Abstract:Cyanide tailing is a product of the refractory gold ore roasted and leached with cyanide, which contains valuable metals such as gold, silver and iron, as well as trace cyanide. It is necessary to carry out harmless disposal and comprehensive utilization. Due to melting or recrystallization of some iron phases during roasting, some gold is wrapped by dense hematite for the second time. Hematite must be destroyed and the wrapped gold can be recycled. Based on analysis of the current research and application status of harmless disposal methods of cyanide tailings and methods of destroying hematite, and aiming to address disadvantages of individual processes of harmless disposal and iron removal of cyanide tailings, a new technology of combining the above mentioned two individual processes and photocatalytic degradation of cyanide by leachate is proposed and explored by experiment.