Pyrolysis processing and metal recycling of waste circuit boards by using low-temperature alkaline melts

被引：0

作者：

Ma H.-B. ^{[1
,2
]}

Zhu M.-W. ^{[1
]}

He J. ^{[2
]}

Chen B. ^{[2
]}

Zhang L.-L. ^{[2
]}

Jiang H.-X. ^{[2
]}

Sun X.-J. ^{[2
]}

Zhao J.-Z. ^{[2
]}

机构：

[1] School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang

[2] Institute of Metal Research, Chinese Academy of Sciences, Shenyang

来源：

Zhu, Ming-Wei (mwzhu@sau.edu.cn); He, Jie (jiehe@imr.ac.cn) | 1600年 / Central South University of Technology卷 / 31期

基金：

中国国家自然科学基金;

关键词：

Metal recycling; Molten alkali; Waste memory modules; Waste printed circuit boards;

D O I：

10.11817/j.ysxb.1004.0609.2021-37725

中图分类号：

学科分类号：

摘要：

The printed waste circuit boards(WPCBs) are not only kind of solid waste with complicated physical structure and chemical composition, but also some resources rich in valuable metals. The recycling of waste memory modules (WMMs), which is the most difficult to deal with among WPCBs, was investigated in the present work. The effects of temperature, time and material ratio on the dissociation of the non-metals and metals in WMMs were analyzed. The degradation mechanism of the non-metallic parts in WMMs (brominated epoxy resin, fiber glass, etc.) during molten-alkali treatment was proposed from the thermodynamic viewpoint. The results show that the degradation rate of non-metallic materials in WMMs can reach 95.45% if the reaction is continuously kept at 400 ℃ for 60 min in the reaction kettle with the mass ratio of mixture of hydroxides to WMM (mMH/mWMM)of 5. The obtained metal mixture contains the elements Cu, Fe, Ni and precious metals Au and Ag. © 2021, Science Press. All right reserved.

引用

页码：443 / 452

页数：9

共 25 条

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