Pulverized coal injection (PCI) at Inland`s No. 7 blast furnace

Book · Fri Dec 01 04:00:00 EST 1995

OSTI ID:129065

Carter, W L; Greenawald, P B; Ranade, M G; Ricketts, J A; Zuke, D A ^[1]

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1. Inland Steel Co., East Chicago, IN (United States)

Fuel injection at the tuyeres has always been part of normal operating practice on this blast furnace. It has been used as much because of the beneficial effects on furnace operation as for the replacement of some of the coke that would otherwise be consumed. Fuel oil was used at first, but since the early 1980s it was more economical to inject natural gas. Studies in 1990 indicated that natural gas could be increased to 75 kg/tHM on No. 7 Furnace, and this would result in a coke rate of approximately 360 kg/tHM. It was apparent that coal injection offered significantly more opportunity for coke savings. Coke rate could be lowered to 300 kg/tHM with coal injected at 175 kg/tHM. Some combustion limitations were expected at that level. A coke rate of 270 kg/tHM with coal at 200 kg/tHM may be possible once these limitations are overcome. Furnace permeability was expected to limit the ability to reduce coke rate any further. In addition, the relative cost of coal would be significantly lower than the cost of coke it replaced. This lead to the decision late in 1991 to install pulverized coal injection (PCI) equipment for all of Inland`s blast furnaces. This paper will deal with PCI experience at No. 7 Blast Furnace.

• OSTI ID: 129065
• 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
COAL PREPARATION
COKE
COMPARATIVE EVALUATIONS
CONSUMPTION RATES
EXPERIMENTAL DATA
FUEL FEEDING SYSTEMS
FUEL SUBSTITUTION
MOISTURE
NATURAL GAS
OPERATION
OPTIMIZATION
PARTICLE SIZE
PERFORMANCE
PULVERIZED FUELS