To clarify the effects of Si concentration, temperature, and time on melting of the silicon steel, three silicon steels with different Si concentrations were used to conduct an experimental investigation of the melting of scrap cylinders under natural convection. Thermodynamics and kinetics of scrap cylinder melting were revealed and analyzed based on the experimental results. Carbon diffusion between the cylinders and hot metal during melting was modeled using Thermo-Calc 2017b software to evaluate the mass-transfer coefficients. Results showed that a higher Si concentration and lower melting temperature led to slower melting of the silicon steel scrap cylinder. The mass-transfer coefficient of C during the melting decreased with an increase of Si concentration. At 1623 K (1350 °C), the mass-transfer coefficients were 1.322 × 10−4, 0.436 × 10−4, and 0.142 × 10−4 m s−1 for low (0.30 mass pct), medium (1.58 mass pct), and high (3.21 mass pct) Si concentrations in the scrap cylinders, respectively; at a melting temperature of 1723 K (1450 °C), the values of the respective mass-transfer coefficients were 1.370 × 10−4, 0.613 × 10−4, and 0.289 × 10−4 m s−1.

中文翻译：

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硅浓度对铁水中废钢熔化行为的影响

为阐明Si浓度、温度和时间对硅钢熔化的影响，采用三种不同Si浓度的硅钢对自然对流下废钢瓶熔化进行了实验研究。根据实验结果揭示和分析了废钢瓶熔化的热力学和动力学。使用 Thermo-Calc 2017b 软件对熔化过程中圆柱体和铁水之间的碳扩散进行建模，以评估传质系数。结果表明，较高的Si浓度和较低的熔化温度导致硅钢废料圆筒的熔化较慢。C在熔化过程中的传质系数随着Si浓度的增加而降低。在 1623 K (1350 °C) 时，传质系数为 1.322 × 10−4、0.436 × 10−4、和 0.142 × 10-4 ms-1 分别用于废钢瓶中的低（0.30 质量 pct）、中（1.58 质量 pct）和高（3.21 质量 pct）Si 浓度；在 1723 K (1450 °C) 的熔化温度下，各自的传质系数值为 1.370 × 10-4、0.613 × 10-4 和 0.289 × 10-4 ms-1。