基于离散元理论的筒辊磨粉磨特性仿真分析

Simulation Analysis of Grinding Characteristics of Horomill Based on Discrete Element Theory

摘要: 随着粉磨设备呈现大型化、高效化、节能化的新趋势，利用数值模拟软件对磨机工况进行仿真分析，成为提高设计效率、降低设计成本和设计周期的常用方法。本文基于离散元软件EDEM采用控制变量法对φ2600筒辊磨的筒体转速、最小料层厚度、喂料量设置试验组进行仿真，从破碎率和能耗的角度分析磨机的粉磨特性，为磨机设计和运行参数选择提供参考。结果表明：转速越高，破碎率越高，转速高于42 rpm时粉磨单位能耗快速增加；最小料层厚度与破碎率呈负相关关系，单位能耗随之先降后升，合理取值范围为18~24 mm；喂料量在22~37 tph范围内，破碎率存在峰值，单位能耗存在谷值，能达到较为理想的粉磨效果。

Abstract: With the new trend of large-scale, high-efficiency, and energy-saving grinding equipment, using numerical simulation software to simulate and analyze the working conditions of the mill has be-come a commonly used method to improve design efficiency, reduce design costs, and design cycles. This article is based on the discrete element software EDEM and uses the control variable method to simulate the experimental group for setting the cylinder speed, minimum material layer thickness, and feeding rate of the φ2600 Horomill. The grinding characteristics of the mill were analyzed from the perspectives of crushing rate and energy consumption, providing reference for the design and operation parameter selection of the mill. The results show that the higher the rotational speed, the higher the crushing rate. When the rotational speed is higher than 42 rpm, the unit energy con-sumption of grinding increases rapidly; The minimum material layer thickness is negatively corre-lated with the crushing rate, and the unit energy consumption decreases first and then increases, with a reasonable range of 18~24 mm; The feeding rate ranges from 22 tph to 37 tph, and there is a peak in crushing rate and a valley in unit energy consumption, which can achieve an ideal grinding effect.