| Abstract Scope |
This project introduces a transformative approach to extract rare earth elements, REEs – neodymium, scandium, and yttrium – from bauxite residue, a red mud byproduct of aluminum production and a secondary source of REEs. Bauxite residue contains substantial concentrations of critical materials, making it valuable for alternative recovery. The process includes the methane reduction of hematite (Fe2O3) to magnetite (Fe3O4) and magnetic separation of the iron from the rest of the bauxite residue. Since the hematite is approximately half the weight percent of the residue, this is a beneficial step prior to the leaching of rare earth oxides which can be converted to rare earth metals. By targeting multiple critical materials from a single waste stream, this approach reduces reliance on primary sources for important REEs, strengthens alternative supply chains, and promotes circular resource management. This system exemplifies sustainable material recovery, advancing sustainability and economic development through innovative reclamation technologies. |