The structure of a 34t tundish has been studied and optimized by 1: 3 water model and orthogonal test with orthogonal table Ll6 (45). Results showed that the main primary and second sequence of tundish structure was height of weir
distance between dam and long nozzle
distance between weir and dam
and depth of dam; the optimum structure combination was height of weir 135 mm
depth of dam 90 mm
distance between weir and dam 155mm and distance between dam and long nozzle 195 mm. As compared with original tundish structure the comprehensive score of optimized structure increased to 91. 01 from original 74. 32.