摘要
针对某2 250 mm常规热轧带钢产线对于生产效率提升的迫切需求,分析了制约其生产效率的关键环节,并提出了相应的优化方法,取得了良好的改善效果。通过优化辊道L1级控制逻辑,并在交接辊道新增L1级HMD信号实现L2级逻辑跟踪的移动,减少了粗轧咬钢时间间隔;通过细化粗轧各道次压下参数层级和提高穿带速度,实现了粗轧生产效率的提升;进一步,通过开发精轧连续穿带自动控制功能、层流冷却防追尾功能,提高了轧制效率和稳定性,同时优化了精轧动态控制程序,解决了精轧出口温度与卷取温度动态控制失效的问题;最后通过中间坯冷却的设备改造和自动化程序开发,减少了精轧前摆钢。生产实际表明:平均轧制节奏由146 s降低至107 s,生产效率提升了26.71%。
Aiming at the urgent need for production efficiency improvement of a conventional 2250 mm hot strip rolling line,the key links that restrict the production efficiency were analyzed,corresponding optimization methods were proposed,and good improvement results were obtained.By optimizing the L1 control logic of the roller table and adding HMD to the handover roller table,the L2 logic tracking movement was realized,the biting time interval of roughing rolling was reduced.The production efficiency of roughing rolling was improved by refining the reduction parameter level of each pass of roughing rolling and improving the threading speed.Further,through the developments of automatic control function for the continuous threading of finishing rolling and the laminar cooling to prevent rear-end collision,the rolling efficiency and stability were improved,the dynamic control program of finishing rolling was simultaneously optimized,and the problem of dynamic control failure of finishing rolling outlet temperature and coiling temperaturew was solved.Finally,through the equipment reformation and automatic program development of intermediate billet cooling,the time for stopping strip feeding before finishing rolling was reduced.The practical production show that the average rolling rhythm is reduced from 146 s to 107 s,and the production efficiency is increased by 26.71%.
作者
黄瑞坤
郭德福
王刚
易文
廖钢
HUANG Ruikun;GUO Defu;WANG Gang;YI Wen;LIAO Gang(Hunan Iron and Steel Co.,Ltd.,Loudi 417000,China)
出处
《轧钢》
2023年第3期85-91,共7页
Steel Rolling
关键词
常规热轧带钢产线
生产效率
加热炉
粗轧
精轧
层流冷却
中间坯冷却
conventional hot strip rolling line production efficiency
heating furnace
roughing rolling
finishing rolling
laminar cooling
intermediate billet cooling
