金铜精矿中性催化加压浸出预处理工艺

针对金铜精矿采用中性催化加压预处理工艺，经试验，在温度180 ℃、氧分压1.8 MPa、催化剂0.14 mol/L的基本条件下，Cu浸出率为99.4%，浸液中残留∑Fe质量浓度仅为3.52 g/L，对后续回收Cu的精炼工艺非常有利。氧化渣以氯化浸金工艺浸出Au、Ag，浸出率分别为98.2%、90.3%，有价元素回收率高，工艺简单，环境效益好。

Pretreatment Process Technology of Neutral Catalytic Pressure Leaching in Gold and Copper Concentrates

The pretreatment method based on catalytic pressure in neutral conditions was used for leaching gold and copper concentrates. The results suggested that 99.4% of Cu could be leached out from gold and copper concentrates when temperature was 180℃, partial pressure of oxygen was 1.8 MPa and amount of catalyst was 0.14 mol/L. The total of Fe was only 3.52 g/L in leachate, which was beneficial to recovery of Cu in the follow-up process. In the residue, 98.2% of Au and 90.3% of Ag could be leached out by chloride leaching gold process. The pretreatment process was straightforward and the environmental benefits.