2009•Precious MetalsRequires access

Study on Bacterial Oxidation-extraction Gold of Refractory Gold Ore

Enpu Gong

Abstract

The experiments of bacterial oxidation,cyanidation extraction gold from refractory high arsenic gold ore were carried out with bacteria HQ0211 domesticated.This kind of gold ore contains 128.5 g/t gold,16.84% arsenic,21.72% sulfur,26.62% iron.The leaching rate of cyanidation only has 29.35%.It is classed into the high arsenic refractory gold ore.The dearsenication rate of the gold ore is 96.2%,weight-loss rate is 43.9% through bacterial oxidation pretreatment.After bacterial oxidation,the gold cyanidation leaching rate of the ore increase to 92.57% from 29.35%,and results are in evidence.

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Key concepts: Gold cyanidation, Gold extraction, Gold ore, Arsenic, Leaching (pedology), Chemistry, Refractory (planetary science), Metallurgy