Optimization of asymmetric flow field and temperature field of ultra-thin and large section beam blank mould
LI Si-jun1, PENG Yong-xiang1, LI Ping1, NING Wei2, DU Jin-ke1, FU Chang-wei1
1. Technology Center, Laiwu Branch of Shandong Iron and Steel Co., Ltd., Laiwu 271104, Shandong, China; 2. Steelmaking Plant, Laiwu Branch of Shandong Iron and Steel Co., Ltd., Laiwu 271104, Shandong, China
Abstract:A 0.7∶1 hydraulic test model was established to optimize the nozzle structure to improve the flow field of ultra-thin large section blank, and the three-dimensional flow field and temperature field of molten steel in the mold and its secondary cooling section were numerically simulated under actual production conditions. It was showed that the flow field distribution in the existing through nozzle mould was extremely asymmetric and the response time of each position of the mould was quite different, resulting in the uneven distribution of temperature and composition in the mold. The optimized three-side hole and one bottom-hole nozzle effectively solves the problem of long and inconsistent response time at different positions of the mould and improves the serious asymmetric flow field during single-point straight-through nozzle pouring. The temperature difference between the pouring side and the non pouring side is significantly reduced, and the temperature change along the drawing direction is also more reasonable, which is conducive to the formation of a good solidified shell. This process provides guidance for actual production.
李四军, 彭永香, 李萍, 宁伟, 杜金科, 付常伟. 超薄大断面异型坯结晶器非对称流场和温度场的优化[J]. 连铸, 2021, 40(6): 9-16.
LI Si-jun, PENG Yong-xiang, LI Ping, NING Wei, DU Jin-ke, FU Chang-wei. Optimization of asymmetric flow field and temperature field of ultra-thin and large section beam blank mould. CONTINUOUS CASTING, 2021, 40(6): 9-16.
ZHANG L L,CHEN D F,LONG M J,et al. Study on the fluid flow in a semi- open- stream- poured beam blank continuous casting mold with submerged refractory funnels by multiphase modeling[J]. Metals,2016,6(5):104.
[3]
ZHU D,CHUN T,PAN J,et al. Influence of basicity and MgO content on metallurgical performances of brazilian specularite pellets[J]. International Journal of Mineral Processing,2013,125:51.