Optimization of Submerged Nozzle and Chamfer Design in the Mold of Bloom Continuous Casting Process Using Numerical Simulation

Bloom continuous castingBloom continuous casting is widely used in steel production. The flow state and liquid level fluctuationLiquid level fluctuation of molten steel inside the bloom continuous casting moldMold directly affect the quality of the bloom. In this study, numerical simulationsNumerical simulation are conducted with different immersion depths and side hole inclination angles of the submerged nozzleSubmerged nozzle during the bloom continuous castingBloom continuous casting process, and the F index is used to judge the liquid level fluctuationLiquid level fluctuation during the casting process. The results show that the optimal nozzle combinations are 100 mm submerged depth with 15° port angle and 110 mm submerged depth with 15° port angle, when the continuous casting speed is 0.55 m/min. The flow field of the molten steel in the moldMold is appropriate, and the narrow surfaces are less impacted. Also, the fluctuation of the liquid level is appropriate. This method can be emulated to optimize the moldMold parameters in most steel production processes. In addition, as the chamfer decreases, the heat flux density at the corners continues to increase.