Effect of coal and coke qualities on blast furnace injection and productivity at Taranto

Book · Fri Dec 01 04:00:00 EST 1995

OSTI ID:129066

Salvatore, E; Calcagni, M ^[1]; Eichinger, F; Rafi, M

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1. ILVA, Taranto (Italy)

Injection rates at Taranto blast furnaces Nos. 2 and 4, for more than 16 months, was maintained above 175 kg/thm. Monthly average injection rate for two months stabilized above 190 kg/thm. This performance was possible due to the very high combined availabilities of Taranto blast furnaces and the KST injection system. Based upon this experience the quantitative relationships between coke/coal and blast furnace operational parameters were studied and are shown graphically. During this period due to coke quality changes, injection rate had to be reduced. The effect of using coke breeze in coke/ferrous charge as well as coal blend was also evaluated. Permeability of the furnace was found to be directly affected by O{sub 2} enrichment level, while at a high PCI rate no correlation between actual change in coke quality and permeability could be established. The future of PCI technology lies in better understanding of relationships between material specifications and blast furnace parameters of which permeability is of prime importance.

• OSTI ID: 129066
• Report Number(s): CONF-9504182--; ISBN 0-932897-99-1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ASH CONTENT
BITUMINOUS COAL
BLAST FURNACES
CARBON MONOXIDE
COKE
COMPRESSION STRENGTH
EXPERIMENTAL DATA
FUEL FEEDING SYSTEMS
FUEL SUBSTITUTION
HYDROGEN
MECHANICAL PROPERTIES
OXYGEN ENRICHMENT
PARAMETRIC ANALYSIS
PRODUCTIVITY
REDUCING AGENTS
TECHNOLOGY ASSESSMENT
VOLATILE MATTER