板坯连铸动态二冷配水技术的工业应用

Industrial Application of the Dynamic Secondary Cooling Technology for Slab Continuous Casting

基于耦合多元合金两相区凝固模型的板坯连铸凝固传热数学模型和恒间距切片单元跟踪方法,开发了板坯连铸动态二冷配水软件平台,其中内嵌二冷分区有效拉速和目标表面温度曲线两种控制模式,前者充分考虑了铸坯的冷却历史,后者则关注对铸坯表面温度沿铸流方向的合理控制,在实际生产中可以方便灵活地加以选择应用。该技术控制功能丰富、安全机制完善、系统运行稳定、人机界面友好,具有较强的现场适应性,目前已成功应用于重钢长寿新区一号板坯连铸机,在板坯表面及内部质量的控制方面取得了良好的冶金效果,具备较好的工业应用实用价值和推广前景。

Based on the solidification ＆ heat-transfer mathematical model of slab continuous casting coupled with the multi-alloy microseg- regation model and the tracking method with slice elements in constant interval, the CISDI dynamic secondary cooling software platform has been developed, which comprises oftwo control modes, via., the effective casting speed ofsecondary cooling zones, and the targeted surface temperature curve of slab, as for them, the former one takes full considerations about the cooling history of slab, and the latter one takes emphasis on the reasonable control of slab surface temperature along casting direction, both can be chosen to apply in actual casting process conveniently and flexibly. This technology has abundant control function, all-around safety mechanism, stable running system, friendly operating interface, and good industrial adaptability, which has been put into use successfully on the No. 1 slab caster of Chongqing Steel Plant, and has obtained good metallurgical effects for control of slab surface/internal quality. So, it has great industrial practical value, and can be put into practice widely.