Box type in-line rotor degassing unit (BDU)

Box type in-line rotor degassing unit (BDU)

• Dehydrogenation/impurity removal/dealkalization!
• One of the most effective molten aluminum degassing technologies, the first choice for high-end aluminum castings!

Equipment Introduction
• The BDU is usually installed between the discharge outlet of the smelting furnace and the filter box. Melts flow into the BDU and rotate the rotor to break inert gases, forming a large quantity of dispersed bubbles, which then enter into the aluminum melts. After collision, capturing, surface adsorption and partial pressure action, the bubbles rise with gases and take hydrogen and oxide slags out of melts, making them into scums. Then, aluminum melts outflow from the degassing unit outlet, thus realizing the purpose of continuous in-line refining.
• The BDU offers more advantages than the commercially available mainstream box-type degassers. For example, multiple key technologies, such as box tightness and anti-turbulent flow on molten aluminum surface, have been improved, ensuring the high-efficiency, continuously stable and low-cost operation of the degassing unit.

Equipment Features
• Degassing efficiency is above 60%
　- Optimized dispersion of process gases in melts;
　- The maximum area and time of contact between dispersed bubbles and melts;
　- The box is completely sealed, ensuring a stable inert gas environment;
　- There is no turbulent effect on the melt surface.
• Easy to install and maintain. The lining of the preformed degassing box is easy to replace, minimizing production downtime.
• Long component life, low maintenance and operation costs.
　- The heater and heater protection tube have a service life of more than 3 months;
　- The box has a service life of more than 1 year;
　- The rotor and rotating shaft have a service life of more than 3 months;
　- Gases can be cooled without the rotor rotating the main shaft.
• The problem of excess aluminum storage in the box is solved.
　- A wholly tiltable degassing unit is optional. It can be tipped over at a specified time before the end of casting to pour all molten aluminum stored in the box into the launder to finish casting, thus solving the problem of excess aluminum storage in the box.

Main Performance Parameters

　Notes: Mixed gases, such as chlorine and argon, can be added as the case may be.

　　　The degassing effect refers to 3xxx alloy.

Main performance parameter specifications of the BDU

　Notes: Customizable according to customer needs
　1. Three-chamber/four-chamber degasser
　2. Degassing box tipping function or overall degassing box (with launder) tipping function are available to choose from.