某含铜砷金精矿综合回收金银铜焙烧试验研究  

Experimental study of roasting cyanidation for comprehensive recovery of gold,silver and copper from a gold concentrate containing copper and arsenic

作　　者：秦春彬 刘丹丹 郭建东 刘永胜 Qin Chunbin;Liu Dandan;Guo Jiandong;Liu Yongsheng(Yantai Gold College;Shandong Guoda Gold Co.,Ltd.)

机构地区：[1]烟台黄金职业学院 [2]山东国大黄金股份有限公司

出　　处：《黄金》2022年第5期77-82,共6页Gold

摘　　要：某含铜砷金精矿采用硫酸化焙烧生产工艺进行处理,酸浸铜浸出率仅为86.03%,金、银氰化浸出率分别为92.00%、53.00%,有价金属金、银、铜回收效果均不理想。针对该含铜砷金精矿性质,采用三级工艺,即一级还原焙烧+硫酸化焙烧、二级酸浸浸铜、三级氰化浸出工艺进行处理,并优化了试验条件。结果表明:在最佳条件下,该含铜砷金精矿添加氢氧化钠10.0 kg/t,经过600℃、1.0 h的还原焙烧,焙砂再添加8.0%硫铁矿进行650℃、2.0 h的硫酸化焙烧,焙砂经酸浸浸铜,铜浸出率达到95.35%;酸浸渣经氰化浸出,金、银浸出率分别为96.13%、75.39%,指标较好,实现了含铜砷金精矿的有效回收利用。A gold concentrate containing copper and arsenic was treated by sulphation roasting.The acid leaching rate of copper was only 86.03%,and the cyanide leaching rates of gold and silver were 92.00% and 53.00% respectively.The recovery of valuable metals,silver and copper,was not satisfactory.The three-stage process,that is first-stage reduction roasting+sulfuric acid roasting,second-stage acid leaching of copper and third-stage cyanide leaching of gold,was adopted in the experiment,and the experimental conditions were optimized.The results show that under the optimal conditions,the gold concentrate containing copper and arsenic with the addition of sodium hydroxide 10.0 kg/t is through reduction roasting at 600℃ for 1.0 h,the roasting slag with the addition of 8.0% pyrite is through sulphation roasting at 650℃ for 2.0 h,and the leaching rate of copper after acid leaching of roasting slag is up to 95.35%;the acid leaching slag is subject to cyanide leaching of gold,and the leaching rates of gold and silver are as good as 96.13% and 75.39% respectively,realizing effective recovery and utilization of gold concentrate containing copper and arsenic.

关 键 词：含铜砷金精矿 硫酸化焙烧 还原焙烧 硫铁矿 酸浸 氰化 

分 类 号：TF831[冶金工程—有色金属冶金]