【摘要】 蒙古国某难选锂矿中锂的赋存状态复杂，含锂矿物主要有铁锂云母、锂云母、含锂白云母，其锂的占有率分别为48.11%、36.15%、6.94%，含锂白云母Li₂O品位较低，易影响锂精矿品位。矿石中铁锂云母、锂云母和含锂白云母等目的矿物粒度分布不均，且含有绿泥石、高岭石等易泥化矿物，磨矿作业应保证目的矿物达到适宜的粒度及单体解离度，同时避免细泥对矿浆环境影响。通过确定合理的磨矿细度，入浮前脱泥处理，浮选过程中采用抑制剂六偏磷酸钠、高效捕收剂BK426等手段，实现了在中性条件下对含锂矿物的高效选别，显著提高了锂精矿回收率。在原矿Li₂O含量0.75%条件下，闭路试验获得锂精矿Li₂O品位3.74%，回收率76.29%。研究结果可为同类型锂云母资源开发利用提供有益参考。更多还原

【Abstract】 The occurrence of lithium in a refractory lithium mine in Mongolia is complicated. The lithium-containing minerals mainly include zinnwaldite, lepidolite and lithium-containing muscovite, and their lithium occupation rates are 48.11%, 36.15% and 6.94% respectively. The lithium-containing muscovite has a low grade of Li₂O, which easily affects the grade of lithium concentrate. The particle size distribution of target minerals such as zinnwaldite,lepidolite and lithium-containing muscovite in the ore have uneven particle size distribution, and contains chlorite,kaolinite and other easily slimed minerals. During grinding operations, it is necessary to ensure that the target minerals achieve suitable particle size and monomer dissociation, while avoiding the impact of fine mud on the pulp environment. Aiming at this complex and refractory lepidolite ore, through determining reasonable grinding fineness,desliming treatment before flotation, and using inhibitor sodium hexametaphosphate and efficient collector BK426in the flotation process, lithium-containing minerals can be efficiently separated under neutral conditions, and the recovery rate of lithium concentrate can be significantly improved. Under the condition that the Li₂O content of the raw ore is 0.75%, the Li₂O grade of lithium concentrate is 3.74% and the recovery rate is 76.29%. The research results can provide useful reference for the development and utilization of lepidolite resources of the same type.更多还原