基于离散元的立式磨粉磨方式研究
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摘要
在离散元软件EDEM中建立磨辊碾压物料颗粒的离散元模型后进行模拟仿真,以分析柱辊、锥辊和胎辊三种粉磨方式下的粉磨效果。分析结果表明:不同粉磨方式下最大磨辊压力无显著性变化;分析物料颗粒接触数量和接触矢量得到胎辊方式下颗粒积聚程度和挤压程度优于其他两种方式,粉磨效果最佳,柱辊粉磨方式下粉磨效果较差。利用后处理输出磨辊压力与位移的数据,结合数学知识计算出柱辊、锥辊和胎辊三种粉磨方式的做功,得出胎辊粉磨方式消耗的能量最多,柱辊次之,锥辊最小,结合后处理输出不同粉磨方式下颗粒具有的总能量图验证了这一结果的正确性。整个仿真得出的结果可以为立磨粉磨方式的选择提供参考。
To analyze the grinding effects of three grinding modes with column roller,cone roller and tire roller,the discrete element models of the rollers and compacted material particles were established in the discrete element software EDEM,and simulation analysis was performed.It is concluded that there is no significant change in maximum roller pressure under different grinding methods.In perspective of the contact number and the contact vector of the material particles,the tire roller mode was the best in three methods,and the grinding effect of the column roller grinding method was poor.Through post-processing,the roll pressure and displacement data were outputted.Combined with knowledge of mathematics,the work done by the three grinding methods were calculated,and the consumption energy of three milling method were calculated.The results show the tire roller grinding method consumes the most energy,followed by the column roller and the cone roller.The result of the whole simulation can provide a theoretical support and reference for the selection of vertical mill grinding method.
To analyze the grinding effects of three grinding modes with column roller,cone roller and tire roller,the discrete element models of the rollers and compacted material particles were established in the discrete element software EDEM,and simulation analysis was performed.It is concluded that there is no significant change in maximum roller pressure under different grinding methods.In perspective of the contact number and the contact vector of the material particles,the tire roller mode was the best in three methods,and the grinding effect of the column roller grinding method was poor.Through post-processing,the roll pressure and displacement data were outputted.Combined with knowledge of mathematics,the work done by the three grinding methods were calculated,and the consumption energy of three milling method were calculated.The results show the tire roller grinding method consumes the most energy,followed by the column roller and the cone roller.The result of the whole simulation can provide a theoretical support and reference for the selection of vertical mill grinding method.
引文
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[2]宋志义,朱邦州.应用立式辊磨降低粉磨电耗[J].水泥技术,1998(6):31-33.
[3]杜秀光.立式磨粉磨水泥的技术状况和经济分析[J].新世纪水泥导报,2001(6):7-9.
[4]申占民.辊式磨在水泥工业中的发展和应用[J].水泥技术,2002(4):57-58.
[5]高雨航,李震,于灏,等.基于离散元的生物质成型机锥面研究[J].科技创新导报,2017(30):89-89.
[6]邓小林.我国立式磨技术现状及选型应注意的问题[C]//2009国内外粉磨新技术交流大会.武汉:中国硅酸盐学会科普工作委员会,2009.
[7]Loesche Gmbh.Mills for the world:Loesche’s 1906-2006centenary[J].ZKG International,2006,59(10):26-34.
[8]Cundall P A.Formulation of a three-dimensional distinct element model-partⅠ:a scheme to detect and represent contacts in system composed of many polyhedral blocks[J].International Journal of Rock Mechanics and Mining Sciences and Geo-mechanics Abstracts,1988,25(3):107-116.
[9]Ahluwalia S C,Hacklander-Woywadt C,Abraham P C.Operating experience with the first Loesche mill with the3+3system for grinding clinker and blastfurnace slag[J].Cement International,2006,4(2):90-98.
[10]李永奎,孙月铢,白雪卫.玉米秸秆粉料单模孔致密成型过程离散元模拟[J].农业工程学报,2015,31(20):212-217.
[11]张玉宝,毛海东.基于ADAMS/Vibration的立式辊磨机粉磨装置的振动分析[J].煤矿机械,2017,38(4):37-40.