载金炭解吸电解工艺优化及生产实践  

Optimization of gold-loaded carbon desorption electrolysis process and its production practice

作　　者：赵鲁国 Zhao Luguo(Shandong Zhaojin Gold&Silver Refinery Co.,Ltd.)

机构地区：[1]山东招金金银精炼有限公司

出　　处：《黄金》2024年第5期96-98,共3页Gold

摘　　要：针对金精矿氰化炭浆提金过程中活性炭吸附残留浮选有机药剂及富集其他杂质元素,导致载金炭解吸电解回收金效果差、贫炭金品位高等问题,开展了载金炭解吸电解工艺优化,并进行了生产实践。结果表明:通过强化源头水洗载金炭,补加氢氧化钠解吸液由2.5%降低到1.25%,解吸流量由6 m^(3)/h降低到4.5 m^(3)/h,电压由2.0 V提高到2.5 V,电流由2 400 A提高到2 900 A,在相同解吸电解时间下贫炭金品位由200 g/t以上降至50 g/t以下,金解吸率由74.8%提升至96.7%,电解贫液金质量浓度由2.0~4.0 g/m^(3)降至1.0 g/m^(3)以下,极大改善了金精矿氰化炭浆提金工艺载金炭解吸电解效果,提高了金回收率。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 m^(3)/h to 4.5 m^(3)/h,voltage increased from 2.0 V to 2.5 V,current increased from 2400 A to 2900 A.Under the same desorption 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/m^(3) to below 1.0 g/m^(3),greatly improving the desorption electrolysis effect of gold-loaded carbon in gold concentrate cyanidation-CIP gold extraction process and enhancing gold recovery rate.

关 键 词：载金炭 解吸电解 金精矿 氰化炭浆提金 解吸率 

分 类 号：TD953[矿业工程—选矿] TF813[冶金工程—有色金属冶金]