Optimization of retaining wall for four stream large round billet tundish
JIANG Ye1, LI Ming1,2, WU Jianyong1, MAO Naixu1, SONG Sicheng2, SUN Yanhui2
1. Special Steel Business Unit, Nanjing Iron and Steel Co., Ltd., Nanjing 210044, Jiangsu, China; 2. Collaborative Innovation Center,Steel Technology, University of Science and Technology Beijing,Beijing 100083, China
Abstract：In order to solve the problem that the quality of the casting billet in the middle two strands is significantly lower than that in the edge two strands during poor production conditions in a steel plant, improve the consistency of each strand in the tundish, and reduce the proportion of dead zones in the tundish, we designed three methods on the same retaining wall, and obtained the time residence distribution (RTD) curves of each scheme through water model physical experiments. After analyzing the RTD curves, the corresponding proportions of dead zone, piston flow zone, and fully mixed flow zone for each scheme were obtained. At the same time, taking into account the peaks of the RTD curve and the consistency between various strands, the optimal production plan was obtained. The research results indicate that the B1 scheme with a single hole on the side has the best flow field, with an aperture of 140 mm and a vertical angle of 20°. The consistency between its two strands is very good, with a dead zone ratio of 19.95%, and the RTD curve has no peaks or double peaks.
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2024, Vol. 43 
