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为了研究中速球磨机内部粉体输运过程,采用离散相模型(DPM)和湍流模型Realizableκ-ε对磨腔气固两相流场分布特性进行数值模拟分析,分别从速度、压强、温度以及流线等角度,分析磨腔内气固两相流的耦合作用。研究表明:磨腔流场是复杂的三维旋转湍流流场,在磨盘和磨球交互区域有剧烈的湍涡现象,气流在磨盘与灰斗间形成巨大的涡流。通过对磨腔湍涡现象分析,明确了风室和风环是压损的关键部位,并提出了改进意见。
In order to study the powder transport process in the medium-speed ball mill, the discrete phase model (DPM) and the turbulent model Realizable κ-ε were used to simulate the distribution characteristics of the gas-solid two-phase flow in the cavity. The velocity, pressure, temperature, Line angle, analysis of the coupling effect of gas-solid two-phase flow in the grinding chamber. The results show that the flow field in the mill cavity is a complex three-dimensional rotating turbulent flow field with violent turbulence in the interaction area between the grinding disc and the grinding ball, and the airflow forms a huge vortex between the grinding disc and the ash bucket. By analyzing the phenomenon of turbulence in the grinding chamber, it is clear that the wind chamber and the wind ring are the key parts of the pressure loss, and some suggestions for improvement are put forward.