AVALIAÇÃO VIA MODELAGEM FÍSICA DOS EFEITOS DE ALGUNS PARÂMETROS OPERACIONAIS SOBRE A PRODUTIVIDADE DE CONVERSORES/CONVERTEDORES DE SOPRO COMBINADO
EVALUATION VIA PHYSICAL MODELING OF THE EFFECTS OF SOME GEOMETRICAL AND OPERATIONAL PARAMETERS ON THE PRODUCTIVITY OF A COMBINED BLOW CONVERTER
Gasparini, Vitor Maggioni; Silva, Carlos Antonio da; Silva, Itavahn Alves da; Almeida, Leandro; Seshadri, Varadarajan; Araújo, Ely da Silva
http://dx.doi.org/10.4322/tmm.00701006
Tecnol. Metal. Mater. Min., vol.7, n1-2, p.29-34, 2010
Resumo
Estuda-se pela modelagem física a influência de fatores geométricos e operacionais sobre o processo de mistura, velocidade de desgaseificação e taxa de ejeção de líquido em um reator de sopro combinado. Analisa-se a importância relativa do posicionamento das ventaneiras, e do padrão de sopro (distância lança-banho, vazão pela lança e vazão pelas ventaneiras) tendo por base um reator industrial de 80 toneladas.
Palavras-chave
Misturas, Desgaseificação, Projeções, Convertedor LD
Abstract
Physical modeling is employed in order to assess the influence of some geometrical and operational parameters of a combined blow converter on mixing, degasification and rate of projections. The relative role of bottom tuyeres location and blow pattern (top gas blowing rate, tuyeres blowing rate and lance to bath distance) has been clarified. Operational data have been taken from a 80 tons reactor.
Keywords
Mixing, Degaseification, Projections, LD converter
Referências
1 ALMEIDA, L. P. et al. Effects of some operational parameters upon degaseification rate, mixing time, splashing and skull
development in a combined-blow converter during steelmaking refining: a physical model approach. In: AISTEch 2010 –
THE IRON & STEEL TECHNOLOGY CONFERENCE AND EXPOSITION, 2010, Pittsburgh. Proceedings… Warrendale,
PA: AIST, 2010. p. 274-85.
2 TAGO, Y.; HIGUCHI, Y. Fluid analysis of jets from nozzles in top blow process. ISIJ International, v. 43, n. 2, p. 209-15, 2003.
3 NAITO, K.; KITAMURA, S.; OGAWA, Y. Effects of BOF top blowing and bottom stirring conditions on suppressing excessive oxidation. Ironmaking and Steelmaking, v. 29, n. 3, p. 209-14, June 2002.
4 JUNG, S.; FRUEHAN, R. J. Foaming characteristics of BOF slags. In: IRONMAKING CONFERENCE, 59., 2000, Pittsburgh, PA. Proceeedings… Warrendale, PA: ISS, 2000. p. 517-27.
5 HIGUCHI, Y.; TAGO, Y. Effect of nozzle twisted lance on jet behavior and spitting rate in top blown process. ISIJ Internacional, v. 43, n. 9, p. 1410-7, 2003.
6 SESHADRI, V. et al. Decarburization rates in RH-KTB degasser of CST steel plant through physical modelling study. Ironmaking and Steelmaking, v. 33, n. 1, p. 1-5, 2006
7 SESHADRI, V. et al. Optimization of the pig iron desulfurization inside a torpedo car by physical modeling techniques. In: TMS ANNUAL MEETING, 2005, San Francisco, CA. Warrendale, PA: TMS, 2005. p. 747-59
8 Luomala, M. J.; Fabritius, T. M. J.; Harkki, J. J. The effect of bottom nozzle configuration on the bath behavior in the BOF. ISIJ International, v. 44, n. 5, p. 809-16, 2003.
9 CHOUDHARY, S. K.; AJMANI, S. K. Evaluation of bottom stirring in BOF steelmaking vessel using cold model study e thermodynamic analysis. ISIJ International, v. 46, n. 8, p. 1171-6, 2006.
2 TAGO, Y.; HIGUCHI, Y. Fluid analysis of jets from nozzles in top blow process. ISIJ International, v. 43, n. 2, p. 209-15, 2003.
3 NAITO, K.; KITAMURA, S.; OGAWA, Y. Effects of BOF top blowing and bottom stirring conditions on suppressing excessive oxidation. Ironmaking and Steelmaking, v. 29, n. 3, p. 209-14, June 2002.
4 JUNG, S.; FRUEHAN, R. J. Foaming characteristics of BOF slags. In: IRONMAKING CONFERENCE, 59., 2000, Pittsburgh, PA. Proceeedings… Warrendale, PA: ISS, 2000. p. 517-27.
5 HIGUCHI, Y.; TAGO, Y. Effect of nozzle twisted lance on jet behavior and spitting rate in top blown process. ISIJ Internacional, v. 43, n. 9, p. 1410-7, 2003.
6 SESHADRI, V. et al. Decarburization rates in RH-KTB degasser of CST steel plant through physical modelling study. Ironmaking and Steelmaking, v. 33, n. 1, p. 1-5, 2006
7 SESHADRI, V. et al. Optimization of the pig iron desulfurization inside a torpedo car by physical modeling techniques. In: TMS ANNUAL MEETING, 2005, San Francisco, CA. Warrendale, PA: TMS, 2005. p. 747-59
8 Luomala, M. J.; Fabritius, T. M. J.; Harkki, J. J. The effect of bottom nozzle configuration on the bath behavior in the BOF. ISIJ International, v. 44, n. 5, p. 809-16, 2003.
9 CHOUDHARY, S. K.; AJMANI, S. K. Evaluation of bottom stirring in BOF steelmaking vessel using cold model study e thermodynamic analysis. ISIJ International, v. 46, n. 8, p. 1171-6, 2006.
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