凝固末端动态轻压下技术是减少甚至消除连铸坯中心偏析与疏松的有效手段。本文以攀钢2号大方坯连铸机为研究对象，研究开发了大方坯动态轻压下控制模型，提出了轻压下实施过程中各拉矫机压下辊设定值的计算方法。模型投产应用后，生产铸坯质量得到较大改善，其中中心偏析、中心疏松等内部缺陷评级≤1.0级综合比例达到99.03%。

The dynamic soft reduction technology is the effective method to reduce and even eliminate the centerline looseness and segregation of continuous casting strands. In the present paper, a bloom dynamic soft reduction control model was studied and developed for No.2 bloom continuous casting machine in Panzhihua steel, and the gap values calculation method for the press rolls of withdrawal and straightening machines during the process of soft reduction was presented. The model application results show that quality of the blooms has been improved obviously, and the integrated qualified rate of blooms central segregation and central looseness defects class ≤1.0 is up to 99.03%.