100 kg中频感应炉底吹氧搅拌的水模拟研究

采用几何相似比1:1的水模型对100 kg中频感应炉底吹氧的工艺参数(底吹流量0.2~0.56 m³/h,熔池高度120~330 mm)和流场进行模拟试验。结果表明,底吹熔池内形成的气相流速度在竖直方向上变化不明显,而在水平方向上存在较大梯度;随熔池高度和底吹流量的增加,气相流速度梯度变大,竖直气-液两相流变为倾斜向上运动;在熔池高度H小于240 mm、气体流量Q小于0.56 m³/h时,混匀时间分别随熔池高度和底吹流量的增加而减小,超过这一范围后混匀时间变化不明显。

A Study on Water Modelling for Bottom Blowing Oxygen Stirringof a 100 kg Medium Frequency Induction Furnace

The simulation test on bottom blowing oxygen parameters (bottom blowing rate 0. 2 ~ 0. 56 m³/h, bath height 120 ~ 330 mm) and flow field of liquid in a 100 kg medium frequency induction furnace is carried out by a geometric similarity ratio 1: 1 water model. The results show that the change of velocity of gas phase flow formed in bottom blowing bath in vertical direction is not obvious, but there is large velocity gradient in horizontal direction ； with increasing bath height and bottom blowing rate the gas phase velocity gradient increases and the vertical gas-liquid two phase flow upward movement is modified to out of the perpendicular； as bath height H less than 240 mm and gas flow rate Q less than 0. 56 m³/h, with increasing bath height and bottom flow rate the mixing time decreases, and beyond these scope the variation of mixing time is not obvious.