|About this Abstract
||Part C-3: Processing of Critical Metals
||Selective Extraction and Recovery of Rare Earth Metals (REMs) from NdFeB Magnet Grinding Sludge
||Waraporn Piyawit, Pisit Sawananusorn, Loeslakkhana Srikhang, Panya Buahombura, Narong Akkarapattanagoon, Tapany Patcharawit, Sakhob Kumkoa
|On-Site Speaker (Planned)
Grinding sludge from the sintered neodymium-iron-boron (NdFeB) magnets production process were enriched with critical rare earth elements (neodymium, dysprosium and praseodymium), which can be up to 30% in the magnets. The demand of NdFeB magnets are simultaneously growing. Therefore, rare earths recovered from waste residuals would reduce a demand in primary rare earth element sources. In this study, the feasibility of recycling rare earths through a hydrometallurgical process was investigated. The selective leaching process of Nd from grinding sludge can successfully raise the rare earths concentration to 70%. The necessity of an oxidation pretreatment to improve the selectivity between Nd and Fe will be described.
||Planned: At-meeting proceedings