基于离散元法的立式双行星球磨机建模仿真研究

发布时间：2018-06-10 13:40

本文选题：立式双行星球磨机 + 离散元法　；参考：《昆明理工大学》2015年硕士论文

【摘要】：球磨机是一种在物料破碎与粉磨作业中应用最广泛的介质运动式粉碎设备,长期以来一直备受国内外研究者的重视,而且随着现代工业的发展,各种新的高能球磨设备不断涌现,但是相关方面的理论研究却相对滞后。本文以立式双行星球磨机为研究对象研究了工作参数对该球磨机粉磨效率的影响,为该类球磨机实际制备粉体时工作参数的选取以及对其介质运动规律的分析提供参考依据。本文首先对国内外球磨机的研究现状和发展趋势进行了概述,对球磨机介质运动理论研究现状进行了概括,并重点介绍了颗粒离散元法的基础理论以及在球磨机研究上的应用现状。对立式双行星球磨机的工作原理、运动状况进行了理论分析,对影响球磨介质运动规律的主要工作参数及其对磨矿效果的影响机理进行了阐述,对矿石粉碎功耗进行了论述,为后面章节的离散元数值模拟仿真和实验研究提供了理论依据,奠定了理论基础。其次,以立式双行星球磨机单位质量的冲击能量最大为目标,选取介质填充率、介质配比、球料比三个工作参数及其水平,采用试验优化的方法确定试验点。利用离散元仿真软件EDEM建立该球磨机的离散元模型,并对不同试验点进行数值模拟仿真,从而获得该球磨机粉磨矿料过程中的冲击能量。通过极差分析法和方差分析法对仿真所得的数据进行处理分析,并结合介质运动理论,综合考虑得出立式双行星球磨机粉磨矿料的最佳工作参数组合。最后,通过立式双行星球磨机粉磨铂钯矿的实验,对仿真所得到的最佳工作参数组合进行实际验证,得出实验结果与仿真结果基本一致,从而验证了颗粒离散元法在立式双行星球磨机应用的正确性。
[Abstract]:Ball mill is the most widely used medium moving grinding equipment in material crushing and grinding. It has been paid attention to by researchers at home and abroad for a long time, and with the development of modern industry, A variety of new high-energy ball milling equipment are emerging, but the related theoretical research is relatively lagging behind. In this paper, the effect of working parameters on the grinding efficiency of vertical double planet ball mill is studied, which provides a reference for the selection of working parameters and the analysis of the law of medium motion in the actual preparation of this kind of ball mill. In this paper, the research status and development trend of ball mill at home and abroad are summarized, and the research status of media motion theory of ball mill is summarized. The basic theory of particle discrete element method and its application in ball mill are introduced. The working principle and motion state of the opposite-type double planet ball mill are analyzed theoretically. The main working parameters which affect the motion law of the ball milling medium and the mechanism of its influence on the grinding effect are expounded. The power consumption of ore crushing is also discussed. It provides a theoretical basis for the numerical simulation and experimental research of discrete element in the following chapters. Secondly, taking the maximum impact energy per unit mass of vertical double planet ball mill as the target, three working parameters and their levels are selected, such as medium filling ratio, medium ratio and ball / material ratio, and the test points are determined by the method of test optimization. The discrete element model of the ball mill was established by using the discrete element simulation software EDEM, and the impact energy of the ball mill during the grinding process was obtained by numerical simulation of different test points. By means of range analysis method and variance analysis method, the data obtained from simulation are processed and analyzed. Combined with the theory of medium motion, the optimum working parameters combination of grinding ore of vertical double planet ball mill is obtained. Finally, through the experiment of grinding platinum-palladium ore with vertical double planetary ball mill, the optimum working parameter combination obtained by simulation is verified in practice, and the experimental results are basically consistent with the simulation results. The application of particle discrete element method in vertical double planet ball mill is verified.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD453

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