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Why does air separation equipment use aluminum as raw material?

Why does air separation equipment use aluminum as raw material?
May 21, 2025
Author: DEAR AST

Aluminum is widely used as a raw material in air separation equipment, mainly based on its advantages in physical properties, cost-effectiveness, and processing performance.
1. Excellent thermal conductivity: Aluminum has a high thermal conductivity, far higher than other metal materials such as steel. In air separation equipment, efficient heat exchange is a key link, and the excellent thermal conductivity of aluminum enables components such as heat exchangers to transfer heat more effectively, improving the overall efficiency of the equipment.
2. Good low-temperature performance: Air separation equipment usually needs to operate in low-temperature environments, and aluminum can still maintain good mechanical properties and toughness at low temperatures, making it an ideal material for manufacturing low-temperature components such as cold boxes, heat exchangers, etc.
3. Lightweight and High Strength: Aluminum has a low density and is lightweight, but its strength is relatively high. In air separation equipment, the use of aluminum can reduce the overall weight of the equipment, lower transportation and installation costs, while maintaining the structural strength of the equipment.
4. Corrosion resistance: Aluminum can form a dense oxide film in air, which can effectively protect the aluminum material from corrosion. In air separation equipment, the corrosion resistance of aluminum is particularly important as the processed gas may contain corrosive components.
5. Good processing performance: Aluminum is easy to process into various shapes and sizes, suitable for manufacturing complex air separation equipment components. Meanwhile, aluminum has good welding performance, which facilitates the connection and assembly of equipment components.
6. Cost effectiveness: Although the unit price of aluminum may be higher than some steel, considering its lightweight, high strength, corrosion resistance, and good processing performance, the overall cost of using aluminum in air separation equipment may be lower.

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