1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education) Northeastern University No. 3-11, Wenhua Road, Heping District Shenyang Liaoning 110819 P. R. China
2. School of Metallurgy Northeastern University No. 3-11, Wenhua Road, Heping District Shenyang Liaoning 110819 P. R. China