基于离散单元法的半自磨机工作性能研究

发布时间：2018-04-18 08:59

本文选题：离散单元法 + 半自磨机　；参考：《江西理工大学》2015年硕士论文

【摘要】：矿业领域物料的磨碎是一个重要的环节,半自磨机是在物料破磨阶段的关键设备,由于其独有的优势深得各类大型矿山的亲睐,正逐渐被广泛的应用到国内外各大矿山的选矿行业。选矿行业磨矿的效率直接的影响到后续的选矿指标,因此对半自磨机工作过程中载荷运动规律以及有用功率进行深入分析,对整个选矿行业具有重要的意义。本文以?500mm?260mm的半自磨机实验机为研究对象,采用理论分析、计算机仿真和实验分析相结合的方法完成了以下的工作:在分析半自磨机内部载荷的运动理论以及功率消耗的理论研究基础上,建立了半自磨机的的有用功率模型;引用离散单元法软件EDEM建立半自磨仿真模型,对不同工作参数下的磨矿过程进行模拟分析;根据论文的理论分析开展了半自磨机磨矿过程的计算机模拟和相关的实验研究。论文的主要研究成果如下:(1)在分析半自磨机原理及其载荷运动理论的基础上,探讨了半自磨机磨矿作用的本质;并引入了衬板结构参数对有用功率的影响,从理论方面推导了半自磨机内部载荷颗粒在泻落和抛落两种状态下的有用功率模型。(2)利用离散单元法软件建立半自磨机仿真模型,从转速率、衬板台阶数、衬板高度这些影响因素出发设计实验方案,对半自磨机磨矿过程进行了模拟,并根据模拟结果分析了各种影响因素对半自磨机有用功率之间的影响规律;同时还总结出最佳参数组合,使半自磨机的磨矿效率最佳。(3)通过了实验研究,从有用功率和比能耗两方面出发,对实验数据进行分析,得到了运行参数和衬板几何结构参数S/H分别对半自磨机磨矿性能的影响规律;探讨了不同衬板结构参数和运行参数的组合对磨矿性能的影响,并提出了最佳参数组合。通过以上表明,本论文的研究将对半自磨机磨矿理论与应用研究提供有效的途径,具有较好的理论研究意义和实际应用价值。
[Abstract]:The grinding of materials in the mining field is an important link. The semi-self-grinding machine is the key equipment in the stage of material breaking and grinding. Because of its unique advantages, it has been favored by all kinds of large-scale mines.Is gradually widely used in the domestic and foreign major mines of mineral processing industry.The grinding efficiency of the dressing industry has a direct impact on the subsequent mineral dressing index, so it is of great significance to analyze the law of load movement and useful power in the working process of the semi-self-grinding machine, which is of great significance to the whole dressing industry.In this paper, the semi-self-grinding machine with 500mm or 260mm is taken as the research object, and the theoretical analysis is used.The methods of computer simulation and experimental analysis are combined to accomplish the following work: on the basis of analyzing the motion theory of internal load and the theory of power consumption, the useful power model of semi-self-mill is established.The simulation model of semi-self-grinding is established by using discrete element method software EDEM to simulate and analyze the grinding process under different working parameters, and the computer simulation and related experimental research on the grinding process of semi-self-grinding machine are carried out according to the theoretical analysis of the paper.The main research results of this paper are as follows: (1) on the basis of analyzing the principle of semi-self-grinding machine and the theory of load movement, the essence of grinding action of semi-self-mill is discussed, and the influence of structural parameters of lining plate on useful power is introduced.In theory, the useful power model of the internal load particles in the semi-self-mill under the condition of falling and dropping is deduced. The simulation model of the semi-self-mill is established by using the discrete element method software. The speed of rotation and the number of steps of the lining plate are analyzed in terms of the speed of rotation and the number of steps of the lining plate.The influence factors of liner height are designed and the grinding process of semi-self-grinding machine is simulated. According to the simulation results, the influence of various factors on the useful power of semi-self-mill is analyzed.At the same time, the optimum parameter combination is summarized, which makes the grinding efficiency of the semi-self-grinding machine the best. The experimental data are analyzed from the aspects of useful power and specific energy consumption.The influence of operation parameters and liner geometric structure parameters S / H on the grinding performance of semi-self-grinding machine is obtained, and the effects of different lining structure parameters and operation parameters on the grinding properties are discussed, and the optimum parameters combination is proposed.The above results show that the research in this paper will provide an effective way for the study of the theory and application of semi-self-grinding mill, and it has good theoretical research significance and practical application value.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD453

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