无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2019, Vol. 51 ›› Issue (6): 62-64.

• 环境·健康·安全 • 上一篇    下一篇

硫脲法浸出废弃电脑线路板中金的研究

黄祥浩,柯昌美(),杨金堂,陈梅,柯海波,于锦昭   

  1. 武汉科技大学化学与化工学院,湖北武汉 430081
  • 收稿日期:2019-01-23 出版日期:2019-06-10 发布日期:2020-05-12
  • 通讯作者: 柯昌美
  • 作者简介:黄祥浩(1993— ),男,硕士研究生,研究方向为电子废弃物回收处理;E-mail:798057803@qq.com。
  • 基金资助:
    湖北省技术创新专项(重大项目)(2017ACA180)

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

Huang Xianghao,Ke Changmei(),Yang Jintang,Chen Mei,Ke Haibo,Yu Jinzhao   

  1. College of Chemical Engineering and Technology,Wuhan University of Science and Technology,Wuhan 430081,China
  • Received:2019-01-23 Online:2019-06-10 Published:2020-05-12
  • Contact: Ke Changmei

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12 g/L、反应时间为60 min、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。

关键词: 废弃电脑线路板, 硫脲, 金, 浸出

Abstract:

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 fra-cion 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.

Key words: discarded circuit board, thiourea, gold, leaching

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