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<p>The increasing shortage of high-grade iron ore has led to a greater dependence on beneficiated concentrates, necessitating pelletization for optimal functioning of the blast furnace. JSW Steel Limited intends to synchronize pellet basicity with the blast furnace slag in order to handle ores containing more than 8% gangue. This research explores the possibility of manufacturing high-basicity pellets with existing raw materials while keeping essential physical and metallurgical characteristics in place. Pellets with a basicity of 0.15 were fired at a temperature range of 1260–1320&#xa0;°C, with 1280&#xa0;°C found to be the optimal temperature. The basicity was subsequently adjusted from 0.15 to 1.2 at a temperature of 1280&#xa0;°C with 0.8 weight percent MgO present. Results at 0.45 basicity were most impressive, yielding cold compressive strength of 295&#xa0;kg/pellet, 26.12% porosity, 5.77% reduction degradation index, 68.64% reducibility index, and 17.22% swelling index. An analysis of the material’s microstructure revealed a uniform distribution of slag phases and pores, thus confirming the feasibility of producing high-basicity pellets within existing material limitations.</p>

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Effect of Increased Basicity on Induration Behavior, Mechanical Strength, and Reduction Characteristics of Iron Ore Pellets

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • K. S. Sridhara,
  • Ravindra Kumar,
  • Mrunmaya Kumar Pasupalak,
  • Dhanveer Seepersad,
  • Dabbiru Satish Kumar

摘要

The increasing shortage of high-grade iron ore has led to a greater dependence on beneficiated concentrates, necessitating pelletization for optimal functioning of the blast furnace. JSW Steel Limited intends to synchronize pellet basicity with the blast furnace slag in order to handle ores containing more than 8% gangue. This research explores the possibility of manufacturing high-basicity pellets with existing raw materials while keeping essential physical and metallurgical characteristics in place. Pellets with a basicity of 0.15 were fired at a temperature range of 1260–1320 °C, with 1280 °C found to be the optimal temperature. The basicity was subsequently adjusted from 0.15 to 1.2 at a temperature of 1280 °C with 0.8 weight percent MgO present. Results at 0.45 basicity were most impressive, yielding cold compressive strength of 295 kg/pellet, 26.12% porosity, 5.77% reduction degradation index, 68.64% reducibility index, and 17.22% swelling index. An analysis of the material’s microstructure revealed a uniform distribution of slag phases and pores, thus confirming the feasibility of producing high-basicity pellets within existing material limitations.