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Revolutionising gold leach and CIL processes

by Rebecca Todesco
November 21, 2024
in News
Reading Time: 4 mins read
A A
3AM45 impellers and shaft on the ground. Image: EBARA HG

3AM45 impellers and shaft on the ground. Image: EBARA HG

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In an industry where maximising ore recovery is critical, mining organisations turn to companies that differentiate themselves through the provision of top-tier solutions.

Hayward Gordon, a leading brand in industrial mixing technology, distinguishes itself by offering its 3AM45 impellers with a unique mid-solidity axial flow design. This design is unparalleled in the industry and provides exceptional benefits for carbon-in-leach (CIL) and gold leach applications.

Enhanced gas handling and dispersion efficiency

The mid-solidity impellers are engineered to improve the efficiency of oxygen dispersion compared to the low-solidity hydrofoil. Their unique design ensures oxygen is effectively broken into smaller bubbles, enhancing mass transfer rates and ensuring uniform oxygen distribution throughout slurry. This is crucial for maximising gold recovery rates and improving overall process efficiency.

Superior slurry mixing performance

In gold leach and CIL applications, mid-solidity impellers provide superior mixing performance by maintaining a balance between shear and flow. The impeller’s unique blade surface area allows it to handle apparent viscosities exhibited by the slurry that can occur when the solids concentrate reaches approximately 50 per cent by weight.

This flow and shear balance is essential for preventing sedimentation of the solids and ensuring a homogeneous mixture. The improved mixing performance leads to better contact between the gold ore and the leaching agents, resulting in higher gold extraction rates.

Reduced carbon breakage

An advantage of mid-solidity impellers in CIL applications is reducing carbon breakage. With more mixing at a lower tip speed, the design minimises the mechanical stress on activated carbon particles, preserving integrity and enhancing absorption capacity. This boosts efficient gold recovery and reduces the need for frequent carbon replacement.

Energy efficiency and cost savings

Through impeller design optimisation, these mixers require less power to achieve desired mixing results, leading to significant energy consumption savings. When comparing the impeller power number (Np) to the impeller flow number (Nq) of other types of impellers, the AM mid-solidity hydrofoil provides maximum flow while reducing the mixers’ operating costs. This efficiency contributes to a lower cost of ownership and a more sustainable and environmentally friendly gold leaching process.

Versatility across applications

Mid-solidity impellers are versatile and can be effectively used in various stages of the gold leach and CIL processes. Their robust design ensures reliable performance and longevity, making them suitable for challenging environments. Whether in the initial leaching tanks or the final CIL stages, these impellers consistently deliver high-quality mixing results, thereby enhancing the overall effectiveness of the gold extraction process.

3AM45 impellers in gold leach tank. Image: EBARA HG
3AM45 impellers in gold leach tank. Image: EBARA HG

Custom solutions

Maintaining the optimal performance of equipment is crucial. Agitators essential for mixing and maintaining homogeneity in gold leach or other applications can benefit from a review of the installed mixer.

EBARA HG’s approach to upgrading agitators involves thoroughly assessing the existing equipment and process requirements. EBARA HG can recommend and implement upgrades that enhance performance using the latest impeller technology and extensive process knowledge.

Industries evolve, and so do their processes. Changes in production methods, raw materials, or regulatory requirements can necessitate modifying existing agitators.

EBARA HG’s flexibility and adaptability makes it an ideal partner for retrofitting agitators to meet new process demands. EBARA HG provides customised solutions, ensuring upgraded equipment aligns perfectly with the updated process parameters.

EBARA HG’s portfolio includes a variety of Hayward Gordon mixers and agitators, each designed to handle specific applications and built to deliver reliable and efficient performance. This versatility allows the company to cater to various industries, from mining to chemical processing.

EBARA HG’s commitment to innovation and quality makes it a leader in agitator upgrades and retrofits. EBARA HG’s ability to diagnose performance issues and adapt to changing process requirements ensures its clients can maintain optimal operations. In choosing the Hayward Gordon brand, industries can benefit from enhanced efficiency, reduced operational costs and improved product quality.

For more information, visit ebarahg.com

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