Thermomechanical Modelling of a Steel Ladle Using Periodical Homogenisation for the Refractory Masonries

E. Blond1, N. Yahmi1, L. B. Teixeira2, A. Gasser3, S. Sinnema4

1 University Orléans, INSA CVL, PRISME, Orléans/France
2 Magnesita Refractories, Contagem/Brazil
3 University Orléans, INSA CVL, PRISME, Orléans/France
4 Tata Steel Ijmuiden/The Netherlands

Revision 03.05.2017, 09.05.2017

Volume 9, Issue 3, Pages 76 - 82

Abstract

In the steelmaking industry and in many others that involve the processing of molten metal, the metallurgical vessels can be lined with refractory bricks, with or without mortar. These refractory masonries can have different designs (for example parallel or radial for a bottom lining) with different joint thicknesses. The design of these linings poses a complex problem, since the bricks/joints subsystem imposes considerable computational problems due to the large amount of interfaces between them. To compare the influence of these designs on the maximum stresses in the structure, the masonry with dry joints was modelled by a homogeneous equivalent material that takes into account the possibility of joint closure. The thermomechanical properties of this equivalent material were determined using a periodic homogenization method. They are temperature depending and depend in the same time of the joint states (open or closed in the two directions). This masonry model was used to simulate the problem of a complete steel ladle with the finite element method, considering the insulating, safety and working (masonry) linings. It demonstrates the influence of the following parameters: (a) presence or not of joints, (b) thickness of joints, and (c) masonry design. This study brings a help for the design of refractory masonry linings and provides a better estimation of the applicability of a given lining to the thermomechanical loads imposed by operational conditions.

Keywords

thermomechanical modelling, refractory masonry, periodic homogenisation, steel ladle

References

[1] Rafiee, A.; Vinches, M.; Bohatier, C.: Modelling and analysis of the Nîmes arena and the Arles aqueduct subjected to a seismic loading, using the non-smooth contact dynamics method. Engin. Structures 30 (2008) [12] 3457–3467[ 2] Cecchi, A.; Sab, K.: A multi-parameter homogenisation study for modeling elastic masonry. Europ. J. of Mech. A/Solids 21 (2002) [2] 249– 268[ 3] Cecchi, A.; Sab, K.: Out of plan model for heterogeneous periodic materials: the case of masonry. Europ. J. of Mech. A/Solids 21 (2002) [5] 715–746[ 4] Anthoine, A.: Derivation of the in-plane elastic characteristics of masonry through homogenisation theory. Int. J. Solid Structures 32 (1995)[ 2] 137–163[ 5] Luciano, R.; Sacco, E.: Homogenization technique and damage model for old masonry material. Int. J. of Solids and Structures 34 (1997)[ 24] 3191–3208[ 6] Nguyen, T.M.H.; et al.: Mechanical homogenisation of masonry without mortar. Europ. J. of Mech. A 28 (2009) [3] 535–544[ 7] Brulin, J.; et al.: Latest evolution in blast furnace hearth thermomechanical stress modelling. Proc. 4th STEEL SIM, Düsseldorf (2011).

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