Steel desulfurization on RH degasser : physical and mathematical modeling.

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dc.contributor.authorSilva, Antonio Marlon Barros
dc.contributor.authorPeixoto, Johne Jesus Mol
dc.contributor.authorSilva, Carlos Antônio da
dc.contributor.authorSilva, Itavahn Alves da
dc.date.accessioned2022-10-03T20:59:26Z
dc.date.available2022-10-03T20:59:26Z
dc.date.issued2022pt_BR
dc.description.abstractDue to the high-quality steel demand, especially for ultra-low Sulfur steel, RH desulfurization has been practiced. Based on this, mathematical and physical modeling have been applied to study steel desulfurization by reagent addition in the RH degasser vacuum chamber. The main result of cold modeling, using water and oil emulating steel and slag, respectively, was to assess the influence of density difference between the continuous and disperse phases on oil droplet behavior. It is shown that its flow tends to be more restricted near the down snorkel when the density difference increases. Moreover, these results provide the basis for CFD modeling validation, which enabled the determination of slag drop residence time inside steel on RH and the average value of the rate of dissipation of turbulent kinetic energy inside the RH ladle. These two pa- rameters were used to develop a kinetic model, which reaches a good agreement with industrial trial results available in literature. The optimum desulfurization degree of 31.44% was achieved for a gas flow rate of 90 Nm3 /h, according to the kinetic model. This value can be useful in some steel grade production, where the required S content is less than 10 ppm. Even in common steel grade production, if some punctual chemical adjustment is necessary, this technique is also useful. The main kinetic parameter for steel desulfurization is the steel circulation rate. For best results, it should be reduced in the desulfurization stage, and after that, the normal operation can be resumed, so that the production cycle is not affected.pt_BR
dc.identifier.citationSILVA, A. M. B. et al. Steel desulfurization on RH degasser : physical and mathematical modeling. REM - International Engineering Journal, Ouro Preto, v. 75, p. 27-35, jan./mar. 2022. Disponível em: <https://www.scielo.br/j/remi/a/wJ9TRHXvpWNWSdRhnRpjnSd/>. Acesso em: 29 abr. 2022.pt_BR
dc.identifier.doihttps://doi.org/10.1590/0370-44672021750058pt_BR
dc.identifier.issn2448-167X
dc.identifier.urihttp://www.repositorio.ufop.br/jspui/handle/123456789/15587
dc.language.isoen_USpt_BR
dc.rightsabertopt_BR
dc.rights.licenseAll content of the journal, except where identified, is licensed under a Creative Commons attribution-type BY. Fonte: o PDF do artigo.pt_BR
dc.subjectModeling of steelmakingpt_BR
dc.titleSteel desulfurization on RH degasser : physical and mathematical modeling.pt_BR
dc.typeTrabalho apresentado em eventopt_BR
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