RECOVERY OF NEODYMIUM FROM NDFEB OXIDATION-ROASTED SCRAP BY ACETIC ACID LEACHING

摘要

The present invention is to provide a process for selectively separating a neodymium NdFeB permanent magnet from waste scrap . ; the invention NdFeB permanent magnets and high-temperature oxidation of the powder by roasting the waste scrap , by performing a weak acid leaching using nitric acid to selectively leach the neodymium , and a neodymium acetate recovered by fractional crystallization from acetic acid leach solution , and will rest neodymium remaining in the filtrate is concentrated to provide a selective isolation method for recovering the total amount of neodymium is reacted with oxalic acid .