| Roasted cyanide tailings (RCTs) are the hazardous solid wastes discharged in the gold production. Due to a large amount of remained valuable elements such as gold, silver and iron, RCTs are considered as the recyclable secondary resources. The research progress in the recycling of gold, silver and iron from the RCTs around the world has been systematically summarized in the present paper. The recycling techniques include magnetic roasting, thiourea leaching, chloridizing leaching, high-temperature chloridizing roasting, acid leaching followed by cyanidation leaching, direct reduction roasting and ultra-fine grinding. Both the advantages and disadvantages of the reported processes were discussed in the comprehensive utilization of RCTs. The trend for recycling, reduction and detoxification of RCTs was proposed. |
