DEVELOPMENT OF THE MATHEMATICAL MODEL OF GRANULATED MATERIAL MOVEMENT IN FLAT MATRIX GRANULATOR SPINNERETS

Abstract

The PURPOSE of the paper is to consider the formation of granules from dispersed materials of various nature and aggregate state under their processing in granulators with a flat press matrix; to develop a mathematical model of motion of elastic viscous plastic and fiber-containing dispersed materials in the formation channels (spinnerets) of different cross-sections when processing these materials in granulators with a flat press matrix. MATERIALS AND METHODS. The following procedure is used when developing a mathematical model of material movement along the spinneret: an elementary layer is identified in the volume of material in the forming channel. Then an equilibrium equation of the identified elementary layer is constructed with the allowance for all the forces acting on it and the obtained equilibrium equation is solved. RESULTS. A detailed description is given to the movement of the dispersed visco-elastic plastic and fiber-containing (fibrous) material along the channels of spinnerets of constant and variable cross-sections of granulators with a flat matrix. A mathematical model of the process is developed. The obtained models are compared on the example of fiber-containing charge for the production of granular stabilizing additives of crushed stone-mastic asphalt concretes. CONCLUSIONS. The developed mathematical model can be used in calculations of extrusion type granulation equipment parameters, in particular in flat-matrix granulators of technological lines for the production of granular stabilizing additives of crushed stone-mastic asphalt and for further theoretical and experimental studies.