一种钕铁硼块体废料的回收再利用方法

• Format: Patent
• Language: Chinese
• Published: 07.06.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

本发明公开了一种钕铁硼块体废料的回收再利用方法，可以有效提高再生磁体的剩磁，本发明通过利用钕铁硼主相吸氢破碎的特性，针对固体废料进行氢破碎回收处理同时结合旋转热扩散技术，在氢爆环节完成晶界扩散处理，然后再通过与高剩磁配方磁粉比例掺杂等手段，能够保证在足够矫顽力的同时极大改善回收磁体的剩磁指标。相较于传统工艺对成品磁体进行晶界扩散来完成矫顽力的提高,本发明将氢处理与扩散相结合，在完成磁体破碎的基础上同时进行晶界扩散，且由于破碎后的磁体颗粒较小，也极大提高了扩散的效果，大大缩短生产周期，降低生产成本，提高生产效率。同时，该方法还具有高效回收、资源循环、环保无污染等优点。 The invention discloses a method for recycling neodymium-iron-boron block waste. The method can effectively improve the residual magnetism of a regenerated magnet, and completes grain boundary diffusion treatment in a hydrogen explosion link by utilizing the hydrogen absorption crushing characteristic of a neodymium-iron-boron main phase, carrying out hydrogen crushing recovery treatment on solidwaste and combining a rotary thermal diffusion technology at the same time, and then by means of doping with high-remanence formula magnetic powder in proportion and the like, the remanence index of the recycled magnet can be greatly improved while enough coercive force is ensured. Compared with a traditional process that grain boundary