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Effect of Application of Compressive and Shear Force on Iron Ore Pellet Wet Feed on Green and Fired Pellet Quality

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Abstract

Iron ore pelletizing using compressive and shear action on wet mixture feed has been studied. The physical properties, namely, moisture content, drop strength, green compressive strength (GCS), dry compressive strength (DCS), porosity, and cold crushing strength (CCS), have been studied. Pelletizing tests were carried out on four different types of ore, namely, hematite ore, magnetite ore, goethite ore, and sinter return fines. The inference of shear forces on silica distribution index in dry pellet has been studied using optical and scanning electron microscopy. Significant improvement in physical strength was observed due to compressive and shear forces on the pellet mixture feed. However, decrease in moisture content and ball porosity has been observed. Silica distribution index improved by 1.72 times for hematite ore, 1.47 times for magnetite ore, and 1.68 times for goethite ore. It has been found that bubble cavity has been reduced which is good indicator in terms of physical properties.

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Acknowledgements

The authors wish to thank the management of Tata Steel, especially Mr. Vinay V Mahashabde (Chief R&D and Product Technology), for permission to use the necessary data in this publication. The authors also want to thank Mr. Surajit Sinha, Chief of Agglomerates, for his inputs. The authors also want to thank Mr. Md Irfan Ansari, Md. Sahib, and Mr Sajid Ansari for experimental support. Thanks are also due to Mr. Uttam Singh (Vice President—Iron Making) and Dr. Debashish Bhattacharjee (Vice President—Technology and New Material Business) for their support of this project.

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This project is supported by Tata Steel Ltd.

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Correspondence to Neha Gupta.

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Gupta, N., Sekhar, C., Basha, S.M. et al. Effect of Application of Compressive and Shear Force on Iron Ore Pellet Wet Feed on Green and Fired Pellet Quality. Mining, Metallurgy & Exploration 39, 805–821 (2022). https://doi.org/10.1007/s42461-022-00540-0

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