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The modeling of hematite reduction with hydrogen plus carbon monoxide mixtures: Part II. The direct reduction process in a shaft furnace arrangement
Author(s) -
Tsay Q. T.,
Ray W. H.,
Szekely Julian
Publication year - 1976
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690220618
Subject(s) - carbon monoxide , hydrogen , hematite , chemistry , reduction (mathematics) , inlet , process (computing) , gas composition , chemical looping combustion , chemical engineering , oxygen , thermodynamics , mineralogy , organic chemistry , catalysis , mechanical engineering , engineering , geometry , mathematics , physics , computer science , operating system
A mathematical model was developed for the direct reduction of hematite carried out in a countercurrent moving packed bed, and the process was simulated on a CDC 6400 computer. The response of the model to changes in the various process variables was investigated, and it was found that there is an optimum gas inlet composition (hydrogen‐carbon monoxide) for a given set of operating conditions. In addition, an optimum gas inlet temperature was revealed for cases where pure carbon monoxide was used as the reducing gas. The feasibility of side stream injection of reducing gas was studied. The calculations showed that there are certain ranges of operating conditions for which the injection of a hot side stream is advantageous. This study represents the first reported simulation of direct reduction process having carbon monoxide‐hydrogen gas mixtures as a reducing medium.