摘要
结晶器自动开浇控制系统是中国重型机械研究院股份公司(中国重型院)自主研发的我国首个高精度结晶器液面控制技术。该系统结晶器液面检测采用嵌入式电磁涡流液面传感器,沿结晶器宽度方向上距传感器中心线两侧200 mm处各设置一个探头,两个探头测量的平均值作为液面控制系统的输入参数。双探头结构的传感器测量钢液高度不受保护渣和钢种的影响。结晶器液面控制采用电动缸驱动方式,Siemens S120伺服驱动器通过驱动电动缸来控制塞棒位置从而控制中包流入结晶器的钢水流量,结晶器自动开浇控制系统具有多种控制模式及塞棒抖动和调整渣线控制等功能,自动开浇分为铸机启动前的液位控制和启动后的拉速自动上升两个过程,铸机启动前的液位根据进入结晶器的钢液流量与塞棒开口度的关系模型来控制,当启动前的液位到达设定启动液位后,自动进入升速阶段,拉速根据预设的拉速上升曲线进行控制。生产实践证明,该系统实现了连铸机结晶器开浇全自动化、减少了漏钢事故的发生,对连铸机生产高品质、无缺陷铸坯起到关键作用。
Mold automatic casting control system is the first high precision mold level control technology independently developed by China National Heavy Machinery Research Institute.The mold level detection system uses an embedded electromagnetic eddy current liquid level sensor.One probe on each side is set up at 200 mm from both sides of the sensor centerline along the width direction of the mold.The average value measured by the two probes is used as the input parameter of the liquid level control system.The sensor with double probe structure can measure the height of liquid steel without the influence of slag and steel grade.Mold level control is driven by electric cylinder.Siemens S120 servo driver controls the position of stopper to control the steel flowinto the mold.The mold automatic start casting control system has many kinds of control mode and the stopper dithering and slag line adjusting control,it includes twoprocesses,one is level control before caster starting,the other is speed upafter caster starting,the liquid level control based on the model of relational between the mold liquid steel flow and the stopper position.When the actual level get to the set level,automatically enter into the speed rise stage,the speed up according to the preset speed rise curve.The production practice proves that the system realizes the full automation of mold start casting and reduces the occurrence of steel leakage accident,at the same time,play a key role in the production of high-quality and defection-free casting slab.
作者
米进周
王旭英
史伟
高琦
钟立雯
MI Jin-zhou;WANG Xu-ying;SHI Wei;GAO Qi;ZHONG Li-wen(China National Heavy Machinery Research Institute Co.,Ltd.,Xi’an 710018,China)
出处
《重型机械》
2021年第5期24-28,共5页
Heavy Machinery
关键词
板坯连铸
结晶器液面控制
结晶器自动开浇
slab continuous casting
mold level control
mold automatic start casting
