APPARATUS FOR MANUFACTURING ALLOY POWDER FOR PERMANENT MAGNET AND METHOD THEREFOR

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PROBLEM TO BE SOLVED : To provide an apparatus for manufacturing an alloy powder for a permanent magnet, which sufficiently dehydrogenates and pulverizes an alloy slug, and to provide a manufacturing method therefor. SOLUTION : The method for manufacturing the alloy powder for the permanent magnet comprises the step of : making the alloy slug of a raw material containing a rare earth element, a metallic element and boron occlude hydrogen; and pulverizing it into the alloy powder. The apparatus is provided with a rotatable heat-treating part 12 for dehydrogenating the alloy powder M having occluded hydrogen by heating. The heat-treating part has projections 20 on its inner surface. The apparatus dehydrogenates the alloy powder having occluded hydrogen by heating while rotating the heat-treating part having the projections on the inner surface. The projections act so as to frequently move the alloy powders existing therein and make them contact or collide with each other, and realize collisions with a sufficient frequency.