期刊论文

Zhang, Chunyang

英文

Powder Technology

0032-5910

2018

327

291-302

10.1016/j.powtec.2017.12.077

The flowability problems of particles are studied by the Distinct Element Method (DEM). FFC2D models the movement and interaction of stressed assemblies of rigid circular particles using the Distinct Element Method. According to the theory and background of PFC2D, the force-displacement law derives the contact force acting on two entities in contact to the relative displacement between the entities, the contact force is decomposed into a normal component acting in the direction of the normal

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Arching, blocking, and sticking might be frequently encountered in hopper. Studies are carried out in order to solve these problems in Luoyang Bauxite Mine, China. The results of similarity model tests show that factors affecting flowability of particles are mainly friction and cohesion, when the moisture content changes from 82% to 10.8%, the influence of friction and cohesion on the flowability of particles becomes increasingly unfavorable, particles are easier to stay in the corners. In addition, the discharge effect is also affected by friction coefficient of the inner wall. In the numeric...