学术论文

      多流中间包钢液流动特性分析方法

      A method for characterizing the flow fluid in a multi-strand tundish

      摘要:
      中间包水模型实验一般采用脉冲刺激-响应实验,分析所得平均停留时间分布(RTD)曲线特征;然而经典组合模型处理多流中间包RTD曲线时经常出现负体积死区分率或结果偏差较大的问题.本文基于组合模型,采用阶段刺激-响应实验,分析所得累计停留时间分布F曲线特征,对死区比例和活塞区比例进行计算.该模型计算方法适用于多流中间包的流场特征计算.基于累计停留时间分布曲线特征分析,对某钢厂七流中间包控流装置结构进行优化,优化后的中间包死区比例降低,各流差异减小,有利于生产顺行和铸坯质量的提高.
      Abstract:
      The residence time distribution (RTD) obtained from a pulse tracer experiment is always used for characterizing the flow fluid in tundishes.However,it is not suit to multi-strand or asymmetric tundishes because of negative volume or deviations calculated by the typical combined model using the RTD.In this paper,the accumulated residence time distribution (F curve) obtained from a step tracer experiment is applied to dead volume and plug volume calculations.This method is appropriate for single-strand tundishes and multi-strand tundishes.In this way,a 7-strand tundish in a steel plant is studied for optimizing its flow control devices.In the end,the dead volume decreases,and the distribution of molten steel among the strands tends to uniform,which benefits the slab quality and production process.
      作者: 李东侠 [1] 崔衡 [2]
      Author: LI Dong-xia [1] CUI Heng [2]
      作者单位: 北京科技大学冶金工程研究院,北京,100083 北京科技大学冶金工程研究院,北京 100083;北京科技大学钢铁共性技术协同创新中心,北京 100083
      刊 名: 工程科学学报 ISTICEIPKU
      年,卷(期): 2016, 38(1)
      分类号: TF777
      在线出版日期: 2016年6月16日