The purification process of liquid aluminum alloy is the main means to improve the comprehensive properties of aluminum alloy. In the purification process, the purified gas and solvent are mixed and usedGraphite rotorIt is the most advanced treatment method in the world to purify the aluminum melt by rotary injection. The working principle of the graphite rotor is that the rotating rotor breaks the nitrogen (or argon) blown into the aluminum melt into a large number of dispersed bubbles and disperses them in the metal liquid. Bubbles in the melt absorb hydrogen in the melt by gas partial pressure difference and surface adsorption principle, adsorb oxidation slag, and are brought out of the melt surface with the rise of bubbles to purify the melt. As the bubbles are fine and dispersed, they are uniformly mixed with the rotating melt, and then rotate to slowly float in a spiral shape. The contact time with the melt is long, and the gas flow generated by continuous straight rise will not be formed, thus removing harmful hydrogen in the aluminum melt and significantly improving the purification effect.

Features of graphite rotor

1、Graphite rotorThe rotary nozzle is made of high-purity graphite. The structure of the nozzle not only considers that bubbles should be dispersed, but also uses the centrifugal force generated by stirring the aluminum alloy melt to make the melt enter the nozzle and evenly mix with the horizontally ejected gas to form a gas / liquid flow ejection, which increases the contact area and contact time between bubbles and aluminum alloy liquid and improves the degassing and purification effect.

2. The rotation speed of graphite rotor can be stepless adjusted by frequency converter speed control, up to 700 R / min. Graphite rotor specification: Φ 70mm ~ 250mm, impeller specification: Φ 85mm ~ 350mm, high-purity oxidation-resistant graphite rotor has the characteristics of high strength, high temperature resistance and aluminum flow corrosion resistance. In the process of purification and degassing, the surface of the aluminum alloy liquid in the box is covered with nitrogen, so that the part of the graphite rotor exposed to the aluminum alloy liquid is in the inert gas, preventing high-temperature oxidation of the rotor and extending the service life of the rotor.

3. The impeller shape is streamlined, which can reduce the resistance during rotation, and the friction and scouring force between the impeller and the aluminum alloy liquid is relatively small. So that the degassing rate is more than 50%, the smelting time is shortened, and the production cost is reduced.

4. The surface is treated with special oxidation resistance, and its service life is about 5 times that of ordinary products. It is widely used in the aluminum alloy casting industry.

5. It has a service life of up to 2 months in aluminum processing industries such as aluminum sheet and foil casting and aluminum alloy wheels.