At the same time, NH4Cl roasting method possesses selectivity to chlorinating Fe so the Fe content in leaching solution is very low.It is advantageous to recover RE in subsequent purification.

• 同时氯化铵焙烧法对铁的氯化具有选择性，焙砂热水浸出得到的浸取液，铁的含量很低，因此采用该法分解氟碳铈矿更有利于后续过程的稀土净化。