Efficient Online Hydrogen Removal: Launder Type Degassing Unit from Leading China Suppliers and 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 Features
High Degassing Efficiency
Achieves up to 40% efficiency with multi-zone continuous degassing. The sealed box creates an inert space to prevent oxidation slag and secondary pollution.
Reduced Metal Loss
Using a launder for degassing reduces residual aluminum liquid and metal loss, lowers maintenance costs, and makes replacement convenient.
Quick Alloy Switch
No heating device or deep box required. Most liquid is cast by the end of production. Remaining liquid is easily cleaned for fast alloy switching.
Ideal Applications
Perfectly suited for semi-continuous casting lines (e.g., casting rods and recycled aluminum ingots) with frequent alloy changes.
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 (FAQ)
Q1: Why is degassing critical for aluminum molten liquid quality?
During solidification, the precipitation of hydrogen in the aluminum liquid leads to defects like porosity. This destroys the internal continuity of the metal, reduces its effective cross-sectional area, and acts as a source of cracks. Degassing is essential to prevent these issues.
Q2: How does the launder type online degassing unit prevent secondary oxidation?
The unit utilizes a submersible baffle and an insulation cover to create a completely closed space. This prevents outside air from entering the degassing chamber, which significantly reduces the suction and surface oxidation of the aluminum liquid.
Q3: What is the maximum degassing efficiency of this system?
The system achieves a high degassing efficiency of up to 40%. This is made possible by multi-zone continuous degassing, which increases the contact area and contact time between bubbles and the aluminum liquid.
Q4: Why is it easy to switch alloys quickly with this system?
Because the unit has no heating device and no deep box, most of the degassed aluminum liquid is converted into products at the end of each casting run. The minor remaining liquid in the degassing chute can be cleaned out quickly, facilitating swift alloy changes.
Q5: Which production lines are best suited for this degassing unit?
It is especially suitable 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.
Q6: What drive form is utilized for the HMLDU series rotors?
All models in the HMLDU series (from HMLDU-2 to HMLDU-8) utilize a centralized drive system to operate the rotors efficiently.
Efficient Online Hydrogen Removal: Launder Type Degassing Unit from Leading China Suppliers and Factory
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