^1.School of Mining and Coal, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China

^2.State Key Laboratory of Research and Comprehensive Utilization of Baiyun Obo Rare Earth Resources, Baotou Research Institute of Rare Earths, Baotou 014030, Inner Mongolia, China

^3.School of Economics and Management, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China

^4.Research Center of Information Industry and Industrial Innovation of Key Research Institute of Humanities and Social Sciences for Universities in Inner Mongolia Autonomous Region, Baotou 014010, Inner Mongolia, China

^5.Key Laboratory of Green Extraction & Efficient Utilization of Light Rare Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou 014010, Inner Mongolia, China

^6.Research Institute of Yellow River Jiziwan Development, Baotou 014010, Inner Mongolia, China

^6.School of Rare Earth Industry (School of Rare Earth Engineering and Technology), Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China