【摘要】 在分析现有氯化浸金体系的基础上,对氯化浸金过程进行热力学分析,得出了体系的共性规律。金的氯化浸出是一个氧化络合过程,其氧化电位取决于生成的金氯络合物的稳定常数和特定的浸出条件。在标准条件下,只要氧化剂的标准电极电位高于0.99 V,金将以三价金氯络合物的形态浸出;当氧化剂的标准电极电位高于1.12 V,金将以一价金氯络合物的形态浸出。热力学上更有利于金以三价金氯络合物的形态浸出。加大络合剂、氧化剂的浓度和/或不断降低浸出液中金氯络合物的浓度,热力学上有利于金的浸出。更多还原

【Abstract】 The gold chlorination leaching processes were analyzed thermodynamically based on the analysis of current gold chlorination leaching systems.Conclusions were drawn about the common regularities of gold chlorination leaching.The leaching of gold in chlorination systems is an oxidation-complexation process.The oxidation potential of gold is controlled by the stability constant of gold chlorocomplex and special leaching conditions.The leaching of gold in the form of chlorocomplex of Au(Ⅲ) can be performed spontaneously under standard conditions while that the standard electrode potential of oxidants is larger than 0.99 V,and when the standard electrode potential of oxidants is larger than 1.12 V,gold chlorination leaching in the form of chlorocomplex of gold(I) can be carried out.The leaching of gold in the form of chlorocomplex of gold(Ⅲ) is performed more easily in respect of thermodynamics.Increasing complexing agents and oxidants concentrations,and/or continuously decreasing the gold chlorocomplex concentration is beneficial for the leaching of gold in respect of thermodynamics also.更多还原