NdFeB Magnets Recycling Process: An Alternative Method to Produce Mixed Rare Earth Oxide from Scrap NdFeB Magnets

Neodymium iron boron magnets (NdFeB) play a critical role in various technological applications due to their outstanding magnetic properties, such as high maximum energy product, remanence and coercivity. Production of NdFeB is expected rise significantly the coming years, for this reason, demand rare earth elements (REE) will not only remain but it also increase even more. The recovery has become essential satisfy recent years. In present study from new promising process flowsheet proposed follows; (1) acid baking performed decompose magnet extraction efficiency Nd, Pr, Dy. (2) Iron was removed leach liquor during hydrolysis. (3) production REE-oxide using ultrasonic spray pyrolysis method. Recovery mixed via method between 700 °C 1000 innovative step comparison traditional combination precipitation with sodium carbonate thermal decomposition at 850 °C. synthesized REE- oxide powders were characterized by X-ray diffraction analysis (XRD). Morphological properties phase content revealed scanning electron microscopy (SEM) Energy-dispersive (EDX) analysis. To obtain size particle distribution REE-oxide, search algorithm based on an image-processing technique executed MATLAB. obtained particles are spherical sizes 362 540 nm. experimental values compared theoretically predicted ones.