Use of screw air compressor in magnesium alloy production line

Screw air compressor plays a role in magnesium alloy production lineKey power sourcesRole, its use runs through the entire process of smelting, casting, and processing, and is specifically reflected in the following links:

1. smelting process

• Crucible protective gas transfer: Magnesium has active chemical properties. Inert gas (such as argon) is needed to cover the liquid surface to prevent oxidation during smelting. The screw compressor provides a high-pressure gas source for the gas delivery system to ensure stable injection of argon into the crucible.
• Pneumatic valve control: Valves such as feeding and slag discharge of the smelting furnace rely mostly on pneumatic actuators, and compressors ensure their rapid response.

2. Casting and Forming

• Die casting machine power: Magnesium alloy die-casting requires high pressure (>100 bar) to inject liquid metal into the mold. The screw compressor provides an instantaneous high-pressure air source through a booster.
• Mold cooling control: Some production lines use compressed air to assist mold cooling to speed up the production rhythm.

3. Cleaning and post-processing

• Sand cleaning of castings: The compressed air drives the nozzle to clean the casting sand on the surface of the casting. The oil-free compressor avoids oil pollution on the magnesium alloy.
• delivery system: Pneumatic conveyor belts or pipes are used to transport magnesium ingots and castings to reduce metal collision damage.

4. Environmental protection and safety

• dust collection: Compressed air blows back into the filter cartridge dust collector to clean up magnesium oxide dust generated by smelting.
• Emergency fire extinguishing: Conventional fire extinguishing agents are prohibited for magnesium fires, and some production lines are equipped with dry powder fire extinguishing systems driven by compressed air.

5. special requirements

• oil-free standard: Magnesium alloy is sensitive to oil pollution and needs to be selectedoil-free screw compressor(ISO 8573-1 Class 0), or a multi-stage filtration device.
• explosion-proof design: Magnesium powder is explosive. The compressor must comply with ATEX explosion-proof certification, and the motor is flameproof.

Selection suggestions

• pressure rating: Select a 10-30 bar model according to the requirements of the die-casting machine. A supercharger is required for the supercharging scene.
• flow matching: Select the model according to the maximum gas consumption of the production line, and it is recommended to reserve a 20% margin.
• energy-saving configuration: Priority should be given to permanent magnet variable frequency screw machines to adapt to the intermittent gas consumption characteristics of the production line and reduce energy consumption.

The stability and cleanliness of screw compressors directly affect the yield and surface quality of magnesium alloys, and are key planning links in production line investment.