Cryogenic ASU For Non-Ferrous Metal Smelting

The cryogenic air separation unit separates atmospheric air into oxygen and nitrogen through deep refrigeration and low-temperature rectification. This technology is specifically suitable for smelting plants that require large oxygen volumes, high purity, and consistent performance over extended operating cycles.

Compared with PSA or VPSA systems, cryogenic air separation technology is better suited for metallurgical environments where load fluctuation tolerance, product consistency, and lifecycle cost control are critical.

Working Principle

The system operates based on the physical separation of air components under cryogenic conditions.

1. Air Compression
Ambient air is compressed to the required pressure using industrial-grade compressors.

2. Air Pre-Purification
Moisture, carbon dioxide, and trace hydrocarbons are removed through molecular sieve adsorption to protect downstream cold equipment.

3. Cryogenic Cooling
Purified air is cooled to cryogenic temperatures in plate-fin heat exchangers.

4. Low-Temperature Rectification
Oxygen and nitrogen are separated in distillation columns according to their different boiling points.

5. Product Delivery
High-purity oxygen is supplied to smelting furnaces at controlled pressure and flow, ensuring stable combustion and metallurgical reactions.

This process forms the technical foundation of cryogenic ASU for non-ferrous metal smelting, where reliability and thermal balance are essential.

Oxygen Purity and Flow Capacity

System capacity and purity can be adjusted according to furnace size, oxygen enrichment ratio, and production rhythm.

Operating Temperature and Energy Consumption

Optimized cold balance and reduced refrigeration loss are essential for maintaining stable energy consumption in smelting operations.

Industrial Applications and Project Experience

This solution is widely applied in:

• Copper flash smelting and converting
• Zinc and lead roasting and smelting
• Nickel and cobalt refining processes
• Oxygen-enriched combustion systems

In multiple industrial projects, cryogenic ASU for non-ferrous metal smelting has demonstrated consistent oxygen supply performance under high-temperature, high-load operating environments.

Standards and Certifications

The system design, manufacturing, and inspection comply with major international standards:

• ISO 9001 Quality Management System
• ASME Boiler and Pressure Vessel Code
• PED / CE compliance where applicable
• Industrial oxygen safety regulations

All pressure vessels and critical components undergo factory inspection and testing prior to delivery.

Project Delivery, Customization, and Service

• Project Scope: Engineering design, equipment manufacturing, factory testing, and commissioning support
• Customization: Oxygen purity, flow rate, pressure level, redundancy configuration, and by-product recovery
• Installation Support: On-site technical guidance and cold box erection assistance
• After-Sales Service: Operational support, spare parts supply, and performance optimization

Each project is delivered as a complete gas supply system rather than a standalone piece of equipment.

Shenger Gas specializes in industrial air separation and on-site gas generation solutions. With practical experience in metallurgical and smelting applications, we focus on system stability, energy efficiency, and lifecycle performance. From engineering design to long-term operation support, Shenger Gas delivers solutions tailored to real production conditions, ensuring that every cryogenic ASU for non-ferrous metal smelting operates reliably throughout its service life.

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