Model Selection |
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No. |
Models |
Capacity (Nm3/hr) |
Purity |
Power consumption of 1Nm3 oxygen produced (kw/h) |
Number of bottles filled in 12 hours (pcs) |
Operator needed |
| 1 | NTK-5P | 5 | 95%+-1% | 3.54 | 10 | 2 |
| 2 | NTK-10P | 10 | 95%+-1% | 2.52 | 20 | 2 |
| 3 | NTK-15P | 15 | 95%+-1% | 2.31 | 30 | 2 |
| 4 | NTK-20P | 20 | 95%+-1% | 2.13 | 40 | 2 |
| 5 | NTK-25P | 25 | 95%+-1% | 2.01 | 50 | 2 |
| 6 | NTK-30P | 30 | 95%+-1% | 2.09 | 60 | 2 |
| 7 | NTK-40P | 40 | 95%+-1% | 1.81 | 80 | 2 |
| 8 | NTK-50P | 50 | 95%+-1% | 1.94 | 100 | 2 |
| 9 | NTK-60P | 60 | 95%+-1% | 1.62 | 120 | 2 |
| 10 | NTK-80P | 80 | 95%+-1% | 1.92 | 160 | 2 |
| 11 | NTK-100P | 100 | 95%+-1% | 1.83 | 200 | 2 |
| Design basis: Altitude：≤500m;RH：≤80%;Temperature：0℃-38℃;Filling pressure: 150Bar 40L Type Standard Cylinder | ||||||
PSA Oxygen Generators for Gold Mining
Enhance the oxidation reaction of sulfide ores
PSA oxygen production equipment can provide 90%-95% pure oxygen, significantly improving the oxidation rate of sulfides (such as pyrite and arsenopyrite).
4FeS₂ (pyrite) + 11O₂ → 2Fe₂O₃ (hematite) + 8SO₂↑
This reaction releases the encapsulated gold particles and improves the subsequent leaching efficiency.
Optimize the cyanidation gold extraction process
In the cyanidation leaching process, oxygen participates in the reaction as a key oxidant:
4Au + 8CN⁻ + O₂ + 2H₂O → 4[Au(CN)₂]⁻ (gold cyanide complex) + 4OH⁻
High-purity oxygen can accelerate the reaction rate, shorten the leaching cycle and improve the gold recovery rate.
Environmentally friendly treatment of cyanide-containing wastewater
Use ozone (O₃) generated by oxygen to decompose highly toxic cyanide:
CN⁻ + O₃ → CNO⁻ (cyanate) + O₂
2CNO⁻ + 3O₃ + H₂O → 2CO₂↑ + N₂↑ + 2OH⁻ + 3O₂
This process reduces the risk of environmental pollution.
Supports biological oxidation technology
In the bioleaching method, oxygen promotes the activity of acidophilic bacteria:
4Fe²⁺ + O₂ + 4H⁺ → 4Fe³⁺ + 2H₂O
Iron ions further oxidize sulfides to release gold particles.
Technical advantages
Economical efficiency: PSA equipment consumes less energy than traditional cryogenic methods, and saves 30%-50% of long-term operating costs.
Flexibility: Supports modular deployment to meet the oxygen supply needs of remote areas of mines.
Safety: Low-pressure operation (0.05-0.6MPa) reduces the risk of explosion.
Applicable scenarios
Difficult-to-process gold mines: For complex ores containing arsenic and sulfur, high oxygen concentration is required to break through the encapsulation structure.
Large-scale mining: PSA oxygen production equipment (purity 90%-93%) is more suitable for thousand cubic meters/hour level needs.
FAQ
1. What role does the PSA oxygen generator play in gold mining?
The PSA oxygen generator significantly enhances the efficiency of mineral oxidation by increasing the oxygen concentration (usually up to 90%-95%). Traditional compressed air contains only 21% oxygen, and the oxidation effect is limited, while high-purity oxygen can accelerate the gold leaching process and improve the extraction rate of precious metals.
2. How to choose a PSA oxygen generator model suitable for gold mining operations?
The following parameters need to be focused on:
Processing capacity: Select the oxygen production per hour (such as 200-5000m³/h) according to the scale of the mine, which needs to match the volume of the leaching tank and process requirements.
Environmental adaptability: If the mining area is located at high altitude or low temperature environment, it is necessary to select equipment with low pressure resistance and antifreeze design, and configure a booster device.
Energy consumption and stability: Oil-free air compressor system is preferred to avoid oil contamination of molecular sieves, and models with intelligent monitoring functions are selected for remote management.
3. What may be the cause of insufficient oxygen purity? How to deal with it?
Molecular sieve failure: Long-term use or oil/water in the intake air will cause the adsorption capacity to decrease, and the molecular sieve needs to be replaced every 5-8 years.
Valve failure: Check whether the solenoid valve or pneumatic valve is damaged, replace it in time and maintain it every 6 months.
Oxygen meter error: Calibrate the instrument or replace the sensor to ensure that there is no leakage in the pipeline.
4. What should be paid attention to in the daily maintenance of the equipment?
Regular cleaning: Replace the air filter element every 4000 hours, and clean the condenser of the cold dryer to prevent blockage.
Key component inspection: Monitor the operating status of the compressor (such as oil level, belt tightness), and regularly replace the piston ring of the piston booster (every 2000-3000 hours).
Long-term idle treatment: After cleaning the equipment, store it in a dry environment, start it regularly and check the sealing.
5. What is the operating cost of the PSA oxygen generator?
Initial investment: The equipment purchase cost is high, but compared with liquid oxygen supply, the cost can usually be recovered within 2 years.
Long-term cost: The main expenditure is electricity (about 70%), and the maintenance cost is low (the life of the molecular sieve is 5-8 years, and the annual replacement cost of the filter element is about 1,000 yuan).
Energy-saving design: Choosing a model with residual pressure recovery or frequency conversion control can reduce energy consumption by 10%-20%.
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