Abstract: The flow field and temperature field of induction heating tundish for large round bloom in a special steel plant were numerically simulated. The purpose is to reveal the transmission law of flow field and temperature field in tundish, and to guide the production and optimize the process of channel induction heating tundish. The results show that the average residence time of molten steel after induction heating in tundish is 40 s higher than that before heating, and the average dead zone volume is 3.3 percentage points lower than that before heating. The flow field of tundish is more stable after induction heating. Through the analysis of the transient temperature field and flow field, it can be found that the temperature field after induction heating is relatively stable as a whole, the temperature at each level is uniform, the disturbance in the tundish is small, the speed is slow, and there is no obvious eddy current phenomenon, indicating that it will not cause slag entrapment. The larger the excitation current is, the more obvious the induction heating effect is. By designing a reasonable power supply gear, low superheat constant temperature casting can be achieved.

Key words: induction heating；big round bloom；RTD curve；flow field；temperature field