富磷灰石复杂稀土矿石工艺矿物学研究

Process Mineralogy of an Apatite-Rich Complex Rare Earth Ore

通过化学分析、显微镜和国际先进的MLA矿物自动检测技术等手段,对某富磷灰石的复杂稀土矿石进行工艺矿物学研究。研究结果表明,本矿石稀土矿物主要为氟碳铈矿和褐帘石,其次为独居石和氟碳钙铈矿。此外,磷灰石中富含稀土,磷灰石中稀土占原矿总稀土量26%以上。本稀土矿石性质决定仅采用物理选矿方法不能得到商品稀土精矿,可采取浮选流程和浮磁联合流程分别获取磷灰石精矿和稀土精矿,然后再通过焙烧浸出工艺提取稀土。

Process mineralogy of an apatite-rich com- plex rare earth ore was investigated by chemical analy- sis, microscope and international advance automatic quantitative mineral technology MLA. The results in- dicated that the rare earth minerals mainly were bast- naesite and allanite, secondly were monazite and para- site. In addition, there was a large quantity of rare earth existed in apatite, which occupied above 26% of total rare earth in the crude ore. It was decided that the commercial rare earth concentrates cannot be got only using physical processing according to the proper- ties of this rare earth ore, so flotation separation and flotation-magnetic separation combination could be a- dopted to separately get apatite concentrates and rare earth concentrates, and then roasting and leaching could be adopted to extract rare earth elements.