-anion combination flotation collectors,the flotation was carried out on tailings of gravity concentration for selecting zinnwaldite.After one roughing,one cleaning and one scavenging,the zinnwaldite concentrate with Li₂O grade of 1.837% and recovery rate of 50.84% was obtained.The recovery and enrichment of associated tantalum-niobium-lithium are realized,which provides a reference for the industrial utilization of this type of ore.

Key words: niobite, zinnwaldite, comprehensive recovery, magnetic separation-gravity concentration-flotation combined process