Mesoscopic Mechanism of Fluidization for Bulk Iron Ore Concentrates Based on Model Test

Abstract:

A shaking table model test was carried out to study the mesoscopic mechanism of fluidization for iron ore concentrates in bulk under dynamic loading. By means of micro visualization system, meso evolutions of granular fabric were investigated including orientation of particle long axis, average coordination numbers and porosity. And the interaction between particles and water during the fluidization was analyzed. Then, the connection between meso mechanism and macro phenomenon was discussed. The results show that the water transfer, namely, the rising of water level, is important in the fluidization of iron ore concentrates. The mesoscopic fabric of iron ore concentrates, which is consistent with macro phenomenon, is an important parameter for the control of macroscopic mechanical behavior of iron ore concentrates.