In heap leaching, oxygen plays a vital role in the chemical reactions that dissolve metals from ore. Traditional air injection often fails to deliver sufficient oxygen concentration-especially in deep or compact heaps-leading to slower reactions and lower recovery efficiency.
The Heap Leaching Oxygen Generator overcomes these limitations by continuously producing 90–95% pure oxygen on-site using Pressure Swing Adsorption (PSA) or Vacuum PSA (VPSA) technology. The generated oxygen is directly fed into heap irrigation lines or aeration systems, ensuring the leach solution remains rich in dissolved oxygen throughout the process.
Working Principle
Air Compression and Filtration
Ambient air is compressed, cooled, and purified to remove dust, oil, and moisture.
Adsorption and Separation
Molecular sieve beds selectively adsorb nitrogen, allowing oxygen to pass through as product gas.
Cyclic Regeneration
Alternating adsorption and desorption cycles ensure a continuous flow of high-purity oxygen.
Oxygen Delivery
The generated oxygen is stored in a buffer tank and then distributed to heap leach systems through dedicated pipelines.
Key Features
High Purity Oxygen
Generates 90–95% oxygen purity suitable for cyanide and acid heap leaching.
Continuous On-site Generation
Eliminates the need for oxygen cylinders or liquid deliveries, reducing logistics cost and safety risk.
Energy-Efficient Operation
Optimized adsorption cycle ensures low energy consumption and long service life.
Fully Automated Control
PLC-based system monitors flow rate, pressure, and purity in real time, enabling safe and stable operation.
Compact & Modular Design
Available in skid-mounted or containerized structures for fast installation and flexible expansion.
Durable for Harsh Environments
Designed to operate reliably under high temperatures, dust, and altitude variations common in mining areas.
Applications
Gold Heap Leaching (Cyanidation) – Promotes faster gold dissolution and higher recovery rates.
Copper Heap Leaching – Enhances oxidation of sulfide minerals and accelerates copper extraction.
Silver and Uranium Leaching – Maintains stable oxidation potential for efficient metal recovery.
Pre-oxidation & Bioleaching Processes – Supports microbial activity and oxidation efficiency.
Refractory Ore Treatment – Improves oxidation before cyanide leaching, boosting yield.
>>>Benefits for Mining Operations
| Advantage | Description |
|---|---|
| Higher Metal Recovery | Oxygen enrichment accelerates oxidation, improving overall extraction efficiency. |
| Reduced Chemical Consumption | Decreases cyanide, lime, and acid usage, lowering reagent costs. |
| Shorter Leaching Time | Speeds up reaction kinetics and boosts production throughput. |
| Lower Operating Cost | On-site generation eliminates delivery and storage expenses. |
| Eco-Friendly Solution | Reduced chemical use and emissions for sustainable mining operations. |
| Safe & Reliable | No handling of high-pressure gas cylinders; system operates automatically with low maintenance. |
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