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STUDY OF THE CONJUGATE SOLUTION OF ROCKY DEM AND ANSYS FLUENT SOFTWARE FOR MODELING THE SINGLE-PHASE FLUID-SOLID SYSTEM FOR FURTHER MODELING OF GRINDING PROCESSES

А. С. Опалев, A. A. Palivoda

Abstract

At the present time, the grinding efficiency of minerals is a topical issue for the mining industry, since the grinding process is the most energy-consuming one. For each granulometric composition of the grinded material and grinding bodies, as well as for a number of other factors, there is a certain dependence, which should meet the highest efficiency of the grinding process. The creation of grinding models using modern technologies will contribute to improvement of the grinding equipment in order to reduce the energy consumption and enhance the quality of the obtained materials. The authors have modelled the motion of the medium in a ball mill using the Discrete Element Method (DEM). Many processes in the mining industry are related to the movement of particles in a fluid flow, e.g., the wet grinding process in a mill is modelled by computational fluid dynamics (CFD).The purpose of this paper is to study the potential application of the conjugate DEM-CFD approach to model fluid-particle systems and to apply the results for modelling wet grinding in ball mills. The paper gives the results of the conjugate DEM-CFD approach: velocity data of each individual particle with respect to any of the axes; position of particles with respect to the axes; trajectories of particles over the whole modelling period; dependence of the maximum absolute progressive velocity of particles. A graphical representation of the interaction of upward fluid (water) flow with solid particles was obtained.

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DOI resolver: doi.org/10.5593/sgem2021/1.1/s04.074

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