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Gold/Mining/Energy : Global Platinum & Gold (GPGI)

GPGI 24.46

+6.1%

Feb 6 9:30 AM EST

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To: Bob Walsh who wrote (5216)	3/3/1998 9:01:00 PM
From: Zeev Hed	Read Replies (1) of 14226

Bob: I wonder if the company would be willing to clarify the standard process currently in "production". It used to be that GPGI was working on two approaches, smelting followed by electrowinning resulting in a PGM rich sludge, and the second process was the "catalyst" induced precipitation of (something) from a leached ore solution. We are often talking of a Dore bar, but we had quite different versions of that Dore bar. The earliest I remember was when the sludge (or at least part of it) was reduced at very high temperature (vacuum furnace). I think that the current "dore bar" is actually the precipitate from Twifford's leachates "smelted" into a copper collector. Is this correct? In earlier reports, the precipitate for Twifford's process was about 1/6 the volume of the original ore, has this improved since (and thus we have a higher concentration of goodies in the precipitate). Last is the electrowinning process (for which I presume the new 40 tanks are being installed) applied on the old smelted copper or is it applied on the smelted precipitates. Thanks in advance. Zeev

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