Treatment process for MSW combustion fly ash laboratory and pilot plant experiments

Wilewska-Bien, Magda; Lundberg, Margareta; Steenari, Britt‐Marie; Theliander, Hans

doi:10.1016/j.wasman.2006.09.011

Cited by 23 publications

(20 citation statements)

References 15 publications

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“…Otherwise the concentrations of major elements are similar in all samples. Earlier work on ash from this boiler has shown that the concentrations of most elements remain relatively constant over the years (Abbas et al, 1999;Karlfeldt and Steenari, 2007;Wilewska-Bien et al, 2007). Zinc and copper are the most abundant trace elements, with concentrations of 3000-7000 mg/kg ash and 5000-10000 mg/kg respectively.…”

Section: Composition and Mineralogy Of Bulk Samples And Particle Sizementioning

confidence: 86%

Element associations in ash from waste combustion in fluidized bed

et al. 2010

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Section: Composition and Mineralogy Of Bulk Samples And Particle Sizementioning

confidence: 86%

Element associations in ash from waste combustion in fluidized bed

et al. 2010

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“…The study of wrapping fly ash by glass bottle has not reported in previous research. Moreover, problem of soluble salts drew attention of system analysis: washing fly ash removed 30% up to 95% of chlorine, and achieved high removal rates of 30.7-72.8% of Ca, Na, K, and Cl at liquid-to-solid rates (L/S) of 10, whereas Pb, Cd and some minor elements were removed by 10-30% [10][11][12][13]. It was mentioned stability and leaching properties of glassy slags would be improved because of more network structures in slag after washing process [5,14].…”

Section: Introductionmentioning

confidence: 99%

Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace

Fang

Chen

et al. 2017

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Keywords:MSW incineration fly ash Heavy metals Volatilization and leaching behavior DC arc plasma CaO -Al 2 O 3 -SiO 2 (CAS) A B S T R A C T Three fly ash samples collected from different waste incinerators were vitrified using a direct current arc plasma furnace at 1250-1400°C. The influence of water-wash extraction and wrapping pretreatment on the volatilization and leaching behavior of heavy metals was investigated. Results showed: After thermal arc plasma treatment, the volume reduction and weight loss of fly ash were in the range of 68.7-82.2% and 23.8-56.7%, respectively. The residual fractions (wt.%) of heavy metals in slag are in the following sequence: Cr < Ni < Cd < Pb < Cu < Zn. Water-washing could reduce the volatilization rate of heavy metals due to some volatile salts removed by washing, while wrapping of fly ash could most effectively resist heavy metals against volatilizing, especially for Zn and Ni. The possible CaO -Al 2 O 3 -SiO 2 (CAS) ratio for successful melting of fly ash is suggested to be CaO in range of 20-48%, Al 2 O 3 in range of 10-15%, and SiO 2 in range of 40-65%. Moreover, toxicity characteristic leaching procedure results showed that the leaching of heavy metals in slags was much lower than the standard limit of toxicity characteristic leaching procedure (TCLP).

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“…Thus, the criteria for equilibrium (no change in leaching concentration due to time or L/S) were not fulfilled. However, previous studies (Wilewska-Bien et al, 2007) with fly ash state that the main part of the release of soluble constituents takes place very rapidly and thus a residence time in the leaching tanks of 10-15 min would suffice.…”

Section: Timementioning

confidence: 97%