METHOD OF FIRING PELLETIZED MATERIAL IN ROTARY FURNACE Russian patent published in 1996 - IPC

FIELD: methods of firing different pelletized materials, particularly in building material industry, chemical industry and metallurgy. SUBSTANCE: method comprises steps of mixing air with temperature 120-250 C from the last stage of cooling product with exhaust gases, emitting from zone of layer-by-layer combustion of solid fuel; feeding the mixture had been received to layer of drying zone for drying and heating up the material. Thermic efficiency consists 84.5-84.7 %. EFFECT: increased thermal efficiency. 1 cl, 1 dwg, 3 tbl