硫脲法浸出废弃电脑线路板中金的研究  

Study on gold leaching from discarded computer circuit boards by thiourea process

作　　者：黄祥浩 柯昌美[1] 杨金堂 陈梅[1] 柯海波 于锦昭 Huang Xianghao;Ke Changmei;Yang Jintang;Chen Mei;Ke Haibo;Yu Jinzhao(College of Chemical Engineering and Technology,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学化学与化工学院

出　　处：《无机盐工业》2019年第6期62-64,共3页Inorganic Chemicals Industry

基　　金：湖北省技术创新专项(重大项目,项目编号:2017ACA180)

摘　　要：废弃电脑线路板是一种典型的电子废弃物,其中含有丰富的贵金属资源,而金的回收是废弃电脑线路板资源化研究的热点。研究了用硫脲浸出废弃电脑线路板中的金,考察了硫脲质量浓度、反应时间、反应温度、三价铁离子质量分数、溶液pH对金浸出率的影响。结果表明,在硫脲质量浓度为12g/L、反应时间为60min、反应温度为30℃、三价铁离子质量分数为0.45%、溶液pH为1.5条件下,金的浸出率达到90.93%。硫脲法浸金因具有浸出速率快、浸出时无毒、对环境污染小、试剂易再生、干扰离子少等优点而具有广泛的应用前景。Discarded computer circuit boards is a typical electronic waste,which is rich in precious metal resources,and gold recycling is a hot spot in the research of waste computer circuit board resources.The thiourea was used to leaching gold from discarded computer boards,and the effects of thiourea mass concentration,reaction time,reaction temperature,Fe^3+ mass fracion and pH on gold leaching rate were investigated.The results showed that when the thioureamass concentration was 12 g/L, the reaction time was 60 min,the reaction temperature was 30 ℃,the Fe^3+ concentration was 0.45% and the pH was 1.5,the gold leaching rate reached 90.93%. The thiourea method has a wide application prospect because of its high leaching rate,non-toxicity during leaching,low environmental pollution,easy regeneration of reagents,and small interference ions.

关 键 词：废弃电脑线路板 硫脲 金 浸出 

分 类 号：X781[环境科学与工程—环境工程]