Regenerative shaft furnace for burning carbonate-containing raw materials
AssigneeMaerz Ofenbau AG
InventorErwin Fussl
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Abstract
A regenerative shaft furnace for burning carbonate-containing raw materials is disclosed having two or more shafts which are interconnected by ducts which operate in an alternate manner and wherein the burned raw material is cooled in the cooling zone of the shafts. Having a displacer in the cooling zone to prevent the reabsorption of carbon dioxide in the fuel gases by the burned material. A method for burning carbonate-containing raw material is also disclosed.
Claims8
In a regenerative shaft furnace for burning carbonate-containing raw materials with two or more shafts, the walls of which form cooling zones therein, interconnected by ducts which operate in an alternating manner so that one shaft operates as the burning or parallel flow shaft and the other as the counterflow shaft wherein the burned raw material is cooled in the cooling zones of the shafts, the improvement which comprises said furnace having a displacer fitted into the cooling zone of each shaft, said displacer being arranged in the center of each shaft, and wherein the cooling zone loading, determined as a quotient of the production of burned raw material each day and the volume of the cooling zone of the shafts, is 3 to 6 t/m.sup.3.
In a method for burning carbonate-containing raw materials in a shaft furnace containing two or more shafts interconnected by ducts wherein the raw material is introduced into the top of one of said shafts, is preheated, burned to expel CO.sub.2 cooled in a cooling zone and removed from the bottom of the shaft and the shafts operate alternatively as the burning or parallel shaft and the other as the counterflow shaft, the improvement which comprises the cooling zone of each of the shafts having a displacer therein, said displacer being arranged in the center of each shaft, and wherein the cooling zone loading, determined as a quotient of the production of burned raw material each day and the volume of the cooling zone of the shafts, is 3 to 6 t/m.sup.3.
Dependencies are inferred from the claim text.