degassing unit is the first key process that determines the application of aluminum alloy materials. It determines whether aluminum alloy materials have metallurgical defects and high-performance heritability, and dominates its application and development in various fields.

In casting and rolling production, the amount of melt filtration per unit time is small, and the flow rate is slow. Casting and rolling are mostly pure aluminum and soft alloys, and the green body is easier to purify. Generally, 50ppi and 30ppi two-stage degassing unit are used. The thickness and area of ​​the filter can be determined according to specific overflow calculations to meet t degassing unit requirements.

Compared with casting and rolling, the production situation of castings is more complicated. The flow rate is large, and the filtering method of the filter is the same as that of casting production.

The filtering flow is equivalent to more than 253.5 times that of the pouring roller, which reduces the filtering effect.

In order to ensure the same filtration efficiency, the flow area of ​​the filter should be increased to make the flow per unit area of ​​the filter equal to it.

Secondly, in the duralumin and super-hard aluminum alloy melts, the possibility of containing fine slag particles is much greater than that of pure aluminum and soft alloys. Therefore, the filtration efficiency cannot be reduced, but it must be greatly improved in order to meet.

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Therefore, it is best to use the degassing unit. It not only increases the filtration surface area in contact with the melt but also reduces the flow rate per unit area of ​​the melt. It ensures filtration efficiency and flow rate. It can also reduce the filter pore size and increase the size of the filter to meet the production requirements. Porosity to improve filtration accuracy and reduce the number of residual fine particles in the melt.