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Municipal solidMunicipal solid waste incineration fly ash waste incinerationElectric arc furnace melting fly ash (MSWI-FA) has the prominent issues of high content of heavy metals and chlorides, significant environmental hazards, and the substantial challenges in achieving large-scale and harmless treatmentHarmless treatment. This study employs a 50 kVA pilot-scale DC electric arc furnace (EAF) melting experiment to investigate the impact of water-washingWater washing and Na2CO3 additionNaCO addition on the vitrified product (VP) generated during the harmless treatmentHarmless treatment of MSWI-FA via EAF melting. The results demonstrate that water-washingWater washing significantly reduces the chloride content in MSWI-FA, achieving removal efficiencies of 95.2%, 94.2% and 91.6% for NaCl, KCl and CaCl2 respectively. The addition of Na2CO3 exerts an even greater influence on the chlorine content within VP, reducing the final chlorine content to nearly 0%. The heavy metal toxicity of final VP is substantially lower than the limits stipulated for Class III water quality standards in the “Environmental Quality Standards for SurfaceSurface Water” (GB 3838-2002).

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Experimental Research of Municipal Solid Waste Incineration Fly Ash in Electric Arc Furnace Melting Process Integrated with Water-Washing and Na2CO3 Addition

  • 会议论文

  • 发表日期：

    2026年

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  • Hang Hu,
  • Chen Gong,
  • Shuai Wang,
  • Feng Chen,
  • Yufeng Guo,
  • Lingzhi Yang

摘要

Municipal solidMunicipal solid waste incineration fly ash waste incinerationElectric arc furnace melting fly ash (MSWI-FA) has the prominent issues of high content of heavy metals and chlorides, significant environmental hazards, and the substantial challenges in achieving large-scale and harmless treatmentHarmless treatment. This study employs a 50 kVA pilot-scale DC electric arc furnace (EAF) melting experiment to investigate the impact of water-washingWater washing and Na2CO3 additionNaCO addition on the vitrified product (VP) generated during the harmless treatmentHarmless treatment of MSWI-FA via EAF melting. The results demonstrate that water-washingWater washing significantly reduces the chloride content in MSWI-FA, achieving removal efficiencies of 95.2%, 94.2% and 91.6% for NaCl, KCl and CaCl2 respectively. The addition of Na2CO3 exerts an even greater influence on the chlorine content within VP, reducing the final chlorine content to nearly 0%. The heavy metal toxicity of final VP is substantially lower than the limits stipulated for Class III water quality standards in the “Environmental Quality Standards for SurfaceSurface Water” (GB 3838-2002).