The application of packed technology effectively reduces the height of flotation column and improves the treatment capacity. The effect of packed sieve plate on bubble size and velocity in flotation column affect the flotation recovery. Based on high-speed dynamic measurement and particle image velocimetry (PIV) measurement, the velocity and size of bubbles in open and packed flotation column were compared first and then the effect of different packing method was studied. With sieve plate packing, the peak tangential velocity of bubble decreased by 92%; the number of bubbles within the range of 1–2.5 mm increased from 62.79% to 83.34% and the mean bubble diameter decrease from 2.14 mm to 1.82 mm. Sieve plate packed weakens the influence of rotation flow, reduces the bubble size and makes the distribution is more uniform in flotation column, which is conducive to the collision and adhesion of particles and bubbles. The effect study of opening hole size, thickness and packed position of sieve plate on bubble size distribution shows that the small opening hole size of sieve plate has a strong segmentation effect on bubbles, and can reduce the bubble size; Thick sieve plate will increase bubble coalescence and increase bubble size; The bubbles have a good distribution with sieve plate packed at a height of 0.5 times the diameter of the column. This study can provide guidance for the design of packed method in flotation column.

填料技术的应用有效降低了浮选塔高度，提高了处理能力。填料筛板对浮选柱气泡大小和流速的影响影响浮选回收率。基于高速动态测量和粒子图像测速（PIV）测量，首先比较了开孔和填充浮选柱中气泡的速度和大小，然后研究了不同填充方法的效果。采用筛板填料，气泡最高切向速度降低92%；1-2.5 mm范围内的气泡数从62.79%增加到83.34%，平均气泡直径从2.14 mm减小到1.82 mm。筛板填料减弱了旋流的影响，减小了气泡尺寸，使浮选塔内分布更均匀，有利于颗粒和气泡的碰撞和粘附。筛板开孔尺寸、厚度和填充位置对气泡尺寸分布的影响研究表明，筛板开孔尺寸小，对气泡分割作用强，能减小气泡尺寸；较厚的筛板会增加气泡的聚结，增加气泡的尺寸；气泡分布良好，筛板填充高度为塔直径的0.5倍。该研究可为浮选塔填料法的设计提供指导。筛板厚度和填充位置对气泡尺寸分布的影响表明，筛板开孔尺寸小，对气泡有很强的分割作用，可以减小气泡尺寸；较厚的筛板会增加气泡的聚结，增加气泡的尺寸；气泡分布良好，筛板填充高度为塔直径的0.5倍。该研究可为浮选塔填料法的设计提供指导。筛板厚度和填充位置对气泡尺寸分布的影响表明，筛板开孔尺寸小，对气泡有很强的分割作用，可以减小气泡尺寸；过厚的筛板会增加气泡的聚结，增加气泡的尺寸；气泡分布良好，筛板填充高度为塔直径的0.5倍。该研究可为浮选塔填料法的设计提供指导。