摘要
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 delivery process inside the middle-speed ball mill, the discrete phase model （DPM） and the turbulence model Realizable κ - ε were applied to conduct numerical simulation and analysis on the distribution characteristics of gas-solid two-phase flow field inside the mill chamber, and the coupling effects of gas- solid two-phase flow in the chamber were analyzed from speed, pressure, temperature and streamline. The study showed： there was a complex 3D turbulent flow field inside the mill chamber, and there was severe turbulent eddy in interaction area of grinding disc and grinding ball, huge vortex formed between the grinding disc and the hopper because of air flow. After the analysis on the turbulent eddy inside the chamber, the air chamber and the air ring were determined as the key parts of the pressure loss, and then improvement suggestions were offered.
出处
《矿山机械》
2016年第11期34-37,共4页
Mining & Processing Equipment
关键词
中速球磨机
两相流
气固耦合
涡流
数值模拟
middle-speed ball mill
two-phase flow
gas-solid coupling
vortex
numerical simulation
