Cryogenic air separation (CAS) is a core technology for oxygen supply in the steel industry. Ambient air is first compressed, cooled, and liquefied in the ASU. Then, through cryogenic distillation, the air is separated into high-purity oxygen, nitrogen, and argon based on the boiling points of the components. This process ensures high-purity, stable, and reliable oxygen output, meeting the high-temperature, high-load requirements of steel production.
ASUs offer a variety of oxygen supply methods: gaseous oxygen can be delivered directly to blast furnaces (BFs), basic oxygen furnaces (BOFs), and other steelmaking processes via a pipeline network for immediate use; liquid oxygen can be stored in large cryogenic tanks to supplement gas supplies or address demand fluctuations. Furthermore, modern ASUs can customize oxygen with varying purities, pressures, and yields to meet the specific process requirements of steel mills, fully satisfying their individual production needs.
Applications
Air separation units (ASUs) are used not only in steelmaking but also in rolling mills, iron ore processing, nonferrous metal refining, and various auxiliary operations requiring oxygen for combustion or process intensification. By continuously supplying high-purity oxygen, ASUs significantly improve the efficiency of metallurgical and chemical processes, accelerating reaction rates while optimizing thermal energy utilization. This not only enhances overall production efficiency but also improves product quality and consistency, creating greater value for businesses in a highly competitive market.
| Quality Index: | |||
| Product | Oxygen / Liquid oxygen | Nitrogen / Liquid nitrogen | Liquid argon |
| Purity | ≥99.6% | ≥99.9% | ≥99.999% |
FAQ
What is the purpose of an air separation unit?
Air separation units (ASUs) separate ambient air into high-purity oxygen, nitrogen, and argon. They are widely used in industries such as steel, nonferrous metals, chemicals, glass, and energy. They provide a stable and reliable supply of industrial gases for smelting, chemical reactions, combustion enhancement, and protective atmospheres. Through customized design, ASUs can meet varying production and purity requirements, providing companies with efficient and cost-effective gas solutions.
What are the uses of oxygen in the steel industry?
In the steel industry, oxygen is primarily used in blast furnace ironmaking, basic oxygen furnace (BOF) steelmaking, and other smelting processes. High-purity oxygen accelerates chemical reactions, reduces carbon content, improves production efficiency and product quality, and optimizes energy use, resulting in higher production and economic benefits for companies.
How does NEWTEK provide integrated solutions?
Combining our expertise in gas engineering and our resource integration capabilities, NEWTEK offers comprehensive EPC (engineering, procurement, and construction) and turnkey project services, encompassing design, manufacturing, installation, commissioning, and operation. We are able to resolve communication, interface and coordination issues in large and complex industrial projects, ensuring on-time project delivery and stable operation, and providing customers with a one-stop, worry-free experience.
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