Abstract:XCF type flotation machine is often used as a suction tank in actual production, which is responsible for sucking in the mineral slurry. The strong collision between the inhaled mineral particles and the internal components of the flotation machine will cause wear on the surface of the impeller, stator and central cylinder, leading to the problems of reduced flotation efficiency and increased cost. In order to investigate the solid-liquid two-phase flow pattern in the flow field of the flotation machine as well as the abrasion of different key components, this study investigates the relationship between the abrasion of the impeller, stator, and central cylinder of the flotation machine and the concentration of the slurry as well as the particle size by means of CFD numerical simulation method. A discrete phase model (DPM) was used to simulate the flow field in the flotation machine under different slurry concentrations and particle sizes to investigate the wear of different components with different slurry concentrations and particle sizes. The results show that the particle size and slurry concentration have a significant effect on the wear of the impeller and stator, in which the wear of the impeller, stator and central cylinder increases with the increase of slurry concentration. The larger the particle size, the lower the wear degree of the impeller and stator, and the higher the wear degree of the centre cylinder. The wear occurs mainly on the surface of the upper blade of the impeller and the bottom plate, and the edge of the upper blade of the impeller is the most serious, the wear of the stator is mainly concentrated on the flow surface and the height of the upper blade of the impeller, and the wear of the central cylinder mainly occurs on the inner wall. This study provides an important reference for the optimisation of the operating parameters of the flotation machine, which helps to extend the service life of the equipment and improve the process efficiency.