摘要
钢包长水口吹氩采用最佳的流量控制策略,能有效避免中间包浇注过程中出现钢液二次氧化、卷渣和热量损失等负面影响,同时,能充分发挥气泡去除夹杂物的作用。为此,提出钢包长水口吹氩自动控制系统,通过S7-300PLC采集数据及软件编程,根据开浇、连浇等因素在线调节吹氩流量,在此基础上运用PID控制算法和闭环控制机制实时调整流量控制阀,保证流量实际值与设定值偏差最小。此系统在某特钢厂2021年第1季度生产数据表明,各钢种连铸坯酸溶铝(Al;)损失百分比小于10%的炉数比例上升了5.52%,Al;损失百分比大于60%的炉数比例由1%下降为0。实际应用结果表明,该系统提高了连铸坯表面质量及最终成品性能。
Argon blowing at the ladle shroud requires the best flow control strategy to effectively avoid the secondary oxidation of molten steel, slag entrapment and heat loss during the casting of the tundish, and at the same time, give full play to the role of bubbles to remove inclusions. Therefore, an automatic control system for argon blowing at the ladle shroud was proposed. The data collected by S7-300 PLC and software programming were used to adjust the argon blowing flow online in real time according to factors such as pouring and continuous pouring. On this basis, PID control algorithm and closed-loop control mechanism were used for real-time adjustment. The flow control valve ensures the minimum deviation between the actual value of the flow and the set value. The production data of this system in the first quarter of 2021 in a special steel plant show that the proportion of furnaces with an acid soluble aluminum(Al;) loss percentage of less than 10% of each steel grade has increased by 5.52%, and the proportion of furnaces with an Al;loss percentage of more than 60% has increased from 1% decrease to 0. The actual application results show that the use of the system improves the surface quality of the continuous casting slab and the performance of the final product.
作者
程瑾琦
张立强
伏凯旋
赵傲南
CHENG Jinqi;ZHANG Liqiang;FU Kaixuan;ZHAO Aonan(College of Metallurgical Engineering,Anhui University of Technology,Ma′anshan 243000,Anhui,China)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2022年第6期562-570,共9页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(U1760108,51874001)。
关键词
连铸
钢包长水口
氩封
保护浇注
自动控制
continuous casting
ladle shroud
argon seal
protection pouring
automatic control
