Particles motion simulation and application exploration of three-stage cone water-only cyclone

Abstract

ABSTRACT In this study, the particle motion simulation and application exploration of three-stage cone water-only cyclone (TWOC) were performed. The discrete phase model was applied to simulate the particles motion during the separation process of TWOC. The particle distribution curve of light products of TWOC obtained by the simulation is well consistent with that of the validation experiment, demonstrating the credibility of the particles motion simulation. The separation characteristic of this cyclone was clarified. The cone part is the main separation region, and the axial separation position of particles is deepened with the growth of the particle density. The “T-F” flow, consisting of the TWOC separation and flotation, was designed to separate the coal-slime efficiently. The separation experiments indicate that the pyrite sulfur rejection rate and the ash rejection rate of the NO.1 experiment are all greater than 79.00%. The “C-T-F” flow, consisting of the crushing process and the “T-F” flow, was designed to improve the desulfuration performance of the high-sulfur lump-coal. The crushing size was determined as 3 mm, and the pyrite sulfur rejection rate of the “C-T-F” flow is greater than 90.00%. The superiorities of the two separation flows promote the practical application of TWOC.