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Flow behavior of molten steel during fewer strands casting of six-strand bloom |
WANG Xian-yang1,2, HU Hao1,2, XIE Xin2, WU Chen-hui2, LONG Mu-jun1, CHEN Deng-fu1 |
1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 2. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000,Sichuan,China |
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Abstract In continuous casting, it is common to close single or multiple nozzle of multi-strands tundish in order to adapt to production rhythm due to insufficient molten steel or equipment failure. However, the closure of the nozzle will change the flow field in the tundish and further affect the removal efficiency of inclusions in the tundish. For this reason, based on numerical simulation, the flow behavior of molten steel and the removal of inclusion in tundish with different nozzle closed were studied, and the optimal nozzle closing scheme was obtained, which provided a basis for the selection of nozzle closing in tundish. The results show that the volume of dead zone in tundish increases slightly when the first casting is turned off, and the effect of turning off the first casting on the removal of inclusion in tundish is minimal. The removal rates of 10, 30, 50, 70 and 90 μm inclusions changed from 12.4%, 39.1%, 74.2%, 93.3% and 95.6% to 14.7%, 36.4%, 76.4%, 85.3% and 93.8%, respectively.
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Received: 28 January 2022
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