Numerical Simulation on Flow Control Device Optimization of Five Streams L-type Tundish

The flow field of one of the tundish of ten-machine ten-strand caster from a local steel plant was optimized. Seven programs were proposed to numerically simulate the flow field in tundish. The results indicate that liquid steel in tundish shows poor flow conditions and poor consistency, and the dead volume of tundish is relatively large without tundish flow control devices. The flow of liquid steel can be significantly improved when adding turbulence suppressors, retaining walls and dams into the tundish. Moreover, the program of turbulence suppressor+3 holes(a hole with 25° inclination in the upper row and two holes with 30° inclination in the lower row) D1dretaining wall + D2retaining wall + retaining dam B is the best of all, which makes the maximum difference of five streams average residence time of liquid steel flow reduce to 174.2 s, and the overall average residence time is increased by 202.9 s, and the dead volume ratio decreases to 20.6%.