Movement of granulated mineral raw flow upon firing in the rotating furnace

The behavior of a material layer in a rotary kiln is considered from the perspective of continuum mechanics. The change in the bulk density of the material layer is considered depending on the temperature in the zones of the furnace. It was revealed that under the influence of physical and chemical elementary processes occurring in the granules of mineral raw materials, surface forces arise in the material layer, which significantly affect the speed of the translational motion of the granules along the length of the furnace. It was found that the material layer of the fired granules along the length of the furnace moves in a wave-like manner (Riemann waves). Various geometrical profiles of rotary kilns are evaluated. Il. 2, bibliography: 1 title.