Recently, cyanide leaching has been progressively inhibited by environmental pollution and long processes. In this study, the effect of leaching conditions on the extraction of gold was investigated with the new environmentally friendly gold lixiviant “Jinchan” (JC) as a substitute for cyanide. The extraction of gold is 90.8% under the optimum parameters as the liquid-solid ratio of 3:1, the concentration of lixiviant JC of 1.0 g/L, the dosage of activated carbon of 45 g/L, the stirring rate of 300 rpm, the temperature of 50 °C, and the reaction time of 5 h. Comprehensive analysis of the gold concentrate and the leach residue was conducted, which revealed that the distribution of exposed gold decreased the most from 75.9% to 18.3%, while other phases of gold had a low extraction caused by the encapsulation. Pretreatment by ultrasound or ultrafine grinding was adopted to liberate the encapsulated gold, and the extractions of gold increased to 91.8% and 96.9%, respectively. Finally, cyclic leaching experiments were carried out, which demonstrated that cycles of activated carbon and leachate hardly influence the extraction of gold within a certain range. Overall, this study suggests that JC has potential for industrial promotion as substitutes for cyanide and provides references for the application of JC.

最近，氰化物浸出已逐渐受到环境污染和长过程的抑制。本研究采用新型环保浸金剂“金蟾”（JC）替代氰化物，研究了浸出条件对金提取的影响。液固比3:1、浸出剂JC浓度1.0 g/L、活性炭用量45 g/L、搅拌速度300 rpm时，金的提取率为90.8% ，温度为 50 °C，反应时间为 5 h。对金精矿和浸出残渣进行综合分析，发现裸金的分布下降幅度最大，从75.9%降至18.3%，而其他相金的提取率较低。采用超声或超细研磨预处理，使包覆金游离，金的提取率分别提高到91.8%和96.9%。最后进行了循环浸出实验，表明活性炭和浸出液的循环在一定范围内对金的提取几乎没有影响。总体而言，本研究表明JC作为氰化物的替代品具有产业推广潜力，并为JC的应用提供参考。