Research on the gold ore leaching in iodine-iodide system

Iodine-iodide leaching gold ore is a promising method alternative to cyanide leaching. In this paper, Eh-pH diagram of Au-I--I-2-H2O system was established through calculating the equilibrium potentials of the main chemical reactions based on the thermodynamic data of the actual iodide leaching of gold system. Gold ore leaching experiments in iodine-iodide system under different influence factors were carried out to verify the effectiveness of the Eh-pH diagram. The results indicated the diagram of Eh-pH can effectively guide the actual gold ore leaching in iodine-iodide system.