A high-voltage pulsed discharge (HVPD) pretreatment was used to strengthen the leaching effect of Carlin-type gold ore containing arsenic. Optimal results of the pretreatment experiments were obtained at the following operating conditions: a spherical gap spacing of 20 mm, pulse number of 100, and voltage of 30 kV. The leaching rate of gold was increased by 15.65% via the HVPD pretreatment. The mass fraction of −0.5+0.35 mm and −0.35+0.1 mm was increased by 10.97% and 6.83% compared to the untreated samples, respectively, and the Au grade of −0.1 mm was increased by 22.84%. However, the superiority of the HVPD pretreatment would be weakened by prolonged grinding time. Scanning electron microscopy results indicated that the pretreated products presented as a melting state and then condensation, accompanying by some pore formation. More micro-cracks were generated at the interface of the ore and the original crack were expended via pulsed discharge pretreatment, with the contact area between the leaching reagent and ore increased, the leaching reaction rate enhanced and the leaching effect strengthened.

高压脉冲放电（HVPD）预处理用于增强含砷的卡林型金矿石的浸出效果。在以下操作条件下可获得预处理实验的最佳结果：球形间隙间距为20 mm，脉冲数为100，电压为30 kV。通过HVPD预处理，金的浸出率提高了15.65％。与未处理的样品相比，-0.5 + 0.35 mm和-0.35 + 0.1 mm的质量分数分别增加了10.97％和6.83％，-0.1 mm的Au等级增加了22.84％。但是，延长研磨时间会削弱HVPD预处理的优越性。扫描电子显微镜结果表明，经预处理的产物呈现出熔融态，然后凝结，同时形成一些孔。