Distinct element method simulation of mechanical properties of material layer of pellet belt roasting machine
作者机构：School of Metallurgical EngineeringAnhui University of TechnologyMa’anshan243032AnhuiChina Xinyu Iron and Steel Group Co.Ltd.Xinyu338000JiangxiChina Key Laboratory of Metallurgy Engineering&Resources Recycling(Anhui University of Technology)Ministry of EducationMa’anshan243002AnhuiChina
出 版 物：《Journal of Iron and Steel Research International》 (钢铁研究学报（英文版）)
年 卷 期：2024年第31卷第11期
页 面：2633-2644页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：support from the Outstanding Youth Fund of Anhui Province(Grant No.2208085J19)
主 题：Belt roasting machine Distinct element method Green pellet Thick material layer Mechanical property
摘 要：The thick layer and graded feeding technology of a belt roasting machine is an effective method for improving the production efficiency and quality index of pellet production,and a reasonable design of the mechanical structure of the layer is the basis for optimizing the heat and mass transfer performance of the *** effect and von Mises yield criterion were used to establish a simplified mathematical model describing the elastic and plastic deformation of the green pellet under the action of an external *** mechanical characteristics of extrusion,contact,and elastic-plastic deformation between green pellet particles in the material layer of the belt roasting machine were modeled using EDEM *** a green pellet size of 12 mm,as the layer height increases from 300 to 1000 mm,the maximum vertical pressure on the pellets increases from 11.64 to 24.01 N,and the porosity decreases from 27.04%to 22.01%.As the layer height increases,the contact between the green pellets becomes more intense,and the force chain structure of the layer becomes more stable;the Janssen effect is observed when the layer reaches 700 *** compressive strength of the green pellets is linearly related to the particle size,and the compressive strength increases with an increase in particle *** a layer height of 600 mm,as the particle size of the green pellets increases from 8 to 20 mm,the maximum vertical pressure increases from 7.54 to 44.16 N,and the porosity increases from 23.20%to 31.47%,while the yield per unit of the layer decreased by 12.1%.Small particles have a more stable force chain structure,larger comparative area,and higher production efficiency;however,their compressive strength is *** particles have higher compressive strength and good permeability in the layer,but the production efficiency is relatively *** actual production,a variety of factors should be integrated to optimize the feeding,and a multi-granularity graded feeding is the most ideal
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