基于离散元仿真的椭圆柱状筒体长宽比变化对球磨机研磨效率的影响研究
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中图分类号：TD453 文献标志码：A文章编号：1006-0316（2025）06-0015-08
doi： 10.3969/j.issn.1006-0316.2025.06.003
Investigation on Effects of Length-Width Ratio of Elliptic Cylindrical Shell on Grinding Efficiency of Ball Mill Using DEM Simulation
FANG Ziqiang1，2， LILe1 ，JIN Zhouli1， ZHANG Liang1，HE Siyu1，PENG Songlin1 （1.School of Intelligent Manufacturing， Jianghan University， Wuhan 43oo56， China;
2. School of Power and Mechanical Engineering， Wuhan University， Wuhan 430072， China ）
Abstract ∵ Targeting on AG mill with diameter of ϕ1000mm ，avalidated DEM model is employed for simulating charge motion of particles inside a ballmill with a cylindrical shellinoval cross section with respect tofive diferent length-width ratios and eight different rotating speeds of mill.The DEM results show that movement pattern of particles during charge motion is repeated twice in every revolution of elliptically shaped mill.In each period of movement pattern，most particles falldown inhigh velocityand strike withthe particles at toe Zone， when the long axis of mill rotates from the position of 0∘ to 90∘ .As the long axis of mill rotates from the position of 135∘ to 180∘ ，a majority of particles climb from toe zone，and some others at shoulder zone roll down in low velocity.Number ofcollisions at high energy among particles inside elliptically shaped mill with length-width ratioof1.5：1islarger than thosewiththe other fourlength-width ratios，so themill with length-width ratio of1.5：1has themost effctive grinding efficiency.Fortheeliptically shaped mill with length-width ratio of 1.5：1，peaks of spectrum images ofnumber ofcolisions at high energyamong particles are at 70%80% of critical speed of revolution of mill.Therefore，the optimum speed of mill with length-width ratio of1.5：1is between 70% and 80% of its critical speed of revolution.
Key words ：ballmill;grinding efficiency ieliptic cylindrical shellidiscrete element method ilength-widthratio
球磨机是开展颗粒状物料研磨细化工艺的重要生产工具[1]，广泛应用于火力发电、化工、矿业加工、水泥生产、食品加工等工业领域。（剩余7762字）