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Gold Ore Carbonaceous

Gold extraction of 90 pct was achieved by cyanidation of carbonaceous ore that had been pretreated with 20 lb per ton sodium hypochlorite at 50u00B0 C for 4 hours. Similarly, pretreatment of the ore pulp with 35 lb chlorine per ton at 24u00B0 to 30u00B0 C and 15 hours reaction time resulted in 89-pct gold extraction by subsequent cyaanidation.

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