About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
|
Presentation Title |
Thermodynamic Study for Chlorination of Waste Circuit Boards |
Author(s) |
Ma Yan, Yuen Wu, Linfeng Hu, Ailiang Chen, Fenglong Sun, Xijun Zhang |
On-Site Speaker (Planned) |
Ma Yan |
Abstract Scope |
Waste circuit boards have a complex composition and more valuable elements, which have a high recycling value. In this paper, the thermodynamic laws of hydrometallurgy were investigated by consulting the thermodynamic datasheet, combining with the E-pH module of the HSC Chemistry 6.0 thermodynamic software, and drawing E-pH diagrams to investigate the thermodynamic rules of hydrometallurgy for the chlorination processing system of waste circuit boards. The results showed that the stabilization zone of each metal chlorine complex appeared when pH<1.98 and E>1.39V during the chlorination process, and the maintenance of this condition could achieve a better leaching effect of each metal during the chlorinated leaching.Also, the relationship between the effect of [Cl]T change on the concentration of each ion and the concentration fraction φ of each metal-chlorine complex versus [Cl]T were plotted. The results show that the concentration of each free metal ion decreases continuously with the increase of [Cl]T . |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Other |