Wei Li1, Jia Sun2, Deng-Feng Ma1, Xian-Long Liu1, Sheng Li1, Jian-Ye Bei2, Ming-Xiu Zhan2, Xiao-Qing Lin3, Tong Chen This email address is being protected from spambots. You need JavaScript enabled to view it.3 1 Daye Nonferrous Metals Co., Ltd., Huangshi, 435005, Hubei Province, China
2 College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, 310018, Zhejiang Province, China
3 State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang Province, China
Received:
May 31, 2023
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
Revised:
October 12, 2023
Accepted:
October 15, 2023
Download Citation:
||https://doi.org/10.4209/aaqr.230126
Li, W., Sun, J., Ma, D.F., Liu, X.L., Li, S., Bei, J.Y., Zhan, M.X., Lin, X.Q., Chen, T. (2024). Dioxin Control in the Co-processing of Waste Printed Circuit Board and Copper Concentrate with an Ausmelt Furnace. Aerosol Air Qual. Res. 24, 230126. https://doi.org/10.4209/aaqr.230126
Cite this article:
In recent years, with the rapid growth of the amount of electronic equipment, the environmental pollution caused by waste printed circuit board (WPCB) has become increasingly serious. Co-processing of WPCB and copper concentrate is an economic and effective way to realize the resource utilization of WPCB. However, there are few reports on the inhibition of dioxin by high concentration of SO2 generated from copper concentrate during co-processing. From the perspective of dioxin distribution, the effects of different co-processing ratios, SO2 concentration and other factors were systematically studied. The actual environment of the Ausmelt furnace was simulated by using a laboratory tubular furnace, and the emission characteristics of dioxins were investigated. Compared with the disposal of WPCB alone, the total concentration and toxic equivalent quantity (TEQ) of dioxins decreased by 14.7–26.8% and 34.7–46.5%, respectively, with the change in the proportion used during co-processing. Additionally, with the increase in SO2 concentration, the total concentration and TEQ value of dioxins decreased by 11.1–29.8% and 5.1–26.9%, respectively. Furthermore, the low-chlorinated dioxin congeners increased and high-chlorinated ones decreased. Most importantly, it was revealed that the dioxin formed during co-processing was suppressed by the deactivation of metal catalysts and the reduction of chlorine sources. These findings will facilitate the rational control of dioxin emissions with the co-processing of WPCB in an Ausmelt furnace.HIGHLIGHTS
ABSTRACT
Keywords:
Dioxins, Co-processing, Waste printed circuit boards, Inhibition mechanism, SO2
