变振幅等厚筛分过程物料透筛行为及分布研究  

Research on Screening Behavior and Distribution of Materials during Variable Amplitude Equal Thickness Screening

作　　者：温鹏飞 乔金鹏 段晨龙[1] 江海深[1] 赵跃民[1] Wen Pengfei;Qiao Jinpeng;Duan Chenlong;Jiang Haishen;Zhao Yuemin(China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学,江苏徐州221116

出　　处：《煤矿机械》2020年第4期165-167,共3页Coal Mine Machinery

基　　金：国家自然科学基金-新疆联合基金项目培育项目(U1903132);矿物加工科学与技术国家重点实验室开放研究基金项目(BGRIMMKJSKL-2017-10);中央高校基本科研业务费专项资金资助(2018BSCXB13);江苏省研究生科研与实践创新计划项目(KYCX18_1939);国家自然科学基金-辽宁联合基金重点项目(U1508210);国家自然科学基金青年基金项目(51904301);江苏省自然科学基金资助项目(BK20180650)。

摘　　要：基于三维离散元法(DEM)对新型变振幅等厚筛6 mm筛分过程进行仿真研究。采用分段分析方法,以可能偏差Epm为主要评价指标,调节筛面结构,揭示筛分性能对筛面参数的响应规律。结果表明,在稳态等厚筛分过程中,当尺寸梯度D=1.0 mm、筛孔尺寸均值为7.5 mm、开孔率组合为35%-35%-40%时,分配粒度最接近6 mm,且其可能偏差最小(Epm=0.873 mm),筛分效果达到最佳。本研究通过探索变振幅等厚筛筛面结构,调控物料透筛行为,提升等厚筛分效果,对选煤用变振幅等厚筛设计和优化具有一定的借鉴意义。Based on the three-dimensional discrete element method(DEM),a new variable amplitude equal thickness screen 6 mm screening process was simulated.The segmented analysis method was used to adjust the screen surface structure and reveal the response rule of screening performance to the screen surface parameters,with the possible deviation Epm as the main evaluation index.The results showed that in the steady-state screening process of variable amplitude equal thickness screen,when the size gradient D=1.0 mm,the mesh size of each section was 7.5 mm,and the opening ratio combination was 35%-35%-40%,the distribution particle size was the closest to 6 mm,and its possible deviation is the smallest(Epm=0.873 mm),and the screening performance was the best.By exploring the screen surface structure of variable amplitude equal thickness screen,adjust and control the screening behavior of materials and improve the screening performance,which has certain reference significance for the design and optimization of variable amplitude equal thickness screen for coal preparation.

关 键 词：DEM 变振幅等厚筛 筛面结构 

分 类 号：TD452[矿业工程—矿山机电]