Mineralogy and microstructure of sintered lignite coal fly ash☆

Ilić, Marko; Cheeseman, Christopher R.; Sollars, C.J.; Knight, Jennifer

doi:10.1016/s0016-2361(02)00272-7

Cited by 170 publications

(91 citation statements)

References 16 publications

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“…Investigated fl y ash consists highly amount of SiO 2 , Al 2 O 3 and Fe 2 O 3 , signifi cant levels of MgO and other alkali metal oxides. It also possesses relatively high level of CaO and belongs to a class C which is in accordance with the literature [13]. XRD analyses of the FA is shown in Table 2.…”

Section: Resultssupporting

confidence: 85%

“…There is a signifi cant formation of unconnected spherical pores with dimensions between 5-50m. According to [13], formation of the spherical pores is connected with softening of the glassy phase and evolution of gas. They pointed that similar pyroplastic effects have been observed in other materials where the gas generation is reported to be due to the decomposition of alkaline metal salts.…”

Section: Resultsmentioning

confidence: 99%

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Production and Characterization of Glass-Ceramics From Waste Materials

Angjusheva

2011

QOL

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Abstract:The fl y ash, produced by power plant in Republic of Macedonia have been milled and sintered with addition of waste glass to obtain glass-ceramics. The physical, chemical and mechanical properties of fl y ash and waste glass were determined. Through adequate sintering time and temperature, the glass-ceramic materials were manufactured. Chemical, physical and mechanical properties of the obtained composites were defi ned. The optimal composition of the composite was fl y ash with the addition of 40% waste glass. Optimal sintering condition was 1000 o C with 1h isothermal time at fi nal temperature and heating rate of 10 o /min. The addition of 40%wt of waste glass in the fl y ashes increased the E-modulus from 4.24±1 to 30.55±2 GPa and increased the bending strength from 9.93±1 to 63.18±4 MPa Porosity of the compacts decreased from 44.34±3 to 14.32±2%. Investigation of durability of the produced systems did not show presence of any harmful elements in the obtained solution.Owning to combination of the macroscopic appearance, microstructure, mechanical and thermal properties developed, dense materials could be used in the civil engineering.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Production and Characterization of Glass-Ceramics From Waste Materials

Angjusheva

2011

QOL

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“…Recycling coal fly ash can be a good alternative to disposal, and could achieve significant economic and environmental benefits as well. More aggressive efforts have been undertaken recently, to recycle fly ash [2,3]. For example, about 20% of the fly ash generated is being used in concrete production.…”

Section: Introductionmentioning

confidence: 99%

A review of the alumina recovery from coal fly ash, with a focus in China

Yao

Xia

Sarker

et al. 2014

Fuel

314

117

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Coal fly ash, an industrial by-product, is derived from coal combustion in thermal power plants. It is one of the most complex and abundant of anthropogenic materials, and its improper disposal has become an environmental concern and resulted in a waste of recoverable resources. Coal fly ash is rich in alumina, making it a potential substitute for bauxite. With the diminishing reserves of bauxite resources as well as the increasing demand for alumina, recovering alumina from fly ash has attracted extensive attentions. The present review first describes the alumina recovery history and technologies, and then focuses on the recovery status in China. Finally, the current status of fly ash recycling and directions for future research are considered.

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“…The effect of particle size distribution, as a key process variable that controls sintering and the properties of the ceramics, was reported [Ilic, et al, 2003]. They studied the infl uence of treatments such as sieving and grounding on the properties of the sintered ceramics.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Process of Production of Ceramics From Waste Coal Ash Case Study: The Influence of the Mechanical Activation

Angjusheva

Jovanov

Lisichkov

et al. 2013

QOL

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Fly ash, a waste by-product obtained in a thermal power plant has been a generated problem of the disposal all over the world. Morphological characteristics, physicochemical properties and pozzolanic activity make this waste potential material for production of ceramics. In this study high density ceramics compacts were produced by using fl y ash from the power plant REK Bitola, Republic of Macedonia. In order to increase geometrical factor of activity, the mechanical activation of the fl y ash was applied. The process of optimization of the main process parameters is conducted, such as time of mechanical activation, sintering temperature and heating rate and their interactions on the properties of obtained dense ceramic porosity and bending strength as a response function. The optimization was performed through application of 3D surface method and the obtained results are presented in the graphical and analytical form using "Statgraphics Centurion" software package.

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Mineralogy and microstructure of sintered lignite coal fly ash☆

Cited by 170 publications

References 16 publications

Production and Characterization of Glass-Ceramics From Waste Materials

Production and Characterization of Glass-Ceramics From Waste Materials

A review of the alumina recovery from coal fly ash, with a focus in China

Optimization of the Process of Production of Ceramics From Waste Coal Ash Case Study: The Influence of the Mechanical Activation

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