Gasification with separate calcination
AssigneeFLSmidth A/S
InventorKlaus Hjuler
Life of this patent
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Abstract
A method and an apparatus for manufacturing of cement includes cement raw meal being preheated in a preheater, calcined in a calciner by contact with hot gases which are introduced into the calciner via a gas inlet and being diverted from the calciner via a gas outlet, and where calcined cement raw meal is diverted from the calciner, burned into cement clinker in a kiln and subsequently cooled in a clinker cooler. At least a portion of the calcined cement raw meal diverted from the calciner is heated further in a separate system to a temperature which exceeds the calcination temperature and is subsequently recirculated to the calciner. That at least a portion of the gases which are diverted via the gas outlet of the calciner is removed from the plant with a view to storage underground or other additional treatment.
Claims16
A method for manufacturing cement comprising:
- preheating cement raw meal in a preheater,
- calcining the cement raw meal in a calciner via contact with hot gases which are introduced into the calciner via a gas inlet and are diverted from the calciner via a gas outlet,
- diverting the calcined cement raw meal from the calciner,
- burning the cement raw meal into cement clinker in a kiln,
- cooling the cement raw meal in a clinker cooler, and
- wherein at least a portion of the calcined cement raw meal diverted from the calciner is heated further in a separate apparatus to a temperature which exceeds a calcination temperature of the diverted calcined cement raw meal and is subsequently recirculated to the calciner, and
- wherein at least a portion of the gases which are diverted via the gas outlet of the calciner is removed for storage underground or for other additional treatment.
Dependencies are inferred from the claim text.