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This studyIron ore investigatesMetallic iron theMagnetic field nucleation and growthNucleation and growth behavior of metallic ironMetallic iron in Bayan Obo low-grade iron oreIron ore under magnetic fieldsMagnetic field by coupling low-temperatureTemperature solid-state reduction with magnetically enhanced reduction technology. The results indicate that the average particle size of metallic ironMetallic iron increases with rising magnetic fieldMagnetic field intensity. At a magnetic fieldMagnetic field intensity of 1.0 T and a reduction time of 60 min, the average particle size of metallic ironMetallic iron reached 26.95 μm, which is 2.26 times larger than that achieved without a magnetic fieldMagnetic field (B-0.0 T). Kinetic fittingKinetic fitting using the Avrami-Erofeyev model revealed that the nucleation rate under B = 1.0 T increased nearly tenfold; While the growth rate increased nearly 30-fold compared to B = 0.0 T. This work demonstrates the promoting effect of magnetic fieldsMagnetic field on the reduction process of iron oxides, providing valuable insights for exploring the mechanism of magnetically enhanced reduction and understanding the interaction mechanismInteraction mechanism of magnetic fieldsMagnetic field.

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Effect of Magnetic Field on Metallic Iron Growth in Bayan Obo Low-Grade Iron Ore

  • 会议论文

  • 发表日期：

    2026年

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  • Chenpu Kong,
  • Yongli Jin,
  • Yuxia Hou

摘要

This studyIron ore investigatesMetallic iron theMagnetic field nucleation and growthNucleation and growth behavior of metallic ironMetallic iron in Bayan Obo low-grade iron oreIron ore under magnetic fieldsMagnetic field by coupling low-temperatureTemperature solid-state reduction with magnetically enhanced reduction technology. The results indicate that the average particle size of metallic ironMetallic iron increases with rising magnetic fieldMagnetic field intensity. At a magnetic fieldMagnetic field intensity of 1.0 T and a reduction time of 60 min, the average particle size of metallic ironMetallic iron reached 26.95 μm, which is 2.26 times larger than that achieved without a magnetic fieldMagnetic field (B-0.0 T). Kinetic fittingKinetic fitting using the Avrami-Erofeyev model revealed that the nucleation rate under B = 1.0 T increased nearly tenfold; While the growth rate increased nearly 30-fold compared to B = 0.0 T. This work demonstrates the promoting effect of magnetic fieldsMagnetic field on the reduction process of iron oxides, providing valuable insights for exploring the mechanism of magnetically enhanced reduction and understanding the interaction mechanismInteraction mechanism of magnetic fieldsMagnetic field.