Shows how the relative mass fraction of the particles of crushed material, get to corresponding fraction. It is shown that the most complete and informative characterization of the grinding process in a ball mill is a grinding matrix taking into account the transformation of grain composition inside the mill drum. Noted that the main task of modeling the grinding process is predicting the granulometric composition of the finished product taking into account constructive and technological parameters used ball mill and separator. The questions of Portland cement clinker grinding in closed circuit ball mills. In the article attention is paid to improving the efficiency of production of fine powders, in particular Portland cement clinker. Matrix model of the grinding process of cement clinker in the ball mill In addition the imaging of motion patterns inside a planetary ball mill from simulations and video recordings is shown. The simulations illustrate the effect of the geometry of planetary ball mills on the energy entry. Thus numerical simulations based on a discrete-element-method are used to describe the energy transfer to give an adequate description of the process by correlation with experiments. The amount of energy transferred from the milling tools to the powder is significant and hardly measurable for processes in planetary ball mills. It gives examples of the aspects of grinding and illustrates some general guidelines to follow for modelling processes in planetary ball mills in terms of refinement, synthesis' yield and contamination from wear. The present review focuses on the insight into several parameters like properties of grinding balls, the filling ratio or revolution speed. Processes inside planetary ball mills are complex and strongly depend on the processed material and synthesis and, thus, the optimum milling conditions have to be assessed for each individual system. Planetary ball mills are well known and used for particle size reduction on laboratory and pilot scales for decades while during the last few years the application of planetary ball mills has extended to mechanochemical approaches. Process engineering with planetary ball mills.īurmeister, Christine Friederike Kwade, Arno