多流连铸中间包停留时间分布曲线总体分析方法

来源期刊：金属学报2010年第9期

论文作者：雷洪 赵岩 鲍家琳 刘承军 陈海耿 赫冀成

文章页码：1109 - 1114

关键词：连铸； 多流中间包； 总体停留时间分布(RTD)； 流动特性； RTD曲线

Key words：continuous casting； multi-strand tundish； whole residue time distribution(RTD)； flow characterization； RTD curve

摘    要：提出了一种研究多流中间包钢液流动特性的分析方法.首先,利用多流中间包各流的实验数据得到多流中间包的总体停留时间分布(RTD)曲线;其次,采用经典的分析模型研究多流中间包的总体RTD曲线;最后,以平均停留时间作为关键参数来评估多流中间包各流钢液流动特性的一致性.此方法的优点在于避免了负死区体积的出现,并且死区体积分率大小符合物理事实.

Abstract: The study of residue time distribution (RTD) curve is usually one of the effective methods to estimate the flow characteristics in the continuous casting tundish.In the past,the analysis model for RTD curve of one-strand is usually applied to estimate the individual strand data in multi-strand tundish,but the result obtained by such a model can not agree with the physical fact sometimes. In this paper,an analysis model is proposed to analyze flow characteristics in multi-strand tundish. First,the whole RTD curve of multi-strand tundish is obtained by the individual strand data.Second, classic analysis model is applied to analyze the whole RTD curve of multi-strand tundish.Third, average residence time is chosen as a key parameter to estimate the similarity of flow characteristics of each strand in the multi-strand tundish.Such an analysis approach can avoid the occurrence of the negative dead zone.And the volume ratio of dead zone satisfies the physical facts.