Preparation of anisotropic (Ce, Nd, Pr)-Fe-B powder with HDDR method from wasted sintered magnets

Zhao, Haili; Yin, Wen; Ding, Guangfei; Ju, Jinyun; Tang, Xu; Chen, Renjie; Yuan, Jun; Yan, Aru

doi:10.1016/j.jmmm.2022.169745

Cited by 5 publications

(1 citation statement)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been revealed that by enhancing the operating temperature, an increase in the equilibrium pressure for disproportionation and the reaction time has been determined [40]. Excluding direct reuse, processes like gas-phase extraction, hydrogen decrepitation, hydrometallurgical, pyrometallurgical methods, have also been implemented [41]. The effect on environment in the manufacture of new NdFeB magnets using recycled NdFeB magnets from discarded HDDs by hydrogen decrepitation method was compared by Sprecher et al [42].…”

Section: Permanent Magnetsmentioning

confidence: 99%

An Overview on Resource and Recovery Prospectives of the Critical Element Neodymium

Pradhan

Mishra

2023

ChemBioEng Reviews

View full text Add to dashboard Cite

Neodymium is critically scarce and is often used in supportable technologies such as permanent magnets, batteries, and catalysts. The extraction of it from virgin ores causes environmental degradation and recycling of end‐of‐life (EOL) products proves to be an alternative to meet its future criticality. From an environmental and economic point of view, magnets produced from recovered neodymium perform better than the ones produced from virgin neodymium. In this review various technologies such as hydro metallurgy, pyro metallurgy, supercritical CO2 extraction, desalination, and adsorption have been discussed for the recovery of this metal from different EOL sources. The advantages and limitations of these methods are summarized. Different experimental status like sources, temperature, aqueous phase composition, organic phase make up, and maximum recovery efficiency are also looked upon. This review may prove beneficial for the researchers to design recovery road maps under different circumstances.

show abstract

Section: Permanent Magnetsmentioning

confidence: 99%