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废旧印刷线路板两步浸出有价金属

Keywords: 废旧印刷线路板,两步浸出,贱金属,

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Abstract:

为回收废旧印刷线路板中的有价金属,采用两步浸出的方法对其进行处理.先用双氧水-硫酸浸出贱金属,再用王水浸出贱金属浸出渣中的金.10g废旧印刷线路板贱金属最佳浸出条件为双氧水20mL,固液比1颐5,硫酸浓度5mol/L,反应温度60益,反应时间90min,原料溶损率达90.0%;金最佳浸出条件为反应温度40益,反应时间30min,浸出率达97.5%.研究证明两步浸出法能有效处理废旧印刷线路板,金溶出过程受扩散控制.

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