Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1987-07-31
1989-02-21
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
C21B 1314
Patent
active
048061581
ABSTRACT:
Disclosed is a process for the production of reduced iron oxide-containing materials. Iron oxide and solid carbonaceous reducing agent are charged into a first expanded fluidized bed, which is supplied with an oxygen-containing fluidizing gas. The gas residence time selected is controlled in the reactor containing the first fluidized bed so that the reduction potential will result in a reduction of the iron oxide material not in excess of the FeO stage. A gas-solids suspension discharged from the first fluidized bed is supplied to a second expanded fluidized bed, which is supplied with a strongly reducing fluidizing gas. Strongly reducing gas and a major portion of the resulting devolatilized carbonaceous material are discharged from the upper portion of the second fluidized bed. Reduced material having a metallization of 50 to 80% and the remaining devolatilized carbonaceous material are discharged from the lower portion of the second fluidized bed.
REFERENCES:
patent: 2742354 (1956-04-01), Ogorzaly et al.
patent: 4578110 (1986-03-01), Price-Falcon et al.
patent: 4678508 (1987-07-01), Saeki et al.
Hirsch Martin
Rose Fritz
Serbent Harry
Andrews Melvyn J.
Metallgesellschaft Aktiengesellschaft
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