| 简介 |
PROBLEM TO BE SOLVED : To provide a method for separating and recovering a rare earth element as an oxide from iron group elements by moving a treatment environment into the presence of carbon and carrying out heat treatment after carrying out an oxidation process on a processing target that includes at least the rare earth element and an iron group element, wherein the method is low-cost and whereby an oxide of a rare earth element can be efficiently separated from iron group elements and processing containers can be used repeatedly over a long period of time while suppressing consumption and loss of the processing containers.
SOLUTION : A method is characterized by mixing the processing target that has undergone oxidation processing with petroleum coke as a source for supplying carbon and accommodating the mixture in a processing container, and by carrying out heat treatment at a temperature of 950-1, 150°C (not including 1, 150°C) in an inert gas atmosphere or in a vacuum.
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