Metal behavior during vitrification of incinerator ash in a coke bed furnace

Kuo, Y.Y.

doi:10.1016/j.jhazmat.2004.02.053

Cited by 45 publications

(29 citation statements)

References 16 publications

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“…According to a previous study, the distribution of metal species is governed by their boiling points and specific weights. 13 In this work, the metal species with low boiling points (including As, Cd, Hg, Pb, and Hg) were mainly vaporized into the flue gas during vitrification and regarded as VO metals. All the metal species, except for Al, were removed by APCD with an efficiency of more than 99%.…”

Section: Mass Distribution Of Metal Species In Output Materialsmentioning

confidence: 99%

“…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%

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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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Section: Mass Distribution Of Metal Species In Output Materialsmentioning

confidence: 99%

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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“…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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“…[1][2][3][4] After vitrification, useful metals can be recovered, with the residue encapsulated by a glassy matrix. 5,6 Organic toxic substances are destroyed, and inorganic hazardous materials are transformed into stable slag. 7,8 Although vitrification is regarded as an advanced technology for treating hazardous materials, high operation cost and expensive equipment limit its practical application.…”

Section: Technical Papermentioning

confidence: 99%

Stabilization of Residues Obtained from the Treatment of Laboratory Waste: Part 2—Transformation of Plasma Vitrified Slag into Composites

Kuo

Tseng

Chang

et al. 2011

Journal of the Air & Waste Management Association

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The Sustainable Environment Research Center of National Cheng Kung University in Taiwan has set up a treatment plant to dispose of laboratory waste. In the treatment process, the residue from the incineration system and the physical and chemical system is vitrified by a plasma melting system. Part 1 of this study described the treatment path of metals during vitrification. In Part 2, plasma vitrified slag is reused by using a molding technology. Unsaturated polyester resin and glass fiber were used as the molding material and additive, respectively, in the molding process. With an appropriate mixing ratio of unsaturated polyester resin, glass fiber, and slag, the physical properties of composites improved, and the ultimate tensile strength reached 17.6 MPa. However, an excess amount of slag reduced the strength and even retarded the production of composites. Differential thermal analysis and the water bathing test results show that the composite decomposed at 80°C and that it vaporized at 187°C. Although the unsaturated polyester resin decomposed, the metal encapsulated in the slag did not leach out. The results show that the reuse of slag using molding technology should be taken into consideration.

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Metal behavior during vitrification of incinerator ash in a coke bed furnace

Cited by 45 publications

References 16 publications

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

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

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 2—Transformation of Plasma Vitrified Slag into Composites

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