1. Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
2. Western Australian School of Mines: Minerals, Energy, and Chemical Engineering, Curtin University, Kalgoorlie, WA 6430, Australia
3. Department of Mining Engineering, Shanxi Institute of Technology, Yangquan 045000, China