ABSTRACT

During continuous casting, some amount of metal is left in the tundish at the end of the casting sequence to avoid slag entrapment into continuous casting mould. This tundish loss often called as skull loss. It reduces the caster yield and is directly related to the size of the tundish. JSW Steel operates with 44 T, 8 strand billet caster tundish which had ~7T tundish loss under previous operational practice. Water modelling studies were carried out using a 0.25 scale model to design a new tundish bottom to reduce tundish skull loss. Three different tundish bottom configurations were studied and the corresponding effect on tundish flow profile and vortex formation was also investigated. Based on water modelling results, the optimized tundish design was used for plant trials. A 47% reduction in skull loss was obtained with no adverse effect on steel cleanliness from different strands.

摘要

在连铸过程中，在浇铸顺序结束时，中间包中会留有一定量的金属，以避免熔渣进入连铸模具。这种中间包损失通常称为头骨损失。它降低了连铸机的产量，并且与中间包的尺寸直接相关。JSW Steel 使用 44 T、8 流坯连铸机中间包，在之前的操作实践中，中间包损耗约为 7T。使用 0.25 比例模型进行水建模研究，以设计新的中间包底部以减少中间包颅骨损失。研究了三种不同的中间包底部配置，并研究了对中间包流动剖面和涡流形成的相应影响。根据水模拟结果，优化的中间包设计用于工厂试验。