Abstract:
The lepidolite ore in Yifeng area of Jiangxi Province is seriously weathered and the occurrence form of minerals is complex. The theoretical grade of Li
2O in lepidolite is low. In order to realize the efficient recovery of lithium and feldspar from the lepidolite ore, the detail beneficiation test research was carried out. The results showed that the process of desliming-flotation-magnetic separation was adopted. First, the raw ore was deslimed to reduce the cover of fine gangue minerals on the surface of lithium mica. Then, the flotation of lithium mica with highly selective collector ZY could effectively separate lepidolite from gangue minerals. The lepidolite concentrate with Li
2O content of 1.73% and recovery rate of 75.87% was obtained. After iron removal from flotation tailings by high gradient magnetic separation with magnetic field intensity of 1.5 T, the feldspar concentrate with operation yield of 94.31%, Na
2O 5.78%, K
2O 3.08%, Fe
2O
3 0.07% and whiteness of 67.21% could be obtained and used as ceramic material. The process had achieved good beneficiation indexes for the treatment of lepidolite ore, and realized the comprehensive recovery of lepidolite and feldspar.