METHOD FOR RECOVERING RARE EARTH ELEMENT

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 mean...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HOSHI Hiroyuki, KIKUGAWA Atsushi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY DISPOSAL OF SOLID WASTE FERROUS OR NON-FERROUS ALLOYS METALLURGY PERFORMING OPERATIONS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS RECLAMATION OF CONTAMINED SOIL SOIL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	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.