Flow Characterization and Inclusions Removal in a Slab Tundish Equipped with Bottom Argon Gas Feeding
- 38 Downloads
The fluid dynamics of a straight tundish was studied when Ar-gas was fed through the bottom, using mathematical simulation. Flow rates of 15 and 40 liters/min of argon in three locations into the tundish – near input steel, center, and near output steel – were analyzed. A stochastic model was employed for determining statistically the particle amount (emulating alumina particles) in the inclusions removal. From these calculations and those of the Residence Time Distribution (RTD) curves, we found a direct relationship to improve steel quality. Specifically, removal of the smaller nonmetallic inclusions was significantly enhanced for cases with the lowest dead volume fraction; they correspond to those of the highest averaged residence time. Therefore, it was found that it is even possible to reduce argon consumption and still obtain good results of steel cleanness.
Keywordstundish inclusions removal gas injection
The authors give thanks to CONACyT, DGEST, ITM, FIM-UMSNH and CÁTEDRAS CONACyT for their continuous support.
- 1.I. Tsubokura, D. Sommerville, and A. McLean, “Factors influencing the effectiveness of tundish metallurgy,” Iron Steelmaker, 12, No. 5, 58–62 (1985).Google Scholar
- 2.C. Marique, A. Dony, and J. Mahieu, “The bubbling of inert gas into the tundish – a means to improve steel cleanliness,” Iron Steelmaker, 17, No. 9, 15–16 (1990).Google Scholar
- 5.A. Ramos-Banderas, R. Morales, J. de J. Barreto, and G. Solorio, “Modelling study of inclusions removal by bubble flotation in the tundish,” Steel Res. Int., 77, No. 5, 325–335 (2006).Google Scholar
- 8.J. Méndez, C. Cicutti, A. Martin, et al., Utilización de Barreras de Argón en el Distribuidor para mejorar la limpieza de Inclusión en Planchones de Colada Continua, CONAC, Monterrey, México (2010).Google Scholar
- 10.J. de J. Barreto, G. Barrera, and C. Orozco, “Modelación física anisotérmica del flujo de acero usando inhibidores de turbulencia y cortinas de argon en el distribuidor de colada continua,” Memoria del XX Simposio Nacional de Siderurgia, Morelia, México (1999).Google Scholar
- 14.G. Solorio-Díaz, A. Ramos-Banderas, J. de J. Barreto, and R. Morales, “Modeling study of turbulent flow effect on inclusion removal in a tundish with swirling ladle shroud,” Steel Res. Int., 80, No. 3, 223–234 (2009).Google Scholar
- 17.M. Collur, D. Love, and B. Patil, Proceedings of the 80th Steelmaking Conference, I&S Society AIME, Warrendale (1997).Google Scholar