某难处理金精矿焙烧—氰化提金工艺试验研究  

Extraction of Gold from Refractory Gold Concentrate by Roasting-Cyanide Leaching

作　　者：吴智[1] 黄中省[1] 臧宏[1] 衷水平[1,2] 伍赠玲[1,2] 

机构地区：[1]紫金矿业集团股份有限公司低品位难处理黄金资源综合利用国家重点实验室,福建上杭364200 [2]福州大学紫金矿业学院,福建福州350116

出　　处：《黄金科学技术》2014年第6期77-81,共5页Gold Science and Technology

基　　金：国家自然科学基金项目"载金黄铁矿化学溶解特性与生物促进机制"(编号:51474075);福建省杰出青年基金项目"低品位难处理金矿生物堆浸基础理论研究"(编号:2011J0103)联合资助

摘　　要：针对某难处理金精矿,采用焙烧—氰化提金工艺。试验得到的最佳条件:金精矿粒度为-0.043 mm占52.85%,一段焙烧温度为450℃,焙烧时间为1 h(炉门关闭),二段焙烧温度为700℃(炉门稍开),焙烧时间为0.5 h;初始Na CN浓度为0.5‰,L/S=4,氰化时间为24 h。在此条件下,硫、砷的脱除率分别为99.99%和52.56%,金的浸出率为88.92%。Focusing on the refractory gold concentrate in northwest region,the technology of roasting-cyanidation was studied and the optimized condition was obtained.Experimentation results show that the removal rate of S and As are 99.99% and 52.56%respectively,and the gold leaching rate is above 88.92%under these conditions：-0.043 mm was about 52.85%,the one stage roasting with the temperature of 450℃and time of 1 hour,two stages roasting with the temperature of 700℃and time of 0.5 hour.The best cyanide-leaching parameters are initial densities of sodium cyanide is 0.5‰,the liquid-solid ratio is 4 and time of 24 hours.

关 键 词：难处理金精矿 焙烧氧化 提金工艺 

分 类 号：TF831[冶金工程—有色金属冶金]