Modelling of calcium carbonate decomposition in cement plant precalciners

Authors: Chinyama, M. P. M.; Lockwood, F. C.; Yousif, S. Y. A.; Kandamby, N.

Source: Journal of the Energy Institute, Volume 81, Number 1, March 2008 , pp. 19-24(6)

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Abstract:

Broadly speaking, the raw materials in a cement manufacturing plant undergo two chemical processes: calcination and clinkerisation. Formerly, both occurred in the long rotating kiln common to all plant. However, in modern plant the calcination reaction (CaCO₃?CaO+CO₂) is displaced to a separate combustor known as the 'precalciner'. In the present study, different models of calcium carbonate decomposition (calcination) have been evaluated and a real plant 'in line precalciner' has been simulated using a computational fluid dynamics code. Although the calcination process is fundamentally complex, it is shown that precalciner performance can be adequately simulated by simplified models.

Keywords: CEMENT PRODUCTION; CALCINATION; PRECALCINER

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174602208X269355

Publication date: 2008-03-01

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