An Australian gold mine has enhanced its operational efficiency by commissioning an on-site assay laboratory at its carbon-in-leach (CIL) plant. Developed and implemented by Core Resources, this facility enables near real-time analysis of gold assays, allowing metallurgists to make immediate, informed decisions to optimise the CIL circuit. 

Advantages of On-Site Assaying

Previously, the mine relied on off-site testing, which resulted in delays of two to four days for assay results. With the new on-site laboratory, cyanide solution assays from the CIL circuit are available within half an hour of sampling. This rapid turnaround significantly enhances the ability to adjust processes promptly, improving overall plant performance. 

Core Resources’ Role in Laboratory Commissioning

Core Resources managed the commissioning of analytical equipment, development of customised laboratory processes and staff training within a timeframe of just over a month, from mid-November to December 2015. The process included:

• Site Assessment: Core’s ICP/AAS Team Leader, Kellan Poplawski, and Laboratory Manager, Phillip Whittle, visited the site to evaluate existing facilities and determine specific requirements. 
• Method Development: Assay methods were tailored using routine samples from the mine to ensure accuracy and reliability. 
• Staff Training: Technicians received comprehensive training over a five-day period, enabling them to proficiently conduct the assays. 

Overcoming Implementation Challenges

The project faced certain constraints, such as the absence of a furnace typically used to remove sulphide material from solid samples. To address this, Core Resources devised an alternative method by combining aqua regia prior to digestion and increasing solution volumes, effectively eliminating the need for a furnace. 

Impact on Operational Efficiency

The establishment of the on-site assay laboratory has allowed the gold mine to focus more effectively on its core business operations. The ability to conduct rapid, accurate assays on-site has streamlined process control, reduced reliance on external testing facilities, and enhanced overall productivity. 

Core’s expertise in laboratory commissioning and process optimisation continues to support mining operations in achieving greater efficiency and operational excellence.