Eulerian - Eulerian Model was used to research the hydrodynamic behavior of fine natural rutile particles with a density of 4 000 kg/m3 and a diameter of 46 μm in different operating gas velocity. The simulation was carried out in a two-dimensional fluidized bed with 20 mm in width anti 80 mm in height. At the operating gas velocity of 0. 004 m/s, it presents a homogeneous fluidization. When operating gas velocity is 0. 005 m/s, bubbling phenomenon with some solid particles, and aggregative fluidization appel. While increasing the operating gas velocity to0. 02 m/s,there are some hubbles without any snlid particles. All of the phenomenons agree with the experiments and simulation results reported by tile literatures.%采用欧拉-欧拉模型,在20 mm宽和80 mm高的二维流化床中,模拟了直径为46μm和密度为4 000 kg/m<'3>的细粒级人造金红石在不同操作气流速度下的流体动力学特性.在操作气流速度u=0.004 m/s时,呈现均匀的散式膨胀;当u=O.005m/s时,出现鼓泡现象,为聚式流态化,但气泡内固体含量较高;提高气流速度至O.02 m/s,床层内出现固体含量几乎为零的气泡.
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