Equipment for and method of precalcining any mineral materials whatsoever
AssigneeCle
InventorMaurice Paliard
Life of this patent
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Abstract
An equipment for precalcining any mineral materials whatsoever comprising a precalciner consisting of a combustion chamber communicating through a passage-way with a reaction chamber itself communicating via a duct with a separation cyclone, the reaction chamber being fed with smokes issuing from a firing furnace and three ducts feeding with hot air issuing from a cooler the combustion chamber, a voluted casing at the level of a burner and said duct, respectively, the equipment in particular permitting the manufacture of cement clinker while greatly minimizing the emission of nitrogen oxides.
Claims12
An apparatus for precalcining a powdered mineral material, comprising
- a combustion chamber,
- a burner for feeding fuel into said combustion chamber,
- means for feeding a mineral material into said combustion chamber,
- a reaction chamber in which precalcination occurs,
- a passageway connecting said combustion chamber and said reaction chamber and through which combustion gas and the mineral material are passed from said combustion chamber to said reaction chamber,
- a separation cyclone for separating the combustion gas from the mineral material precalcined in said reaction chamber,
- a post-combustion duct arranged between said reaction chamber and said cyclone through which gases and precalcined mineral material are passed from said reaction chamber to said cyclone,
- a firing furnace into which the precalcined material is passed from said cyclone,
- means for feeding gases to said reaction chamber, said gases having a high nitrogen oxide content and being discharged from said firing furnace,
- a first duct arranged to pass hot air into said combustion chamber,
- a second duct for feeding hot air into said combustion chamber in proximity to said burner, and
- a third duct arranged to pass hot air into said post-combustion duct between said reaction chamber and said cyclone.
Dependencies are inferred from the claim text.