The Use of FBC Fly Ash in the Preparation of Portland Cement Clinker

Abstract:

The present work focuses on the use of fluid fly ash for Portland clinker burning. Fluid ashes are carriers of all basic oxides represented in the cement raw meal. However, while the share of hydraulic oxides is in ashes sufficient, there is a significant deficiency in calcium oxide content. Preliminary studies have shown that the combination thereof with calcite as the second essential component of the fluid fly-ashes for the raw material based on Portland clinker burning application, it is necessary to solve a problematic issues. The first one concerns the potential leakage SOx resulting from decomposition of CaSO₄ ash into the atmosphere. The second circumstance is the correction tracks raw meal in order to redistribute in the samples prepared under the initial studies, the obtained clinker minerals content in favor of calcium silicate, of them further in favor of alite. The last issue is the evaluation of the impact of fluid utilization of fly ash as a partial raw material bases for reducing CO₂ emissions in the Portland clinker burning.

• Periodical: Key Engineering Materials (Volume 722)
• Pages: 168-172
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.722.168
• Online since: December 2016
• Authors: Karel Kulísek, Dominik Gazdič*, Karel Dvořák, Marcela Fridrichová
• Keywords: Cement, Clinker, Fluidized Bed Combustion Fly Ash, Gypsum, Limestone

References

[1] DVOŘÁK, K., FRIDRICHOVÁ, M., GAZDIČ, D., KULÍSEK, K. Cenizas volantes de lecho fluidizado como un componente bas de las materias del cemento portland, Cemento Hormigón. Ediciones cemento, S.L. Madrid 2011. ISSN 0008-8919.

DOI: 10.20868/upm.thesis.1139

[2] P.C. Hewlett, Lea's Chemistry of Cement and Concrete, Fourth Edition, ISBN-13 978-0-7506-6256-7.

[3] SEBÖK,T., ŠIMONÍK,J., KULÍSEK,K. The compressive strength of samples containing fly ash with high content of calcium sulfate and calcium oxide. Cement and Concrete Research, 2001, vol. 31, No. 7, pp.1101-1107.

DOI: 10.1016/s0008-8846(01)00506-3

[4] BOTHA, F., Overview of the Fluidized Bed Combustion Process and Material, Illinois Clean Coal Institute, Carterville, Illinois, 2001, p.1 – 4.

[5] SCHUECK, J., TARANTINO, J., KANIA T., SCHEETZ, B., The Use of FBC Ash for Alkaline Addition at Surface Coal Mines, 2001 International Ash Utilization Symposium, University of Kentucky, Kentucky, 2001, p.16.

[6] SEBÖK,T., KULÍSEK,K., ŠIMONÍK,J. The influence of organic additives on solidified FBC-P parameters. Environment Protection Engineering. 2003, vol. 29, No. 1, pp.53-63.

[7] MAENAMI, H., ISU, N., ISHIDA, E.H., MITSUDA, T., Electron microscopy and phase analysis of fly ash from pressurized fluidized bed combustion, Cement and Concrete Research, www. sciencedirect. com, (2004).

DOI: 10.1016/j.cemconres.2003.08.011