Separation of ultrafine particles from class F fly ashes

Acar, Ilker
Robl, Thomas L.
Atalay, M. Umit
In this study, ultrafine particles were recovered from Catalagzi (CFA) and Sugozu (SFA) thermal power plant fly ashes using a specific hydraulic classification technology. Since fly ashes have a high tendency to be flocculated in water, settling experiments were first designed to determine the more effective dispersant and the optimum dosage. Two different types of the superplasticizers (SP) polymers based on sulphonate (NSF, Disal) and carboxylate (Glenium 7500) were used as the dispersing agents in these settling experiments. Hydraulic classification experiments were then conducted to separate ultrafine fractions from the fly ash samples on the basis of the settling experiments. According to the settling experiments, better results were achieved with the use of Disal for both CFA and SFA. The classification experiments showed that the overflow products with average particle sizes of 5.2 mu m for CFA and 4.4 mu m for SFA were separated from the respective as-received samples with acceptable yields and high enough recoveries of -5 mu m (ultrafine) particles. Overall results pointed out that the hydraulic classification technology used provided promising results in the ultrafine particle separations from the fly ash samples.


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In this thesis, characterization of two class F fly ashes (FA) from Çatalağzı and Sugözü thermal power plants were carried out and their utilization potentials in three different fields were examined. Characterization of sintered samples and determination of their utilization potentials in ceramic industry is the first research area in this thesis. For this purpose, the class F fly ash samples were first pressed into cylindrical specimen without the addition of any organic binders or inorganic additives, an...
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In this research, it is aimed to remove toxic heavy metals in waste water with the help of fly ash from Çayırhan thermal power plant. The chemical and physical properties (size distribution, specific surface area, porosity, chemical composition, etc.) of fly ash were determined. The experiments were carried out in synthetic waste water containing lead, zinc and copper metals at different concentrations with the addition of fly ash. The effects of metal concentration, agitation time, particle size, ash amoun...
Citation Formats
I. Acar, T. L. Robl, and M. U. Atalay, “Separation of ultrafine particles from class F fly ashes,” 2016, vol. 8, p. 01051, Accessed: 00, 2020. [Online]. Available: