Nd-Fe-B永久磁铁的短环回收:对RE2Fe14B矩阵相恢复的可持续解决方案
Amit Mishra1, Sina Khoshsima1, Tomaž Tomše1
1Department of Nanostructured Materials, Jožef Stefan Institute, Jamova Cesta 39, 1000 Ljubljana, Slovenia.
Materials (Basel, Switzerland)
|October 14, 2023
概括
回收稀土永久磁铁对于绿色能源技术至关重要. 这项研究开发了一种环保的酸浸出方法,从磁体废物中提取有价值的磁相,从而实现可持续的稀土元素回收.
科学领域:
- 材料科学与工程 材料科学与工程
- 可持续化学 可持续化学
- 金回收 金回收 金回收
背景情况:
- 绿色转型和可再生能源 (风力轮机,电动汽车) 依赖于稀土 (RE) 永久磁铁.
- 可持续发展需要有效回收基于RE的永久磁铁,以供应关键的RE元素.
- 短循环回收提供了一个经济上有吸引力的替代方案,以传统的方法再加工铁磁铁废弃物.
研究的目的:
- 开发一种从烧结的Nd-Fe-B磁铁中提取 (Nd, Pr) 2Fe14B硬磁相的方法.
- 为了研究使用酸的二次,富含RE的相的优先化学浸出.
- 评估浸出时间对相位组成和磁性特性的影响.
主要方法:
- 通过衰减 (HD) 来粉碎烧结的Nd-Fe-B磁铁,以提高表面积.
- 使用1M酸,对富含RE的相进行首选化学浸出.
- 微结构 (SEM),组成 (ICP-MS) 分析,以及热脱气概况研究.
主要成果:
- 富含RE的阶段最好在5-15分钟的反应时间内使用1M酸浸出.
- 漂水是由 (Nd) 和 (Pr) 的负电化学潜力控制的.
- 拟议的酸方法与现有的磁性废料 (HPMS) 的处理技术兼容.
结论:
- 酸有效地从Nd-Fe-B磁体废物中提取有价值的 (Nd, Pr) 2Fe14B磁相.
- 环保的洗过程使用温和的有机酸,在反应后很容易中和.
- 这种方法支持可持续的稀土元素回收,这对于绿色能源应用至关重要.
关键词:
这就是为什么我会这样做.Nd-Fe-B 磁铁的使用情况它们是Pr) 2Fe14B颗粒.谷物边界阶段 谷物边界阶段的衰减 的衰减泄漏 (leaching) 泄漏 (leaching) 是指一个过程.稀土元素 稀土元素 稀土元素回收回收是回收的方法.更多相关视频
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