Recycling of municipal solid waste incineration fly ash in foam ceramic materials for exterior building walls

Fan, Yibo; Li, Shujing; Li, Yuanbing; Liang, Huqing; Tang, Mengxiong; Huang, Keke; Zhu, Lin

doi:10.1016/j.jobe.2021.103427

Cited by 14 publications

(11 citation statements)

References 23 publications

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“…The additives, 20 such as foaming agents and co‐solvents, also play an important role in the preparation of foamed ceramics, the low‐cost additives help to accelerate the application of large‐scale industrial production 9,21 . ‐ 23 For example, the waste glass with high Si/Al silicate material could be used to reduce the melting point temperature of the formed solids 24,25 . The sodium element in albite (Na 2 O·Al 2 O 3 ·6SiO 2 ) facilitates the conversion of Al3+ from octahedral to tetrahedral in the sample, allowing the eutectic melting at low temperatures, and thus reducing the viscosity of the liquid phase 26 .…”

Section: Introductionmentioning

confidence: 99%

“…9,[21][22][23] For example, the waste glass with high Si/Al silicate material could be used to reduce the melting point temperature of the formed solids. 24,25 The sodium element in albite (Na 2 O⋅Al 2 O 3 ⋅6SiO 2 ) facilitates the conversion of Al3+ from octahedral to tetrahedral in the sample, allowing the eutectic melting at low temperatures, and thus reducing the viscosity of the liquid phase. 26 Talc assists in volume expansion to counteract the sintering shrinkage, which could be used to reduce the apparent density of the sample.…”

Section: Introductionmentioning

confidence: 99%

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Coal gangue‐based ceramics foams by water spray granulation and post particle stacking method

Dai,

Zhang,

Meng

et al. 2024

Int J Applied Ceramic Tech

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Foamed ceramics were prepared by the water spray granulation and post particle stacking method using coal gangue as the main raw material. The effects of raw material weight ratio (i.e., raw material composition by varying the content of dolomite and talc), calcination temperature, time, and heating rate on the pore structure and properties of the samples were investigated and the foaming mechanism of foamed ceramics was revealed. The crystalline phase of foamed ceramics mainly consisted of quartz, anorthite, and enstatite. The decrease of dolomite content and the increase of talc content in the raw materials led to the initial decrease and then increase of the pore size dispersion coefficient, while the apparent porosity and water absorption of the samples gradually decreased, and the apparent density increased. The sample with a composition of gangue:waste glass:dolomite:albite:talc of 65:5:10:10:10 and calcined at 1200°C for 10 min with a heating rate of 1°C/min has the optimized uniform pore structure. This study provides a high value‐added utilization of coal gangue, and the experimental basis for the preparation of low‐cost foamed ceramics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coal gangue‐based ceramics foams by water spray granulation and post particle stacking method

Dai,

Zhang,

Meng

et al. 2024

Int J Applied Ceramic Tech

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show abstract

“…5 Between them, fly ash is considered hazardous as it contained large amount of heavy metals and toxic organics. 6 Besides residues from MSW incineration, fly ash also contained reagents and products from flue gas neutralization. Therefore, the main elements in fly ash included O, Cl, S Ca, Si, Al, Fe, Mg, Na and K as well as toxic elements such as Pb, Cd, Cr, Ni, Zn, Cu, etc.…”

Section: Introductionmentioning

confidence: 99%

Controlling reactions during heavy metal leaching from municipal solid waste incineration fly ash

Chen

Wang

et al. 2023

JSCS

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This research aimed to characterize the physical, chemical properties of municipal solid waste incineration fly ash and investigate the leaching of heavy metals during Toxicity Characteristics Leaching Procedure (TCLP) process. To understand the leaching behavior, concentrations of heavy metals, chloride, sulfate and calcium at various leaching time was monitored together with pH of the leaching solution. Results showed that chemical compositions of fly ashes led to differences in leaching environment. For the two fly ashes under study, one resulted in a leaching environment of pH of 10-12 while the other had a pH about 6-7. Based on pH, anions and cations concentrations, Minteq software was employed to investigate the speciation of heavy metals. Results showed that the shift in precipitation/dissolution balance of carbonate and hydroxides of heavy metals could explain the fluctuation in metal concentrations during the leaching process. This indicates that leaching was probably controlled by these reactions. On the other hand, addition of EDTA changed the controlling reactions. Chelating reactions between heavy metals and EDTA led to much higher leaching toxicity of heavy metals showing that presence of chelating organics in natural environment may facilitate heavy metal leaching.

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“…Vitrification as a solution for ash immobilization and, respectively, for immobilizing CRT-type waste is the subject of recent studies that pursue the valorization of the products obtained in areas such as mortars [62], ceramic foams [63,64], porous glass ceramics [65], etc. This paper suggests a new recycling alternative using a lower-than-usual temperature firing for both CRT waste and fly ash, together with kaolin, to obtain new materials able to immobilize the barium and lead ions brought by the glass waste in the glass ceramic matrix.…”

Section: Introductionmentioning

confidence: 99%

New Glass Ceramic Materials Obtained from Cathode Ray Tubes Glass Wastes and Fly Ash

et al. 2023

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This paper presents an alternative way to recycle cathode ray tube glass waste, together with fly ash and kaolin, into new glass ceramic materials. The samples were obtained using three firing temperatures: 700, 800, and 900 °C. The effect of the fly ash/CRT waste ratio upon the materials’ firing shrinkage, apparent density, apparent and total porosity, chemical stability, and compression strength was investigated. The firing shrinkage used as a dimensional stability parameter, a firing shrinkage range between 2.19–8.18%, was positively influenced by the waste mix amount. The apparent density of the obtained materials is positively affected by the heat treatment temperature, rising from 2.09 to 2.93 (g·cm−3), while the apparent porosity decreases with the increase of the firing temperature from 6.08 to 2.24 %. All the studied glass ceramics show very good chemical stability and complete immobilization of the Pb2+ and Ba2+ ions in the glass ceramic matrix. The compression strength of the sintered materials ranges between 1.42–11.83 (N·mm−2), being positively influenced by the kaolin amount and negatively influenced by porosity. The obtained results confirm the viability of the proposed alternative to use CRT waste and fly ash together with kaolin to obtain glass ceramic materials that can be used for outdoor paving applications.

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Recycling of municipal solid waste incineration fly ash in foam ceramic materials for exterior building walls

Cited by 14 publications

References 23 publications

Coal gangue‐based ceramics foams by water spray granulation and post particle stacking method

Coal gangue‐based ceramics foams by water spray granulation and post particle stacking method

Controlling reactions during heavy metal leaching from municipal solid waste incineration fly ash

New Glass Ceramic Materials Obtained from Cathode Ray Tubes Glass Wastes and Fly Ash

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