At present, the research on the recycling of bonded Nd–Fe–B
magnet wastes is primarily conducted at the laboratory level. This
study presents the kilogram-scale recycling of waste bonded Nd–Fe–B
magnets using a NaOH–ethylene glycol solution. The impact of
reaction temperature and catalyst concentration on the recycling process
at this scale was investigated, and regenerated bonded Nd–Fe–B
magnets were prepared from recycled magnetic powders. The magnetic
properties of the recycled powders and regenerated magnets closely
resembled those of the original products. Additionally, a life cycle
assessment was conducted to analyze the production and recycling process
of bonded Nd–Fe–B magnetic powders, revealing lower
environmental impacts for the recycling process compared to production.
Therefore, successful scale-up recycling through a NaOH–ethylene
glycol solution demonstrates potential commercial and environmental
opportunities for bonded Nd–Fe–B magnet waste.