Rapid in-flight'' reduction of fine iron ore injected into a blast furnace

Conference · Fri Jan 01 04:00:00 EST 1993 · Proceedings, Ironmaking Conference; (United States)

OSTI ID:6133222

Nozawa, K; Shibata, K; Sasahara, S; Shimizu, M ^[1]

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1. 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--
• Conference Information: Journal Name: Proceedings, Ironmaking Conference; (United States) Journal Volume: 52
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500* -- Coal
Lignite
& Peat-- Products & By-Products
ASH CONTENT
BLAST FURNACES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COKE
ENERGY SOURCES
FOSSIL FUELS
FUELS
FURNACES
IRON ORES
MATERIALS
MATTER
MOISTURE
MORPHOLOGY
ORES
PARTICLE SIZE
PRODUCTIVITY
REDUCING AGENTS
REDUCTION
SIZE
SMELTING
VOLATILE MATTER