Physical Modeling Research on Structural Optimization of Four-strand Billet Tundish

The flow field and RTD curves in a tundish for four-strand round billet tundish with different structural baffles were simulated by the test of physical model with 1:3 geometric similarity scale. The results show that the average residence time of liquid steel in the tundish prolongs and the inclusion removal improves when the U-shape baffles is used in the tundish. But the response time of two side outlet have a great difference. Y-shape ba- ffle is the better than U-shape baffles, which can change the fluid flow in the tundish efficiently and improve inclusion removal, can satisfactorily obtain the flow synchronism between outlets, and effectively reduce the dead area volume fraction, increase the plug volume fraction.