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Characteristics of heavy metals during heat-treatment municipal solid waste incinerator (MSWI) fly ash were investigated in this paper. The experiment was performed using a pilot-scale oil furnace in the range 800-1350°C.In this work we investigated the effect of temperature on solidification efficiency, evaporation of heavy metals and on composition change, X-ray diffractometer (XRD), the leach toxicity of molten slag. The results showed that the main contents, solidification efficiency and evaporation of heavy metals had a tremendous change between 1150-1260°C. With temperature increasing, the percentage of CaO, SiO2 and Al2O3 increased, and SO3, K2O, Na2O and Cl decreased. Especially in 1260°C, the four compositions decreased sharply from 43.72% to 0.71%. Finally, the leaching concentrations of all heavy metals in molten slag were far lower than the standard values of TCLP

Behavior of Heavy Metals in the Vitrification of MSWI Fly Ash with a Pilot-scale Diesel Oil Furnace