West Cobar Metals Limited (ASX: WC1) has provided a second interim update on leaching testwork at its 100% owned Bulla Park copper antimony project in NSW.
Flotation testing recovered 93.6% of feed antimony to float concentrate, and leach testing extracted 88.2% of the antimony from flotation concentrates.
Ongoing sighter testwork achieved higher recoveries in both flotation and leaching, leading to two potential product streams: Copper-silver concentrate which is low in arsenic, and an antimony product.
West Cobar Metals’ managing director, Matt Szwedzicki, commented, “The latest leach test in our series has shown that antimony can be successfully separated at high recovery from the copper concentrate using a simple and straightforward flotation and leaching process that produces high copper, silver, and antimony recoveries.”
Globally, antimony mineralization is typically found in small veins. However, the Bulla Park deposit is a bulk tonnage, potentially open pittable copper, antimony, and silver deposit. It has unique mineralogy due to low sulphide content in easily separable sandstone – siderite – barite gangue. The deposit lies west of Cobar, central NSW in a favourable location benefiting from established infrastructure nearby and proximity to the mining hub of Cobar.
Additionally, testwork is at a preliminary stage, and optimization of flotation and leach tests is expected to continue to further improve the results.
To find out more, please visit www.westcobarmetals.com.au
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