Molten steel level stability in continuous casting slab mold under electromagnetic stirring

作     者：WEN Hongquan WU Cunyou ZHOU Yueming 

作者机构：Research InstituteBaoshan Iron & Steel Co.Ltd. 

出 版 物：《Baosteel Technical Research》 (宝钢技术研究（英文版）)

年 卷 期：2019年第13卷第1期

页      面：25-31页

学科分类：0806[工学-冶金工程] 08[工学] 

主　　题：level stability free flow jet electromagnetic stirring F -index continuous casting mold 

摘      要：Fluctuation of molten steel level in continuous casting process is a critical issue. The analytic function for the liquid steel surface stability index( F) of the continuous casting slab mold under the action of electromagnetic stirring was derived. The effects on the F value of the electromagnetic field,casting mold,submerged entry nozzle,and casting speed were observed,and the stability of the process parameters of a practical continuous casting system was evaluated. The main results generated are as follows:①Based on the free flow jet theory,a formula is established for the level stability index of continuous casting slab mold under electromagnetic stirring.②According to the results of calculation,the various parameters in decreasing order of the magnitude of their influence are magnetic flux density,nozzle submersion depth,casting speed,slab width,stirring current frequency,and nozzle side-hole inclination angle.③For practical continuous casting with a slab thickness of 230 mm,the calculated F values are between 3 and 5 for different matches between slab width and casting speed,but the parameter optimization space is much larger for wider slab widths and lower casting speeds.