Efficient Online Hydrogen Removal in Aluminum Casting: China Suppliers' Launder Type Degassing Unit from Factory
Introduction
With the continuous development of the application of aluminum materials, the requirements for its inherent quality are becoming higher and higher. The key to ensure the quality of aluminum materials is clean aluminum molten liquid.
Among the factors affecting the purity of aluminum liquid, the precipitation of hydrogen in aluminum liquid during solidification will lead to porosity and other defects, which not only destroys the internal continuity of aluminum, reduces the effective cross-sectional area, but also is the source of cracks.
Therefore, degassing plays an important role in the production of high-quality aluminum.
The launder type online rotating degassing unit is installed between the furnace and the casting machine along the length direction of the launder, and the degassing area is divided into several stages by a baffle to realize multi-stage online degassing and improve the degassing efficiency. The submersible baffle and insulation cover are used to form a closed space to prevent air from entering the degassing chamber, effectively reducing the suction and surface oxidation of aluminum liquid.
Product Feature
The degassing efficiency is high, up to 40%. Multi-zone continuous degassing is adopted to increase the contact area and time between bubbles and aluminum liquid. The overall sealing of the box ensures that the top forms an inert space with the aluminum liquid surface during the casting process, prevents producing more oxidation slag due to liquid oxygenation of aluminum, prevents secondary pollution, and improves the degassing efficiency.
The use of launder for degassing can reduce the residual aluminum liquid and metal loss, lower maintenance costs, and make the launder replacement convenient and fast.
Easy to switch alloys quickly. Since there is no heating device and no deep box, most of the degassed aluminum liquid is made into products at the end of each casting. The remaining aluminum liquid in the degassing chute can be easily cleaned, which facilitates the rapid switching of alloys.
It is especially suitable for semi-continuous casting production lines such as casting rod and recycled aluminum ingot. The alloy of this kind of casting process is changed frequently, and the requirement of hydrogen removal is not high.
Technical Parameters
| Item/Type | HMLDU-2 | HMLDU-4 | HMLDU-5 | HMLDU-6 | HMLDU-7 | HMLDU-8 |
|---|---|---|---|---|---|---|
| Number of rotors | 2 | 4 | 5 | 6 | 7 | 8 |
| Maximum flow (T/HR) | 8 | 20 | 25 | 30 | 35 | 40 |
| Maximum gas consumption (L/min) | 90 | 180 | 270 | 360 | 420 | 480 |
| Driven form | Centralized drive | |||||
Frequently Asked Questions
Why is degassing essential in aluminum casting?
Hydrogen precipitation in the aluminum liquid during solidification causes defects such as porosity. This breaks the internal continuity of the aluminum, reduces the effective cross-sectional area, and acts as a primary source of cracks. Degassing removes this hydrogen to ensure high-quality aluminum.
How does the launder type online rotating degassing unit prevent surface oxidation?
The unit utilizes a submersible baffle and an insulation cover to create a completely closed space. This prevents external air from entering the degassing chamber, effectively reducing suction and surface oxidation of the aluminum liquid.
What is the degassing efficiency of this online system?
The system achieves a high degassing efficiency of up to 40%. This is accomplished through multi-zone continuous degassing, which maximizes the contact area and time between bubbles and the molten aluminum.
Why is this unit suitable for quick alloy switching?
Because the unit features no heating device and no deep box, the majority of the degassed aluminum liquid is cast into products at the end of each run. The minimal remaining liquid in the degassing chute is easily cleaned, allowing for fast alloy changes.
Which production lines benefit most from this degassing unit?
It is particularly ideal for semi-continuous casting production lines, such as those producing casting rods and recycled aluminum ingots, where alloys are changed frequently and hydrogen removal requirements are moderate.
Efficient Online Hydrogen Removal in Aluminum Casting: China Suppliers' Launder Type Degassing Unit from Factory
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