STUDY OF MOORING BODY MOVEMENT IN THE MILLING PROCESS USING THE DISCRETE ELEMENTS METHOD
Wladmir José Gomes Florêncio1; Neilor Cesar dos Santos1
1 Instituto Federal da Paraíba
doi:10.20906/CPS/CILAMCE2017-0926
Resumo
In this work the simulations of the movement of the grinding bodies together with ore inside a laboratory scale ball mill were used, using the Discrete Element Method (MED) with the coefficient of friction μ = 0.51 and with Mill operating at 57%, 60%, 65%, 70%, 75% and 80% of its critical speed. The behavior of the dynamics of the milling process was observed from experiments carried out in the laboratory, where a grain size distribution was obtained for the meshes of + 30 #, + 50 # and + 80 #, where their displacements were analyzed for the 30s, 180s, 300s, 360s, 480s and 600s and compared them with those obtained by the 2D computational simulation performed in the DEMpack® simulation software. The presence of cascade and cataract regimes was observed in the simulations, which was possible due to the variation of the critical velocity of the mill even with a degree of filling (J) of approximately 50%. Due to the existence of the two operation regimes: cascade and cataract in the milling, there was a difference in the particle size distribution in part of the experimental grinding.
Palavras-chave: Ball Mill; Grinding; Method of Discrete Elements