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连铸板坯结晶器流场的数值模拟
Numerical Simulation of Flow in Mold for Continuous Casting Slab
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- DOI:
- 作者:
- 郝赳赳 1，2
HAO Jiujiu1,2
- 作者单位:
- 1. 山西工程职业学院 冶金与环境工程系，山西 太原 030009; 2. 北京科技大学 冶金与生态学院，北京 100083
1. Department of Metallurgy and Environmental Engineering, Shanxi Engineering Vocational College, Taiyuan 030009, Shanxi, China. 2.School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083, China
- 关键词:
- 连铸板坯；数值模拟；结晶器流场；表面流速；浸入深度
continuous casting slab; numerous simulation; mold flow; surface velocity; immersion depth
- 摘要:
- 板坯结晶器液面流速对保护渣熔化、坯壳均匀性都有着较为重要的影响。 使用瞬态数模模拟的方法对板坯
结晶器内钢液流动进行研究，通过对比结晶器液面平均流速，评价了不同参数对结晶器流场的影响。 结果表明，水口倾
角由 20°将至 10°时，表面流速平均值由 0.192 m/s 增加至 0.211 m/s，表面流速提高，有利于保护渣的熔化和流场的稳
定，水口最佳倾角为 10°。 水口浸入深度由 100 mm 增加到 140 mm 时，表面流速从 0.215 m/s 降至 0.189 m/s，应避免水
口在较深的浸入深度下长时间停留。 椭圆形出口要优于正方形出口。
The surface flow rate of slab mould has an important effect on the melting of protective slag and the uniformity of slab shell. The flow of molten steel in slab mould was studied by transient numerical simulation method, and the influence of different parameters on the flow field of mould was evaluated by comparing the average flow velocity of mould surface. The results show that the average surface velocity increases from 0.192 m/s to 0.210 m/s when the nozzle angle increases from 20° to 10°. The increase of surface velocity is conducive to the melting of protective slag and the stability of flow field. The optimal nozzle angle is 10°. When the nozzle immersion depth increases from 100 mm to 140 mm, the surface flow rate will decreases from 0.215 m/s to 0.189 m/s. Therefore, the nozzle should be avoided to stay for a long time under the deeper immersion depth. Oval nozzle is better than square nozzle.