基础颗粒粒径对颗粒黏结模型精度的影响  

Influence of basic particle diameter on accuracy of bonded-particle model

作　　者：王晓 薛玉君[1,2] 程波 刘俊 GUAN Zhi-qiang 李济顺[1,2] WANG Xiao;XUE Yu-jun;CHENG Bo;LIU Jun;GUAN Zhi-qiang;LI Ji-shun(School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,China;Henan Key Laboratory for Machinery Design and Transmission System,Henan University of Science and Technology,Luoyang 471003,China;Luoyang Mining Machinery Engineering Design Institute Co.,Ltd.,Luoyang 471003,China;State Key Laboratory of Mining Heavy Equipment,CITIC Heavy Industries Co.,Ltd.,Luoyang 471003,China;School of Mechanical and Mining Engineering,University of Queensland,Brisbane 4702,Australia)

机构地区：[1]河南科技大学机电工程学院,洛阳471003 [2]河南省机械设计及传动系统重点实验室(河南科技大学),洛阳471003 [3]洛阳矿山机械工程设计研究院有限责任公司,洛阳471003 [4]矿山重型装备国家重点实验室,中信重工机械股份有限公司,洛阳471003 [5]School of Mechanical and Mining Engineering,University of Queensland,Brisbane 4702,Australia

出　　处：《中国有色金属学报》2022年第5期1491-1503,共13页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2012CB724306);郑洛新国家自创区创新引领型产业集群专项(201200210500)。

摘　　要：应用离散元方法(Discrete elementmethod,DEM)仿真矿石破碎时,通常采用颗粒黏结模型对矿石进行建模,颗粒黏结模型中的基础颗粒粒径对仿真结果影响显著。为了研究基础颗粒粒径变化对模型精度的影响,本文设计了9组基础颗粒粒径组合,构建了矿石的颗粒黏结模型,进行了金矿石破碎的离散元仿真,得到了不同粒径组合下的破碎粒度分布,并将仿真结果与试验得到的破碎粒度分布进行了对比分析。结果表明:基础颗粒粒径组合对模型精度存在影响,采用适当的基础颗粒粒径组合构造颗粒黏结模型能够提高模型精度。当基础颗粒粒径之间的差值相当时,模型精度较高,仿真得到的破碎粒度分布和落重试验结果的一致性良好。对相同粒度的铁矿石与铜矿石进行了仿真,验证了基础颗粒粒径选取方法的有效性。By using the discrete element method(DEM)for ore crushing simulation,the bonded-particle model is usually selected.The basic particle diameter in the bonded-particle model has a significant influence on the simulation results.In order to study the influence of the change of basic particle size on the accuracy of the model,nine groups of basic particle diameter combinations were designed to construct the bonded-particle model in this paper.Based on this model,the simulation on gold ore crushing processing was carried out using DEM,and the distribution of crushing sieving size grade under different particle diameter combinations was obtained.The simulation results were compared and analyzed with the experiment results.The results show that the combination of basic particle size has an impact on the accuracy of the model.Using a proper combination of basic particle size to construct a bonded-particle model could improve the accuracy of the model.When the difference between the basic particle diameters is uniform,the model accuracy is high,and the simulation results are in good agreement with the drop-weight test results.The simulations of iron ore and copper ore with the same particle size verify the effectiveness of the basic particle selection method.

关 键 词：颗粒黏结模型 矿石破碎 离散元方法 破碎仿真 落重试验 

分 类 号：TD453[矿业工程—矿山机电] TP391.9[自动化与计算机技术—计算机应用技术]