BIOX is widely recognized as a proven, environmentally responsible pre-treatment method for refractory ores. A PSA Oxygen Plant serves as the backbone of the process by supplying the oxygen needed for bacterial oxidation. It replaces expensive liquid oxygen or unreliable air injection systems, providing substantial operating cost savings and greater process control.
The PSA Oxygen Plant for BIOX enables:
- Efficient bacterial oxidation of sulfide minerals
- High dissolved oxygen levels in all BIOX tanks
- Stable bacterial growth and metabolic activity
- Improved leaching recoveries in downstream gold extraction
- Lower operating cost and simplified logistics
This system is specially engineered for the demanding oxygen requirements of large-scale and continuous BIOX operations.
Why BIOX Plants Need PSA Oxygen Systems
BIOX bacteria-mainly Acidithiobacillus ferrooxidans, A. thiooxidans, and Leptospirillum ferrooxidans-are strictly aerobic, meaning they depend on oxygen to oxidize sulfides such as:
Pyrite (FeS₂)
Arsenopyrite (FeAsS)
Chalcopyrite (CuFeS₂)
These oxidation reactions require substantial oxygen input. If oxygen levels fall below optimal, the BIOX reaction rate declines, increasing residence time and lowering gold liberation efficiency.
A PSA Oxygen Plant provides:
High oxygen purity to ensure rapid bacterial oxidation
Stable oxygen supply for uniform tank aeration
Lower OPEX than bulk LOX consumption
Better control over oxygen transfer and DO levels
It is the most efficient long-term oxygen solution for BIOX processing.
Continuous Operation (24/7)
Designed for nonstop biological processing lines.
Advanced PSA Technology
Adsorbs nitrogen using molecular sieves and delivers high-purity oxygen on site.
Energy-Efficient Engineering
Low power consumption optimized for long-term mining operation.
PLC/SCADA Automation
Real-time monitoring of purity, pressure, flow rate, and system status.
Rugged, Mining-Grade Construction
Built with corrosion-resistant materials suitable for humid, acidic, and high-wear environments.
Modular & Expandable
Capacity can be increased as throughput or ore hardness increases.
Customizable
| Parameter | Typical Value |
|---|---|
| Oxygen Purity | 90–95% |
| Production Capacity | 10–500Nm³/h |
| Delivery Pressure | 0.4–0.6 MPa (boosters optional) |
| Automation | Fully automated PLC/SCADA |
| Installation Type | Skid-mounted / Containerized |
| Filtration | Multi-stage air purification |
| Duty Cycle | 24 hours/day, continuous |
All parameters can be customized according to ore grade, BIOX tank size, altitude, and project requirements.
How the PSA Oxygen Plant Supports BIOX Reactors
BIOX reactors typically operate in a multi-stage configuration (e.g., 6–8 tanks in series). Each tank requires high dissolved oxygen concentration to maintain bacterial activity.
The PSA Oxygen Plant ensures:
1. Consistent Aeration Across All Tanks
Equal oxygen distribution avoids rate-limiting tanks and improves oxidation uniformity.
2. Higher Oxidation Rates
More oxygen → faster sulfide breakdown → improved gold liberation.
3. Stable Bacterial Metabolism
Aerobic bacteria thrive in oxygen-rich environments.
4. Reduced Residence Time
Improved reaction kinetics shorten BIOX cycle time.
5. Lower Cyanide or Reagent Consumption Downstream
Better pre-oxidation reduces chemical demand in gold leaching circuits.
Application Scenarios
The PSA Oxygen Plant for BIOX is ideal for:
✔ Refractory Gold Mines Using BIOX Pre-Treatment
Ensures optimal bacterial oxidation of sulfide-rich ore.
✔ Arsenopyritic and Pyritic Gold Deposits
Speeds up oxidation of stubborn mineral matrices.
✔ High-Sulfide Concentrate Treatment Plants
Maintains reaction intensity across thick slurries.
✔ Remote or High-Altitude Mining Projects
Independent oxygen generation without LOX logistics.
✔ Green & Responsible Mining Projects
BIOX + PSA supports low-emission, environmentally safe operations.
Benefits of Using PSA Oxygen for BIOX & System Configuration
Operational Benefits
Higher oxidation efficiency
Faster mineral breakdown
Improved solution chemistry control
Supports consistent microbial activity
01
Economic Benefits
Lower operating cost vs liquid oxygen
Reduced transport and storage expenses
Fewer downtime events
Longer equipment lifespan
02
Environmental Benefits
Safer than storing high-pressure LOX
Lower carbon footprint
Supports green mining regulations
03
Standard Configuration
PSA oxygen generator
Air compressor
Refrigeration dryer
Filtration system
Oxygen storage tank
Oxygen distribution lines
PLC control cabinet
04
Optional Modules
High-pressure oxygen booster (up to 10–15 bar)
Stainless steel BIOX aeration injectors
DO monitoring & closed-loop oxygen control
Containerized mobile oxygen plant
Remote monitoring module
05
Why Choose Our PSA Oxygen Plant for BIOX
Specialized for biological oxidation processes
Proven PSA technology with stable oxygen purity
Designed for long-term continuous operation
Resistant to corrosion from BIOX environmental conditions
Custom engineering available for any plant size
| Experienced in supplying mining oxygen systems globally | ||
| Comprehensive technical support and after-sales service |
The plant is built to be dependable, efficient, and aligned with modern mining requirements.
Economic Impact
Implementing a Bio-oxidation Oxygen Generator delivers measurable benefits:
Reduced Operating Cost: Up to 40% lower oxygen supply expenses compared to liquid oxygen.
Improved Recovery Yield: Up to 20% increase in gold recovery from refractory ores.
Higher Process Throughput: Enhanced microbial oxidation rates shorten residence time.
Lower Cyanide Consumption: Better oxidation reduces cyanide demand in downstream leaching.
The result is a more profitable and sustainable mining operation.
Environmental and Sustainability Benefits
Bio-oxidation itself is an environmentally friendly alternative to high-temperature roasting or pressure oxidation (autoclaving).
When combined with on-site oxygen generation:
- There are no combustion emissions or toxic gas by-products.
- Energy consumption is lower, since PSA technology uses ambient temperature operation.
- The system supports clean, low-carbon gold production, aligning with ESG and sustainability standards in the mining industry.
Maintenance and After-Sales Support
Our oxygen systems are designed for durability and minimal maintenance:
Routine filter replacement and system inspection every 3–6 months
Molecular sieve replacement approximately every 5–7 years
Remote monitoring and diagnostic capabilities
Global after-sales network with 24/7 technical assistance
We provide full installation, commissioning, and training services, ensuring that your team can operate and maintain the system confidently.
Safety and Compliance
Each generator is equipped with:
- Oxygen purity and pressure sensors
- Automatic shutdown functions for abnormal operation
- Pressure relief valves and emergency stops
- Alarms for deviation, overload, and temperature control
The systems comply with ISO9001, CE, and industrial gas safety standards, ensuring secure and reliable performance throughout operation.
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