DYNAMIC SUBSTANCE FLOW ANALYSIS OF NEODYMIUM AND DYSPROSIUM ASSOCIATED WITH NEODYMIUM MAGNETS IN JAPAN
Last modified: 2014-09-11
Abstract
The recycling of neodymium (Nd) and dysprosium (Dy) is of great interest
to industry because of the rapid increase in demand for Nd magnets and the
limited availability of the resource. This study characterized the flows and
stocks of Nd and Dy associated with Nd magnets in Japan and then
evaluated the economic feasibility of recycling Nd magnets. Dynamic
substance flow analysis of Nd and Dy in Japan was conducted using data
from 1984 to 2010. A bottom-up approach was employed in the analysis to
prepare time series of consumption by end use. The results of this study will
contribute to the establishment of better recycling systems of Nd and Dy.
to industry because of the rapid increase in demand for Nd magnets and the
limited availability of the resource. This study characterized the flows and
stocks of Nd and Dy associated with Nd magnets in Japan and then
evaluated the economic feasibility of recycling Nd magnets. Dynamic
substance flow analysis of Nd and Dy in Japan was conducted using data
from 1984 to 2010. A bottom-up approach was employed in the analysis to
prepare time series of consumption by end use. The results of this study will
contribute to the establishment of better recycling systems of Nd and Dy.
Keywords
substance flow analysis; neodymium magnet; in-use stock; recycle potential; resource management
References
Sagawa, M., Fujimura, S., Togawa, N., Yamamoto, H., Matsuura, Y. (1984). New material for permanent magnets on a base of Nd and Fe. Journal of Applied Physics, 55, 2083–2087.
Xiaoyue Du, T. E. Graedel (2011). Global In-Use Stocks of the Rare Earth Elements: A First Estimate. Environmental Science & Technology, 45, 4096-4101.
Wei Shi, Ichiro Daigo, Yasunari Matsuno, Yoshihiro Adachi (2010). Substance Flow Analysis of Dysprosium in Japan. J. Japan Inst. Metals, 74, 11, 758-765.
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