ROTATING FURNACE Russian patent published in 2003 - IPC

FIELD: industry of building materials, in particular, devices for production of expanded clay aggregate. SUBSTANCE: the rotating furnace has a steel lined body with a preheating area in the form of a cylindrical section and with a bulging area consisting of a section in the form of a truncated cone, whose larger base is positioned towards material motion. The annealing area is made in the form of a truncated cone, whose smaller base is positioned in the area of material unloading, all three furnace sections are rigidly interconnected, and the length of the conical section of the annealing area makes up L₃ = (8-12)×(D-d); the length of the conical section of the bulging area makes up L₂ = (3-6)×(D-d), and the length of the cylindrical section of the thermal preparation area makes up L₁ = (1,3-1,6)×(L₂+L₃), where D and d - inside larger and smaller furnace diameters, respectively. EFFECT: enhanced capacity of production of expanded clay aggregate and enhanced its quality. 1 dwg