1. Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, GuangRong Dao 8, Hongqiao District, Tianjin 300130, P. R. China
2. College of Chemical Engineering, Xinjiang University, Urumqi, Xinjiang, 830046, P. R. China
3. Tianjin Baogang Research Institute of Rare Earths Co., Ltd., Tianjin 300300, P. R. China