Experimental assessment of the gray cast iron production by inoculant injection

  • Guillermo Reyes-Castellanos ESIQIE-Instituto Politécnico Nacional
  • Alejandro Cruz Ramírez Metallurgy and Materials Department - ESIQIE-IPN
  • Víctor Hugo Gutiérrez-Pérez UPIIZ-Instituto Politécnico Nacional
  • Jorge Enrique Rivera-Salinas Centro de Investigación en Química Aplicada—CIQA
  • Ricardo Gerardo Sánchez-Alvarado ESIQIE-Instituto Politécnico Nacional
  • Eduardo Colin-García ESIQIE-Instituto Politécnico Nacional
Keywords: Gray iron, Injection, Inoculant, eutectic cell, mathematical simulation

Abstract


An initial assessment of the gray cast irons production by injecting an inoculant with a conveying gas into a molten iron bath was evaluated at a laboratory scale. A mathematical simulation was carried out to determine the hydrodynamic behavior between the inoculant particles injected into the molten iron. It was determined that an optimal interaction between the particles with the molten iron occurs at a lance depth of 7 cm and for the particle sizes fine (211 to 297 μm) and medium (421 to 590 μm), the residence time was of 0.38 and 0.4 s, respectively. The melting time was calculated at 0.0008 and 0.003 s for the particle sizes fine and medium, respectively. So, after injection, the FeSi of the inoculant melts quickly, releasing the inoculating elements of the inoculant which interact with the molten iron and forms oxides and sulfides creating nucleating sites during solidification. The injection technique allows for obtaining a type-A graphite distribution for the fine and medium particle sizes. The number of eutectic cells was increased when the inoculant particle size was decreased in spite of the low carbon and silicon contents used in the gray cast iron manufacturing.

Author Biographies

Guillermo Reyes-Castellanos, ESIQIE-Instituto Politécnico Nacional

Student of the doctoral program in metallurgy and materials

Alejandro Cruz Ramírez, Metallurgy and Materials Department - ESIQIE-IPN
Professor of Metallurgy
Víctor Hugo Gutiérrez-Pérez, UPIIZ-Instituto Politécnico Nacional

Professor of Metallurgy

Jorge Enrique Rivera-Salinas, Centro de Investigación en Química Aplicada—CIQA

Researcher at CIQA

Ricardo Gerardo Sánchez-Alvarado, ESIQIE-Instituto Politécnico Nacional

Professor of Metallurgy

Eduardo Colin-García, ESIQIE-Instituto Politécnico Nacional

Student of the doctoral program in metallurgy and materials

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Published
2021/02/28
How to Cite
Reyes-Castellanos, G., Cruz Ramírez, A., Gutiérrez-Pérez, V. H., Rivera-Salinas, J. E., Sánchez-Alvarado, R. G., & Colin-García, E. (2021). Experimental assessment of the gray cast iron production by inoculant injection. Journal of Mining and Metallurgy, Section B: Metallurgy, 57(1), 41-51. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/26155
Issue
Vol. 57 No. 1 (2021)
Section
Original Scientific Paper

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