FIELD: furnaces and ovens.
SUBSTANCE: invention relates to a method of controlling production of hydraulic binder in a rotary burning furnace having a substantially cylindrical shape with a longitudinal axis inclined relative to the horizontal, upper end, lower end and substantially cylindrical wall, wherein furnace length is at least 9 times larger than furnace diameter and, preferably, 9–40 times larger than furnace diameter, wherein the furnace is rotatable about a longitudinal axis and comprises a burner unit located at its lower end and intended for injection into the furnace of the main fuel and primary oxidising agent for combustion. Method comprises continuous supply to furnace at its upper end of material to be pyro processed, with its downward movement through furnace, wherein said material is subjected to pyro processing in furnace by heat generated during combustion of main fuel in furnace, and leaves furnace at its lower end in form of material, which has undergone pyro treatment, supplying material that has undergone pyro-treatment from the furnace to an air-cooled material cooler to obtain cooled material subjected to pyro-treatment, and hot air, injection into furnace by means of burner unit of main fuel and primary oxidiser for combustion so that to cause partial combustion of main fuel with primary oxidant for combustion, supplying to furnace at its lower end of hot air from cooler of material as secondary oxidiser to ensure, in fact, complete combustion of main fuel, wherein flame of flame formed in continuous combustion of main fuel with primary and secondary oxidants is directed substantially parallel to longitudinal axis of furnace, and removing flue gas from the furnace at its upper end, wherein the longitudinal temperature profile of the interior of the furnace is varied by injecting into the furnace at least one fluid other than the primary fuel, the primary oxidant and the secondary oxidant, preferably in the form of gaseous or liquefied oxygen or air enriched with gaseous or liquefied oxygen, wherein variation of the longitudinal temperature profile is ensured by continuous or intermittent variation of at least one injection parameter of said fluid into the furnace.
EFFECT: reduced formation of localized deposit rings in furnace, higher efficiency of furnace and stable operation of furnace.
13 cl, 7 dwg, 1 ex
