Grating of selfgrinding machine based on the theory of weir flow and screening
                                                 GONG Meng, DONG Weimin, SUN Shanshan, CHU Liang, DAI Jianhua
                       (Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China)

Abstract: Aiming at the selfgrinding grid plate exhaust efficiency is obviously insufficient and the life of the grid plate can not fully meet the production demand, which leads to the problem of large concentration of ore particles in the selfgrinding barrel，the discrete element method was applied as the basis of the simulation of selfgrinding machine, and compared the common rectangular concentric type grid plates with the rectangular radiation type grid plates. The weir flow and screening theory was introduced to design the grid plate. Finally, the waveform oblique grid type with high exhaust efficiency and good wear resistance was designed.The situation of lattice plate wear was quantitatively analyzed by the Archard wear wear model. The equivalent stress and its distribution of the grid plate were analyzed by the method of EDEM and ANSYS coupling. The results indicate that the ore retention of the front end of the waveform oblique grid plate lifting strip is less, the discharge amount is improved greatly, the wear amount is reduced greatly, and the stress concentration is reduced greatly during the operation, which has better stability.

Key words: selfgrinding machine; grating; row of ore; wear extent