各种捕收剂对废旧电路板回收的反浮选效率和机理。
Reverse flotation efficiency and mechanism of various collectors for recycling waste printed circuit boards.
机构信息
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China; School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
出版信息
Waste Manag. 2020 Feb 15;103:218-227. doi: 10.1016/j.wasman.2019.12.030. Epub 2019 Dec 31.
Reverse flotation was used to recover metal components from waste printed circuit boards (PCBs). The micro-morphology and chemical composition analysis of raw materials indicated that waste PCBs are mainly composed of glass fibers, ceramics and valuable metals. The effects of collector dosage and temperature on flotation efficiency were investigated and evaluated. The flotation results using various collectors showed that the efficient recovery of metal components could be achieved via reverse flotation with the diesel oil (DO) dosage of 370-1110 g/t, composite collector (CC) dosage of 370-740 g/t and laurylamine (LAM) dosage of 740 g/t, respectively. The suitable temperature should be controlled at around 20 °C for these collectors. The results also indicated that the selectivity of DO for nonmetal particles was stronger than that of CC and LAM. In summary, reverse flotation is a feasible and environmental approach for disposal of waste PCBs.
反浮选法用于从废弃印刷电路板（PCB）中回收金属部件。原材料的微观形貌和化学成分分析表明，废弃 PCB 主要由玻璃纤维、陶瓷和有价值的金属组成。研究并评估了捕收剂用量和温度对浮选效率的影响。使用各种捕收剂进行浮选的结果表明，通过反浮选可以有效地回收金属成分，柴油（DO）用量为 370-1110 g/t，复合捕收剂（CC）用量为 370-740 g/t，月桂胺（LAM）用量为 740 g/t。这些捕收剂的适宜温度应控制在 20°C 左右。结果还表明，DO 对非金属颗粒的选择性强于 CC 和 LAM。总之，反浮选是一种可行的、环保的处理废弃 PCB 的方法。
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