Here's the meat:
Initial results for the primary roasting & tank leach test work demonstrated recoveries up to 95% for cobalt
and 98% for copper. This is a significant improvement from the 2018 autoclave leaching metallurgy test
results for the sulphide ore compared to the historical recoveries of 72.6% Co and 74.1% Cu.
That's a great result. No reason to believe the rest of the test work will be any worse. That's a ~30% improvement over the autoclave method!
Ann: Celsius improves recoveries of Cobalt and Copper at Opuwo, page-3
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