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A Novel Method of Producing Iron Nugget Under Flash Heating

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Abstract

This investigation demonstrates the formation of a unique coconut-shell-type iron nugget by flash heating an off-grade iron ore–graphite composite pellet at 1200 °C. An analytical estimation showed that flash heating at 1200 °C could achieve a pellet heating rate of 150 °C/min value. This is in contrast to the maximum furnace heating rate of 25 °C/min, where the maximum pellet heating rate may, at best, equal the furnace heating rate. The factsage calculation showed that carburized iron remained in the liquid state at 1200 °C and slag in the solid state. Liquid iron oozes out to the pellet surface and forms a hard shell of iron nugget at the periphery, leaving slag at the interior. Optimum carbon (C/O = 1) and basicity (0.84) produced a higher iron yield in the nugget.

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Acknowledgements

The authors acknowledge the financial assistance provided by the MHRD-MoS-ASP, Govt.-of-India-sponsored project.

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  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur, WB, 721302, India

    Banty Kumar & Gour Gopal Roy

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  1. Banty Kumar
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  2. Gour Gopal Roy
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Correspondence to Banty Kumar.

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Kumar, B., Roy, G.G. A Novel Method of Producing Iron Nugget Under Flash Heating. Trans Indian Inst Met 76, 3483–3496 (2023). https://doi.org/10.1007/s12666-023-03024-x

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