复吹转炉水模分散相粒度分布的研究

通过二维水模型模拟复吹转炉吹炼过程。利用数码相机进行摄影，通过对得到图像中分散相的提取与粒度的计算，研究了复吹过程中炉渣与钢液分散相粒度分布的变化。结果表明：复吹转炉存在于连续相中的一定大小分散相出现的频率与其尺寸成一定的比例关系；钢滴分散相的粒度分布随顶吹和底吹强度的增加出现极值；在软吹条件下，渣滴分散相的粒度分布主要受到底吹强度QB的影响，顶吹流量QT几乎对其无影响，在硬吹条件下则受到顶、底吹共同作用的影响。并给出复吹边界条件对分散相的出现频率与其尺寸比例关系影响的经验公式。

Study on dispersed phase size distribution in combined-blown converter with water modeling

The combined blowing process of a converter is simulated with a two dimensional water model.Photographs are taken with a digital camera and changes in the dispersed phase grain size distribution of the furnace slag and liquid metal in the process of combined blowing have been studied by processing the extracted digital image and calculating grain sizes.Results show that frequency of occurrence of different grain size dispersed phase within the converter is in proportion to its size.The extremum of the dispersed phase grain size distribution of the liquid steel drop occurs with increase of intensity of the combined blowing.Under the soft combined blowing condition the dispersed phase distribution of the slag drop is primarily governed by the bottom blowing intensity Q_B and the influence of top blow rate Q_T is almost of insignificance whereas under the hard blowing condition it's governed by the combined effects of top and bottom blowing.An empirical formulae for depicting the effects of the boundary conditions on the change of the relationship between the frequency of occurrence of the dispersed phase and its size is derived.