Method and installation for reducing orefines in a multi-stage suspension gas stream using a cyclone separator
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United States of America Patent
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Apr 25, 2006
Grant Date -
N/A
app pub date -
Sep 26, 2000
filing date -
Dec 15, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to the reduction of fine ores, whereby in a multi-stage gas suspension preheater the fine ores are preheated, calcined and then reduced in at least one lowest heat exchanger stage with the addition of a reducing agent in a delivered hot gas stream. The principal part of the reducing heat treatment of the fine ores is carried out in a reactor loop constructed in the lowest heat exchanger stage of the gas suspension preheater. The reactor loop has an uptake conduit section and a curved section adjoining the uptake conduit section and with which the reactor loop opens into at least one precipitating cyclone which is disposed downstream and for this purpose a hot reducing gas is introduced into the rising hot gas stream.
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