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Gold/Mining/Energy : Western Copper Holdings - WTC.T -- Ignore unavailable to you. Want to Upgrade?

To: Elizabeth Andrews who wrote (19)	3/25/2002 11:05:12 PM
From: Claude Cormier	Read Replies (3) \| Respond to of 754

Eliz, HMS - Heavy Media Separation, here how it was explained to me: The type of rocks at Penasquito would need to go through a mill finely crushed to allow high recoveries of the metal. As you know this is expensive process. Because of the type of rocks, they say they can have a first line crusher that will bring the rocks down to one inch size. Then this material would go through a HMS process which would eliminate between 55% and 72% of the rocks (depending on the head grade of the ore) and keep only the ore with the most valuable metals. With this process, less than half of the original ore would need to go through the fine grinding/flotation circuit thus lowering the costs and making the project economic with low metal prices. This is being done in some diamonds projects. I also found that this company is using HMS on a copper-silver project: anvil.com.au I don't know if this makes sense or is feasible. And I would much prefer to have higher metal prices.