关键词: 氰化尾渣, 浸出, 两段焙烧, 混合添加剂, 助浸剂

Abstract: The complex exploitation and utilization of gold mine in China was introduced and the disposal status quo of cyanide tailing from arsenical-copper gold concentrate preparation by flotation was presented. The factors that influenced the leach of gold and silver and the leaching mechanism were analyzed. The experiments showed that the leach rates of gold and silver from the cyanide tailings were increased to 82.9% and 61.54% respectively by adding the mixed additive, adopting two-stage roasting and grinding with the addition of leaching aid agent before being treated with cyanide. Meanwhile, the grades of gold and silver were decreased to 0.55 g/t and 30 g/t separately.

Key words: Cyanide tailing, Leaching, Two-stage roasting, Mixed additive, Leaching agent