Cryogenic Oxygen Plant for Gold and Silver Mining Applications

Cryogenic Oxygen Plant for Gold and Silver Mining

Description

High Purity Cryogenic Oxygen Plants For Gold Leaching Process In Gold & Silver Mines

(for illustration purpose only, exact as per scope of supply)

Kindly note that our company specialises in high purity cryogenic Oxygen plants for Mining activities, since 1985, manufactures and proposes a wide rage of Oxygen plants, based on the Cryogenic technology to produce high purity Oxygen in liquid and gas form both.

We have launched the latest technology UBP-SERIES cryogenic Oxygen plant for the application of supplying high purity Oxygen 99.7% in pipeline to mines for gold and silver leaching processes.

The main advantage of the UBP Series is that the liquid oxygen in the column/coldbox gets automatically converted into pressurized oxygen gas. This allows for direct pipeline supply to the mine at the required pressure. Since the pressure requirement in most gold leaching plants is between 4 to 15 Bar, you can easily achieve this at the outlet of the plant without the need for an external oxygen compressor.

FLOW SHEET

The Liquid Oxygen in the column/coldbox gets automatically converted into pressurized oxygen gas for Direct pipeline supply from the Oxygen plant to the Gold leaching plant at the required pressure .

MODEL NO.	OXYGEN GAS CAPACITY IN M3/HR	CAPACITY IN TONS PER DAY	OXYGEN PURITY
Capacity Table
UBP 170	170 M3/Hour	5 TPD	99.6%
UBP 300	300 M3/Hour	10 TPD	99.6%
UBP 600	600 M3/Hour	20 TPD	99.6%
UBP 1200	1200 M3/Hour	40 TPD	99.6%
UBP 1800	1800 M3/Hour	60 TPD	99.6%

Note – Higher capacities also available on request upto 200 Tons per day .

Note - 3D VIEW PICTORIAL of UBPM series for mines (Plug & play operation)

Advantages Of Using High Purity Oxygen 99.6% For Gold Leaching

Using high-purity oxygen (99.6%) in gold leaching offers significant operational and financial benefits by accelerating the chemical reaction between gold and cyanide. Using 99.6% purity maximizes the partial pressure of oxygen, which is the primary driver for gold dissolution

Feature	Compressed Air	High-Purity Oxygen (99%+)
Dissolved Oxygen (DO)	8 mg/L (max)	20–40+ mg/L
Leach Time	Standard (24–48h)	Up to 50% faster
Cyanide Usage	High	40% % Reduction
Recovery Rate	Baseline	+5% to +10% improvement

1. Accelerated Leaching Kinetics

Oxygen is the rate-limiting reactant in the Elsner Equation (4Au + 8CN⁻ + O₂ + 2H₂O → 4[Au(CN)₂]⁻ + 4OH⁻).

• Faster Dissolution: Leaching with pure oxygen can be up to five times faster than traditional air-based aeration.

• Reduced Retention Time: High-purity oxygen can reduce required leaching time by up to 50%, allowing for higher daily ore throughput in existing tanks.

2. Improved Gold Recovery Rates

High-purity oxygen 99.6% ensures that dissolved oxygen (DO) levels remain at optimal saturation, even in complex or high-oxygen-demand ores.

• Yield Increase: Implementing oxygen-rich leaching has been shown to increase gold recovery by 5% to 10% .

• Refractory Ores: It is particularly effective for ores containing sulfides (like pyrrhotite), which consume oxygen rapidly and would otherwise starve the gold-cyanide reaction.

3. Reduced Cyanide Consumption

Pure oxygen 99.6% helps minimize the waste of expensive cyanide.

• Chemical Savings: Oxygen-rich leaching can reduce cyanide consumption by 20% to 40%.

• Side-Reaction Prevention: Higher oxygen levels promote the oxidation of competing minerals (like iron and copper) into insoluble salts, preventing them from bonding with and consuming cyanide.

• Environmental Benefit: Lower cyanide usage results in less toxic waste and simplified downstream cyanide destruction.

4. Capital & Operational Efficiency

• Equipment Size: Because the reaction is faster, new plants can be designed with smaller leaching tanks, reducing initial capital expenditure.

• Venting Efficiencies: Pure oxygen 99.6% eliminates the large volume of inert nitrogen found in air, reducing the need for aggressive agitation and reducing gas-escape losses.