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Flotation of nonmetallic inclusions during argon injection into the tundish of a continuous-casting machine. Part 2

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Abstract

The mixing of metal and slag where argon bubbles enter the atmosphere is analyzed by physical modeling. The best results are obtained with bubbling injection at a rate of 10–12 L/min, when the bubble diameter on reaching the slag phase is 3.25 mm. The mass of the metal droplets captured in the slag is 0.6 g; their speed in the slag phase is 1 m/s; the penetration depth is 3 cm; and the residence time is 0.4 s. That corresponds to optimal refining of the steel in the tundish. With the given injection parameters, the streamlines entrain steel at a rate of around 50 L/min (350 kg/min).

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Authors and Affiliations

  1. Donetsk National Technical University, Donetsk, Ukraine

    A. N. Smirnov & A. V. Kravchenko

  2. Kiev Polytechnic Institute, National Technical University of Ukraine, Kiev, Ukraine

    V. G. Efimova

Authors
  1. A. N. Smirnov
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  2. V. G. Efimova
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  3. A. V. Kravchenko
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Corresponding author

Correspondence to A. N. Smirnov.

Additional information

Original Russian Text © A.N. Smirnov, V.G. Efimova, A.V. Kravchenko, 2014, published in “Izvestiya VUZ. Chernaya Metallurgiya,” 2014, No. 1, pp. 19–25.

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Smirnov, A.N., Efimova, V.G. & Kravchenko, A.V. Flotation of nonmetallic inclusions during argon injection into the tundish of a continuous-casting machine. Part 2. Steel Transl. 44, 11–16 (2014). https://doi.org/10.3103/S0967091214010185

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  • DOI: https://doi.org/10.3103/S0967091214010185

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