中国科技核心期刊
美国化学文摘社(CAS)数据库
美国EBSCO学术数据库
日本科学技术振兴机构数据库(JST)
针对某复杂高银铜解吸金泥,进行了FeCl3酸浸除杂—熔铸银阳极板—银电解分金银的联合流程研究。在FeCl3用量n(Fe3+)∶n(Cu)为2.8、HCl浓度2.5 mol/L、液固比4∶1、反应温度80 ℃、反应时间2.5 h的最优条件下,金泥Cu、Pb、Fe浸出率分别为97.25 %、98.24 %和99.67 %,Au、Ag浸出率仅为0.027 %和0.441 %,达到了有效分离贵贱金属的目的。除杂后的金泥熔铸成银阳极板,其主要金属质量分数为Au 21.47 %、Ag 78.59 %、Cu 0.89 %、Pb 0.04 %,易于通过银电解工艺分别提纯得到1号银和1号金。该工艺是一种较为理想的高银铜解吸金泥处理工艺。
For complex desorption gold mud with high silver and copper content,a combined process of FeCl3 acid leaching-silver anode casting-silver electrolysis for gold and silver separation was studied.The optimum conditions were obtained through the experiment,that the dosage of FeCl3 expressed as n(Fe3+)/n(Cu) is 2.8,HCl concentration is 2.5 mol/L,liquid-solid ratio is 4∶1,the reaction temperature is 80 ℃,the reaction time is 2.5 h.Under these conditions,the leaching rates of Cu,Pb and Fe were 97.25 %,98.24 % and 99.67 % respectively,and the leaching rates of Au and Ag were only 0.027 % and 0.441 % respectively.The purpose of separating noble and base metals effectively was achieved.The gold mud was cast into silver anode plate after removing impurities,and the main metal mass fraction were Au 21.47 %,Ag 78.59 %,Cu 0.89 % and Pb 0.04 %.This anode plate was easily purified by silver electrolysis to get Ag-Ⅰand Au-Ⅰ.It is an ideal process to treat desorption gold mud with high silver and copper content.