Abstract:Aiming at the issues of high energy consumption in mechanical ore crushing and insufficient theoretical foundations for improving crushing efficiency, this study investigates the strength characteristics of quasi-dynamic crushing of irregular ore particles. By conducting drop weight impact crushing tests on irregular iron ore particles with varying properties, the size effect, shape effect, and loading rate effect on the quasi-dynamic crushing strength of irregular iron ore particles are investigated. Furthermore, the relationship between crushing strength and and fragmentation degree parameters is systematically established. The results demonstrate that the crushing strength of irregular iron ore particles decreases with the increase of initial size, and the magnitude of the decrease tends to decrease, showing a logarithmic function relationship between the two. As the sphericity of the particles increases, the crushing strength increases linearly. As the loading rate increases, the average crushing strength increases in the form of a logarithmic function. The impact of crushing strength of irregular iron ore particle on the degree of crushing is significant. As the crushing strength increases, the average particle size of the fragments decreases in the form of a negative power function, and the crushing ratio increases in the form of a logarithmic function, but the rate of change gradually decreases. The research findings provide a theoretical foundation for mineral processing plants to improve technical equipment, optimize process parameters in crushing and grinding operations, and achieve systematic transformation of energy conservation and consumption reduction in ore comminution systems.