球磨机筒体仿真与磨矿参数优化

发布时间：2018-06-09 16:59

本文选题：大型球磨机 + EDEM-WORKBENCH联合仿真　；参考：《吉林大学》2017年硕士论文

【摘要】：随着经济发展,工业对矿产原料需求增加,能源价格上涨,环保要求趋严。球磨机大型化已经成为技术的倾向。本文对大型球磨机进行了建模仿真,研究了大型球磨机各磨矿参数对磨矿效果的影响。探讨了EDEM-WORKBENCH联合仿真在研究球磨机筒体应力方面的应用。利用正交试验法对球磨机的磨矿参数进行了优化。主要研究内容如下:1.介绍了球磨机的优缺点及其大型化的发展趋势,探讨了大型球磨机的研究方法。介绍了球磨机现阶段存在的问题及学者和工程师们对球磨机的研究现状。接着介绍了离散元法在球磨机上的应用。2.介绍了球磨机的结构和工作原理,推导了球磨机工作参数的计算公式。介绍了离散元的发展史,离散元的基础模型和离散元的基本计算原理。3.研究了球磨机中颗粒的运动规律和球磨机筒体的受力磨损等情况。对衬板高度和间距设计提出了建议。4.对球磨机进行了建模。研究了球磨机的转速、填充率,介质直径大小等磨矿参数变化对球磨机转矩、筒体载荷、筒体磨损、颗粒碰撞次数、颗粒接触数、颗粒动能和颗粒压力等磨矿效果评价指标的影响。定性的给出了各个磨矿参数与磨矿评价指标的正负相关性、线性关系的强弱及变化率的大小,并对其原因进行了解释。5.探讨了用EDEM-WORKBENCH联合仿真建模分析球磨机筒体应力。并利用正交分析方法,以颗粒碰撞次数、颗粒接触数、颗粒动能、衬板磨损量和筒体应力作为磨矿效果评价指标对球磨机的磨矿参数进行了优化。6.对今后球磨机的研究给出了建议。如在本文基础上再加入FLUENT模拟矿浆进行联合仿真,做能够破碎的粒子模型等。本文研究了磨矿参数改变对磨矿效果的影响,探讨了EDEM-WORKBENCH联合仿真在研究球磨机筒体应力方面的应用。用正交优化方法对磨矿参数进行了优化。为今后大型球磨机的研究和设计提供了参考依据。
[Abstract]:With the development of economy, industrial demand for mineral raw materials increases, energy prices rise, and environmental protection requirements become more stringent. The large-scale ball mill has become the trend of technology. In this paper, the modeling and simulation of large ball mill are carried out, and the influence of grinding parameters of large ball mill on grinding effect is studied. This paper discusses the application of EDEM-WORKBENCH joint simulation in studying the stress of ball mill cylinder. The grinding parameters of ball mill were optimized by orthogonal test. The main research contents are as follows: 1. The advantages and disadvantages of ball mill and the development trend of its large scale are introduced, and the research methods of large ball mill are discussed. This paper introduces the existing problems of ball mill and the research status of ball mill by scholars and engineers. Then the application of discrete element method in ball mill. This paper introduces the structure and working principle of ball mill, and deduces the formula for calculating the working parameters of ball mill. This paper introduces the history of the discrete element, the basic model of the discrete element and the basic calculation principle of the discrete element. The movement of particles in ball mill and the mechanical wear of ball mill cylinder are studied. Suggestions for the design of the height and spacing of the linings are given. The model of ball mill is established. The effects of grinding parameters such as rotational speed, filling rate and diameter of medium on ball mill torque, cylinder load, cylinder wear, particle collision times and particle contact number are studied. The influence of particle kinetic energy and particle pressure on the evaluation index of grinding effect. The positive and negative correlation between grinding parameters and grinding evaluation index, the strength of linear relation and the magnitude of change rate are given qualitatively, and the reasons are explained. In this paper, EDEM-WORKBENCH is used to simulate and analyze the stress of ball mill cylinder. Using the orthogonal analysis method, the grinding parameters of ball mill were optimized by using particle collision number, particle contact number, particle kinetic energy, liner wear and cylinder stress as the evaluation index of grinding effect. Some suggestions are given for the future research of ball mill. On the basis of this paper, fluent is added to simulate ore slurry to simulate and make particle model which can be broken and so on. In this paper, the influence of grinding parameters on grinding effect is studied, and the application of EDEM-WORKBENCH joint simulation in studying the stress of ball mill cylinder is discussed. The grinding parameters were optimized by orthogonal optimization method. It provides a reference for the research and design of large ball mill in the future.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD453

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