Improving Gold Mining Efficiency with Oxygen and Oil-Free Air Solutions

Atlas Copco supports these goals with advanced compressed air, oxygen generation, and oil-free blower technologies, helping mines enhance performance while lowering operational costs.

Gold mining operations face several critical challenges:

• High energy consumption: Inefficient equipment increases power usage and operating costs.
• Compressed air inefficiencies: Traditional lobe blowers often waste energy in low-pressure applications. These systems are often inefficient for this application and waste energy.
• Water management demands: Processes like dewatering and wastewater treatment require dependable air systems
• Pneumatic conveying needs: Efficient material transport is essential to maintain productivity.
• Air quality risks: Oil-lubricated systems can introduce contamination into sensitive processes like flotation and leaching.

Addressing these challenges requires a combination of efficient oxygen delivery and clean, reliable low-pressure air.

Oxygen is essential in key gold extraction processes, particularly cyanide leaching used in CIL (Carbon-in-Leach) and CIP (Carbon-in-Pulp) systems.

Increasing dissolved oxygen (DO) levels in the slurry enhances:

• Gold dissolution rates
• Overall recovery yields
• Process stability and efficiency

A controlled oxygen supply ensures faster reactions and more consistent metallurgical performance.

In CIL/CIP processes, oxygen directly impacts how efficiently gold dissolves and binds to activated carbon. Insufficient or inconsistent oxygen flow can slow production and reduce recovery.

Atlas Copco’s on-site oxygen generators, paired with VSD compressors, deliver:

• Precise oxygen flow control
• Stable process conditions
• Continuous 24/7 availability

These generators provide the necessary oxygen purity levels to support the carbon leaching process, helping to optimize process outcomes and improve overall efficiency. 

Beyond extraction, oxygen enhances thermal processes in furnaces used for refining.

Compared to conventional air combustion:

• Higher flame temperatures
• Faster heat transfer
• Reduced fuel consumption (up to 30% savings)
• Lower nitrogen-related NOx emissions
• Improved process efficiency

By replacing nitrogen-heavy air with concentrated oxygen, mining operations can significantly reduce energy costs and emissions.

Atlas Copco’s ZS oil-free screw blowers, including the ZS4VSD and ZS5VSD, are designed specifically to overcome traditional air system inefficiencies in mining.

• 100% oil-free air: Eliminates contamination risks in flotation and leaching
• Energy efficiency: Internal compression is more efficient than conventional lobe blowers
• Variable Speed Drive (VSD): Adjusts airflow to match real-time demand
• High reliability: Ensures continuous operation in critical processes
• Compact design: Easy integration into existing mining setups

1. Froth Flotation: Froth flotation is essential for separating gold from waste material. ZS screw blowers supply consistent, oil-free air to create bubbles needed for this process.
2. Heap and Tank Leaching: With Variable Speed Drive (VSD) technology, ZS4 VSD blowers airflow adjusts dynamically, optimizing oxygen mixing and reducing energy use during cyanide leaching.
3. Pneumatic Conveying: For transporting crushed ore, ZS blowers offer high-velocity, low-pressure air ideal for dilute phase conveying. This method reduces dust and energy waste.
4. Ventilation: Underground mining requires clean, reliable airflow. The ZS blowers deliver high volumes of contaminant-free air, improving worker safety and air quality by reducing the risk of oil contamination. 

Sustainability is now a core priority for mining companies. Atlas Copco solutions can help reduce energy use and certain process-related emissions through:

• Energy-efficient screw blowers that minimize power consumption
• VSD-driven systems that eliminate unnecessary energy use
• Oxy-combustion that reduces emissions and fuel demand
• Oil-free technology that prevents contamination and waste
• On-site oxygen production that significantly reduces transport-related emissions compared to delivered gas supplies, where on-site systems are used as the primary source

Efficiency, reliability, and sustainability are no longer optional in gold mining, they are essential for long-term success.

By integrating:

• Oil-free ZS screw blowers
• Advanced VSD compressors
• On-site oxygen generation (OGV+ VPSA systems)

Mining operations can achieve significant gains by optimizing their processes, boosting gold recovery rates while simultaneously lowering operating costs. At the same time, improved system performance enhances overall process reliability and helps ensure consistent production. These advancements also support mining companies in progressing toward their environmental goals by enabling more efficient and sustainable operations.

Gold mining is evolving, and so are the technologies that support it. From optimized oxygen delivery in CIL/CIP processes to clean, energy-efficient airflow for flotation and conveying, Atlas Copco provides the solutions needed to keep operations running at peak performance.

With a focus on innovation and resource-efficient technologies, Atlas Copco helps mining companies unlock higher productivity while lowering energy use and certain process-related emissions in the applications described.