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高炉焦炭回旋区的空间分布对回旋区燃烧段的数值模拟结果影响非常大，但由于在测定物理特性方面还存在着技术难点，所以，对此还不能进行定量描述。在本研究中，利用三维冷模并借助于激光传感器实现了焦炭回旋区空间分布的直接测定。测定的空间分布阐明了焦炭回旋区的典型分布状况，并示出入口处从风口端部到焦炭回旋区中间部位呈现较高且恒定的空间（气体中心部位），朝焦炭回旋区边缘呈现直线下降趋势。气体中心部位的尺度已用来建立轴向空间分布的无量纲表达式。通过新建立的气体中心长度（ＤＭ）、风口直径ＤＴ）及焦炭回旋区指数（Ｒｆ）之间的相关式便可对此进行评价。其相关式为：ＤＭ／ＤＴ＝０．０９６３Ｒ０．５４６ｆ。
The spatial distribution of the blast furnace coke swirl zone has a great influence on the numerical simulation results of the combustion zone in the raceway. However, there are still some technical difficulties in determining the physical characteristics of the blast furnace coke, so it can not be quantitatively described. In this study, the direct determination of the spatial distribution of coke swirl zone was achieved by means of three-dimensional cold mode and by means of a laser sensor. The measured spatial distribution illustrates the typical distribution of the coke swirl zone and shows a high and constant space (gas center) at the entrance from the tuyere end to the middle of the coke swirl zone and a straight downward trend towards the edge of the coke swirl zone . The scale of the gas center has been used to establish a dimensionless expression of axial spatial distribution. This can be evaluated by the correlation between newly established gas center length (DM), tuyere diameter DT) and coke convolution zone index (Rf). The correlation is: DM / DT = 0.0963R0.546f.