Air Separation Unit in Steel Plant

Why do steel plants need air separation units?
 

Core requirements for steelmaking:

Oxygen strengthens oxidation reactions, improves smelting efficiency, shortens cycles by 30%-50%, and reduces energy consumption and costs.

Full-process gas support:
Nitrogen is used for continuous casting protection, steel rolling technology, and equipment safety; argon is used for refining outside the furnace and welding protection to ensure steel quality.

Stability and cost advantages:
Continuous gas supply meets the daily consumption of thousands of tons, large-scale equipment reduces unit energy consumption, and operating costs are 30%-50% lower than decentralized gas supply.

Environmental protection and upgrade drive:

Assist low-carbon smelting, support cutting-edge processes such as hydrogen steelmaking; meet the needs of special steel for high-purity gas.
 

 

1. Can the air separation unit meet the instantaneous demand for oxygen during the peak period of steelmaking?
The unit adopts dynamic load regulation technology, which can achieve a rapid response of 0-120% oxygen supply according to the gas consumption fluctuations in different stages of steelmaking oxygen blowing and refining, ensuring the stability of instantaneous oxygen consumption during peak periods and meeting the full process requirements of converter smelting, continuous casting, etc.

2. How to control nitrogen consumption during equipment operation?
Through the intelligent gas recovery system, the nitrogen tail gas from continuous casting protection, pipeline purging and other links is purified and recovered, and the reuse rate reaches more than 60%; at the same time, it is equipped with a pressure adaptive adjustment device to accurately match the nitrogen consumption of each process and reduce the energy consumption per unit product.
 

3. When the device fails, how long will it take to restore gas supply?
We provide "24×7×4" emergency support services, provide remote diagnosis solutions within 2 hours after the failure occurs, and professional engineers arrive at the site (in the same city) with spare parts within 4 hours; key equipment adopts redundant design, and the system can automatically switch to the backup unit when a single module fails to ensure uninterrupted gas supply.

4. Can the device be customized to adapt to the existing steelmaking process?
Customized solutions can be made according to converter/electric furnace capacity, continuous casting equipment specifications, steel rolling process, etc., supporting modular design, such as flexible configuration of oxygen output of 500-5000 tons/day and nitrogen purity of 99.9%-99.999%, and 15-20% expansion interface is reserved to adapt to future process upgrade needs.

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