Liquid Aluminum Degassing, Rotary Degassing Device

Liquid Aluminum Degassing

As the demand for high-quality aluminum products increases, especially in the aerospace industry, the need to reduce inclusions in molded products has also increased. A popular degassing method involves introducing nitrogen gas into liquid aluminum. Because nitrogen is used as the refining medium, it will not pollute the environment. Hydrogen is attracted by nitrogen bubbles, then absorbed by aluminum and released to the surface.

Aluminum and aluminum alloy melts contain large amounts of hydrogen, metal, and non-metallic inclusions. If the above harmful substances cannot be removed in time before casting, casting defects such as pores, inclusions and looseness will be formed inside and inside the casting, which will seriously affect the physical, chemical, mechanical and deep processing properties of the casting, and a large amount of waste products.

The liquid aluminum dispositivo de desgaseificação for casting can greatly improve the quality and output of aluminum products, thereby increasing the profitability of aluminum melting and casting plants.

Dispositivo rotativo de desgaseificação

O impulsor rotativo funciona aumentando a área de superfície do gás inerte introduzido no metal.
As bolhas de nitrogênio menores produzidas pelo processo do impulsor apresentam uma área superficial total maior e retêm mais hidrogênio.
A menor perturbação da superfície causada pelas bolhas menores também faz com que menos hidrogênio seja reabsorvido pelo metal a partir da umidade atmosférica.
The aluminum degassing process in the casting process is to remove inert gases (argon, nitrogen) through the rotating shaft and rotor.
The energy of the rotating shaft results in the formation of a large number of small bubbles, thereby providing a very high surface area to volume ratio.
The large surface area promotes the rapid and effective diffusion of hydrogen into the bubbles, so that the hydrogen activity in the liquid and gas phases is equal.
Em comparação com a desgaseificação por fluxo, o desgaseificador rotativo consegue remover o hidrogênio de forma mais completa.