Rückgewinnung Seltener Erden aus FeNdB-Dauermagneten mittels Feststoffchlorierung

Rückgewinnung Seltener Erden aus FeNdB-Dauermagneten mittels Feststoffchlorierung
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采用固体氯化法从 FeNdB 永磁体中回收稀土

DOI:
10.1002/cite.201600171
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发表时间:
2017
影响因子:
1.9
通讯作者:
M. Bertau
M. Bertau
中科院分区:
工程技术4区
文献类型:
--
作者:
T. Lorenz;P. Fröhlich;M. Bertau

文献摘要

被引文献

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以NH4Cl为氯化剂的固相氯化是从废弃磁体中回收稀土的一条新途径。与湿法冶金回收方法相比,这一工艺具有许多经济优势。作为第一步,用一家风力发电厂废弃的FeNdB磁铁调整固态氯化。根据33-Box-Behnken设计,在不同温度、时间和NH4Cl/磁铁比的条件下,对氯化步骤的SE产率进行了优化。同样,该工艺得益于氯化步骤后用醋酸钠/醋酸缓冲液进行浸出。
Solid state chlorination with NH4Cl as chlorinating agent represents a new way for rare earth recovery from end‐of‐life‐magnets. Compared to hydrometallurgical recycling approaches this process provides a number of economic advantages. As a first step, solid state chlorination was adjusted with disused FeNdB magnets from a wind power plant. The SE yield of the chlorination step was optimized according to a 33‐Box‐Behnken design with varying temperature, time, and NH4Cl/magnet ratio. Likewise, the process profits from leaching with a sodium acetate/acetic acid buffer following the chlorination step.