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投稿时间:2014-03-06 修订日期:2014-03-10
投稿时间:2014-03-06 修订日期:2014-03-10
中文摘要: 采用Na2CO3-NaOH-NaNO3熔盐体系回收废弃电路板中的有价金属,考察Na2CO3-NaOH质量比、熔炼温度、熔炼时间、碱料比等因素对有价金属转化率的影响。结果表明,较为适宜的熔盐体系组成和工艺条件为:Na2CO3-NaOH质量比5.3∶16、熔炼温度700 ℃、熔炼时间40 min、碱料比5∶1,在此条件下,锡、锌、铝、铅的转化率分别为84.55%、100%、93.71%、73.72%,铜以CuO形态富集在渣中。
中文关键词: Na2CO3-NaOH-NaNO3熔盐体系 碱性熔炼 废弃电路板 有价金属
Abstract:Valuable metals were recovered from multi-component metal powder (MMP) of waste printed circuit boards in alkaline oxide melt system of Na2CO3-NaOH-NaNO3. The effects of mass ratio of Na2CO3-NaOH, smelting temperature and time, mass ratio of alkaline medium-MMP on valuable metal extraction were investigated. The results show that composition of molten salt and optimum conditions include mass ratio of Na2CO3-NaOH of 5.3∶16, smelting temperature of 700 ℃, smelting time of 40 min, and mass ratio of alkaline medium-MMP of 5∶1. The transforming rate of tin, zinc, aluminum, and lead are 84.55%, 100%, 93.71%, and 73.72%, respectively. Copper is enriched in slag in form of CuO.
keywords: Na2CO3-NaOH-NaNO3 molten salt system alkaline smelting waste printed circuit board valuable metal
文章编号: 中图分类号:TF111 文献标志码:
基金项目:国家自然科学基金面上项目(51074190);国家自然科学基金重点项目(51234009);教育部博士点基金项目(20110162110049);科技部国际合作项目(2014DFA90520)
作者 | 单位 | |
刘旸 | 中南大学冶金与环境学院 | lyysjsyj@csu.edu.cn |
刘静欣 | 中南大学冶金与环境学院 | liujingxin1989@163.com |
秦红 | 中南大学冶金与环境学院 | qinhongcsu@csu.edu.cn |
郭学益* | 中南大学冶金与环境学院 | xyguo@csu.edu.cn |
引用文本:
刘旸,刘静欣,秦红,郭学益.Na2CO3 - NaOH - NaNO3体系低温碱性熔炼处理废弃电路板多金属粉末[J].有色金属(冶炼部分),2014(9):1-4.
Liu yang,Liu Jing-xin,Qin hong,Guo Xue-yi.Comprehensive Recovery of Valuable Metals from Waste Printed Circuit Boards by Low-temperature Alkaline Smelting in Na2CO3-NaOH-NaNO3 System[J].Nonferrous Metals (Extractive Metallurgy),2014(9):1-4.
刘旸,刘静欣,秦红,郭学益.Na2CO3 - NaOH - NaNO3体系低温碱性熔炼处理废弃电路板多金属粉末[J].有色金属(冶炼部分),2014(9):1-4.
Liu yang,Liu Jing-xin,Qin hong,Guo Xue-yi.Comprehensive Recovery of Valuable Metals from Waste Printed Circuit Boards by Low-temperature Alkaline Smelting in Na2CO3-NaOH-NaNO3 System[J].Nonferrous Metals (Extractive Metallurgy),2014(9):1-4.