C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
C21B 13/00 (2006.01)
Patent
CA 2302267
The invention relates to a method and a device for extracting iron by direct reduction, characterized in that the device has a separate reduction chamber in which the carbon is gasified and the iron oxide is reduced in close proximity, and a separate combustion chamber in which surplus reduction gases are burned and heat energy is yielded. According to the invention, the hot combustion gases pass on their heat energy to the reduction gases in a heat exchanger, so that this energy is transferred to the reduction gases effectively. The reduction gases are force-circulated through the heat exchanger and through the carbon /bed of ore for this purpose.
L'invention concerne un procédé et un dispositif pour l'extraction de fer par réduction directe, procédé caractérisé en ce que le dispositif comporte une chambre de réduction séparée dans laquelle le charbon est gazéifié et les oxydes de fer sont réduits à proximité immédiate, et une chambre de combustion séparée dans laquelle les gaz de réduction excédentaires sont brûlés et de l'énergie thermique est produite. Selon l'invention, les gaz de combustion chauds transmettent leur énergie thermique aux gaz de réduction dans un échangeur thermique, afin de permettre le transfert effectif de cette énergie aux gaz de réduction. A cet effet, ces derniers sont soumis à un circulation forcée à travers l'échangeur thermique et à travers la couche de charbon/minerai.
Mcfadden Fincham
Ottow Manfred
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