Prediction Model of Intermixing Slab Length and Location in Continuous Grade Transition Casting Process
异钢种连浇交接坯长度与位置预测模型

Taking the No.1 continuous caster of Chongqing Iron and Steel Co. as object, water model experiments were conducted to simulate the continuous grade transition casting process. The dimensionless concentration profiles along slab length with different continuous casting conditions were measured. The results show that increasing molten steel flow rate and reducing molten steel level in the tundish can both reduce the intermixing slab. In the ranges of molten steel flow rate and level in Chongqing Iron and Steel Co., the flow rate will make a 21% difference from dimensionless concentration at the same time, the molten steel level will make a 73% difference from dimensionless concentration at the same time. This proves that the molten steel level has a more significant impact on dimensionless concentration. Based on the profiles, a model was developed to predict the length and location of intermixing slab and make the model exactly by sampling. Comparison of predicted dimensionless concentration profile with plant data shows that the precision of the model can reach 95%, it is higher than the similar results in other literature.