Method and apparatus for drying iron ore pellets
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United States of America Patent
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-
Jul 23, 2002
Grant Date -
N/A
app pub date -
May 8, 2001
filing date -
May 8, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the present method of drying iron ore pellets, e.g., magnetite pellets, moisture-containing iron ore pellets are formed into a bed comprising a multiplicity of the pellets. A current of drying gas is forced through the bed of pellets to at least partially dry some of the pellets. At least one jet of a drying gas that contains added oxygen is directed onto the bed of pellets so to impinge upon a surface of the pellet bed thereby providing kinetic energy for directing oxygen including the added oxygen into the pellets so as to enhance the conversion of magnetite to hematite. Moisture can be added to heated air that is then blown through jet nozzles onto the pellet bed or circulated back to an earlier drying stage and passed through the bed.
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