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Correlation Between Reduction Degree and Softening and Melting Properties of Pellets

  • Yu-Zhu Pan
  • Ai-Jun Zhang
  • Lin Lin
  • Jing-Song WangEmail author
  • Huai-Xuan Feng
  • Qing-Shan Lin
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

With increasing application of oxygen-enriched or even oxygen blast furnace ironmaking technologies, more intensive indirect reduction, followed by softening and melting, of iron ore pellets may take place in the blast furnace. In this study, the correlation between reduction degree and softening and melting properties of pellets was investigated. The results showed that with the increased of the reduction degree, the softening start temperature (Ts) of pellets did not change significantly and melting start temperature (Tm) obviously increased. The dropping temperature of the pellets slightly increased with the reduction degree of the pellets increase. Since the increased temperature range of the softening zone interval (ΔTS/°C) of the pellet was greater than the reduced temperature range of the melting zone interval (ΔTM/°C), the range of the cohesive of the pellet was increased. The permeability of the pellets was obviously improved as the reduction degree increased. This study provided important guidance for blast furnace production under high reduction degree conditions.

Keywords

Blast furnace Reduction degree Pellets Cohesive zone Permeability 

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Yu-Zhu Pan
    • 1
  • Ai-Jun Zhang
    • 2
  • Lin Lin
    • 3
  • Jing-Song Wang
    • 1
    Email author
  • Huai-Xuan Feng
    • 1
  • Qing-Shan Lin
    • 1
  1. 1.State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingBeijingChina
  2. 2.Yong Feng GroupQiheChina
  3. 3.School of Energy and Environmental EngineeringUniversity of Science and Technology BeijingBeijingChina

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