基础颗粒数量组合对颗粒黏结模型精度的影响  

Influence of Combination of Basic Particle Numbers on Accuracy of Bonded-Particle Model

作　　者：王晓 薛玉君[1,2] 程波 刘俊 官志强 李济顺 WANG Xiao;XUE Yujun;CHENG Bo;LIU Jun;Guan Zhiqiang;LI Jishun(Mechatronics Engineering School,Henan University of Science&Technology,Luoyang 471003,China;Henan Key Laboratory for Machinery Design&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,河南洛阳471003 [2]河南科技大学河南省机械设计及传动系统重点实验室,河南洛阳471003 [3]洛阳矿山机械工程设计研究院有限责任公司,河南洛阳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),河南洛阳471003 [5]School of Mechanical and Mining Engineering,University of Queensland,Queensland Brisbane 4702

出　　处：《河南科技大学学报（自然科学版）》2022年第4期27-33,M0004,共8页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家重点基础研究发展规划(973计划)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：针对矿石破碎模型与实际矿石性质差异造成的破碎仿真不准确及磨矿工艺参数难以确定的问题,采用离散元法建立矿石颗粒黏结模型,重点研究基础颗粒的数量组合对颗粒黏结模型精度的影响。依据落重试验破碎的63~53 mm粒级矿石,构建了5组不同粒径颗粒的数量组合及对应的颗粒黏结模型。通过对颗粒黏结模型的破碎仿真及实际矿石的破碎试验,得到破碎后粒度分布结果,对比分析了仿真与试验的破碎后粒度分布差异。研究结果表明:当大颗粒体积不超过总体积的50%,且中间颗粒与大颗粒体积比为0.21~0.22时,破碎仿真粒度的分布与实际矿石破碎试验结果较为一致。在模型体积填充率不变的情况下,不同基础颗粒的数量组合对破碎后颗粒团簇粒度有较大影响,选择合适的基础颗粒数量组合能够提高颗粒黏结模型的精度。In order to solve the problems of inaccurate simulation and difficult determination of grinding process parameters caused by the difference between ore crushing model and actual ore properties,the ore particle bonding model was established by the discrete element method,and the focus was on the influence of the number and combination of basic particles on the accuracy of the bonded particle model.Based on the broken ores of 63~53 mm size in the drop weight test,the quantitative combinations of five groups of particles with different particle sizes and the corresponding models were constructed.Through the crushing simulation of the bonded particle model and the crushing test of the actual ore,the results of particle size distribution after crushing were obtained,and the differences of particle size distribution between simulation and test were compared and analyzed.The results show that when the volume of large particles is less than 50% of the total volume and the volume ratio of medium particles to large particles is 0.21~0.22,the particle size distribution of crushing simulation is consistent with the actual ore crushing test results.When the volume filling rate is fixed,the combination of basic particle numbers has a greater impact on the size of the particle clusters after crushing.Choosing a suitable combination of basic particle numbers can improve the accuracy of the model.

关 键 词：颗粒黏结模型 基础颗粒数量组合 矿石破碎 离散元 

分 类 号：D453[政治法律—政治学] TP391.9[政治法律—国际共产主义运动]