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The cooling staveCooling stave faces extreme environmentsExtreme environments such as high temperatureHigh temperature, high pressure, and wear, and its lifetime directly affects the stability of the blast furnace. Through the research of 141 offline cooling stavesCooling stave in the 5500 m3 blast furnace, the damage characteristicDamage characteristic and failure mechanismFailure mechanism of cooling staveCooling stave were analyzed and suggestions were proposed for the longevity of the cooling stavesCooling stave. Statistics and analysis were conducted from the perspectives of lifetime, morphologyMorphologies, thickness, and deflection. The damage to the cooling staveCooling stave presents a concentrated and longitudinally connected characteristic. It was found that the failure of cooling stavesCooling stave is mainly caused by the combined effects of wear and high-temperatureTemperature stress corrosionCorrosion, and especially when the water channels are damaged and the cooling is insufficient, the cooling stavesCooling stave will accelerate damage. The protective refractory materials on surface can effectively delay the failure of cooling stavesCooling stave.

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Research on Failure of Offline Cooling Staves in 5500 m3 Blast Furnace

  • 会议论文

  • 发表日期：

    2025年

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  • Zefei Zhang,
  • Yanbo Chen,
  • Jianlong Wu,
  • Kexin Jiao,
  • Songjian Shan,
  • Long Chen,
  • Kunpeng Huang,
  • Hongwei Li,
  • Yong Zhang,
  • Jian Sun

摘要

The cooling staveCooling stave faces extreme environmentsExtreme environments such as high temperatureHigh temperature, high pressure, and wear, and its lifetime directly affects the stability of the blast furnace. Through the research of 141 offline cooling stavesCooling stave in the 5500 m3 blast furnace, the damage characteristicDamage characteristic and failure mechanismFailure mechanism of cooling staveCooling stave were analyzed and suggestions were proposed for the longevity of the cooling stavesCooling stave. Statistics and analysis were conducted from the perspectives of lifetime, morphologyMorphologies, thickness, and deflection. The damage to the cooling staveCooling stave presents a concentrated and longitudinally connected characteristic. It was found that the failure of cooling stavesCooling stave is mainly caused by the combined effects of wear and high-temperatureTemperature stress corrosionCorrosion, and especially when the water channels are damaged and the cooling is insufficient, the cooling stavesCooling stave will accelerate damage. The protective refractory materials on surface can effectively delay the failure of cooling stavesCooling stave.