Method for introducing a granular ore into a roasting kiln
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United States of America Patent
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-
Jul 12, 2005
Grant Date -
Apr 1, 2004
app pub date -
Nov 27, 2001
filing date -
Dec 6, 2000
priority date (Note) -
In Force
status (Latency Note)
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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.
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