单颗粒岩石在反击式破碎机内的破碎机理研究
|
摘要
为研究物料在反击式破碎机内的破碎过程,运用EDEM离散元软件,对单颗粒岩石在破碎腔内的破碎机理进行了仿真研究。结果表明:单颗粒岩石在破碎过程中存在板锤铣削破碎、板锤冲击破碎、反击板反击破碎、板锤和反击板共同作用的剪切破碎;当物料尺寸远大于板锤悬臂高度时,铣削和剪切破碎为物料的主要破碎方式;当物料尺寸接近或小于板锤悬臂高度的两倍时,物料以冲击、反击和剪切破碎为主;另外转子转速存在合理工作范围,使得破碎效率最高。
In order to study the crushing process of materials in the impact crusher, the EDEM discrete element software is used to simulate the crushing mechanism of single-grain rock in the crushing cavity. The results show that in the process of crushing single-grain rock, there are shear crushing of plate hammer milling, impact crushing of plate hammer,counterattack crushing of counterattack plate, shear crushing of plate hammer and counterattack plate. When the material size is much larger than the cantilever height of the hammer, milling and shear crushing are the main methods of material crushing. When the material size is close to or less than twice the height of the cantilever of the hammer, the main crushing methods are impact, counterattack and shear crushing; in addition, the rotor speed has a reasonable working range, which makes the crushing efficiency the highest.
In order to study the crushing process of materials in the impact crusher, the EDEM discrete element software is used to simulate the crushing mechanism of single-grain rock in the crushing cavity. The results show that in the process of crushing single-grain rock, there are shear crushing of plate hammer milling, impact crushing of plate hammer,counterattack crushing of counterattack plate, shear crushing of plate hammer and counterattack plate. When the material size is much larger than the cantilever height of the hammer, milling and shear crushing are the main methods of material crushing. When the material size is close to or less than twice the height of the cantilever of the hammer, the main crushing methods are impact, counterattack and shear crushing; in addition, the rotor speed has a reasonable working range, which makes the crushing efficiency the highest.
引文
[1]郎宝贤,郎世平.破碎机[M].武汉:冶金工业出版社,2008:214-215.
[2]叶涛,刘付志标.基于EDEM的反击式破碎机仿真研究[J].矿业研究与开发,2017(2):69-72.
[3]胡明亮.基于EDEM的反击式破碎机参数分析与结构优化[D].赣州:江西理工大学,2016:1-6.
[4]张海,李森.反击式破碎机冲击破碎力有限元仿真分析[J].机械设计与制造,2012,258(8):21-23.
[5]DJORDJEVIC N,SHI F N,D.MORRISON R.Applying discrete element modelling to vertical and horizontal shaft impact crushers[J].Minerals Engineering,2003,16(10):983-991.
[6]SINNOTT M D,CLEARY P W.Simulation of particle flows and breakage in crushers using DEM:Part 2-Impact crushers[J].Minerals Engineering,2015,74:163-177.
[7]ARDI E G,DONGK J,YU A B.A combined experimental and DEM approach to determine the breakage of particles in an impact mill[J].Powder Technology,2017,318:543-548.
[8]KAFUI K D,THORNTON C.Numerical simulations of impact breakage of a spherical crystalline agglomerate[J].Powder Technology,2000,109:113-132.
[9]梁耀彪.反击式破碎机的研究设计[D].南昌:江西农业大学,2014:1-10.
[10]赵丽娟,樊志海,周文潮.煤岩破落过程中螺旋滚筒的可靠性研究[J].中国安全生产科学技术,2017,13(7):100-105.
[11]张海,张以都.冲击破碎机冲击时间的因次分析及数值仿真研究[J].中国机械工程,2006,17(6):563-566.
[12]张海.基于瞬态动力学仿真的冲击破碎机破碎力研究[D].北京:北京航空航天大学,2005:1-8.
[13]王顺凯,李叶林,马威,等.基于动力学的反击式破碎机反击板强度分析[J].有色金属(选矿部分),2015(2):79-82.
[14]徐峰.反击式破碎机破碎腔关键部件结构计算及优化分析[D].南京:南京理工大学,2007:1-12.
[15]赵丽梅,陈伦军,苏明,等.反击式破碎机破碎过程建模与仿真分析[J].煤炭学报,2013,38(8):1496-1502.
[2]叶涛,刘付志标.基于EDEM的反击式破碎机仿真研究[J].矿业研究与开发,2017(2):69-72.
[3]胡明亮.基于EDEM的反击式破碎机参数分析与结构优化[D].赣州:江西理工大学,2016:1-6.
[4]张海,李森.反击式破碎机冲击破碎力有限元仿真分析[J].机械设计与制造,2012,258(8):21-23.
[5]DJORDJEVIC N,SHI F N,D.MORRISON R.Applying discrete element modelling to vertical and horizontal shaft impact crushers[J].Minerals Engineering,2003,16(10):983-991.
[6]SINNOTT M D,CLEARY P W.Simulation of particle flows and breakage in crushers using DEM:Part 2-Impact crushers[J].Minerals Engineering,2015,74:163-177.
[7]ARDI E G,DONGK J,YU A B.A combined experimental and DEM approach to determine the breakage of particles in an impact mill[J].Powder Technology,2017,318:543-548.
[8]KAFUI K D,THORNTON C.Numerical simulations of impact breakage of a spherical crystalline agglomerate[J].Powder Technology,2000,109:113-132.
[9]梁耀彪.反击式破碎机的研究设计[D].南昌:江西农业大学,2014:1-10.
[10]赵丽娟,樊志海,周文潮.煤岩破落过程中螺旋滚筒的可靠性研究[J].中国安全生产科学技术,2017,13(7):100-105.
[11]张海,张以都.冲击破碎机冲击时间的因次分析及数值仿真研究[J].中国机械工程,2006,17(6):563-566.
[12]张海.基于瞬态动力学仿真的冲击破碎机破碎力研究[D].北京:北京航空航天大学,2005:1-8.
[13]王顺凯,李叶林,马威,等.基于动力学的反击式破碎机反击板强度分析[J].有色金属(选矿部分),2015(2):79-82.
[14]徐峰.反击式破碎机破碎腔关键部件结构计算及优化分析[D].南京:南京理工大学,2007:1-12.
[15]赵丽梅,陈伦军,苏明,等.反击式破碎机破碎过程建模与仿真分析[J].煤炭学报,2013,38(8):1496-1502.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |