Interpretation and optimization of vertical shaft crushers with DEEM

TL;DRAbstract

This paper presents a new approach called DEEM (Discrete Equivalent Element Method) to simulate rock crushing. The method is based on particle simulations (Discrete Element Method) and external data-based information. Based on extensive lab testing detailed information about the crushing process were obtained and stored in a data base. These are the impact force, the impact contact time, grain size distribution after crushing and energy consumption. These data were obtained for individual single pieces of rock (grains) of different size and shape. In parallel a numerical 2D vertical shaft crusher model based on the particle code PFC2D was set-up. This model was connected with the external data base, which contains all the data from the single grain lab crushing tests. During the numerical simulations several parameters like the individual impact forces, the impact contact times, the impact types, the particle velocities, the impact angle etc. were recorded. These data were compared wit

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