Performance analysis of vertical stirred mill based on multi-coupling method

IF 4.2 2区 工程技术 Q2 ENGINEERING, CHEMICAL Advanced Powder Technology Pub Date : 2024-07-30 DOI:10.1016/j.apt.2024.104603
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Abstract

To improve vertical mill performance, a vertical stirred mill is used as the research object. Firstly, an electromechanical multi-body dynamic model (EMBD) of the vertical stirred mill is established, followed by the establishment of a discrete element method (DEM) analysis model of the grinding media, and then the DEM-EMBD coupling model is formed. The feasibility of the DEM-EMBD coupling model is verified through experiments. On this basis, the stress distribution state of the helical agitator is analysed based on the coupling method of the discrete element method and finite element method (DEM-EMBD-FEM). The DEM-EMBD coupling model can better reflect the dynamic characteristics of the vertical stirred mill by comparing it with the DEM model and the coupling method of discrete element method and computational fluid dynamics (DEM-CFD) respectively. Finally, the effects of vertical stirred mill structural parameters, operating parameters and grinding media size on mill performance are investigated by the DEM-EMBD and DEM-EMBD-FEM coupling models. The approach then provides insights into the structural design of vertical stirred mills, motor selection, and the welding process between the helical blades and screw.

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基于多耦合方法的立式搅拌磨性能分析
为提高立磨性能,本文以立式搅拌磨为研究对象。首先建立立式搅拌磨的机电多体动力学模型(EMBD),然后建立研磨介质的离散元法(DEM)分析模型,最后形成 DEM-EMBD 耦合模型。通过实验验证了 DEM-EMBD 耦合模型的可行性。在此基础上,基于离散元法和有限元法的耦合方法(DEM-EMBD-FEM)分析了螺旋搅拌器的应力分布状态。通过与 DEM 模型和离散元法与计算流体力学耦合方法(DEM-CFD)的比较,DEM-EMBD 耦合模型能更好地反映立式搅拌磨的动态特性。最后,通过 DEM-EMBD 和 DEM-EMBD-FEM 耦合模型研究了立式搅拌磨的结构参数、运行参数和研磨介质粒度对磨机性能的影响。该方法为立式搅拌磨的结构设计、电机选择以及螺旋叶片和螺杆之间的焊接工艺提供了启示。
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来源期刊
Advanced Powder Technology
Advanced Powder Technology 工程技术-工程:化工
CiteScore
9.50
自引率
7.70%
发文量
424
审稿时长
55 days
期刊介绍: The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)
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