Separation of Cobalt, Samarium, Iron, and Copper in the Leaching Solution of Scrap Magnets

With the growing awareness of protecting urban environment and increasing demand for strategic materials, recycling SmCo magnets has become imperative. This paper provides a series methods regarding available hydrometallurgical technologies scrap magnets. study aimed to recover samarium (Sm), cobalt (Co), copper (Cu), iron (Fe) from acid leachate by using precipitation ion exchange. IRC748 showed good adsorption capacity Fe Cu. Elution tests were conducted sulfuric at concentration 2N as eluents. Precipitation was performed first selective chemical method, Sm precipitated sodium sulfate powder. Then, samarium-deprived solution placed in beaker, addition oxalic promoted oxalate precipitation. Furthermore, leachate, which is rich Cu Fe, mixed with obtain successfully recovered through exchange precipitants.