Effect of Impact Stress Distribution and Parameter Optimization of Tundish Weir

To address the critical problem of erosion and rupture in the tundish weir, this study employs numerical simulation to systematically explore the effects of casting speed, the distance between the weir and the long nozzle, and the distance between the weir bottom and the tundish bottom on upstream impact stress distribution. An optimization strategy to mitigate weir impact stress is proposed. The results show that the impact stress on the weir upstream surface increases with casting speed. A greater distance between the weir and the long nozzle significantly increases the average impact stress at the upstream bottom, while a larger distance between the weir bottom and the tundish bottom gradually decreases it. For the 65-ton two-strand slab tundish, under the conditions of the casting speed being 1.5 m/min, the distance between the weir and the long nozzle being 1 200 mm, and the distance between the weir bottom and the tundish bottom being 300 mm, the impact stress on the upstream surface of the weir is minimized, the average residence time of molten steel in the tundish is extended, and the metallurgical performance of the tundish is significantly improved.