Rapid in-flight'' reduction of fine iron ore injected into a blast furnace
- Kobe Stell Ltd., Hatano (Japan)
The current need for cost cutting and more efficient use of resources makes it desirable to attain a higher rate of ore injection from the blast furnace tuyeres. One area to be researched is the microscopic reduction behavior of fine iron ore in hot reducing gas flow, to ascertain the optimum conditions for smelting reduction. Microanalysis of injected ore revealed the complete spheroidization of the reduced ore particles. In addition, a peculiar morphology resulted: iron produced on the surface of the melted wustite droplets was immediately engulfed by liquid wustite. This morphology suggests the importance of frequent contact between the ore particles and the reducing agents. Of the possible reducing agents, carbon coating seems the most desirable for promoting the in-flight smelting reduction.
- OSTI ID:
- 6133222
- Report Number(s):
- CONF-9303222-; CODEN: PIRCB9
- Journal Information:
- Proceedings, Ironmaking Conference; (United States), Vol. 52; Conference: 52. ironmaking conference, Dallas, TX (United States), 28-31 Mar 1993; ISSN 0099-6874
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
IRON ORES
REDUCTION
ASH CONTENT
BLAST FURNACES
COAL
COKE
MOISTURE
MORPHOLOGY
PARTICLE SIZE
PRODUCTIVITY
REDUCING AGENTS
SMELTING
VOLATILE MATTER
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
FURNACES
MATERIALS
MATTER
ORES
SIZE
010500* - Coal
Lignite
& Peat- Products & By-Products