If we classify refractory ferrosilicon nitride according to physical properties, then it can be divided into ordinary refractory ferrosilicon nitride and stabilized refractory ferrosilicon nitride. At the same time, ferrosilicon nitride for steel production can also be divided into ordinary ferrosilicon nitride for steel production and high-purity ferrosilicon nitride for steel production according to its characteristics. Ordinary ferrosilicon nitride has a gray-white color, while stable ferrosilicon nitride is tea brown. The surface of ferrosilicon nitride for refractory materials is clean and has no obvious foreign impurities.

The particle size of ordinary refractory ferrosilicon nitride is 200 mesh, and the particle size of stable refractory ferrosilicon nitride is 325 mesh. The surface of ferrosilicon nitride for steel production must also be clean and free of obvious foreign impurities.