关键词: 中间包, 流场, 数值模拟, 效益

Abstract: The temperature field and flow field of the tundish before and after improvement were analysied by numerical simulation.The reformed tundish has the advantages as below ：1) the maximal temperature difference of liquid steel in the vertical direction of tundish between different nozzle is reduced from 4.11 ℃ to 1.44 ℃ and the temperature of liquid steel in tundish is more homogenized，2) the maximal temperature difference of liquid steel between the different exit of tundish is reduced from 2.42 ℃ to 0.78 ℃，that means the casting operation still can be smooth when the temperature of liquid steel into tundish is reduced by 1.64 ℃, 3）the capacity of tundish is changed from 35 t to 40 t and retention time of liquid steel in the tundish is increased from 8.6 min to 9.7 min , that is good for inclusion removing，4)the velocity gradient of liquid steel in the flow field is so small that the impact energy can be dissipated , the souring of the tundsh refractory is decreased，5) the velocity and temperature field is so reasonable that the souring of the refractory in the bottom and the side between 0 to 0.4 m is decreased greatly，6)the product cost of molten steel is decreased by 0.46 yuan per ton.

Key words: tundish, flow field, numerical simulating, benifit