The Application of Computational Thermodynamics in the Understanding and Control of Clogging and Scum in Continuous Casting of Steel

Botelho, Tamires; Medeiros, Guilherme Cardoso; Ramos, G. L.; Silva, André Luiz Vasconcellos da Costa e

doi:10.1007/s11669-017-0525-z

Cited by 6 publications

(1 citation statement)

References 17 publications

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“…Clogging can be generally considered in five steps, as depicted in Figure 1 Single-phase-based Eulerian approach [10,16], Eulerian-Lagrangian approach [17][18][19][20], Eulerian-Eulerian two-phase approach [21,22] were tried to simulate clogging phenomena. Computational thermodynamics has also been adopted to investigate reactions and inclusion formation which are responsible for clogging [1,23,24]. Recently water models have also been considered to study the effects of as-clog SEN on the flow pattern inside the mold region [25].…”

Section: Introductionmentioning

confidence: 99%

Transient simulation of melt flow, clogging, and clog fragmentation inside SEN during steel continuous casting

Barati,

Wu,

Kharicha

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Clogging of submerged entry nozzle (SEN) during continuous casting of steel is an undesirable phenomenon leading to different problems like flow blockage, slag entrainment, nonuniform solidification, etc. A transient numerical model for nozzle clogging based on an Eulerian-Lagrangian approach was developed and it covers the main steps of clogging: (a) formation of the first oxide layer by chemical reactions on the steel-refractory interface; (b) motion of non-metallic inclusions (NMIs) due to the turbulent melt flow towards the SEN wall; (c) interactions between the melt, the NMI, and the wall; (d) formation and growth of the clog by the deposition of NMIs on the clog front and the flow-clog interactions; and (e) detachment/fragmentation of a part of clog due to the flow drag force. Clogging in an industrial scale SEN was simulated. The simulated clog front was compared with real as-clogged SENs. The modeling results have successfully explained the SEN clogging induced transient flow phenomenon in the mold region, i.e. the transition from the stable to an unstable and non-symmetrical flow.

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