C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
53/32, 39/53
C21B 13/02 (2006.01) C21B 13/00 (2006.01) C21B 13/06 (2006.01)
Patent
CA 1108865
ABSTRACT OF THE DISCLOSURE A method and apparatus for the direct reduction of iron ore are dis- closed. A mixture of iron ore, solid carbonaceous fuel and, if sulfur is present, calcined limestone or dolomite, are used. The carbonaceous materi- al can be cellulosic material (wood waste, paper, particularly municipal trash, garbage, etc.), charcoal, or coal (preferably sub-bituminous coal or lignite). The above feed is continuously charged into a gasification and initial reduction zone of a shaft furnace which is partitioned partially from the remainder of the furnace. Oxygen and hot steam are introduced into the upper portion of the said zone. Partial combustion or pyrolysis of the fuel and reaction with steam take place, producing reducing gas which initi- ates reduction of the iron ore. Ore and gas flow downwardly through con- duits into the final reduction zone. Meanwhile, hydro gen-enriched reducing gas is introduced in the middle of the final reduction zone. Top gas is withdrawn from the upper open space of the final reduction zone, drawing re- ducing gas downwardly from the gasification and initial reduction zone and upwardly through the final reduction zone. In addition, top gas is withdrawn from the bottom of the final reduction zone. Reduction of the iron ore to sponge iron is completed in the final reduction zone. A portion of the with- drawn top gas is cooled, purified of dust, carbon dioxide and sulfur and de- humidified, then introduced near the bottom of the shaft furnace. It ascends, cooling and carburizing the sponge iron descending from the final reduction zone and becoming heated. The cooling gas is then withdrawn from the bottom of the final reduction zone. A special form of discharge grate discharges iron successively from different areas, so as to produce agitation and mixing.
321930
Hsieh Jack
Hsieh Jack
Swabey Ogilvy Renault
LandOfFree
Method and apparatus for the direct reduction of iron ore does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for the direct reduction of iron ore, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for the direct reduction of iron ore will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-195619