基于前馈补偿方式的板坯结晶器液面周期性波动研究

炼钢 ›› 2019, Vol. 35 ›› Issue (4): 38-42.

基于前馈补偿方式的板坯结晶器液面周期性波动研究

田立，田运辉，谢卫东，李英姿，肖小文

(衡阳镭目科技有限责任公司，湖南衡阳421001)

接受日期:1900-01-01 出版日期:2019-08-05

Research on periodic fluctuation of liquid steel level in the slab mold based on feedforward compensation method

Accepted:1900-01-01 Online:2019-08-05

摘要/Abstract

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。

关键词: 板坯, 结晶器, 液面波动, 鼓肚现象, 前馈补偿

Abstract: 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 is used to finely adjust the stopper to reduce the periodic fluctuations of liquid level. The effectiveness of this technology has been verified in the production process of a steel plant, which has improved its production efficiency.

Key words: slab, mold, liquid steel level fluctuation, bulging phenomenon, feedforward compensation

田立，田运辉，谢卫东，李英姿，肖小文. 基于前馈补偿方式的板坯结晶器液面周期性波动研究[J]. 炼钢, 2019, 35(4): 38-42.

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