立式搅拌球磨机研磨筒结构与破碎行为研究

发布时间：2018-10-20 19:43

【摘要】：立式搅拌球磨机作为一种重要的细磨甚至超细磨设备,广泛应用于选矿、涂料加工以及药物研磨等领域。据不完全统计,各大矿业生产企业年总能耗约占全国能源消费量的3.5%以上。立式搅拌球磨机作为一种主要的磨矿设备,能量消耗量巨大。因此节能减排、提高能量的利用率成为磨矿设备发展的新方向。对立式搅拌球磨机的节能优化研究,通常从磨机的结构和工作参数两个方面进行。现阶段针对立式搅拌球磨机搅拌器结构和传动装置以及磨机工作参数的研究已经较为成熟,但针对磨机研磨筒结构的研究却相对较少。因此,本文以立式搅拌球磨机的研磨筒为研究对象,通过理论和实验验证相结合的方法,对研磨筒结构做了如下内容的研究:(1)通过对立式搅拌球磨机节能优化过程中存在的相关问题进行研究,明确了对研磨筒结构研究的意义。根据立式搅拌球磨机研磨筒结构的发展和研究现状,确立了论文的主要内容和整体的技术方案。(2)通过对研磨筒内介质球的运动机理的研究,得出位于搅拌器上以及研磨筒环形研磨区内的介质运动方程以及相关的分析结果。而对研磨筒内部结构的分析,发现研磨筒内部结构对介质球的运动轨迹具有极大影响。(3)针对立式搅拌球磨机磨矿范围和破碎行为进行研究,优化磨机的能量转化率计算方法。(4)针对研磨筒可能的结构形式进行分析,确定出截面为正多边形研磨筒、内衬螺旋条研磨筒和波形研磨筒三大类筒形。利用EDEM软件进行仿真研究,确定各大类研磨筒结构中磨矿效果较好的三种筒形结构,并分别与普通研磨筒进行磨矿实验对比,验证仿真结果的可靠性和准确性。并对三种较好研磨筒结构进行横向的磨矿实验对比,得出三大类研磨筒结构中磨矿性能最好即结构最优的筒形结构。(5)以最终选定的研磨筒为研究对象,利用EDEM软件对其研磨筒内部具体结构参数进行优化研究,得出其合理的内部结构参数。并利用响应面分析方法对其主要工作参数进行分析,对最终选定的研磨筒在磨矿时的工作参数进行优化研究,确定出该研磨筒结构对应的最佳工作参数。
[Abstract]:As an important fine grinding and even ultrafine grinding equipment, vertical mixing ball mill is widely used in mineral dressing, coating processing and pharmaceutical grinding. According to incomplete statistics, the annual total energy consumption of the major mining enterprises accounts for more than 3.5% of the national energy consumption. As a main grinding equipment, vertical mixing ball mill consumes a great deal of energy. Therefore, energy saving and emission reduction, improving the utilization of energy has become a new direction of the development of grinding equipment. The research on energy saving optimization of opposite agitating ball mill is usually carried out from two aspects of mill structure and working parameters. At present, the research on the agitator structure and transmission device of the vertical ball mill and the working parameters of the mill has been more mature, but the research on the grinding cylinder structure of the mill is relatively less. Therefore, this paper takes the grinding cylinder of the vertical agitating ball mill as the research object, and combines the theory and experiment to verify the method. The main contents of this paper are as follows: (1) the significance of the research on the structure of grinding cylinder is clarified through the research on the problems existing in the process of energy saving optimization of the opposite agitating ball mill. According to the development and research status of the grinding cylinder structure of the vertical mixing ball mill, the main contents of the paper and the overall technical scheme are established. (2) through the study of the motion mechanism of the medium ball in the grinding cylinder, The equation of motion of the medium located on the agitator and the annular grinding zone of the grinding cylinder and the related analysis results are obtained. By analyzing the internal structure of the grinding cylinder, it is found that the internal structure of the grinding tube has a great influence on the motion track of the medium ball. (3) the grinding range and crushing behavior of the vertical agitating ball mill are studied. The energy conversion rate of grinding machine is optimized. (4) based on the analysis of the possible structure of the grinding cylinder, it is determined that the cross section is a regular polygonal grinding cylinder, a spiral lapping cylinder lined with a spiral strip and a corrugated lapping cylinder. In this paper, three kinds of cylindrical structures with better grinding effect are determined by using EDEM software, and the results of grinding experiments are compared with those of common grinding cylinders to verify the reliability and accuracy of the simulation results. Three kinds of better grinding tube structures are compared by transverse grinding experiments, and the cylindrical structure with the best grinding performance is obtained. (5) taking the final grinding cylinder as the research object, the grinding cylinder structure with the best grinding performance is obtained. The specific structure parameters of grinding tube were optimized by EDEM software, and the reasonable internal structure parameters were obtained. The main working parameters are analyzed by using response surface analysis method, and the working parameters of the final selected grinding cylinder in grinding are optimized, and the optimum working parameters corresponding to the structure of the grinding cylinder are determined.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD453

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