Degassing Machine Pune | Adtech China

19 de abril Máquina de desgasificación en Pune

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Máquina de desgasificación en Pune

Degassing Machine Pune is based on the principle that dissolved hydrogen gas will move from an area of high concentration (in the melt) to an area of low concentration (in the inert gas).
El hidrógeno gaseoso se dispersa en el metal fundido igual que lo haría si se liberara en cualquier espacio cerrado.
Mantendrá una concentración constante durante todo el proceso de fusión.
El hidrógeno gaseoso puede migrar en el metal líquido casi tan rápido como lo hace en el aire.
Therefore, it is unnecessary to bring every ounce of metal in contact with the inert gas.
The efficiency of aluminum degassing is determined by two factors, the transfer rate across the metal/gas interface and the total surface area available for transfer.

El cloro fue inicialmente el gas elegido, pero debido a su naturaleza peligrosa, la mayoría de las fundiciones pasaron a utilizar otros gases.
Sin embargo, muchas fundiciones no han tenido en cuenta los materiales peligrosos que se liberan al descomponerse cualquier gas especial que se utilice.

Degassing Machine Pune bubbled specialty gases (Chlorine, Freon, or SF6) through the metal to speed the hydrogen transfer across the metal gas interface into large bubbles.
There was a practical limit to hydrogen removal on humid days because as the large bubbles would break the surface, an increased surface area of metal was created which then absorbed more hydrogen from the humid atmosphere.

Degassing Machine Pune works on the principle of increasing the surface area of an insert gas exposed to the metal.
Una mayor superficie aumenta la velocidad de transferencia del metal al gas inerte.

Degassing Machine Pune Procedures
La desgasificación suele llevarse a cabo en una de estas tres áreas de la planta de fundición:

1. En la cuchara de transferencia, utilizada para transportar el metal entre los hornos de fusión y los de mantenimiento de temperatura.
2. En los hornos de crisol, normalmente justo antes de verter el aluminio fundido.
3. En un sistema en línea, cuando el metal se transporta a los hornos de mantenimiento a través de una canaleta.

The first two options are most common and the degassing operation for both is typically accomplished using a rotary impeller degasser (RID).
In practical terms, all desgasificador rotativos are not created equal. It is important to have an optimum head design to produce highly efficient, small bubbles. Significant cost savings may be realized from shorter treatment times and reduced gas usage.
In the past, the metalcasting industry has gravitated toward simple head designs, which are less costly to machine but produce larger bubbles.
This path presents a false economy due to reduced efficiency.

Degassing Machine Pune Adjusting Process Parameters
Once the Degassing Machine Pune RID unit is fully lowered into the liquid metal with the shaft in place, the degassing operation can begin.
The best shaft location is slightly off the centerline of the crucible or ladle to help avoid vortex formation with its circular rotation in the liquid metal.
An offset distance of 2-4 in. from the centerline is usually sufficient.
The use of a baffle plate also is a good idea, because the baffle opposes the circulation movement of metal and reduces vortex formation.