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%.

• 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%25左右。