Wellgreen Project Preliminary Economic Assessment ... - OTCIQ.com

Trade-off studies should be completed on the concentrate loadout strategy. The
current design is a storage hopper which will deliver the concentrate into 50 t trucks
driving under a load-out conveyor. Other load out options should be explored, such
as a concentrate building where the concentrate is stored on a cement pad and
handled with a loader onto a conveyor to load the trucks, as well as bagging or
drumming of the concentrate.
A series of additional trade-off studies should be undertaken to determine if the
concentrate can be further beneficiated economically. A number of process options
can be considered including:
• smelting (in particular flash smelting)
• converting
• slow cooling of converter matte to produce separate high grade PGM and
base metal concentrates
• toll treatment of high grade concentrates
• hydrometallurgical treatment of both concentrates and mattes including acid
leaching, base and precious metal refining, Platsol, HydroCopper, and
related processes.
The estimated cost for this work is approximately US$400,000.
26.4 I NFRASTRUCTURE
The TMFs and the process plant area locations are preliminary and require further
work to assess final locations. Costing has been based upon selection of the
preliminary locations.
Power supply for the site needs to be investigated and explored for the next level
study.
Tetra Tech recommends the following for the next level of the study:
• TMF location study by a team including geotechnical, mining,
metallurgical/process, environmental, civil, mechanical disciplines
• process plant area location study for optimizing the capital and operating
costs
• overall site detail topographical survey
The total cost of the above work is US$1,250,000.
Prophecy Platinum Corp. 26-6 1193460500-REP-R0001-02
Wellgreen Project Preliminary Economic Assessment,
Yukon, Canada