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<p>A static model was developed to investigate the generation of hydrogen-enriched reducing gas through pulverized coal injection (PCI) in the dome zone of the COREX melter gasifier. The results indicated that PCI in the dome zone increases the volume of generator gas from 1325.7 to 1481.8 m<sup>3</sup>/t, with CO and H<sub>2</sub> content rising from 76.4 to 81.7%. Carbon consumption for direct reduction is reduced to 75.4 kg/t, a 30.7% decrease compared to conditions without PCI. Additionally, the direct reduction degree decreases from 0.53 to 0.37, while the metallization rate of the shaft furnace increases from 0.32 to 0.44. As the PCI rate increases, the volume and CO and H<sub>2</sub> content of generator gas also increase. Under current operating conditions, the PCI rate should be limited to below 200 kg/t.</p> Graphical Abstract <p></p>

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Numerical Analysis of Generation of Hydrogen-Enriched Reducing Gas Through Pulverized Coal Injection in the Dome Zone of COREX Melter Gasifier

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Mingyuan Chen,
  • Heng Zhou,
  • Zhaocai Wang,
  • Wenchao Zhang,
  • Yapu Xing,
  • Mingyin Kou,
  • Shengli Wu

摘要

A static model was developed to investigate the generation of hydrogen-enriched reducing gas through pulverized coal injection (PCI) in the dome zone of the COREX melter gasifier. The results indicated that PCI in the dome zone increases the volume of generator gas from 1325.7 to 1481.8 m3/t, with CO and H2 content rising from 76.4 to 81.7%. Carbon consumption for direct reduction is reduced to 75.4 kg/t, a 30.7% decrease compared to conditions without PCI. Additionally, the direct reduction degree decreases from 0.53 to 0.37, while the metallization rate of the shaft furnace increases from 0.32 to 0.44. As the PCI rate increases, the volume and CO and H2 content of generator gas also increase. Under current operating conditions, the PCI rate should be limited to below 200 kg/t.

Graphical Abstract