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In recent years, with the application of large amounts of high-aluminium iron ore and smelting technology of a high proportion of iron ore pelletsIron ore pellet in blast furnace burden, ratio of magnesium/aluminum in blast furnace slag tended to fall. To improve the mass fraction of magnesium oxideOxides, the effect of three different magnesium-containing fluxesMagnesium-containing flux on the performance of alkalineAlkaline iron ore pelletsIron ore pellet was investigated. Results showed that there was some adverse effect of magnesium-containing flux A on the compressive strength of green alkalineAlkaline iron ore pelletsIron ore pellet, while there was an adverse effect of magnesium-containing flux C on drop numbers of the pellets, which may be related to the presence of unslaked quicklime in magnesium-containing C. With the MgOMgO mass fraction increasing, the compressive strength of alkalineAlkaline iron ore pelletsIron ore pellet after roastingRoasting showed a decreasing trend. Adding magnesium-containing flux was beneficial to decreasing reduction swelling index and improving reduction degreeReduction degree of alkalineAlkaline iron ore pelletsIron ore pellet after roastingRoasting. On the whole, the effect of magnesium-containing flux A on compressive strength and reduction performance of the pellets was the least, while that of magnesium-containing flux B was the greatest.

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Effect of Magnesium Oxide on Performance of Alkaline Iron Ore Pellets

  • 会议论文

  • 发表日期：

    2025年

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  • Rongguang Xu,
  • Yongxin Li,
  • Ruiqing Qian,
  • Pengcheng Wang,
  • Liming Yang,
  • Dawei Sun,
  • Xiangjuan Dong,
  • Yunqing Tian

摘要

In recent years, with the application of large amounts of high-aluminium iron ore and smelting technology of a high proportion of iron ore pelletsIron ore pellet in blast furnace burden, ratio of magnesium/aluminum in blast furnace slag tended to fall. To improve the mass fraction of magnesium oxideOxides, the effect of three different magnesium-containing fluxesMagnesium-containing flux on the performance of alkalineAlkaline iron ore pelletsIron ore pellet was investigated. Results showed that there was some adverse effect of magnesium-containing flux A on the compressive strength of green alkalineAlkaline iron ore pelletsIron ore pellet, while there was an adverse effect of magnesium-containing flux C on drop numbers of the pellets, which may be related to the presence of unslaked quicklime in magnesium-containing C. With the MgOMgO mass fraction increasing, the compressive strength of alkalineAlkaline iron ore pelletsIron ore pellet after roastingRoasting showed a decreasing trend. Adding magnesium-containing flux was beneficial to decreasing reduction swelling index and improving reduction degreeReduction degree of alkalineAlkaline iron ore pelletsIron ore pellet after roastingRoasting. On the whole, the effect of magnesium-containing flux A on compressive strength and reduction performance of the pellets was the least, while that of magnesium-containing flux B was the greatest.