Thermodynamic Characteristics of Cyanide Leaching Gold and Silver (1)
From a thermodynamic point of view, the driving force for the precipitation of gold and silver from the CN-containing solution can be quantitatively expressed by the reduction potential. which is Therefore, strong oxidants are required. Its oxidizing ability depends not only on the redox potential but also on the pH and ion concentration and temperature. It is easier to understand how their behavior and relationship in the redox system are represented by the oxidation-reduction potential E-pH diagram. Fig. 1 is an E-pH diagram of Au, Ag - CN--H 2 O system at 25 °C. FIG, Au (CN) 2 - / theoretical curves ①Au couple of years is a Bode Au 1903 Rand assay (CN) 2 - stability constant β = 2 × 10 38, Au + standard reduction potential E Ө = 1.692V is calculated as E=1.692-0.0591 lgβ=-0.571V. [next] Square Ring Seals,Square Gasket Ring,Square Rubber Ring,Square Cut Oring Ningbo Robon Sealing CO.,LTD , https://www.zjrboorb.com