关键词: 80t中间包, 300mm板坯, 尾坯, 卷渣, 数学模拟, 优化效果

Abstract: In order to reduce the rejection rate of tundish tailing slab, prevent the slag entrapment of liquid in tundish in tailing slab decreasing casting speed process,the effect of casting speed change during tailing slab casting process on turbulence slag entrapment of liquid in a 80 t tundish for No3 slab caster at steelworks has been studied,and the optimization of process of decreasing tailing slab casting speed is carried out by using fluid dynamics software FLUENT. The optimization scheme to decrease the tundish tailing slab casting speed is defined by analysis on the turbulent kinetic energy-time tracking curves in remain time course after each casting deceleration. Based on the original scheme the casting heel increases from 8 t to 10 t,the duration of casting at each casting speed shortens and the final casting closing-up operation increases from 0. 1 m/min to 0. 2 m/min to reduce the possibility of tailing slab slag entrapment and decrease the production cost, the time of tundish tailing slab casting duration saves by 266. 8 s and the amount of saving liquid is 5. 08 t. After using the optimized operation at 300 mmx2000 mm No3 slab caster the total amount of rejected tail slab per month decreases from 576.4 t to 139. 1 t.