Chapter 16 Numerical Investigation of Particle Breakage as Applied to Mechanical Crushing

Publisher Summary This chapter presents the numerical approaches to show that the realistic failure process analysis code (RFPA 2D ) provides a powerful tool in quantitatively simulating the micro as well as macro-behavior of particle breakage observed in laboratory tests. From the single-particle breakage studies, the chapter demonstrates that the behavior of particle breakage is strongly dependent on the loading conditions. Mechanical crushing is widely used in both the aggregate-producing industry and the mineral industry. Breakage is the way a particle is broken into smaller fragments. Recently, some researchers have focused their attention on the comminution process from the size reduction point of view. However, although widely used, mechanical crushing is a complex process that is not understood very well in spite of the research effort that has been devoted to this topic for more than a century. Traditionally, the understanding of single-particle breakage is based on the knowledge obtained in indirect tensile strength tests of particles. Moreover, the rock particles are often obtained from bedrock. Thus, mechanical tests on the parent rock can also give an indication of the likely breakage properties of the particles.

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