Funding for this research was provided by:
fund of Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, Henan Polytechnic University (KCF201803)
National Natural Science Foundation of China (51622404, 11572343)
Doctoral fund of Henan Polytechnic University (B2019-21)
Article History
Received: 17 December 2018
Accepted: 12 June 2019
First Online: 29 June 2019