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Supergravity Separation for Cu Recovery and Precious Metal Concentration from Waste Printed Circuit Boards
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2017-11-14 00:00:00 , DOI: 10.1021/acssuschemeng.7b02204 Long Meng 1 , Yiwei Zhong 1 , Zhe Wang 1 , Kuiyuan Chen 1 , Xinle Qiu 1 , Huijing Cheng 1 , Zhancheng Guo 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2017-11-14 00:00:00 , DOI: 10.1021/acssuschemeng.7b02204 Long Meng 1 , Yiwei Zhong 1 , Zhe Wang 1 , Kuiyuan Chen 1 , Xinle Qiu 1 , Huijing Cheng 1 , Zhancheng Guo 1
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Printed circuit boards (PCBs) contain both valuable metals and hazardous materials, thereby rendering them attractive secondary sources of metals, but also environmental contaminants. Thus, we herein report the use of supergravity separation for the recovery of copper (Cu) and the concentration of precious metals present in waste PCBs. At an optimized temperature of 1300 °C, a gravity coefficient of 1000, and a separation time of 5 min, the total recoveries of Cu, Zn, Pb, and Sn over the whole separation process were 97.80%, 95.59%, 98.29%, and 97.69%, respectively. Compared with the amounts of precious metals present in the original PCBs, the contents of Ag, Au, and Pd in the Cu alloy increased by 5.16, 2, and 1.85 times, respectively, while those in the final residues increased by 2.92, 1.59, and 1.54 times, respectively. Upon combination of the appropriate hydrometallurgical process and supergravity separation of metals or alloys, this clean and efficient process provides a new way to recycle valuable metals and effectively prevent environmental pollution from PCBs.
中文翻译：
利用超重力分离技术从废印刷电路板中回收铜并富集贵金属
印刷电路板（PCB）包含贵重金属和有害材料，因此使它们成为有吸引力的次要金属来源，同时也包含环境污染物。因此，我们在此报告了使用超重力分离技术回收铜（Cu）和废PCB中存在的贵金属浓度的方法。在最佳温度1300°C，重力系数1000和分离时间5 min的条件下，整个分离过程中Cu，Zn，Pb和Sn的总回收率分别为97.80％，95.59％，98.29％，和97.69％。与原始PCB中存在的贵金属相比，Cu合金中Ag，Au和Pd的含量分别增加了5.16、2和1.85倍，而最终残留物中的含量分别增加了2.92、1.59，和1.54倍。
更新日期：2017-11-14
中文翻译：
利用超重力分离技术从废印刷电路板中回收铜并富集贵金属
印刷电路板（PCB）包含贵重金属和有害材料，因此使它们成为有吸引力的次要金属来源，同时也包含环境污染物。因此，我们在此报告了使用超重力分离技术回收铜（Cu）和废PCB中存在的贵金属浓度的方法。在最佳温度1300°C，重力系数1000和分离时间5 min的条件下，整个分离过程中Cu，Zn，Pb和Sn的总回收率分别为97.80％，95.59％，98.29％，和97.69％。与原始PCB中存在的贵金属相比，Cu合金中Ag，Au和Pd的含量分别增加了5.16、2和1.85倍，而最终残留物中的含量分别增加了2.92、1.59，和1.54倍。
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