1. School of Metallurgy and Environment, Central South University, No. 932, Lushan South Road, Yuelu District, Changsha 410083, China
2. Laboratory of Metallurgical Separation Science and Engineering, Central South University, No. 932, Lushan South Road, Yuelu District, Changsha 410083, China
3. National Engineering Laboratory for Efficient Utilization of Refractory Non-ferrous Metals Resources, Central South University, No. 11, Jianshe Sinchon, Yuelu District, Changsha 410083, China