Hydrofluoric Acid Separating -EDTA Capacity Measuring of Total RareEarth Content in Neodymium-iron-boron Waste Material

The method of removing the water or oil from the Neodymium-iron-boron waste material by drying and burning was tested in this thesis.The analyzing sample was well mixed after we turned the substrate metal transforms as the oxide compound of brittle.The method of content testing of rare earth by hydrofluoric acid separating and EDTA capacity measuring was researched.The accuracy of the analyzing result was increased by removing the impurities ion twice.The RSD value was 1.41% and the testing result was repeated well.