塔磨机运行参数优化匹配的仿真分析与试验研究

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

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%。

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 appli- cations of tower mills. A DEM was used to simulate the main operating parameters of tower mill. Col- lision 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 210 r/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 de- cline. Comprehensive consideration of the grinding strength and energy utilization rate, the optimal fillin~ rate of the tower is as 60