Patent ID: 6960240

Claim:
A method of remelting R—Fe—B base rare earth magnet scrap and/or sludge wherein R is a rare earth element inclusive of yttrium for reuse as melting feed, said method comprising the steps of: charging a melting furnace crucible with a rare earth-free magnet-constituent metal feed, heating the metal teed for melting into a melt, adding to the melt a rare earth-containing metal feed and 0.1 to 50% by weight based on the metal feeds of the R—Fe—B base rare earth magnet scrap and/or sludge, further adding 0.01 to 30% by weight based on the metal feeds of a particulate flux containing a halide of at least one metal selected from among alkali metals, alkaline earth metals and rare earth metals and having an average particle size of 1 to 50 μm, and melting the resulting mixture.