Aug 09, 2013 The porphyry copper–gold ore used in this study was obtained from a mine in Asia. Approximately 40 kg of ball mill feed (crushed to −2 mm) was taken. The ore was homogenised and split into 2 kg representative sub-samples. During the blending and splitting process, a 100 g sub-sample was taken for feed head grade analysis.ball mill quartz grinding technical problem.
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Get Quote OnlineA sample of gold ore like the one used in example 1 was pulverized in a ball mill at about 60 to 70% solids for 1.25 hours at 72 rpm to pass a 400 mesh sieve. The ore passing the 400 mesh sieve was leached with 1000 ppm cyanide (1.73 g KCN/liter) and in 0.1N NaOH at 40% solids. The ore-cyanide pulp was mixed for 72 hours at room temperature.
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