Recent metallurgical testwork conducted by Core Resources for West Cobar Metals has delivered promising results for the Bulla Park copper-antimony-silver project in New South Wales. Following outstanding flotation results in January, new leaching testwork has successfully demonstrated the separation of antimony from the copper-silver concentrate, marking a significant milestone in the project’s development.

Encouraging Metallurgical Results

Initial flotation testwork produced a high-grade concentrate with up to 94% copper, 90% antimony, and 88% silver recovery, with grades reaching 19.4% Cu, 7.5% Sb, and 271 g/t Ag. To further enhance the processing strategy, a leach test was completed to assess antimony recovery, achieving 75% antimony extraction from the float concentrate.

This result confirms that antimony can be successfully separated, paving the way for further optimisation work aimed at refining recovery rates and enhancing the saleability of both the copper-silver and antimony products.

Next Steps in Optimisation

With these encouraging results, further testwork is underway to optimise the flotation and leaching processes. The next phase will focus on improving the flotation concentrate’s amenability to leaching by removing siderite, reducing reagent consumption, and increasing the copper and silver grades of the final product.

Unlocking Value in Critical Minerals

Core Resources continues to provide innovative metallurgical solutions to unlock the full potential of complex ore bodies. The success of this testwork supports West Cobar Metals’ strategy to develop Bulla Park as a bulk tonnage, potentially open-pittable copper-antimony-silver deposit, ensuring efficient resource extraction and maximising economic returns.

For full details, read the latest ASX announcement here.