塔磨机运行参数优化匹配的仿真分析与试验研究

现有对塔磨机运行参数优化匹配研究不足，影响了塔磨机磨矿效率的提高及其工程应用，为此应用离散元法对某塔磨机主要的运行参数进行了仿真，对碰撞能量、碰撞频率、功率消耗等与磨矿性能相关的物理量进行了研究，并通过试验分析了各运行参数对矿料粒度的影响，验证了模拟分析的准确性。研究结果表明，在临界转速下，转速越高，研磨效率越高，该塔磨机最优的转速为210r/min；填充率过低则磨矿强度较低，填充率过高则能量利用率下降，综合考虑磨矿强度及能量利用率，该塔磨机的最优填充率为60%。

Simulation Analyses and Experimental Investigation on Optimum Matching of Operating Parameters of Tower Mill

The existing researches on optimum matching of operating parameters of the tower mill were  insufficient, which affected  the development of the grinding efficiency and the engineering applications of tower mills.A  DEM  was used to simulate the main operating parameters of tower mill. Collision energy,collision frequency, power consumption and other physical quantities which were  related to the  grinding performance were studied.The effects of the operating parameters on  the aggregate  particle size were  obtained  through the experiments  and the accuracy of the simulation analyses was verified. The results show that, under the critical speed, the higher the speed  the better  the grinding efficiency  and the optimal speed of the tower mill is  210r/min;if  the filling rate is  so low   that the grinding strength will also  be low, if the filling rate  is  so  high  that the energy  utilization rate will decline. Comprehensive consideration of the grinding strength and energy utilization rate, the optimal filling rate of the tower is as 60%.