theoretical mold heat removal(量: An expected minimum shell thickness at mold exit of 19. 4mm for a cast speed of 1. 5m/min was considered as the basis for calculation of theoretical mold heat removal (MHR). 拉坯速度1.5 m/min, 结晶器出口处最低坯壳厚度期望值为19.4 mm 曾被认为是计算结晶器理论散热量的依据。)