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Investigation of Liquid/Solid Slag and Air Gap Behavior inside the Mold during Continuous Slab Casting

机译：板坯连铸过程中结晶器内液/固渣和气隙行为的研究

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The mold flux fundamentally determines solidification and friction by controlling heat transfer and lubrication within the mold, and it results in dominating the formation of various primary cracks. It is critical to reveal the distribution and evolution of the slag layers and the air gap, especially for control and optimization of the initial slab surface defects. Based on the measured temperatures in combination with the inverse heat transfer numerical model, this paper establishes a numerical model which describes the distribution of the slag layers and the air gap in the mold, aiming to calculate the non-uniform distribution of liquid slag, solid slag air gap and their evolution during actual casting process. The effect of slag solidification temperature and casting temperatures on the slag layers and air gap is investigated, and the liquid lubrication length, air gap formation position and evolution of the slag layers are also analyzed quantitatively. The results provide reference for deepening the understanding of complicated distribution and evolution of mold flux, and may lay the theoretical foundation for online visualization of non-uniform heat transfer and lubrication behavior inside the continuous casting mold.
机译：铸模助熔剂通过控制铸模内的传热和润滑从根本上决定固化和摩擦，并导致形成各种主要裂纹。揭示炉渣层和气隙的分布和演变至关重要，特别是对于控制和优化初始板坯表面缺陷而言。基于实测温度，结合逆向传热数值模型，建立了描述渣层分布和结晶器气隙的数值模型，以计算液态渣，固体的不均匀分布。渣气隙及其在实际铸造过程中的演变。研究了炉渣凝固温度和铸造温度对炉渣层和气隙的影响，并定量分析了液润滑长度，气隙形成位置和炉渣层的演变。研究结果可为加深对结晶器熔剂的复杂分布和演变的理解提供参考，并可为在线可视化连续铸造结晶器内部非均匀传热和润滑行为奠定理论基础。

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