degassing rotor is mainly used for aluminum casting. The rotor is capable of uniformly agitating the molten aluminum and dispersing the gas.

Compared with graphite shafts and rotors, silicon nitride degassing shafts and rotors have excellent properties, including easy-to-replace and repairable separation shafts and impellers, good molten aluminum washability, high oxidation resistance, high speed and high efficiency. Dispersing and removing hydrogen and other unwanted particles for long life can help aluminum plants save a lot of money.

Chemical data:

Types	Gas Si3N4
Density	>3.2g/cm3
Si3N4 content	>92%
Flexural strength	>700Mpa
Compressive strength	>1500Mpa
Thermal conductivity(W/mk)	16-22
Porosity	0
Thermal expansion coeff.(RT-1000℃)	3.2
Max temperature In air	1400℃
Hardness(HRA)	>92