Since 1980, CINF has been involved in the engineering design of RE separation plants. CINF is mainly involved in the consultation and engineering design of smelting and processing projects for W, Mo, Ta, Nb, RE, V and cemented carbides as the China sole toplevel integrated design institute for the engineering design of Re oxides complete separation and metal (alloy) smelters. CINF has mastered the advanced technologies such as P507 extraction complete separation, fuzzy extraction, ammoniafree saponification, ammoniafree sedimentation, waste water advanced treatment and large size electrolytic cell process.