Strategic Minerals lifts Redmoor tungsten recovery
Strategic Minerals on Friday reported a significant improvement in tungsten recovery at its Redmoor tungsten/tin/copper project in the UK, with results from a new metallurgical study expected to enhance project economics ahead of an updated resource estimate.
The Aim-listed company said overall tungsten oxide recovery increased to 85.8%, up from 72.0% in a 2020 scoping study, representing a 19.2% relative uplift. Tungsten is the primary economic driver at Redmoor.
The study, undertaken by subsidiary Cornwall Resources, will feed into an upcoming mineral resource estimate update and revised economic sensitivity assessment.
“These results further demonstrate the quality of mineralisation at Redmoor, with strong recoveries for the polymetallic mineralisation,” Cornwall Resources MD Dennis Rowland said.
The study also confirmed, for the first time, that silver can be recovered as part of the copper flotation circuit, with a recovery rate of 58.7% to copper concentrate at a grade of 270 g/t. Silver is expected to be treated as a smelter credit in future economic evaluations.
While tin and copper recoveries remained stable at 67.2% and 82.4% respectively, the company said the report identified pathways to improve recoveries further during planned prefeasibility study work.
Strategic Minerals executive director Mark Burnett said the improved tungsten recovery could be “transformational” for the project, particularly in the context of rising ammonium paratungstate prices over the past 15 months.
The combined gravity concentrate achieved an upgrade factor of 22.5 times for tungsten and 15.8 times for tin, underscoring the strength of the orebody.
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