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Gold/Mining/Energy : A New Age In Gold Refining

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To: Bill Jackson who wrote (466)	1/17/1998 8:55:00 PM
From: Michael J. Wendell	Read Replies (2) of 672

Bill, I am proud that when I misspell a word, the word still has a bang to it. By the way, if you use a media of 14 pH sodium hydroxide solution in a ball mill in a fine grind circuit, a lot of the silicates will turn to absolute colloids. A number of minerals that are not soluable in acids or lower pH solutions will dissolve and in some cases the gold will also go into in that solution as colloidal, I suspect. Iron is insoluble in alkaline solutions, but at the higher pH, especially with salt, it will go into the solution too. I was once using the methods with hot solution to break down silicates, afterwards the gold was gone from some of the tests. We found it had gone into the alkali pre-treatment and grind solution. I don't think it was truly dissolved. The colloid light test showed intense colloids were in the fluids, but I don't know what form the gold was in. It would pass through a filter paper with the filtrate. mike

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