| 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 in a solid state from a solid-state material RM containing at least one objective substance and another substance is provided, which includes : a reduced-pressure heating step of selectively evaporating the objective substance in the solid-state material by heating one surface of the solid-state material with a heating means 22 under a reduced-pressure atmosphere using a reduced-pressure heating furnace 2; and a collection step of collecting the objective substance evaporated in the reduced-pressure heating step in a solid state using a collection plate 23. In the reduced-pressure heating step, heating is performed while controlling the temperature of the heated surface of the solid-state material to be a temperature at which vapor pressure of the objective substance is higher than that of the other substance, so that the other substance does not substantially evaporate while the objective substance evaporates. The collected material is recovered after subjected to a halogenation treatment part 3 and a dehalogenation treatment part 6.
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