Dry beneficiation of high loss-on-ignition fly ash

Dry beneficiation of three high loss-on-ignition (LOI) fly ashes were conducted. The combination of two different types of dry separation techniques—ultrasonic sieving and triboelectrostatic separation—were used for this study. The results indicate that a simple separation of unburned carbon from fl...

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Bibliographic Details
Published in:Separation and purification technology 2002-03, Vol.26 (2), p.177-184
Main Authors: Soong, Y, Schoffstall, M.R, Gray, M.L, Knoer, J.P, Champagne, K.J, Jones, R.J, Fauth, D.J
Format: Article
Language:English
Subjects:
Applied sciences
Combustion of solid fuels
Combustion. Flame
Dry separation
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fly ash
Other industrial wastes. Sewage sludge
Pollution
Theoretical studies. Data and constants. Metering
Triboelectrostatic
Ultrasonic sieving
Wastes
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Summary:Dry beneficiation of three high loss-on-ignition (LOI) fly ashes were conducted. The combination of two different types of dry separation techniques—ultrasonic sieving and triboelectrostatic separation—were used for this study. The results indicate that a simple separation of unburned carbon from fly ash is achievable at particle sizes of 149, 74 and 44 μm, and screening could be utilized as the rough separation mechanism for fly ash. Subsequently, triboelectrostatic separations were conducted on these different particle size fractions of the fly ash and indicated that the final carbon content in the products, as low as 2.5% or as high as 60%, can be further adjusted with the combination of dry sieving and triboelectrostatic separation.
ISSN:1383-5866
1873-3794
DOI:10.1016/S1383-5866(01)00162-9