For an extended period, rare earth elements, often referred to as the "industrial vitamins," have been controlled by a few major nations in terms of export quantities. Consequently, many countries consider them strategic resources due to their perceived scarcity. In response to the increasingly tense global situation, more countries are investing in the development of technologies for the recycling and purification of rare earth elements. In our research, we chose neodymium iron boron (NdFeB) magnets as the target for rare earth element recycling, owing to the soaring demand for NdFeB magnets, a primary material for permanent magnet synchronous motors, driven by the widespread adoption of electric vehicles. As the demand rises, the number of end-of-life discarded magnets is expected to increase.