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提高废弃印刷电路板中非金属元件浮性的环保方法:在干磨过程中添加排水管油

Chun-Chen Nie¹, Si-Qi Jiang¹, Xi-Guang Li¹

¹College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China.

Waste management (New York, N.Y.)

|September 17, 2023

概括

在废弃印刷电路板 (WPCB) 的干磨过程中添加排水管油可以显著改善非金属颗粒 (NMP) 的去除. 这种方法提高了NMP的浮性,促进了WPCB的金属回收.

科学领域:

材料科学材料科学材料科学
环境工程环境工程
化学工程是化学工程的重要组成部分.

背景情况:

废弃印刷电路板 (WPCB) 是复杂的二次资源,需要高效的金属回收.
目前的逆漂浮方法因不充分去除非金属颗粒 (NMP) 而困难.
在传统漂浮中,NMPs的表面特性阻碍了有效的泡粘附和收集器吸附.

研究的目的:

开发一种清洁,高效的方法来改善从WPCB中去除NMP.
通过修改其表面特性来增强NMP的浮性.
为了研究在WPCB回收过程中干研磨过程中使用排水管油的情况.

主要方法:

在从WPCB中干磨NMP时使用排水管油.
使用扫描电子显微镜 (SEM) 分析NMP表面形态.
通过富里埃变换红外光谱法 (FTIR) 调查功能组.
使用接触角 (CA) 分析测量表面的疏水性.
进行漂浮运动实验以评估性能.

主要成果:

SEM揭示了粗略的NMP形态抑制了泡粘附;水的入使收集器吸附复杂化.
FTIR证实了共享的功能组 (-CH3, -CH2, -C=O, -C-O) 在NMPs上促进了沟沟油吸附.
排水沟油吸附增加了接触角度,表明增强的疏水性.
漂浮实验显示,NMP积累的漂浮物产量显著增加,从67.05%增加到95.02%.
由于增加了NMP的浮性,树脂回收率提高了31.10%.

结论:

用排水管油干磨削有效地增强了NMP的漂浮性.
这种方法提供了一个潜在的解决方案,以提高WPCB回收的整体漂浮效率.
该方法为从电子垃圾中回收有价值金属提供了更清洁的途径.

关键词:

干式研磨干式研磨干式研磨环保的处理方式.增强了漂浮能力.排水沟油的使用方法非金属颗粒是非金属颗粒.废弃的印刷电路板废弃的印刷电路板

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