An Experimental Study on the Melting Solidification of Municipal Solid Waste Incineration Fly Ash

Jing Gao, Tao Wang, Jie Zhao, Xiaoying Hu and Changqing Dong
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Jing Gao: National Engineering Laboratory for Biomass Power Generation Equipment, School of New Energy, North China Electric Power University, Beijing 102206, China
Tao Wang: Solid Waste Project Department, Beijing Aerospace Petrochemical Technology EC and EP Corporation Limited, Beijing 100010, China
Jie Zhao: School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
Xiaoying Hu: National Engineering Laboratory for Biomass Power Generation Equipment, School of New Energy, North China Electric Power University, Beijing 102206, China
Changqing Dong: National Engineering Laboratory for Biomass Power Generation Equipment, School of New Energy, North China Electric Power University, Beijing 102206, China

Sustainability, 2021, vol. 13, issue 2, 1-10

Abstract: Melting solidification experiments of municipal solid waste incineration (MSWI) fly ash were carried out in a high-temperature tube furnace device. An ash fusion temperature (AFT) test, atomic absorption spectroscopy (AAS), scanning electron microscope (SEM), and X-ray diffraction (XRD) were applied in order to gain insight into the ash fusibility, the transformation during the melting process, and the leaching behavior of heavy metals in slag. The results showed that oxide minerals transformed into gehlenite as temperature increased. When the temperature increased to 1300 °C, 89 °C higher than the flow temperature (FT), all of the crystals transformed into molten slag. When the heating temperatures were higher than the FT, the volatilization of the Pb, Cd, Zn, and Cu decreased, which may have been influenced by the formation of liquid slag. In addition, the formation of liquid slag at a high temperature also improved the stability of heavy metals in heated slag.

Keywords: municipal solid waste incineration; fly ash; melting solidification; minerals; heavy metals (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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