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

Author

Listed:
  • 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
    State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China)

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.

Suggested Citation

  • Jing Gao & Tao Wang & Jie Zhao & Xiaoying Hu & Changqing Dong, 2021. "An Experimental Study on the Melting Solidification of Municipal Solid Waste Incineration Fly Ash," Sustainability, MDPI, vol. 13(2), pages 1-10, January.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:2:p:535-:d:476692
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    References listed on IDEAS

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    1. Chen-Piao Yen & Song-Yan Zhou & Yun-Hwei Shen, 2020. "The Recovery of Ca and Zn from the Municipal Solid Waste Incinerator Fly Ash," Sustainability, MDPI, vol. 12(21), pages 1-11, October.
    2. Charles H. K. Lam & Alvin W. M. Ip & John Patrick Barford & Gordon McKay, 2010. "Use of Incineration MSW Ash: A Review," Sustainability, MDPI, vol. 2(7), pages 1-26, July.
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    Cited by:

    1. Wei-Sheng Chen & Gregory Chen & Cheng-Han Lee, 2023. "Effects of Basicity Index on Incinerator Fly Ash Melting Process and Stabilization," Sustainability, MDPI, vol. 15(15), pages 1-12, July.
    2. Tomasz Kalak & Ryszard Cierpiszewski & Małgorzata Ulewicz, 2021. "High Efficiency of the Removal Process of Pb(II) and Cu(II) Ions with the Use of Fly Ash from Incineration of Sunflower and Wood Waste Using the CFBC Technology," Energies, MDPI, vol. 14(6), pages 1-22, March.

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