Rotary Degassing Equipment is an automatic metal processing system for environmental degassing and cleaning of aluminum and copper alloys.
The rotating degassing equipment adopts the impeller principle with a patented rotor, which can produce small inert bubbles and mix them with the melt. These small bubbles distribute uniformly throughout the melt without disturbing the surface, thus maximizing the contact area between the inert gas and the melt. Effectiveness means higher levels of degassing and cleaning can be achieved and processing time can be reduced.
Machines of various sizes and designs are available to meet the needs of various foundries. Rotary Degassing Equipment is mainly used for the hydrogen (H) and slag removal from molten aluminum.
Degassing unit takes gas flotation principles. The rotor takes inert gas or mixture of chlorine and inert gas into molten aluminum and smash the gas into dispersed tiny bubbles, the bubbles rise to molten aluminum surface and finish the below-stated procedures at the same time:
- H is being absorbed in bubbles and is being removed.
- The chloride is removed (formed by chemical action with alkali metal and chlorine gas).
- Remove slags.
Advantage of Rotary Degassing Equipment
- Low hydrogen content
- Effective melt cleaning
- Improve casting surface finish
- Reduce hard inclusions in castings
- Reduce processing costs
- Improve the tensile strength of castings
- Environmental protection process
- Better elongation
The design standards of degassing efficiency: Average Degassing efficiency is 60%. If use Ar and Mg content ≤1%, the efficiency can reach 0.09cc/100g.
The design standards of lining structure: Lining is made of high silicon molten material, the average working life is 2-3 years. It is featured non-stick aluminum, no contamination. There is a float stopper inside to prevent oxides from being drawn into molten aluminum and the bubbles or slags running out.
The design standards of rotor: It is made of SiN. Working life is 2-5 years. It performances well in corrosion resistance, heat shock resistance, oxidative resistance, abrasive resistance, mechanical strength. Shaft diameter 60mm, head diameter 200mm, which shall reduce resistance in stirring. Speed design 450-550 R/M will crush bubbles and disperse evenly into aluminum. It is cost-effective during long time usage.