摘要
在生产不锈钢和包晶钢的板坯连铸过程中,经常出现结晶器液面呈周期性波动的问题。随着拉速增大,周期性波动问题越严重,结晶器钢液面波动过大会发生保护渣卷渣现象,结晶器钢液面波动过于平静时钢液中的夹杂物不能上浮。该问题不仅降低了连铸生产效率,更造成了铸坯质量的下降,因此对不锈钢和包晶钢浇铸过程中周期性液面波动的研究显得尤为重要。结合某钢厂实际生产情况,详细分析了结晶器液面波动的原因,并针对液位控制系统的周期性液位波动(鼓肚现象),采用前馈补偿方式对塞棒进行微调节从而减轻液位周期性波动,这一技术的有效性在实际生产中可将结晶器液面波动幅度由30 mm稳定在±3 mm内,并提高了其生产效益。
Slab continuous casting in the process of producing stainless steel and peritectic steel,the problem of periodic fluctuations of the liquid steel level in the mold often occurs.As the casting speed increases,the periodic fluctuation problem becomes more serious.When the liquid steel level fluctuation of the molten steel is excessive,the slag entrainment phenomenon occurs.When the liquid level fluctuation of the molten steel is too calm,the inclusions in the molten steel cannot rise.This ubiquitous problem not only reduces the efficiency of continuous casting production,but also causes the decline of the quality of the slab.Therefore,the research on the periodic liquid level fluctuation during the casting process of stainless steel and peritectic steel is particularly important.In this paper,the actual production situation of a steel plant was analyzed in detail,and the causes of the liquid level fluctuation of the mold were analyzed.For the periodic liquid level fluctuation(bulging phenomenon) of the liquid steel level control system,the feedforward compensation method was used to finely adjust the stopper to reduce the periodic fluctuations of liquid level.The technology can stabilize the fluctuation range of mold liquid level from 30 mm to ±3 mm in actual production and improve the production benefit.
作者
田立
田运辉
谢卫东
李英姿
肖小文
TIAN Li;TIAN Yunhui;XIE Weidong;LI Yingzi;XIAO Xiaowen(Ramon Science & Technology Co. ,Ltd. , Hengyang 421001,China)
出处
《炼钢》
CAS
北大核心
2019年第4期38-42,共5页
Steelmaking
关键词
板坯
结晶器
液面波动
鼓肚现象
前馈补偿
slab
mold
liquid steel level fluctuation
bulging phenomenon
feedforward compensation
作者简介
通讯作者:田运辉(1981-),男,工程师.E-mail:tianyh@ramon.com.cn.
