Recycling of NdFeB magnets employing oxidation, selective leaching, and iron precipitation in an autoclave
Elif Emil-Kaya, Buse Polat, Sreċko Stopić, Sebahattin Gürmen, Bernd Friedrich
Abstract
for REEs. As the last step, the iron dissolved during leaching was precipitated as hematite in the autoclave. The hematite precipitation experiments were performed based on the Box-Behnken design. The effect of precipitation parameters was investigated by ANOVA analysis, and the precipitation process was optimized using response surface methodology (RSM), which resulted in the minimum iron and maximum REEs content in the leach liquor.
Topics & Concepts
Neodymium magnetLeaching (pedology)DissolutionMaterials scienceMetallurgyPrecipitationHematiteNitric acidNuclear chemistryChemistryChemical engineeringMagnetGeologySoil waterPhysical chemistryMeteorologyPhysicsSoil scienceEngineeringQuantum mechanicsExtraction and Separation ProcessesGeochemistry and Elemental AnalysisRecycling and Waste Management Techniques