Method for introducing a granular ore into a roasting kiln
OwnerMichael Ströder, Horst Zingrebe +1inventors
InventorsMichael Ströder, Horst Zingrebe, Hubert Vollmer
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Abstract
Granular ore or ore concentrate is charged into a furnace for calcining the ore at temperatures of 400 to 1050° C., the ore forming a stationary fluidized bed in the furnace. The ore is thrown onto the fluidized bed through an opening in the furnace housing disposed above the fluidized bed, the ore being accelerated by blades of a rotating impeller. The impeller is disposed outside the furnace in the vicinity of the opening of the housing. Preferably, the rotational speed of the impeller is variable, and the impeller is movable and/or pivotable with respect to the furnace.
Claims6
A method of operating an ore-calcining furnace, comprising the steps of:
- introducing granular ore into a furnace for calcining the ore at temperatures of 400 to 1050° C.;
- maintaining a stationary fluidized bed of the ore in the furnace;
- throwing said ore onto the fluidized bed through an opening in a housing of the furnace housing disposed above the fluidized bed;
- and
- accelerating the ore by blades of a rotating impeller which is disposed outside the furnace directly in the vicinity of the opening.
Dependencies are inferred from the claim text.