关于210t RH混匀时间影响因素的水模型研究

A Study on Water Model of Influence Factors on Mixing Time of Liquid in a 210 t RH Unit

采用1:4的比例建立水力学模型模拟210 t RH内钢液流动,考察吹氩量(1 000～1 400 L/min),浸渍管插入深度(125～175 mm),吹氩孔个数(4～6)对混匀时间的影响。结果表明,对吹氩量大小的确定,需综合考虑各因素的影响;浸渍管插入过深不利于钢液混匀;较少的上层吹氩孔个数和增加下层吹氩孔个数可获得较短的混匀时间;最佳参数为吹氩量3.87 m^3/h,浸入深度120 mm,上吹氩孔4个,下吹氩孔6个。借助matlab工具求解有约束非线性最优化问题,计算得出回归方程的混匀时间极小值为27.02 s。

A water model of 1：4 scale has been established to simulate the liquid flowing in the 210 t RH unit,and to study the effect of argon blowing rate（1 000～1 400 L/min）,snorkel insertion depth（125～175 mm） and blowing argon hole number（4～6） on mixing time of liquid.Results show that to define the argon blowing rate needs to comprehensively consider the effect of each factor;it is not available to mix liquid as the snorkel inserts too depth;it is available to get an ideal mixing time with lesser number of upper argon blowing hole and increasing the number of lower argon blowing hole; and the optimum process parameters are argon blowing rate 3.87 m^3/h,snorkel insertion depth 120 mm,upper argon blowing hole number 4 and lower argon blowing hole number 6.The constrained nonlinear optimization question is solved by matlab tool to calculate and get regression equation minimum value of mixing time-27.02s.