对Nd2Fe14B的环保方法 通过选择性化学漂水提取磁相:一项概念验证研究
Sina Khoshsima1, Janja Vidmar2,3, Zoran Samardžija1
1Department for Nanostructured Materials, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
Materials (Basel, Switzerland)
|July 29, 2023
概括
稀土磁铁的有效回收对于可持续性至关重要. 酸选择性地从Nd-Fe-B粉末中出富含的相,产生高质量的磁性材料供重复使用.
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.
- 可持续制造 可持续制造 可持续制造
背景情况:
- 绿色转型需要可持续采购诸如新 (Nd) 等关键材料.
- 有效回收Nd-Fe-B磁铁对于实现可持续性和减少对外依赖至关重要.
- Nd-Fe-B磁铁是许多绿色技术中必不可少的组成部分.
研究的目的:
- 探索从Nd-Fe-B粉末中选择性化学浸出富含的阶段.
- 调查提取Nd2Fe14B矩阵相重复使用的可能性.
- 为了评估温和的有机酸作为环保的洗剂.
主要方法:
- 使用带造,化,喷射磨粉 Nd-Fe-B 粉末作为一个案例研究.
- 使用稀释的酸和酸 (0.01,0.1,1M) 进行选择性化学浸出,持续15分钟.
- 进行了微观结构调查 (SEM),磁性表征和元素组成分析 (ICP-MS).
主要成果:
- 1M酸对富含的阶段具有很高的选择性,实现时刻/质量值为160emu/g.
- 酸暴露导致Nd2Fe14B矩阵的结构损伤,并减少了时刻/质量值 (96.2emu/g).
- 处理过程中存在的气并没有显著影响漏动态.
结论:
- 温和的有机酸,特别是1M酸,是有效的和选择性的液 Nd-Fe-B 磁铁.
- 拟议的环保工艺可以扩展到再加工工业废料和退役磁铁.
- 获得单相Nd-Fe-B粉末有助于在新型磁铁生产中使用它们,从而支持循环经济.
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