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<p>Fiber optic sensor with Bragg Gratings (FBG) was employed as temperature sensors in continuous casting mold of molten steel. It is superior to conventional thermocouple that temperature profile along the direction of casting can be measured in more finely manner, depending on the number of gratings and interval between each grating. By installing two fiber optic sensors along the direction of mold thickness, heat flux across the copper plate could be obtained. The characteristics of the heat flux were examined in various ways, and the influence of magnetic field imposed by Electro-Magnetic device was discussed. An impinging point could be detected by FBG, and its presence and location were independently validated by Computational Fluid Dynamic (CFD) simulation. Effect of magnetic field strength, width of the casting mold, and depth of the SEN immersion were systematically analyzed. FBG can also be applied to detect possibility of solidified shell remelting by analyzing the heat transfer near the impinging point. The proposed technique can be further used in visualizing the molten steel flow in the casting mold.</p>

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Development of a Novel Method for Detecting Temperature and Heat Flux Distribution in Cu Mold During the Continuous Casting Process and Its Application to Analyzing Molten Steel Fluid Patterns Inside the Mold

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月8日

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  • Hyun-Jin Cho,
  • Seong-Yeon Kim,
  • Hyoung-Jun Lee,
  • Youn-Bae Kang

摘要

Fiber optic sensor with Bragg Gratings (FBG) was employed as temperature sensors in continuous casting mold of molten steel. It is superior to conventional thermocouple that temperature profile along the direction of casting can be measured in more finely manner, depending on the number of gratings and interval between each grating. By installing two fiber optic sensors along the direction of mold thickness, heat flux across the copper plate could be obtained. The characteristics of the heat flux were examined in various ways, and the influence of magnetic field imposed by Electro-Magnetic device was discussed. An impinging point could be detected by FBG, and its presence and location were independently validated by Computational Fluid Dynamic (CFD) simulation. Effect of magnetic field strength, width of the casting mold, and depth of the SEN immersion were systematically analyzed. FBG can also be applied to detect possibility of solidified shell remelting by analyzing the heat transfer near the impinging point. The proposed technique can be further used in visualizing the molten steel flow in the casting mold.