1. School of Engineering and Technology, China University of Geosciences (Beijing), Beijing, P. R. China
2. Ningxia Vocational Technical College of Industry and Commerce, Ningxia, P. R. China
3. China Europe Advanced Materials Innovation Institute, China University of Geosciences (Beijing), Zhengzhou, P. R. China
4. Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Zhengzhou, P. R. China