In order to remove hydrogen from molten aluminum, a silicon nitride pipe is used to feed nitrogen or argon, while silicon nitride rotor is used to stir up and disperse the gas bubble, and then take the Nitrogen out with the bubble throughout the molten bath, thus get the result of hydrogen remove.

l The high-temperature mechanical strength and resistance to contact fatigue of Si3N4 material assures reliable, stable and long operation of rotor in high speed rotation.

l Unlike graphite, silicon nitride is hardly volatilized by oxygen at elevated temperature. This permits long operating life. And this character is most popular in the casting industry of aluminum alloy.

l High thermal shock performance allows the pipe and rotor to insert in and pull out repeatedly from molten aluminum in operation. Pipes and rotors will not be cracked and damaged. Therefore, operation and maintenance become very convenient.

l Excellent corrosion resistance, wear resisting and low wettability, resistance to molten aluminum liquid corrosion makes the operation life longer, and less slagging. If proper maintenance, the using life can be up to 2-3 years. 

l According to actual working condition, our company is able to make optimized design of rotor impeller structure to achieve better degassing effect.