关键词: 高压辊磨机, 离散单元法, 多体动力学, 联合仿真, 模型对比

Abstract: Aiming at the problems of the commonly used mathematical models and the current discrete element simulation models in predicting the processing capacity,unit energy consumption and crushing ratio of high-pressure grinding rolls (HGPR) with large errors,this paper proposes the simulation modeling analysis of HGPR using the co-simulation technology of discrete element method ( DEM) and multi-body dynamics ( MBD). Taking the KHD375ϕ1400-1000 HGPR used in Sanshandao Gold Mine,Shandong Gold Mining (Laizhou) Co. ,Ltd. ,as the research object,the key simulation parameters are set according to the relevant theory and actual equipment operation parameters,and the co-simulation is carried out by EDEM and MotionView. The simulation results are compared with the mathematical model,single EDEM simulation model and the actual operation data of the mine. The results showed that the DEM-MBD co-simulation model can simulate the operation of the HGPR more realistically and accurately. Compared with the DEM simulation model,the DEM-MBD co-simulation model reduces the error values of processing capacity,unit energy consumption and crushing ratio by 13. 41,38. 10 and 6. 74 percentage points respectively,which effectively reduces the error values of the existing simulation model. The study also provides a reasonable reference for the simulation of such complex crushing equipment,which has some engineering application value.

Key words: high-pressure grinding rolls,discrete element method,multi-body dynamics,co-simulation,model comparison