Thermal treatment of municipal solid waste incinerator fly ash using DC double arc argon plasma

Wang, Qin; Yan, Jun; Tu, Xin; Chi, Yong; Li, Xiaodong; Lu, Shengyong; Cen, Kefa

doi:10.1016/j.fuel.2008.12.011

Cited by 77 publications

(50 citation statements)

References 19 publications

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“…There are three kinds of vitrification based on the heat source: electric melting, burner melting and blast melting. While electric melting furnace is an expensive technology, due to the high cost of the equipment and significant energy consumption, they are widely regarded as a clean technology, because they can destroy toxic organics, stabilize heavy metals, and recover useful metals during the melting process (Kuo et al, 2004;Yang et al, 2008;Wang et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Emissions of Polybrominated Diphenyl Ethers during the Thermal Treatment for Electric Arc Furnace Fly Ash

Lin

Zhou

Shih

et al. 2012

Aerosol Air Qual. Res.

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This study investigated the fate of polybrominated diphenyl ethers (PBDEs) in a thermal treatment system that was employed to recover the metals from the electric arc furnace (EAF) fly ash. After 1450°C thermal treatment, the content of PBDEs in the EAF fly ash (50128 ng/kg) was greatly reduced by 98.9%, based on the solid destruction efficiency (SDE). The sums of five PBDE contents in ingot and slag were 86.0 and 32.3 ng/kg, respectively, revealing that the residual PBDE content in slag was much lower than those in woodland (180 and 710 ng/kg) and grassland (440 ng/kg) soils (Harrad and Hunter, 2006). With this PBDE level, the slag can be either safely disposed of in landfills or utilized as construction material. After the 1450°C thermal treatment and 1200°C secondary combustion, 95.8% of the PBDEs were destroyed or removed without air pollution control devices (APCDs). The PBDE concentrations in cooling unit and filter (APCDs) were 8810 and 327 pg/Nm 3 , respectively, while that in the PUF cartridges (final emission) was 13009 pg/Nm 3 . However, the PBDE concentration of the untreated flue gas was 22.1 ng/Nm 3 , which is still higher than that measured in the exhausts from various stationary sources (15.7-46.7 ng/Nm 3 ) (Wang et al., 2010a, c). Fortunately, the concentration of PBDEs can be effectively reduced to a much lower level (13.0 ng/Nm 3 ) in the flue gas. In addition, after the Pearson correlation analyses, the logarithm contents of PBDEs and PCDD/Fs showed a statistically high correlation (r = 0.930-1.000). Consequently, thermal treatment with APCDs can effectively reduce the PBDEs in EAF fly ash, while the heavy metals can also be recovered.

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Section: Introductionmentioning

confidence: 99%

Emissions of Polybrominated Diphenyl Ethers during the Thermal Treatment for Electric Arc Furnace Fly Ash

Lin

Zhou

Shih

et al. 2012

Aerosol Air Qual. Res.

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“…Electric melting furnaces are usually considered as a cleaner technology, although they are more expensive, due to the high equipment cost and energy consumption. Vitrification can destroy toxic organic compounds, stabilize heavy metals and recover precious metals by the melting process (Kuo et al, 2004;Yang et al, 2008;Wang et al, 2009a;Chuang et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans during the Thermal Treatment of Electric Arc Furnace Fly Ash

Lin

Zhou

Shih

et al. 2011

Aerosol Air Qual. Res.

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Thermal treatment is often employed to recover the metals contained in electric arc furnace (EAF) fly ash, which is considered a major source of PCDD/Fs. After the present treatment, the mass and volume of untreated material (EAF fly ash + cullet) were significantly reduced by 44.2 and 89.2%, respectively; meanwhile the density increased significantly by 476%. These results indicate that the mass and volume of EAF fly ash can be effectively reduced to benefit the further disposal in landfill. Additionally, this study also investigated the fate of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) during the thermal treatment. For the EAF fly ash with an original PCDD

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“…8 -10 Vitrification is used because it can destroy toxic organics, stabilize hazardous metals, and recover useful metals during the melting process. [11][12][13] Vitrification processes are divided into three categories according to the heat source: electric melting, burner melting, and blast melting. 6 An electric melting process does not make secondary pollution because its heat generating process is unlike those used in burner and blast melting, which may emit polycyclic aromatic hydrocarbons or other organic pollutants during the combustion process.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of Residues Obtained from the Treatment of Laboratory Waste. Part 1—Treatment Path of Metals in a Plasma Melting System

Kuo

Chang

et al. 2010

Journal of the Air & Waste Management Association

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The objective of this study is to investigate the treatment path of metals during the plasma vitrification of fly ash, bottom ash, sludge, and activated carbon collected from a laboratory waste treatment plant. Sampling, digestion, and analysis procedures that followed the standard methods of the Taiwan Environmental Protection Administration were used to determine the composition of the input and output materials. The microstructure was qualitatively examined using a scanning electron microscope. The results show that the vitrification process successfully vitrified the toxic input materials into a stable, glassy, amorphous slag. During vitrification, metals with low boiling points (As, Cd, Hg, Pb, and Zn) were vaporized into the flue gas. Metals with high boiling points and high specific weights went into the ingot, and the residual metals remained in the molten materials as the slag. The distribution of metals shows their behavior during vitrification and can provide a reference for vitrifying hazardous materials.

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Thermal treatment of municipal solid waste incinerator fly ash using DC double arc argon plasma

Cited by 77 publications

References 19 publications

Emissions of Polybrominated Diphenyl Ethers during the Thermal Treatment for Electric Arc Furnace Fly Ash

Emissions of Polybrominated Diphenyl Ethers during the Thermal Treatment for Electric Arc Furnace Fly Ash

Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans during the Thermal Treatment of Electric Arc Furnace Fly Ash

Stabilization of Residues Obtained from the Treatment of Laboratory Waste. Part 1—Treatment Path of Metals in a Plasma Melting System

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