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Gold/Mining/Energy : Canadian Diamond Play Cafi -- Ignore unavailable to you. Want to Upgrade?

To: james flannigan who wrote (4855)	11/27/2006 11:41:42 AM
From: WillP	Read Replies (1) \| Respond to of 16206

James: It's not the grade of the kimberlite that would improve, but the grade of the material sent to the plant. Drilling, blasting and otherwise extracting, transporting and primary crushing the kimberlite leaves you with a wide variety of hunks of rock, ranging from the maximum crush size, down to tiny grains of sand. Washing the material over a minimum cut-off screen would rinse away all the mud and tiny fragments, leaving only what is large enough to contain diamonds. That would be a really cheap method of producing concentrate. It's similar to the reverse-circulation drilling process. In the Fort a la Corne region, they typically retain just half of the extracted kimberlite. All the waste rock that is removed would not have to be transported to the processing plant, or go through the plant. Regards, WillP