单点非平衡异型坯连铸配水优化的数值模拟  

Numerical simulation of water distribution optimization of single point non-equilibrium beam blank in continuous casting

作　　者：徐宇 张峻纲 林小祥 武鸿杰 周俐 XU Yu;ZHANG Jun-gang;LIN Xiao-xiang;WU Hong-jie;ZHOU Li(School of Metallurgical Engineering,Anhui University of Technology,Ma'anshan 243002,Anhui,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243002

出　　处：《中国冶金》2022年第4期77-83,93,共8页China Metallurgy

摘　　要：某钢厂超薄异型坯BB2(750 mm×370 mm×90 mm)断面在单点非平衡浇注对称冷却模式下,连铸过程中铸坯存在表面温度不均匀和坯壳生长不一致等问题,为改善这些问题,采用数值模拟方法对原水表进行优化。优化后的结果表明,窄面中心两侧沿拉坯方向温度差值由原来的25~110 K下降到10~50 K,降低到原来的50%以下;窄面中心两侧沿拉坯方向坯壳厚度差值在出结晶器后由原来的3.3~7.4 mm下降到0.4~3.8 mm,降低了50%左右,改善效果明显。Under the symmetrical cooling mode of single point non-equilibrium pouring,the surface temperature of ultra-thin beam blank BB2(750 mm×370 mm×90 mm)section in a steel plant is uneven and the growth of billet shell is inconsistent during continuous casting.In order to improve these problems,the raw water meter was optimized by numerical simulation method.The optimized results show that the temperature difference along the drawing direction on both sides of center at narrow surface decreases from 25-110 K to 10-50 K,which decreases over 50% than before.The thickness difference of the shell along drawing direction at both sides of center at narrow surface decreases from the original 3.3-7.4 mm to 0.4-3.8 mm after leaving the mold,which is about 50% less,and the improvement effect is obvious.

关 键 词：异型坯 单点浇注 配水 温度场 坯壳生长 

分 类 号：TF777[冶金工程—钢铁冶金]