使用过的Nd-Fe-B永久磁铁的直接再利用
Zara Cherkezova-Zheleva1, Daniela Paneva1, Sabina Andreea Fironda2
1Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bldg. 11, 1113 Sofia, Bulgaria.
Materials (Basel, Switzerland)
|July 12, 2025
概括
本研究引入了使用机械化学的废旧 (EoL) 铁 (Nd-Fe-B) 磁铁的资源高效回收方法. 该过程成功地提取了磁粒,同时保持了Nd2Fe14B相和精炼粒子特性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 可持续技术 可持续技术
背景情况:
- -铁- (Nd-Fe-B) 磁铁对于可再生能源,电子移动和国防工业至关重要.
- 对稀土元素 (REE) 的需求增加突显了供应链的脆弱性和需要可持续的回收解决方案.
- 目前的回收方法经常面临效率和环境影响方面的挑战.
研究的目的:
- 开发一个资源效率高的回收协议,用于使用终止的 (EoL) Nd-Fe-B磁铁.
- 研究机械化学的应用,以处理废弃的 Nd-Fe-B 磁铁.
- 通过标准化批量制备和基于属性的处理,减少回收循环的跨度.
主要方法:
- 从摩托车中收集,分类和预处理废物烧结的Nd-Fe-B磁铁.
- 机械化学方法的应用,包括在子反应堆中120分钟的高能球磨.
- 处理非氧化烧结的EoL磁铁,以提取Nd2Fe14B磁粒并改进微观结构.
主要成果:
- 成功地从EoL磁铁中提取Nd2Fe14B磁粒.
- 在机械化学处理后保持初级的Nd2Fe14B磁相.
- 实现了异型粒子形状和 Nd/REE 丰富层在谷物表面的形成.
结论:
- 机械化学加工为回收Nd-Fe-B磁铁提供了可持续和高效的回收途径.
- 开发的协议简化了技术,减少了能源消耗,降低了生态影响.
- 这种方法有助于关键稀土元素的闭环价值链.
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