Vitrification of MSWI Fly Ash Using Thermal Plasma Technology
In China, municipal solid waste incinerator (MSWI) fly ash is classified as hazardous waste owing to its high concentration of leachable heavy metals and the presence of chlorinated organic compounds, such as dioxins and furans. In this study, the vitrification process based on thermal plasma technology has been employed to convert toxic incinerator fly ashes into harmless stable products. The toxicity characteristic leaching procedure (TCLP) test has been performed to evaluate the chemical resistance of the vitrified slag. The amount of heavy metals leached is much lower compared with the regulatory limit, which reveals that the contaminants are sufficiently immobilized in the silicate matrix and the produced slag satisfies the environmental standards. The microstructure, crystalline phase, as well as the density and porosity of the glass slag are also investigated. Such vitrified product with good quality has great potential to be used as a viable alternative for construction applications. These promising results indicate that thermal plasma vitrification process is very effective and reliable for stabilization, detoxification and recycling of MSWI fly ashes.
Thermal plasma Vitrification process Incinerator fly ash Vitrified Slag Leaching behaviour
Xin Tu Jianhua Yan Zengyi Ma Qin Wang Kefa Cen Bruno Chéron
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China CNRS UMR 6614 - CORIA, St Etienne du Rouvray, 76801, France
国际会议
2007杭州国际动力工程会议(The International Conference on Power Engineering 2007)
杭州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）