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Gold/Mining/Energy : Manhattan Minerals (MAN.T)

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To: Claude Cormier who wrote (2611)	6/26/1999 6:14:00 PM
From: Jeff Dickson	Read Replies (2) of 4504

Claude, I found a little mention on the Cominco site: "Cominco...recently invented, patented, and is currently marketing a new environmentally friendly process for the hydrometallurgical extraction of copper from sulphide concentrates based on pressure leaching, solvent-extraction, and electrowinning. A demonstration plant capable of producing up to 500 tonnes per year of refined copper ran successfully during 1997. A gold recovery plant will be comissioned in 1998 as the process is also expected to recover gold from copper concentrate." That sounds like what I must have read in 97. Probably haven't heard much more about it because of the copper prices. Don't usually see the word "solvent" and "environmentally friendly" in the same sentence. When you mentioned Red Dog it reminded me about that. Nice little pdf on Red Dog on the site, no mention of metallurgy though. To me, 20 microns is huge... but different context. -jeff

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