Based on the prototype of 30 t tundish in a steelworks a " belly" induction heating tundish with single channel to reduce the erosion of the wall of tundish has been designed. The flow behavior of liquid steel of the " belly" induction heating tundish is studied by numerical simulation method

and the influence of the volume of the front cavity on the flow state of liquid steel is investigated. The results show that "belly'' can significantly reduce the erosion of the wall of tundish posterior cavity

the average residence time of the " belly" tundish is prolonged by 3. 83% ~ 6. 44%

and the dead zone volume decreases by 5. 6% ~5. 93% ； as the front cavity volume is 1. 06 m

3

the average residence time of liquid steel is the longest； as the nozzle flow of tundish is 150 kg/min and 200 kg/min

the longest average residence time is 678 s and 569 s respectively and the minimum proportion of dead zone volume is 5. 87% and 0. 55% respectively./p>