某含砷金精矿提金工艺试验研究  

Experimental study on gold extraction from arsenic-bearing gold concentrate

作　　者：秦春彬 刘丹丹 郭建东 刘永胜 Qin Chunbin;Liu Dandan;Guo Jiandong;Liu Yongsheng(Yantai Gold Vocational 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7期67-70,共4页Gold

摘　　要：某含砷金精矿含金52.80 g/t、砷6.31%、硫21.50%,是典型的难处理复杂金精矿,采用直接氰化,以及氧化焙烧、两段焙烧预处理后氰化,金回收效果不理想。试验采用三级工艺,即一级还原焙烧、二级酸浸、三级氧化焙烧进行处理,并对试验条件进行了优化。结果表明:在最佳条件下,经还原焙烧—酸浸—氧化焙烧—氰化工艺处理,金浸出率达93.60%,较两段焙烧—氰化工艺提高6.80百分点,实现了资源的高值化利用,为含砷金精矿中金的高效回收提供技术依据。An arsenic-bearing gold concentrate containing 52.80 g/t gold,6.31%arsenic and 21.50%sulfur is a typical refractory complex gold concentrate.The recovery of gold was not satisfactory by direct cyanidation and cyanidation after oxidation roasting and two-stage roasting pretreatment.Three-stage process(one-stage reduction roasting,two-stage acid leaching and three-stage oxidation roasting)was used in the experiment,and the experimental conditions were optimized.The results show that under optimal conditions,the gold leaching rate can be 93.60%after reduction roasting-acid leaching-oxidation roasting-cyanidation treatment,6.80 percentage points higher than that by traditional two-stage roasting-cyanidation process,realizing the high value utilization of resources,providing technical basis for highly efficient recovery of arsenic-bearing gold concentrate.

关 键 词：含砷金精矿 还原焙烧 酸浸 氧化焙烧 氰化 

分 类 号：TD953[矿业工程—选矿]