1. Most ball-grinding powders, which are get from hydrogen decrepitation powder-fabricating technique are polycrystalline, which we assume will affect tropism so as to get low magnetic properties.

2. The homogeneous temperature, decrepitation temperature, major element compositions and volatile components of the inclusions were determined.

3. Compared with the grains of complete hydrogen decrepitation, the grains of selective hydrogen decrepitation are relatively larger and more uniform, but small grains are fewer.

4. Hydrogen Decrepitation (HD) process has been widely used to crash NdFeB ingots in sintered NdFeB magnet industry.

5. The results indicate that, the pellets made from pure Daxigou ore fines are not suitable because of low yield and low decrepitation temperature.