1. Doctoral Student, School of Materials Science and Engineering, Inner Mongolia Univ. of Technology, Hohhot 010051, China.
2. Professor, School of Resources and Environmental Engineering, Inner Mongolia Univ. of Technology, Hohhot 010051, China.
3. Lecturer, School of Resources and Environmental Engineering, Inner Mongolia Univ. of Technology, Hohhot 010051, China (corresponding author).
4. M.Sc. Student, School of Resources and Environmental Engineering, Inner Mongolia Univ. of Technology, Hohhot 010051, China.