Method and apparatus for reducing an iron oxide material in a fluidized bed
AssigneeStora Kopparbergs Bergslags AB
InventorsPer H. Collin, Erik A. Bengtsson
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Abstract
A method is suggested for the reduction of finely-divided iron oxide in a fluidized bed, with the air of reducing gases formed by partial combustion in the bed of finely-divided carbonaceous material by gas containing molecular oxygen, which is supplied through nozzles (4). The exterior surface of the nozzles is cooled to a temperature lower than 200.degree. C below the melting point of the reduced metal. In this way the particles of the reduced iron are prevented from adhering to the nozzles.
Claims8
A method for the reduction of finely-divided iron oxide material in a fluidized bed reactor by means of reducing gases formed at the partial combustion of finely-divided carbonaceous material in the fluidized bed by a gas containing molecular oxygen, said gas being supplied to the fluidized bed through nozzles extending into the fluidized bed a distance at least twice the diameter of the nozzle, comprising:
- cooling the opening and the exterior surface of the nozzles to a temperature lower than 200.degree. C. below the melting point of the reduced metal, the nozzles being thus cooled along a distance from their opening which is at least twice the inside diameter of the opening, by means of a coolant flowing through a cooling jacket.
Dependencies are inferred from the claim text.