目的 探究阀口袋充填过程中抽气压力变化对包装内粉体运动规律、飞粉浓度、颗粒捕获率及包装密实度的影响，以典型工业用粉氢氧化锂为研究对象，寻找其最佳充填工艺。方法 基于气固耦合机理，应用Ansys Fluent中的Realisable k-ε湍流模型和离散相模型对阀口袋在5种不同抽气压力下的充填抽气过程进行仿真模拟，设置抽气装置对粉体的捕获率、包装内的密实度及飞粉浓度作为评判标准。 结果 抽气压力增加将导致颗粒在充填抽气口附近聚集，提高包装内的飞粉浓度、颗粒捕获率及包装密实度；抽气压力为0.04～0.06 MPa时，阀口袋内的飞粉浓度和颗粒捕获率相对较低，且包装密实度可达90%以上。结论 通过设置合适的抽气压力范围，可保证在进行粉体充填时袋内的飞粉浓度、颗粒捕获率较低，同时保证包装内适当的密实度。

The work aims to investigate the effect of the change of the pumping pressure during the filling process of the valve bag on the powder movement in the package, the concentration of flying powder, the particle capture rate, and the compactness of the package and find out the optimum filling process with the typical industrial powder lithium hydroxide as the research object. Based on the gas-solid coupling mechanism, the Realisable k-ε turbulence model and discrete phase model in Ansys Fluent were used to simulate the filling and pumping process of the valve bag under 5 different pumping pressure. The particle capture rate, compactness in the package, and flying powder concentration were set as the evaluation criteria. Increasing the pumping pressure caused particles to be collected near the filling extraction port, and improved the concentration of flying powder in the package, the rate of particle capture, and the compactness of the package at the same time. When the pumping pressure was 0.04～0.06 MPa, the flying powder concentration and particle capture rate in the valve bag were relatively low, and the compactness of the package could reach more than 90%. By setting an appropriate range of pumping pressure, the flying powder concentration and particle capture rate in the bag can be guaranteed to be low during the powder filling process, and the appropriate compactness in the package can also be guaranteed.