A New Method to Determine the Theoretical Reduction Amount for Wide-thick Slab during the Mechanical Reduction Process

  • Chenhui Wu Pangang Group Research Institute Co., Ltd.
  • Jian-hua Zeng Pangang Group Research Institute Co., Ltd.
  • Guo-rong Wu Pangang Group Research Institute Co., Ltd.
  • Xin Xie
  • Min Zhang
Keywords: theoretical reduction amount; mechanical soft reduction; continuous casting; wide-thick slab; non-uniform solidification

Abstract


Mechanical soft reduction (MSR) is an effective method to eliminate the centerline segregation and porosity of the continuous casting steel, and the reduction amount is a key parameter that determines whether the MSR could be applied successfully. In the present work, a 2D heat transfer model was developed for predicting the non-uniform solidification of the wide-thick slab. The measured shell thickness by nail shooting experiment and the measured slab surface temperature by infrared camera were applied to validate the 2D heat transfer model. A new calculation method of theoretical reduction amount that could consider the influence of non-uniform solidification of the wide-thick slab was then derived. Based on the predicted temperature field by the 2D heat transfer model and the newly-proposed calculation method, the required theoretical reduction amount and reduction gradient/rate for the wide-thick slab were calculated and discussed. The difference between the newly-proposed method and the previous method, the influence of the casting speed and slab thickness on the required theoretical reduction amount and reduction gradient/rate were also investigated.

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Published
2021/02/28
How to Cite
Wu, C., Zeng, J.- hua, Wu, G.- rong, Xie, X., & Zhang, M. (2021). A New Method to Determine the Theoretical Reduction Amount for Wide-thick Slab during the Mechanical Reduction Process. Journal of Mining and Metallurgy, Section B: Metallurgy, 57(1), 125-136. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/27197
Issue
Vol. 57 No. 1 (2021)
Section
Original Scientific Paper

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