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Investigation on Loss on Ignition to Study the Effect of Iron Ore Mineralogy in Green Pellet Growth Kinetics

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Abstract

This study corroborates that the iron ore mineralogy has significant effects on green pellet growth and its properties by both experimental and mathematical arguments. In this context, three iron ore samples with different loss on ignition (LOI): 2.64, 4.85 and 9.19 wt.% were taken. The mineralogical differences were investigated through X-ray diffraction, thermogravimetric analysis, and heating cycle studies. The pellet properties; green compressive strength, drop, and moisture were evaluated for 8–16 mm green pellets. An empirical correlation was developed to predict the average green pellet size (DAvg.) in correlation with disc rpm (RD), inclination (ID), retention time (T), LOI (L), and feed size (d50) of the ore with root-mean-square deviation of 0.290. The effect of mineralogy was quantified by modifying the existing self-preserving size distribution model using DAvg. and the operating variables with R2 of 0.941. The comparison between observed and predicted DAvg was found with R2 of 0.985.

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Authors and Affiliations

  1. Department of Chemical Engineering, Indira Gandhi Institute of Technology Sarang, Dhenkanal, Odisha, 759146, India

    Kashinath Barik

  2. Mineral Processing Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, Odisha, 751013, India

    Pallishree Prusti & Surendra Kumar Biswal

  3. Department of Fuel, Minerals and Metallurgical Engineering, Indian Institute of Technology (ISM) Dhanbad, Dhanbad, Jharkhand, 826004, India

    Kashinath Barik, Shatrughan Soren & R. Venugopal

  4. Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, Westbengal, 721302, India

    Pallishree Prusti & B. C. Meikap

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  1. Kashinath Barik
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  2. Pallishree Prusti
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  3. B. C. Meikap
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  4. Shatrughan Soren
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  5. R. Venugopal
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  6. Surendra Kumar Biswal
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Correspondence to Pallishree Prusti.

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Barik, K., Prusti, P., Meikap, B.C. et al. Investigation on Loss on Ignition to Study the Effect of Iron Ore Mineralogy in Green Pellet Growth Kinetics. Trans Indian Inst Met 75, 481–493 (2022). https://doi.org/10.1007/s12666-021-02449-6

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  • DOI: https://doi.org/10.1007/s12666-021-02449-6

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