Investigation On The Mechanism Of Rigid-granular Coupling In Eccentric Vibration Mill With Double Rigid Bodies

For sustainable economic development, which is the necessary choice for our country,the research on energy-intensive industry will continue. Among them, the study which baseon rigid-granular coupling is one field to improving mill and saving energy. Meanwhile, thematerial crushing’s research play an important in the national economy. There is few studiesin this field, due to particle’s complexity and discontinue. Low energy region existent invibration mill, which resulting uneven distribution of particle size and restrict large-scalemill. Therefore, the research on mill has practical significance.Discrete element theory provides support for the study of mill-material’s coupling.This paper base on discrete element theory and rock crushing mechanism, using PFC3Dmodel, in order to complete simulation the process of mill crushed rock. From the processof rock into mill to rock is crushed, analyzing ball’s motion and force, grinding experiment,mill’s trace and force, mill’s energy distribution, useful power, and rock crushing condition.Making following conclusion, from the five aspects of crushing force, product size, thenumber of bond breaking, particle’s velocity and force:(1) Establishing realistic simulation model through PFC3D, obtained mill energydistribution agree with the actual conditions;(2) Force on rock material, energy’s accumulated focus on vertical, horizontaldirections. Accumulating energy to break the its balance is consistent with the mechanism;(3) The energy which is mainly used for material crushing has boundary work, kineticenergy, body energy and friction energy;(4) Spatial distribution of crack has two kinds of pull, shear, crushed particle withhigh-speed impact;...