Leaching of NdFeB scrap permanent magnet in Nitric Acid

The rare-earth elements (REEs) are becoming increasingly important in the transition to a green economy, due to their essential role in permanent magnets, lamp phosphors, catalysts, rechargeable batteries etc. In this study leaching condition of NdFeB magnet in acid nitric was investigated. First, Demagnetization of NdFeB scrap permanent magnet was carried out and then, the effect of acid concentration, leaching time, temperature and solid to liquid ratio on leaching efficiency were studied and the best condition of leaching process was preferred. In order to characterize identify the phase constituent of the alloy, XRD analysis was performed and then, to investigate the chemical analysis of the elements in the magnet powder scrap, The ICP-OES analyzer was used. It was shown that in the best condition, 95% of neodymium from NdFeB magnet could be recovered in acid concentration of 2 mol/liter, leaching time of 15 minutes S/L of 0.02 at 25oC.

Leaching of NdFeB scrap permanent magnet in Nitric Acid Keywords:

Rare earth elements , Neodymium , Neodymium permanent magnet , Recovery

Leaching of NdFeB scrap permanent magnet in Nitric Acid authors

Mohammad Hamedi

BSc student of materials engineering School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran

Iman Ramezi

MSc student of materials engineering – extractive metallurgy School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran

Shahram Raygan

Associate professor of Materials science and engineering – synthesis and extraction of materials School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran

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Link to this Paper:

https://civilica.com/doc/699896

Document National Code:

IMES11_389

Index date: 26 February 2018

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Hamedi, Mohammad and Ramezi, Iman and Raygan, Shahram,1396,Leaching of NdFeB scrap permanent magnet in Nitric Acid,The 6th International Conference on Exhibitiion on Metallurgy and Materials Engineering,Tehran,https://civilica.com/doc/699896

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Ranking of University of Tehran

Type of center: دانشگاه دولتی

Paper count: 116,262

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