摘要
提出氯化铵焙烧法提取氟碳铈矿中稀土新的工艺路线，考察反应温度、时间、氯化铵用量及固氟添加剂对稀土回收的影响。在焙烧温度５００℃，焙烧时间１ｈ，氯化铵／矿重＝０．５及固氟添加剂存在的条件下，稀土回收率达到８４％。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。
A novel process was put forward to recover RE by NH4Cl roasting method from bastnasite. Temperature, time of roasting, N-H4Cl amount and additive to fix fluorine in recovering RE are determined. RE recovery can reach 84% in condition of 500℃, 1h roasting, NH4Cl/ore=0.5 and additive/ore=0.25. 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.
出处
《有色金属》
CSCD
2000年第1期66-68,共3页
Nonferrous Metals
基金
国家自然科学基金!59804004
59674021
国家杰出青年基金!59725408
