Double rotor degassing machine is specially designed for online degassing liquid aluminum with large flow, high gas content, and high inclusion. It features two independently controlled twin rotors to provide a more robust continuous degassing capability.
The double rotor online degassing machine is directly connected with the flow channel, which can be raised and rotated by a certain Angle to facilitate the replacement of lost parts. Good heat insulation design, can provide 24 hours online uninterrupted degassing; The device has the function of gas underpressure alarm. When the source pressure drops to the limit pressure, the inert gas automatically alarms. The warning light prompts the operator to replace the air source in time to avoid the unqualified situation of liquid aluminum due to lack of air.
As the device is double-rotor, when the device is used as an online degassing device, please prepare a spare air source in advance to facilitate timely replacement in case of under-pressure.
Degassing Principle of Double Rotor Degassing Machine
The liquid aluminum is stirred by a controllable rotating graphite shaft and rotor. Meanwhile, the measured inert gas is injected into the liquid aluminum through the rotor, and it is broken into small bubbles, so that it is evenly dispersed in the liquid. In molten metal, the gas partial pressure of the bubble is zero. Due to the high partial pressure of hydrogen in the liquid aluminum, hydrogen in the liquid aluminum continuously diffuses into the bubble, and some non-metallic inclusions in the liquid aluminum are absorbed on the surface of the bubble, which is useless. Hydrogen gas and some nonmetallic inclusions attach to inert bubbles that float to the surface.
When a special degassing filter box is available, the impurities are isolated before pouring and then desulphurized and deoxidized by the slag. Degassing principle is also recognized, high efficiency, does not affect production. The process can improve the purity of liquid aluminum in a short time, reduce the scrap rate, improve the production efficiency, improve the mechanical properties of castings, and enhance the competitiveness of products, which can not be realized by the traditional degassing method.
Online Degassing Machine Performance
1. Dual rotor online degassing machine can realize continuous degassing of liquid aluminum, improve product quality and do not affect the production process. The unit consists of a housing, cover plate, heating system, pore system and refining. The system has the ability to remove hydrogen, alkali metals and other impurities from aluminum melt.
2, double rotor online degassing machine, heater protection sleeve, thermocouple materials are Ivans independent research and development of silicon nitride material. Unique internal mixing spoiler design ensures good stable degassing effect. Depending on the processing capacity, the equipment can be divided into single chamber single rotor, double chamber double rotor, and three chamber three rotor.
3, the double rotor online degassing machine mainly deals with liquid aluminum containing a certain amount of hydrogen and other residues (alkali metal, slag), removed after the degassing equipment treatment. The process gas (inert gas) or a mixture of inert gas and chlorine gas is injected into the melt through the rotor, which is broken into evenly dispersed microbubbles by the rotor. The microbubbles rise to the surface and melt. During the rise of the microbubbles, the following work is completed: Hydrogen is absorbed into the bubbles and removed. The alkali metals are removed (to form chloride) by chemical reaction with chlorine. The inclusions are captured by bubbles and then rise to the surface of the melt to form slag.
