High temperature behavior of electrostatic precipitator ash from municipal solid waste combustors

Forestier, Lydie Le; Libourel, G.

doi:10.1016/j.jhazmat.2007.10.034

Cited by 24 publications

(4 citation statements)

References 23 publications

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“…Comparison with the results of differential scanning calorimetry (DSC) revealed that the mass loss rate was the highest between 1050 and 1150 C, just before the initiation of overall melting. The DSC trace showed several endothermic peaks, which can be attributed to the decomposition of KCl, NaCl, Na 2 O, K 2 O, and alkaline metallic sulfates, and the evaporation of volatile metals (Tables 1 and 2), similar being reported by Le Forestier and Libourel (2008). The main melting process started just below 1200 C, as in other investigations (Cheng and Chen, 2004).…”

Section: Microstructures Of Fly Ash and Its Productssupporting

confidence: 80%

Effect of thermal processing on the characteristics of incineration fly ash

Zupanič

Orešek

Samec

2012

j air waste manag assoc

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This work investigated the possibilities of immobilizing incineration fly ash by applying different processing methods. Direct sintering of fly ash at 1050 C produced material with increased resistance to leaching; however, the high content of halides prevented the achievement of appropriate strength. Fly ash melting and casting into metallic moulds resulted in the formation of glass with good chemical resistivity and mechanical properties, which were further improved by devitrification, and the formation of glass-ceramics. The most successful combination of strength and resistance to leaching was obtained by a process consisting of fly ash melting, by pouring the melt into water, then grinding, and sintering without additives at 850-950 C. In this way, a material was produced that cannot only be landfilled as a stabilised and non-reactive waste in landfills for non-hazardous wastes, but can also be utilized as a valuable material for manufacturing useful products. This article provided valuable results for policy-makers in Slovenia, about the handling fly ash from incineration plants.Implications: Fly ash from an incineration plant was thermally treated using several processing routes. Ash-melting, by pouring the melt into water and sintering, produced glass-ceramics having an optimal combination of strength and resistance to leaching that can find applications as useful products. These results provide important data for policy makers in Slovenia regarding the building of incineration plants, and handling the solid-waste products, especially fly ash.

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Section: Microstructures Of Fly Ash and Its Productssupporting

confidence: 80%

Effect of thermal processing on the characteristics of incineration fly ash

Zupanič

Orešek

Samec

2012

j air waste manag assoc

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“…The processing of municipal waste fly ash causes both evaporation (Jakob et al 1995), as well as stabilization (Chou et al 2009) of heavy metals, depending on the ash treatment temperature. Cd and Pb are usually highly volatile (Jakob et al 1995), whereas Cu and Zn volatilization strongly depends on air quantity (Jakob et al 1995, Serum et al 2003, and Ni is not released during thermal treatment (Forestier and Libourel 2008). Their solubility is poor, therefore only a very limited quantity of heavy metals should be released into the aqueous solution through water leaching.…”

Section: Discussionmentioning

confidence: 99%

Archives of Environmental Protection

Falaciński¹,

Wojtkowska²

2021

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In Poland, in recent years, there has been a rapid accumulation of sewage sludge -a by-product in the treatment of urban wastewater. This has come about as a result of infrastructure renewal, specifically, the construction of modern sewage treatment plants. The more stringent regulations and strategic goals adopted for modern sewage management have necessitated the application of modern engineering methodology for the disposal of sewage sludge. One approach is incineration. As a consequence, the amount of fly ash resulting from the thermal treatment of municipal sewage sludge has grown significantly. Hence, intensive work is in progress for environmentally safe management of this type of waste. The aim of the experiment was to evaluate the possibility of using the fly ash that results from municipal sewage sludge thermal treatment (SSTT) as an additive to hardening slurries. The article presents the technological and functional parameters of hardening slurries with an addition of fly ash obtained by SSTT. Moreover, the usefulness of these slurries is analyzed on the basis of their basic properties, i.e., density, contractual viscosity, water separation, structural strength, volumetric density, hydraulic conductivity, compressive and tensile strength. The research on technological and functional properties was carried out, the aim of which was to determine the practical usefulness of the hardening slurries used in the experiment. Subsequently, leaching tests were performed for heavy metals in the components, the structure of the hardening slurries. An experiment showed leaching of hazardous compounds at a level allowing their practical application. The article presents the potential uses of fly ash from SSTT in hardening slurry technology.

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“…As for evaporation, the distribution ratios of metal elements in BFA are generally determined by volatility. For fine-grained fly ash, more than 90% of evaporation in air is obtained at 670 o C for Pb, 750 o C for Cd [16] , and the volatilization ratios of Cd and Pb from OFA are almost 100% during melting [17] . All the Cr deposits to slag [15,18] .…”

Section: Behavior Of Heavy Metalsmentioning

confidence: 99%

Effect of Feed Forms on the Results of Melting of Fly Ash by a DC Plasma Arc Furnace

Chen

Meng

Jiabiao

et al. 2009

Plasma Sci. Technol.

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Fly ash from a municipal solid waste incinerator (MSWI) without preprocessing (original fly ash, OFA) was melted by a direct current (DC) plasma arc furnace to investigate how the feed forms governed the results. Dioxins in flue gas from stack and bag-filter ash (BFA) were detected. The distribution of heavy metals of Pb, Cd, As, and Cr along the flue gas process system was analyzed. Through a comparison of the results for dioxins and heavy metals in this study and previous work, carrying-over of fly ash particles with the flue gas stream can be deduced. Based on the magnetic induction equation and Navier-Stokes equations, a magnetohydrodynamic (MHD) model for the plasma arc was developed to describe the particle-carrying effect. The results indicate that, a. when melted, the feed forms of MSWI fly ash affect the results significantly; b. it is not preferable to melt MSWI fly ash directly, and efforts should be made to limit the mass transfer of OFA from the plasma furnace.

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High temperature behavior of electrostatic precipitator ash from municipal solid waste combustors

Cited by 24 publications

References 23 publications

Effect of thermal processing on the characteristics of incineration fly ash

Effect of thermal processing on the characteristics of incineration fly ash

Archives of Environmental Protection

Effect of Feed Forms on the Results of Melting of Fly Ash by a DC Plasma Arc Furnace

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