| 简介 |
PROBLEM TO BE SOLVED : To provide a method for separating and recovering an objective substance (for example, a rare earth element etc.) from a product etc. (for example, a rare earth magnet etc.) including the objective substance with low energy and at a low cost, and to provide a separation and recovery system for performing the method.
SOLUTION : The method for separating and recovering an objective substance from a solid-state material RM containing at least one objective substance and another substance is provided, which includes : a heating step of heating the solid-state material into a material in a solid-liquid coexisting state by heating one surface side of the solid-state material using a heating means 22 under a low-oxygen atmosphere; and a recovery step of recovering the objective substance precipitated on the one surface side of the solidified material obtained when the material in a solid-liquid coexisting state is solidified after the heating step. The precipitated oxide is halogenated in a halogenation treatment part 3, further dehalogenated in a dehalogenation treatment part 6, and recovered. The heating step includes a collection step of collecting the objective substance evaporated from the solid-state material RM in a solid state using a collection plate 23.
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