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| Structural optimization of tundish for 30 t symmetrical four-flow small round billet |
| LIU Yu-hang1,2, SONG Jing-ling3, ZHU Qing-gui3, LI Heng-hua3, NIU Liang3, YANG Shu-feng1,2 |
1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;
3. Steelmaking Branch, Hengyang Valin Steel Tube Co.,Ltd.,Hengyang 421001,Hunan, China |
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Abstract In order to optimize the 30 t symmetrical four-strand small round billet tundish in a steel plant, the tundish currently used in the steel plant is used as a prototype, on the basis of similarity principle, the internal flow control device of the tundish is optimized by water model simulation, and RTD curve of the tundish under different conditions is measured, and then calculate the peak time, dead zone ratio and other indicators of molten steel in the tundish. The results show that the metallurgical effect of the prototype tundish is not good. According to the optimization scheme, when two holes are opened on each side of the deflector, the optimal scheme is scheme 3. At this time, the proportion of the dead zone of the tundish is 10.96%. When opening a single hole, the preferred plan is scheme 18. At this time, the proportion of dead zone in the tundish is 8.74%. However, when the smelting of this tundish is completed, the amount of steel left in the tundish is large, and the economic cost is high. On the whole, it is the best to use the double-hole optimal solution.
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Received: 16 May 2022
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2023, Vol. 42 
