Air pretreatment and compression: Ambient air passes through filters to remove dust and impurities before entering a turbine compressor for boosting.
Cooling and purification: The compressed air is cooled by heat exchange with water in an air-cooling tower, and moisture, carbon dioxide, and other impurities are removed by molecular sieve adsorption.
Cryogenic expansion and liquefaction: A portion of the air enters a turbine expander for further cooling and liquefaction, preparing for subsequent distillation.
Distillation separation: The liquid air is distilled in the lower and upper towers to produce high-purity oxygen (99.6%) and nitrogen (99.999%).
Argon separation: A dual-tower refining process, consisting of a crude argon tower and a refined argon tower, produces high-purity argon.
Product output and recovery: The oxygen is heated and supplied to end users, while the nitrogen and a portion of the argon are recycled for molecular sieve regeneration or other processes.
Applications
Air separation units (ASUs) play a critical role in the smelting, refining, and casting of aluminum, copper, zinc, and other non-ferrous metals. High-purity oxygen accelerates combustion and chemical reactions, improving smelting efficiency and production capacity. Nitrogen provides a stable protective atmosphere, effectively preventing oxidation and impurity contamination. Argon ensures material quality and process precision in the production of high-performance alloys and precision casting. This integrated gas supply solution not only improves non-ferrous metal production efficiency, but also optimizes energy utilization, ensures high-quality and consistent end products, and reduces production costs and process risks.
| Quality Index: | |||
| Product | Oxygen / Liquid oxygen | Nitrogen / Liquid nitrogen | Liquid argon |
| Purity | ≥99.6% | ≥99.9% | ≥99.999% |
FAQ
How does NEWTEK customize air separation units for the non-ferrous metals and steel industries?
NEWTEK can tailor air separation units (ASUs) to meet customers' specific needs in smelting, refining, and casting, providing a stable supply of high-purity oxygen, nitrogen, and argon. Through cryogenic separation, molecular sieve adsorption, and turbine expansion process optimization, we ensure that gas yield, purity, and pressure meet production process requirements while also improving energy efficiency and production effectiveness.
How does NEWTEK's turnkey project ensure smooth project delivery from design to operation?
NEWTEK provides full EPC (engineering, general contracting) and turnkey solutions, encompassing project design, manufacturing, transportation, installation, commissioning, and operational training. With a professional team coordinating all aspects, we can resolve interface, communication, and commissioning issues in large and complex industrial projects, ensuring that air separation units are put into production on schedule, safely, and efficiently, providing a one-stop, worry-free delivery experience.
What value-added services can customers receive when customizing air separation units?
Customers can choose customized gas purity, pressure, output, and modular configurations based on their production needs, while also benefiting from NEWTEK's value-added services, including optimized process design, energy-saving control systems, automated monitoring, and maintenance training. Through this turnkey project model, customers can quickly begin production, reduce operational risks, and secure a reliable and continuous gas supply, providing a solid foundation for steel and non-ferrous metal production.
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