Two-dimensional study of gas–fine flow in a packed bed is done using both the experimental and theoretical techniques. Two types of injection systems (lateral for rectangular system and bottom for cylindrical system) are used to cover the wide range of flow behaviour. Pressure drop study is done in the presence of raceway and tuyere protrusion under decreasing gas velocity condition in order to simulate the ironmaking blast furnace (BF) conditions. Experimentally, it is observed that after fine injection, pressure loss increases slightly inside the packed bed. Developed model is able to predict the pressure loss reasonably well against experimental and published data for both clean gas and gas–fine flow in a packed bed with various types of injection systems. Tuyere protrusion and without raceway simulation results show a wide variation in pressure loss.

使用实验和理论方法对填充床中的气体细流进行了二维研究。两种类型的注射系统（矩形系统的侧向注射和圆柱形系统的底部）用于覆盖各种流动特性。为了模拟炼铁高炉（BF）条件，在有滚道和风口突起的情况下，在降低的气体速度条件下进行了压降研究。实验观察到，在精细注入后，填充床内部的压力损失会略有增加。开发的模型能够针对各种类型的注入系统的填充床中的清洁气体和气体细流，根据实验数据和公开数据合理地预测压力损失。