Beneficiation pre-enrichment method for chrysoberyl type beryllium ore

According to the beneficiation pre-enrichment method for the chrysoberyl type beryllium ore, most of carbonate minerals such as calcite and dolomite and gangue minerals such as chlorite and mica are removed through floating and sinking separation, then the stage grinding and stage grading process is adopted, pre-selected beryllium concentrate is obtained, the technological process is simplified, the grinding feeding amount is reduced, and the beneficiation efficiency is improved. Compared with the prior art, the beneficiation method has the advantages that beneficiation grade is improved, carbonate minerals interfering flotation are reduced, fluoride-free agents are adopted in the beneficiation process, influence on flotation environment is reduced, high beryllium concentrate grade and recovery rate can be guaranteed, and cost of ore grinding, agents, equipment loss and the like is reduced in the whole beneficiation process. 本发明提出了一种金绿宝石型铍矿的选矿预富集方法，本发明的方法先通过浮沉分选抛除了大部分方解石、白云石等碳酸盐矿物及绿泥石、云母等脉石矿物，再采用阶段磨矿阶段选别流程，获得