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<p>Present research aims to assess the feasibility of pelletization of various iron ore fines by blending them in a suitable proportion. Individual iron ore fines were characterized for their mineralogy and associated phases. Iron ore fines of varied silica and alumina in the range of ~ 3 to 10 and ~ 2.5 to 7 wt. %, respectively, were mixed and ground to generate varied fineness. Pellets were prepared, and their green and fired properties were assessed. For the assay blend of the iron ore fines, a fineness of ~ 3200 cm<sup>2</sup>/g was found suitable for pelletization which leads to comparatively low induration temperature requirement. Pellets produced out of blend consisting of iron ore fines of ~ 3200 cm<sup>2</sup>/gm Blaine No. and fired at 1290&#xa0;°C resulted in porosity 22.7%, CCS 243&#xa0;kg/pellets, RDI (− 6.3&#xa0;mm) 15.16% and AI (− 0.5&#xa0;mm) 7.13%. Considering CCS, RDI, AI and porosity value of the fired pellets, the optimum fineness of the blend of iron ore fines was ~ 3200 cm<sup>2</sup>/g, and firing temperature range was 1290 to 1300&#xa0;°C, respectively. The obtained results helped in utilization of high gangue iron ore fines in the required proportions at optimized fineness and induration temperature at pellet plant of JSW Steel Limited.</p>

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Impact of Blaine No. on the Properties of Iron Ore Pellets

  • 期刊论文

  • 发表日期：

    2025年3月28日

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  • Ravi Kant Sagar,
  • Ravindra Kumar,
  • Sridhara K S,
  • Satya Sindhu Biswal,
  • T. Umadevi,
  • Rameshwar Sah,
  • Dhiren Kumar Panda

摘要

Present research aims to assess the feasibility of pelletization of various iron ore fines by blending them in a suitable proportion. Individual iron ore fines were characterized for their mineralogy and associated phases. Iron ore fines of varied silica and alumina in the range of ~ 3 to 10 and ~ 2.5 to 7 wt. %, respectively, were mixed and ground to generate varied fineness. Pellets were prepared, and their green and fired properties were assessed. For the assay blend of the iron ore fines, a fineness of ~ 3200 cm2/g was found suitable for pelletization which leads to comparatively low induration temperature requirement. Pellets produced out of blend consisting of iron ore fines of ~ 3200 cm2/gm Blaine No. and fired at 1290 °C resulted in porosity 22.7%, CCS 243 kg/pellets, RDI (− 6.3 mm) 15.16% and AI (− 0.5 mm) 7.13%. Considering CCS, RDI, AI and porosity value of the fired pellets, the optimum fineness of the blend of iron ore fines was ~ 3200 cm2/g, and firing temperature range was 1290 to 1300 °C, respectively. The obtained results helped in utilization of high gangue iron ore fines in the required proportions at optimized fineness and induration temperature at pellet plant of JSW Steel Limited.