At present, about 1/3 of the world's gold resources belong to refractory gold ores. The use of bacterial oxidation to treat refractory gold ores or concentrates is economical, effective and safe, and is conducive to environmental protection. Therefore, the bacterial oxidation method has great application potential.

This method is suitable for the treatment of gold ores such as pyrite and arsenopyrite, which are difficult to achieve by direct chemical treatment. More attractive for the treatment of gold concentrates, bacterial oxidation is also suitable for materials with high sulfide content and low treatment basins. At present, 20% of the world's refractory gold ore processing plants have chosen the biological oxidation method to produce. 0. The bacterial oxidation method is used to treat the refractory arsenic-bearing gold ore, and the progress has been rapid in recent years. It has become the fastest growing technology for refractory gold ore pretreatment.