The present work deals with the discrete element method for bulk solids in conveyor technology. The beginning of the work is a briefly description of the structure and function of DEM. In this part will be described in addition to the calculation cycle also other points, which includes the different particle models and contact models and the determination of the length of the time step. The problem of DEM is to determine the material parameters in the simulation. The accuracy of DEM models depends largely on the choice of this parameters. But in most cases, these parameters are unknown, since for each application an individual particle model is used. The aim of this work is to determine the unknown parameter values of bulk materials for the simulation. This will be done by using a test facility by observing the bulk behavior. Mechanical and geometrical properties should be observed. These results serve as a comparison with the results of DEM simulations. The deviation of the results in the simulation from the results of the real experiment should not be more than 10%. Urea and edge grain with a grain size of 4/8 are used as examined bulk material. The simulations are performed using EDEM Academic 2.4 by the company DEM Solutions. The presettable parameters for the simulation are divided in known and unknown parameters. With the unknown parameters an experimental design is created, to establish a mathematically sophisticated set of simulations. This is required to analyze the overall behavior of the system and to optimize the parameters efficiently. With the optimized parameters, simulations are performed again and compared with the results of the laboratory experiment. Finally, three validation experiments have been carried out in order to get an accurate assessment of the determined particle models.