Cornwall Resources Ltd’s recent metallurgical study showed a “significant improvement” in tungsten overall recovery and “confirmed silver recoverability” from the Redmoor project.
QUALITY
Parent company Strategic Minerals plc said that recoveries for tin and copper remained “broadly unchanged” at 67.2% and 82.4%, respectively.
An increase in tungsten trioxide recovery, from 72.0% to 85.8%, represented “a 19.2% relative uplift in overall tungsten trioxide recoverability”.
“Recovery of silver has been confirmed, with 58.7% recovery to copper concentrate at a grade of 270g/t, ” added Strategic.
“The combined gravity concentrate resulted in an 85.8% recovery of WO3 [tungsten trioxide] and a 67.2% recovery of tin.
“The resultant upgrade from feed is 22.5x and 15.8x for WO3 and tin respectively.”
Cornwall Resources general manager Dennis Rowland said: “These results further demonstrate the quality of mineralisation at Redmoor, with strong recoveries for the polymetallic mineralisation.
“The substantial increase in tungsten recovery, the primary economic driver of the project, is expected to positively feed into the project economics as part of the forthcoming MRE and updated economic assessment.
“For the purposes of the economic sensitivity assessment, silver will be counted as a credit on the copper concentrate.”
Mr Rowland added that further testwork will look at further potential improvements in the recoverability of tin and copper.