Dynamic Substance Flow Analysis of Neodymium and Dysprosium Associated with Neodymium Magnets in Japan

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.

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