Summary

Metallurgical testwork indicates that high recoveries of cobalt can be achieved through low temperature atmospheric leaching. A conceptual flowsheet based on a simple agitated leach has been developed that has the potential to recover approximately 80% of the cobalt and over 20% of the nickel with very low acid consumption of 25-50kg/tonne of ore over a leach time of 4 to 5 hours. An alternative high capital cost flowsheet is capable of recovering over 90% of the cobalt and almost 80% of the nickel.

The Mt Thirsty Cobalt Project is envisaged to be an open pit mine with onā€site treatment via a hydrometallurgical processing plant. Ore will be mined by simple scrape and dig mining methods. Mined ore will be trucked to a processing plant located adjacent to the open pit. An extremely modest stripping ratio of 1:1 is expected as the resource starts from near surface.

Figure 1: Location of Mt Thirsty Cobalt Project and regional geology
Figure 1: Location of Mt Thirsty Cobalt Project and regional geology