基于DEM-FEM的弹性筛面材料特性动态设计与应用  

Dynamic Design and Application of Elastic Screen Plate Material Characteristics Based on DEM-FEM

作　　者：石巍 侯旭 王维楠 段晨龙[1] SHI Wei;HOU Xu;WANG Weinan;DUAN Chenlong(School of Chemical Engineering Technology,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;Jiangsu Hewa Screening Product Co.,Ltd.,Xuzhou 221116,Jiangsu,China;State Key Laboratory of Mineral Processing,Beijing 102628,China)

机构地区：[1]中国矿业大学化工学院,江苏徐州221116 [2]江苏亿亿和华筛分设备有限公司,江苏徐州221116 [3]矿物加工科学与技术国家重点实验室,北京102628

出　　处：《有色金属（选矿部分）》2024年第10期12-21,27,共11页Nonferrous Metals（Mineral Processing Section）

基　　金：国家杰出青年科学基金资助项目(52125403);国家自然科学基金资助项目(52404303,52261135540);矿物加工科学与技术国家重点实验室开放基金资助项目(BGRIMM-KJSKL-2024-20);在徐高校服务“343”产业发展项目(gx2023004)。

摘　　要：筛分是有色金属选矿过程的关键环节,筛面是筛分过程进行的重要载体,筛面的材料特性设计是提高筛分效率的有效手段,但在工业生产中由于浇筑工艺、检测手段等技术限制,难以对筛面材料特性进行精确设计。基于此,本研究提出了基于DEM-FEM的弹性筛面材料特性动态设计方法,构建了钛铁矿颗粒筛分过程DEM-FEM耦合仿真计算模型,以不同筛面材料特性下筛面冲击应力以及物料透筛效果为设计准则,通过动态设计确定了钛铁矿3 mm筛分最佳弹性筛面材料参数组合:材料常数C_(10)为1.76、C_(01)为0.44,弹性模量为13.23 MPa,密度为1.30 g/cm^(3)。最后,在HEWA3060筛机上装配实体新型筛面,进行筛面振动特性测试以及3 mm工业筛分验证试验,当筛机处理能力为12 t/(h·m^(2))时,筛分效率达到92.14%,本研究对弹性筛面的关键材料特性设计具有重要指导意义。Screening is a key step in the process of non-ferrous metal beneficiation,and the screen plate is an important carrier for the screening process.The design of the material characteristics of the screen plate is an effective means to improve screening efficiency.However,in industrial production,due to technical limitations such as pouring technology and testing methods,it is difficult to accurately design the material characteristics of the screening plate.Based on this,this study proposes a dynamic design method for elastic screen plate material characteristics based on DEM-FEM,and constructs a coupled simulation calculation model for screening of fine grained ilmenite particles using DEM-FEM.The design criteria are the impact stress and the material screening percentage of the screen plate under different screening plate material characteristics.The optimal combination of the elastic screen plate material parameters for 3 mm screening of ilmenite is determined through dynamic design:material constants C_(10)is 1.76 and C_(01)is 0.44,elastic modulus is 13.23 MPa,and density is 1.30 g/cm^(3).Finally,a solid new screen plate was assembled on the HEWA3060 screening machine for vibration characteristics testing and 3 mm industrial screening verification experiment.When the screening machine processing capacity was 12 t/(h·m^(2)),the screening efficiency reached 92.14%.This study has important guiding significance for the design of key material characteristics of elastic screen plates.

关 键 词：干法筛分 耦合仿真 动态设计 工业试验 

分 类 号：TD921.3[矿业工程—选矿]