H_(2)SO_(4)分解铁-FeCl_(3)浸出焙烧金精矿中金  

Extraction of gold from roasted gold concentrate by decomposing iron with H_(2)SO_(4)combined with leaching with FeCl_(3)

作　　者：师兆忠[1,2,3] 王丽[1,2,3] 周华[1,2,4] 王明瑞[1,2,3] 韩艳霞[3] 刘进[1,2,4] 孙瑞敏 周永恒[1,2,4] SHI Zhaozhong;WANG Li;ZHOU Hua;WANG Mingrui;HAN Yanxia;LIU Jin;SUI Ruimin;ZHOU Yongheng(Henan Engineering Research Center of Advanced Materials and Green Process,Kaifeng University,Kaifeng 475004,Henan,China;Henan Provincial Key Laboratory for Advanced Silicon Carbide MaterialsKaifeng University,Kaifeng 475004,Henan,China;School of Material and Chemical Engineering,Kaifeng University,Kaifeng 475004,Henan,China;Research Center of Functional Materials,Kaifeng University,Kaifeng 475004,Henan,China)

机构地区：[1]开封大学,河南省先进材料与绿色过程工程技术研究中心,河南开封475000 [2]开封大学,河南省先进碳化硅材料重点实验室,河南开封475000 [3]开封大学材料与化学工程学院,河南开封475000 [4]开封大学功能材料研究中心,河南开封475000

出　　处：《贵金属》2023年第3期40-45,共6页Precious Metals

基　　金：河南省高校重点科研项目资助计划项目(21B610008);河南省科技攻关计划项目(No.162102210342);开封市科技发展计划项目(2103002)。

摘　　要：采用硫酸分解焙烧金精矿,金从黄铁矿中解离的同时金得到了富集,可采用氯化铁溶液非氰浸出金。研究了硫酸浓度及过量系数、分解温度对铁分解率的影响,优化工艺条件为,焙烧温度180℃,反应时间90 min,硫酸过量系数1.2,在此条件下,铁分解率为92.14%,金含量从原来的51.7 g/t提高到106.1 g/t;研究了反应温度、液固比对氯化铁溶液浸出硫酸浸出渣中金的影响,优化浸出条件为,液固比1.5,80℃浸出90 min,在此条件下,金浸出率96.8%。Cyanide-free extraction of gold is a key technology for the sustainable development of gold smelting industry.Decomposing the roasted gold concentrate with sulfuric acid can dissociate gold from pyrite,realizing the enrichment of gold which facilitates the subsequent leaching process of gold with ferric chloride solution.The effects of sulfuric acid concentration,excess coefficient and temperature on the decomposition rate of iron were studied.The optimum decomposition temperature and time,and the optimum excess coefficient of sulfuric acid were 180℃,90 min and 1.2,respectively.Under these conditions,the decomposition rate of Fe was 92.14%and the content of gold increased from 51.67 to 106.1 g/t.For the leaching process,the optimum temperature and time,the liquid-solid ratio were 80℃,90 min and 1.5,respectively.Under these conditions,the gold leaching rate was 96.8%.

关 键 词：焙烧金精矿 硫酸 氯化铁 非氰浸金 

分 类 号：TF831[冶金工程—有色金属冶金]