蒙古国某低品位稀土矿石选矿试验

蒙古国某低品位稀土矿石REO含量为1.50%,矿石中稀土矿物主要以类质同象形式赋存于磷灰石中,粒度一般为0.005~0.20 mm,矿物结构多为粒状、板状、柱状或片状,采用常规稀土浮选药剂浮选难以获得较好的浮选指标。通过浮选稀土载体矿物磷灰石进而实现稀土浮选的工艺,在磨矿细度-0.074 mm占70%条件下,以碳酸钠为调整剂,水玻璃为抑制剂,F-716为捕收剂,经1粗2精1扫闭路浮选工艺,获得了稀土精矿REO品位11.65%、回收率86.95%的指标,为该稀土矿石资源工业利用提供了依据,可以为我国同类型矿山企业合理开发利用稀土矿产资源提供借鉴。

Beneficiation Experiment on a Low Grade Rare Earth Ore in Mongolia

There is 1.50% REO in a low-grade rare earth ore in Mongolia. The rare earth minerals in the ore are mainly present in the apatite in the form of isomorphism, and the particle size is generally 0.005~0.20 mm. The mineral structure is mostly granular, platy, columnar or flaky structure. It’s difficult to obtain well index by conventional rare earth flotation reagents. By the process of apatite flotation in turn to flotation rare earth, at grinding fineness of 70% passing 0.074 mm, sodium carbonate as regulator, sodium silicate as inhibitor, F-716 as collector, via one roughing two cleaning one scavenging closed circuit flotation process, rare earth concentrate with REO grade of 11.65%, recovery of 86.95% was obtained. The results provide technique basis for utilization of the rare earth ore resources, and can provides reference for the rational development and utilization of rare earth mineral resources in the same type of mining enterprises in China.