Faculté des Sciences appliquées
Faculté des Sciences appliquées

Simulation of cement rotating kilns for operating purposes

Fouarge, Adèle ULiège
Promotor(s) : Bruls, Olivier ULiège ; David, Robert
Date of defense : 26-Jun-2019/27-Jun-2019 • Permalink :
Title : Simulation of cement rotating kilns for operating purposes
Translated title : [fr] Simulation de fours rotatifs à ciment pour leur opération
Author : Fouarge, Adèle ULiège
Date of defense  : 26-Jun-2019/27-Jun-2019
Advisor(s) : Bruls, Olivier ULiège
David, Robert 
Committee's member(s) : Arnst, Maarten ULiège
Dumont, Marie-Noëlle ULiège
Language : English
Number of pages : 78
Keywords : [en] Cement kiln
[en] Modeling
[en] Time-varying flame length
Discipline(s) : Engineering, computing & technology > Energy
Engineering, computing & technology > Chemical engineering
Funders : Technord
Target public : Professionals of domain
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil électromécanicien, à finalité spécialisée en énergétique
Faculty: Master thesis of the Faculté des Sciences appliquées


[en] Cement is an important material for society, being a base component of concrete. Indeed, concrete
is widely used in construction. But the production of cement is energy-intensive and thus has a high
impact on environment. The objective of this thesis is to give operators of cement rotary kilns a reliable
model on which they may test possible actions and see the future effect of these actions. The possibility of
choosing the most appropriate action will thus improve production efficiency. The model must be quickly
solved. The shorter the computation time, the more actions the operator may test. For this objective, a
1D partial-differential-equations model is developed. Its equations system is based on mass and energy
balances which are expressed with mass and energy transfers. Due to the high differences between the
flame and no-flame zones of the kiln, the equations are different in the flame and no-flame zones. A
second model is then developed. The second model presented here includes modified equations such that
the sizes of the different zones adapt to the exact flame length. It also allows representing a time-varying
flame length. In that model, the number of nodes assigned to the flame zone is predetermined. Next,
the implementation is performed in Matlab using the method of lines with finite differences from the
Matmol toolbox. At the end, several scenarios are simulated in order to test the model. It shows the
physical coherence of the model, the coherence of both models, that the mass and energy balances are
respected and most importantly that the second model is more efficient. Indeed, it requires less nodes and
a notably smaller computation time. In conclusion, the modeling of cement rotary kilns has been improved.



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  • Fouarge, Adèle ULiège Université de Liège > Master ing. civil électro., à fin.


Committee's member(s)

  • Arnst, Maarten ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational and stochastic modeling
    ORBi View his publications on ORBi
  • Dumont, Marie-Noëlle ULiège Université de Liège - ULiège > Department of Chemical Engineering > Department of Chemical Engineering
    ORBi View his publications on ORBi
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  • Total number of downloads 2

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