METHOD OF SEPARATING AND RECOVERING MAGNETIC POWDER

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PROBLEM TO BE SOLVED : To provide a method which can separate and recover efficiently a magnetic powder from a composition for a resin bond type magnet containing the magnetic powder which contains a rare earth element, a transition metallic element and a thermosetting resin having a radical polymerization reactivity or a resin bond type magnet obtained by using this without causing the deterioration of a composition for magnetic characteristics. SOLUTION : The method separates and recovers the magnetic powder from the composition for the resin bond type magnet containing the magnetic powder which contains the rare earth element and the transition metallic element in a configuration element and a thermosetting resin having radical polymerization reactivity or the resin bond type magnet obtained by using it. First, after the composition for the resin bond type magnet or the resin bond type magnet is selected as an object to be processed, the object to be processed is cooled beforehand at 0°C or lower, and subsequently pulverized while a low temperature is maintained. Then, the magnetic powder is separated and recovered from which the resin components are substantially removed from the obtained pulverized object. COPYRIGHT : (C)2006, JPO&NCIPI