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Experimental Study on Mixing in Gas-Stirred Ladles with and without the Slag Phase through a Water Physical Model

Published online by Cambridge University Press:  14 February 2012

Adrián M. Amaro-Villeda ,
Jorge A. González Bello  and
Marco A. Ramírez-Argáez.
Adrián M. Amaro-Villeda
Affiliation:
Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, [email protected], [email protected]
Jorge A. González Bello
Affiliation:
Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, [email protected], [email protected]
Marco A. Ramírez-Argáez.
Affiliation:
Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, [email protected], [email protected]
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Abstract

A 1/6th gas–stirred water physical model of a 140 ton steel ladle is used to evaluate mixing in air–water and air–water–oil systems to model argon–steel and argon–steel–slag systems respectively. Thickness of the slag layer is kept constant at 0.004 m. The effect of the gas flow rate (7, 17, and 37 l/min), plug position (0, 1/3, ½, and 2/3 of the ladle radius, R), and number of plugs (1, 2, and 3) on mixing time is also analyzed in this work. Gas is injected at the bottom of the ladle under several plug configurations varying both position and number of plugs. Chemical uniformity of 95% is selected as mixing criterion. Mixing times are experimentally determined when a tracer is suddenly injected into the ladle and the model is instrumented with a pH meter to track the time evolution of the tracer concentration (NaOH 1 M solution) in a given location inside the ladle. Process conditions for best mixing in both water–gas and water-gas–slag systems are: a single plug located at 2/3 of the ladle radius with a gas flow rate of 17 l/min.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1373: Symposium S4 – Advanced Structural Materials—2011 , 2012 , imrc-1373-s4-25
Copyright
Copyright © Materials Research Society 2012

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References

REFERENCES

1. Mazumdar, D. and Guthrie, R.: The physical and mathematical modelling of gas stirred ladle Systems, ISIJ int. 35 No.1, 1-20 (1995).Google Scholar
2. Mazumdar, D. and Evans, J. W.: Macroscopic models for gas stirred ladles, ISIJ Int. 44 No.3, 447 (2004).Google Scholar
3. Jönsson, P. G., and Jonsson, L. T. I.: The use of fundamental process models in studying ladle refining operations, ISIJ Int. 41, 1289 (2001).Google Scholar
4. Zhu, M.-Y., Inomoto, T., Sawada, I.: Fluid flow mixing phenomena in the ladle stirred by argon through multi-tuyere, ISIJ int. 35 No.5, 472-479 (1995).Google Scholar
5. Takatsuka y, Y. Iguchi, M.: Effect of swirl motion on mixing time in water bath agitated by upward gas injection, ISIJ int., 41, No.2, 124-127 (2001).Google Scholar
6. Mazumdar, D., Kim, H. B. and Guthrie, R. I. L.: Modelling criteria for flow simulation in gas stirred ladles: experymental study. Ironmaking & Steelmaking, 27, No.4, 302 (2000).Google Scholar
7. Madan, M., Satish, D., and Mazumdar, D.. Modeling of mixing in ladles fitted with dual plugs, ISIJ Int., 45, 677. (2005).Google Scholar
8. Mandal, J., Patil, S., Madan, M. and Mazumdar, D.: Mixing time and correlation for ladles stirred with dual porous plugs, Metall. Trans., 36B, 479 (2005).Google Scholar
9. Han, J. W., Heo, S. H., Kam, D. H., You, B. D. Pak, J. J. and Song, H. S.: Transient fluid flow phenomena in a gas stirred liquid bath with top oil layer-approach by numerical simulation and water model experiments, ISIJ Int., 41 No. 10, 1165–1173 (2001).Google Scholar