何家岩原生金矿石细菌预氧化提金工艺试验研究

Experimental Research on the Technology for Bacterial Pre-oxidation and Cyanide Leaching of Gold in Hejiayan Primary Gold Ores

何家岩原生金矿石中,金及金的载体矿物粒度微细,采用常规氰化浸出,金浸出率仅23%左右。对浮选金精矿采用细菌预氧化—氰化浸出工艺,金浸出率可达到92.73%。因此,采用浮选—浮选金精矿细菌预氧化—氰化浸出是处理该矿石较为适宜的工艺。

In Hejiayan primary gold ores,the particle size of gold and gold carrier minerals is microfine. If the conventional cyanide leaching is adopted, the leaching rate of gold is about 23%. However, when the technology of bacterial pre - oxidation and cyanide leaching for flotation concentrate of gold is used, the leaching rate of 92.73 % is reached. The experimental results proved that the bacterial pre-oxidation and cyanide leaching technology is suitable for processing of Hejiayan gole ores.