1. School of Mining and Coal Engineering, Inner Mongolia University of Science and Technology, Baotou, China
2. Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou, China
3. Department of Mining Engineering, Mehran University of Engineering & Technology, Jamshoro, Pakistan
4. Inner Mongolia Key Laboratory of Mining Engineering,Inner Mongolia University of Science and Technology, Baotou, China