Method for recovering rare earth element
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United States of America Patent
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Apr 26, 2016
Grant Date -
Jul 3, 2014
app pub date -
Jul 27, 2012
filing date -
Jul 29, 2011
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Abstract
An object of the present invention is to provide a method for recovering a rare earth element from a workpiece containing at least a rare earth element and an iron group element, which can be put into practical use as a low-cost, simple recycling system. The method of the present invention as a means for resolution is characterized by including at least a step of separating a rare earth element in the form of an oxide from an iron group element by subjecting a workpiece to an oxidation treatment, then turning the treatment environment into an environment where carbon is present, and subjecting the oxidation-treated workpiece to a heat treatment at a temperature of 1150° C. or more.
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