Liquid core control method for slab continuous casting machine

• Main Authors: LIU QIAN, ZHENG YAWEN, YUAN GUANGPENG, QIAN ZHIYOU, GU HONG, DENG JUNZONG, FENG GUOHUI, LIU ZHAOJING
• Format: Patent
• Language: Chinese; English
• Published: 12.07.2024
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention discloses a method for controlling a liquid core of a slab continuous casting machine, which comprises the following steps of: by taking a fan-shaped section roll gap as a control means, carrying out PLC (Programmable Logic Controller) programming, lifting or pressing a local fan-shaped section before a casting blank is solidified, increasing or decreasing the roll gap according to a set value, carrying out static or dynamic circulating adjustment, controlling a solidified blank shell to bulge or compress, and enabling the liquid core to flow or extrude; and finally, the non-uniform degree of a liquid core is reduced, the segregation index of a solidification end point is reduced, and the segregation uniformity in the width direction is improved, so that the performance of the steel plate core is improved. 本发明公开一种板坯连铸机液芯控制方法，以扇形段辊缝为控制手段，通过PLC编程，在铸坯凝固前，通过抬起或压下局部扇形段，使辊缝按设定值增大或减小，静止或动态循环调整，控制凝固坯壳鼓肚或压缩，使液芯产生流动或挤压，最终减少液芯的不均匀程度，降低凝固终点偏析指数，提升宽度方向偏析均匀性，从而改善钢板芯部性能。