立式攪拌球磨機(jī)研磨筒結(jié)構(gòu)與破碎行為研究
[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.
【學(xué)位授予單位】:昆明理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TD453
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