基于離散元仿真的橢圓柱狀筒體長寬比變化對球磨機(jī)研磨效率的影響研究

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中圖分類號：TD453 文獻(xiàn)標(biāo)志碼：A文章編號：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 ?1000mm ，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

球磨機(jī)是開展顆粒狀物料研磨細(xì)化工藝的重要生產(chǎn)工具[1]，廣泛應(yīng)用于火力發(fā)電、化工、礦業(yè)加工、水泥生產(chǎn)、食品加工等工業(yè)領(lǐng)域。（剩余7762字）