Abstract:
The Renli deposit of Hunan Province is a high-grade and super large rare metal deposit in East China with Ta
2O
5 grade of 0.036% and Nb
2O
5 grade of 0.047%. The main useful minerals are tantalum-niobium minerals, beryl, mica, feldspar and the associated minerals such as lepidolite, tourmaline, garnet etc. The Nb-Ta minerals are mainly distributed in albite and quartz in medium-coarse grained muscovite pegmatite as massive, granular, acicular and schistose, and a few are distributed in muscovite, beryl, apatite and tourmaline, with coarse grain size. Beryl is mainly in massive and granular. In this study, the process of recovery of tantalum and niobium with spiral chute and shaker tables and flotation recovery of mica form gravity separation and flotation recovery of beryl form mica flotation tailings were introduced. The Ta
2O
5 recovery of tantalum concentrate (Ta
2O
5 20.36%, Nb
2O
5 19.87%) is 73.53%, BeO recovery of beryllium concentrate (BeO 8.69%) is 65.92%, Rb
2O recovery of mica concentrate (Al
2O
3 24.26%, Li
2O 0.25%, Rb
2O 0.25%) is 67.10%. The research shows that Renli deposit is rich in rare metal and non-metal mineral resources, with the characteristics of high ore quality, easy separation and high recovery. The deposit has high comprehensive recovery rate of rare metals (69.73%) and comprehensive utilization rate of mineral resources (89.60%). It has high economic value of development and utilization, and can be explored efficiently as a Green mine without tailings.