连铸管式结晶器变形的数值仿真与优化

Numerical simulation and optimization of continuous casting tube mold deformation

为了减小管式结晶器铜板变形,提高铸坯质量,建立钢液-铜管-冷却水的三维流动传热模型以及铜管应变模型,研究管式结晶器传热和形变特征,提出铜管优化方案。研究结果表明,铜管热面最高温度为500 K,最低温度为320 K,铜管角部60 mm区域的冷却水温度最低;铜管角部的变形量最大,角部和窄面中心向水缝侧变形,铜管宽面中心向钢液侧变形。通过在铜管角部增加铜质凸起,可显著减小角部变形量,同时对冷却能力影响不大,合适的凸起宽度为10~15 mm。

In order to reduce the deformation of copper plate in tube mold and improve the bloom quality, a three-dimensional flow heat transfer model with molten steel, copper tube and cooling water and the strain model with copper tube were established. The heat transfer and deformation characteristics of tube mold were studied, and the optimization for copper tube was put forward. The results showed that the highest temperature of hot face for copper tube was 500 K, and the lowest temperature was 320 K. The cooling water temperature in the 60 mm area of the corner for copper tube was the lowest. The deformation at the corner of copper tube was the largest. The corner and the center of the nawow surface deformed to the water slot, and the center of the wide surface deformed to molten steel. By adding a convexity at the corner of the copper tube, the deformation of the corner was significantly reduced while it had little affect on the cooling capacity, and the appropriate convexity width was 10-15 mm.