Experimental Study of the Crushing Characteristics of Single Particle Materials

The crushing process of material particles in a vertical shaft impact (VSI) crusher is highly complex. It is hard to quantify and characterize the crushing behavior of particles. In this work, an experimental setup for active impact crushing is designed and constructed to investigate the crushing behavior of particles in a VSI crusher. Impact crushing experiments are carried out on limestone particles using this device to investigate the effects of impact velocity and particle size on the crushing probability as well as the size distribution of the crushed products. The results show that the crushing probability of particles is related to the impact energy and particle size, and the strength of particles increases with the decrease of particle size. The t_n-t₁₀ particle size distribution prediction model is established through regression analysis of crushing experimental data, and a family of t_n curves is constructed for the particle size distribution of crushed products, and the experimental validation of the particle size distribution prediction model is able to predict the size distribution of the crushed products very well. This study offers a theoretical foundation for optimizing material crushing in VSI crushers.