摘要：为探究CXM型超细分级磨风口环处结构参数与操作参数对粉碎区粉碎效果的影响,采用标准k-ε两方程湍流模型及多重参考系MRF模型对粉碎室内气相流场进行数值模拟。结果表明:在相同空气进风量及同一转速下,减小径向间隙有利于破坏物料环流层,当间隙为5～10 mm时,所形成的上升气流有助于物料的粉碎与分级。转盘转速的大小,一方面考虑转盘材质对转速的限制,另一方面应根据物料的物化特性结合生产经验确定转盘转速,以达到能量利用率最高。

关键词： 超细分级磨；风口环；气相流场；环流层；数值模拟

Abstract： To explore the influence of tuyére loop structure parameters and operation parameters on the grinding efficiency of crushing zone in CXM type ultrafine classifier mill， the standard k -ε turbulence model and the multiple reference frame model MRF were adopted to simulate the gas-phase flow field of grinding chamber. The simulated results showed that reducing the radial clearance helped destroy the material circulation layer in the same air amount and rotational speed. In this case， the updraft firmed as the clearance was about 5~10 mm helped grind and classify the materials. The rotary speed of the rotor should be determined by not only the limits of its material quality， but also the combination of the physicochemical characteristics of materials and production experience to achieve maximum energy utilization. 

Keywords：ultrafine classifier mill； tuyére loop； gas-phase flow field； circulation layer； numerical simulation