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January 2000
Volume 52    Issue 1

Using diagnostic process analysis to improve cash flow at Newmont's Carlin Mill #4

Mining Engineering, 2000, Vol. 52, No. 1, pp. 18-23
Brittan, M.; Arthur, B.


ABSTRACT:
Newmont Gold’s Mill #4 at Carlin, NV, treats mildly refractory gold ore in a conventional grinding/carbon-in-leach (CIL) circuit. The mill processes ores from various mining operations in the Carlin complex. No preoxidation is employed ahead of the CIL circuit. As a consequence, gold recovery is generally lower than would be expected from oxide ore. The refractory behavior is related to gold occlusion in sulfides and silicates and to preg-robbing by organic carbon, which is typical of ores from the Carlin, NV, area. Gold recovery in the mill is, therefore, subject to variations in these components of the different ores blended as mill feed.


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