Optimization of gold-loaded carbon desorption electrolysis process and its production practice
In the process of cyanidation-CIP gold extraction from gold concentrate,activated carbon adsorbs residual flotation organic reagents and enriches other impurity elements,leading to poor gold recovery efficiency and high gold grade in lean carbon,among other issues,in gold-loaded carbon desorption electrolysis process.Therefore,optimization of the gold-loaded carbon desorption electrolysis process was conducted,followed by production practices.Results showed that by enhancing the initial water washing of gold-loaded carbon,the addition of supplementing sodium hydroxide desorption solution decreased from 2.5%to 1.25%,desorption flow rate decreased from 6 m3/h to 4.5 m3/h,voltage increased from 2.0 V to 2.5 V,current increased from 2 400 A to 2 900 A.Under the same desorp-tion time,the gold grade in lean carbon decreased from above 200 g/t to below 50 g/t,and gold desorption rate increased from 74.8%to 96.7%.The concentration of gold in the electrolytic lean solution decreased from 2.0-4.0 g/m3 to below 1.0 g/m3,greatly improving the desorption electrolysis effect of gold-loaded carbon in gold concen-trate cyanidation-CIP gold extraction process and enhancing gold recovery rate.
万方数据
维普
