Effect of Calcium Addition on the High-Temperature Recovery of Nd and Dy from Nd-Fe-B Scrap Using Mg-Based Extractants
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This study investigated whether calcium (Ca) addition improved the recovery of neodymium (Nd) and dysprosium (Dy) from Nd-Fe-B magnet scrap using magnesium (Mg)-based liquid metal extraction (LME). Traditional LME processes are limited to temperatures up to 850 °C due to oxidation issues, reducing the efficiency of rare earth element (REE) recovery, especially for Dy. By adding 10 wt.% Ca to Mg and increasing the processing temperature to 1,000 °C, we achieved nearly 100% Nd and approximately 38% Dy recovery, compared to 91% and 28%, respectively, with pure Mg at 850 °C. However, excessive Ca addition (20 wt.%) decreased the recovery efficiency due to the formation of stable intermetallic compounds. These results highlight the critical role of Ca in optimizing REE recycling from Nd-Fe-B magnet scrap.
Abstract
This study investigated whether calcium (Ca) addition improved the recovery of neodymium (Nd) and dysprosium (Dy) from Nd-Fe-B magnet scrap using magnesium (Mg)-based liquid metal extraction (LME). Traditional LME processes are limited to temperatures up to 850 °C due to oxidation issues, reducing the efficiency of rare earth element (REE) recovery, especially for Dy. By adding 10 wt.% Ca to Mg and increasing the processing temperature to 1,000 °C, we achieved nearly 100% Nd and approximately 38% Dy recovery, compared to 91% and 28%, respectively, with pure Mg at 850 °C. However, excessive Ca addition (20 wt.%) decreased the recovery efficiency due to the formation of stable intermetallic compounds. These results highlight the critical role of Ca in optimizing REE recycling from Nd-Fe-B magnet scrap.
참고문헌 (27)
- Z. Hua, , ACS Sustainable Chem. Eng, 2, pp.2536~ (2014)
- M. Sagawa, , J. Appl. Phys, 55, pp.2083~ (1984)
- K. Binnemans, , J. Cleaner Prod, 51, pp.1~ (2014)
- J. J. Croat, , J. Appl. Phys, 55, pp.2078~ (1984)
- H. -S. Yoon, , Korean J. Chem. Eng, 31, pp.706~ (2014)
- D. Dupont, , Green Chem, 17, pp.2150~ (2015)
- O. Takeda, , J. Alloys Compd, 392, pp.206~ (2005)
- J. W. Lyman, , High Temp Mater Process, 11, pp.175~ (1993)
- X. Sun, , ACS Sustainable Chem. Eng, 2, pp.1910~ (2014)
- M. -S. Lee, , Sep. Purif. Technol, 46, pp.72~ (2005)
- T. Itakura, , J. Alloys Compd., 408-412, pp.1382~ (2006)
- M. Itoh, , Chem. Lett, 37, pp.372~ (2008)
- T. Uda, , Mater. Trans, 43, pp.55~ (2002)
- K. Murase, , J. Alloys Compd, 217, pp.218~ (1995)
- Y. Mochizuki, , ACS Sustainable Chem. Eng, 1, pp.655~ (2013)
- T. W. Ellis, "Ames, Iowa, US Patent, 5,437,709", ~ (1995)
- Y. Xu, , J. Mater. Res, 15, pp.2296~ (2000)
- T. H. Okabe, , Mater. Trans, 44, pp.798~ (2003)
- O. Takeda, , J. Alloys Compd., 408-412, pp.387~ (2006)
- H. J. Chae, , J. Alloys Compd, 586, pp.S143~ (2014)
- H. W. Na, , Curr. Nanosci, 10, pp.128~ (2014)
- M. Sun, , J. Mater. Process. Technol, 218, pp.57~ (2015)
- S. -W. Nam, , Metals and Materials International, 27, pp.538~ (2020)
- S. -W. Nam, , Metals, 11, pp.1345~ (2021)
- R. Schmid-Fetzer, "Magnesium Technology", pp.67~ (2016), Springer
- S. -H. Ha, , Mater. Trans, 49, pp.1081~ (2008)
- M. Firdaus, , J. Sustain. Metall, 2, pp.276~ (2016)