Ore particles, especially fine interlayers, commonly segregate in heap stacking, leading to undesirable flow paths and changeable flow velocity fields of packed beds. Computed tomography (CT), COMSOL Multiphysics, and MATLAB were utilized to quantify pore structures and visualize flow behavior inside packed beds with segregated fine interlayers. The formation of fine interlayers was accompanied with the segregation of particles in packed beds. Fine particles reached the upper position of the packed beds during stacking. CT revealed that the average porosity of fine interlayers (24.21%) was significantly lower than that of the heap packed by coarse ores (37.42%), which directly affected the formation of flow paths. Specifically, the potential flow paths in the internal regions of fine interlayers were undeveloped. Fluid flowed and bypassed the fine interlayers and along the sides of the packed beds. Flow velocity also indicated that the flow paths easily gathered in the pore throat where flow velocity (1.8 × 10⁻⁵ m/s) suddenly increased. Fluid stagnant regions with a flow velocity lower than 0.2 × 10⁻⁵ m/s appeared in flow paths with a large diameter.

矿石颗粒，特别是细小的中间层，通常在堆垛中分离，导致不希望的流路和填充床的流速场变化。利用计算机断层扫描（CT），COMSOL Multiphysics和MATLAB来定量孔隙结构并可视化具有分离的细中间层的填充床内部的流动行为。细中间层的形成伴随着填充床中颗粒的分离。在堆积过程中，细颗粒到达填充床的上方位置。CT显示，细中间层的平均孔隙度（24.21％）明显低于粗矿石堆的平均孔隙度（37.42％），这直接影响了流路的形成。具体而言，精细中间层内部区域中的潜在流动路径尚未开发。流体沿着填充床的侧面流动并绕过细小的夹层。流速还表明流动路径容易聚集在孔喉处，流速为（1.8×10^-5 m / s）突然增加。流速低于0.2×10 ^-5 m / s的流体停滞区域出现在大直径的流路中。