Calculation of the Parameters of the Grinding Load in a Ball-Tube Mill for the Production of Construction Materials: Fid-Bau Portal

Calculation of the Parameters of the Grinding Load in a Ball-Tube Mill for the Production of Construction Materials

Bogdanov, V. S. / Bogdanov, D. V. / Sychev, E. A. / Karachevtseva, A. V.

The paper deals with the main construction materials used in the construction, repair and reconstruction of buildings and structures, which include gypsum, lime, and clinker. Obtaining building materials is associated with technological processes, grinding is the most energy-intensive of them. Grinding of construction materials is carried out in ball-tube mills, the design of which is constantly being improved. The new design of the ball-tube mill is equipped with an inclined partition. The grinding bodies in the new scheme of the ball-tube mill, unlike conventional designs, move not only in the cross section of the crushing cylinder, but also in the longitudinal direction, which significantly affects the kinetics of motion. The fundamental differences in the kinematics of motion, velocity and energy modes of grinding bodies during the cycle compared to conventional ball-tube mills are considered. The calculation diagrams and graphical results of calculations are given: the coordinates, velocities and inertia of the ball at the moment of its collision with the mill crushing cylinder and the energy value of the ball under the conditions of its cross-longitudinal motion. The characteristic sections of the phases of motion of grinding bodies during the full cycle of rotation of the crushing cylinder and the behavior of grinding bodies in each of the sections is considered. The most effective zones of the work of grinding bodies are indicated. A comprehensive analysis of the loading operation is given. The main difference between the kinetics of motion of grinding bodies in a mill with an inclined chamber partition from conventional ball-tube mills, consisting in different values of the angle of incidence, velocity and energy of the ball at the same angle of separation, is considered. The generalizing conclusions of the energy and speed parameters of the ball-tube mill in the grinding of construction materials are made.