Title

IMPROVED BLAST FURNACE STOVE OPERATION WITH THE USE OF OXYGEN ENRICHED COMBUSTION AIR

IMPROVED BLAST FURNACE STOVE OPERATION WITH THE USE OF OXYGEN ENRICHED COMBUSTION AIR

Authorship

Martin, Peter M.; Geach, Mark; Michelsson, Kim; Niemi., Tommi

Martin, Peter M.

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Geach, Mark

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Michelsson, Kim

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Niemi., Tommi

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DOI

10.5151/2594-357X-22168

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Abstract

The operation of the Blast Furnace as a means of primary iron production continues to develop in response to the requirements of reducing overall cost and coke consumption. The B.F. operation has changed with the demand for higher blast temperatures from the Stoves plant; the increased duty for the Stoves plant has resulted in the heating cycle fuel gas being supplemented with a high calorific value gas increasing the operating cost. The phenomenon of increasing the oxygen content of ambient air to achieve an increase in the temperature of combusted fuel gasses is understood and practiced in other applications. The technology is beginning to be applied to the combustion process in the stoves heating cycle so as to provide a number of benefits: reduce or eliminate enrichment fuel gas; reduce the flue (waste) gas flow; maintain or increase the hot blast temperature. The paper will explore the implementation of this technology on an operating furnace incorporating three internal stoves, with the resultant changes in blast conditions and fuel gas consumption. A brief review of future developments in the field is incorporated.

The operation of the Blast Furnace as a means of primary iron production continues to develop in response to the requirements of reducing overall cost and coke consumption. The B.F. operation has changed with the demand for higher blast temperatures from the Stoves plant; the increased duty for the Stoves plant has resulted in the heating cycle fuel gas being supplemented with a high calorific value gas increasing the operating cost. The phenomenon of increasing the oxygen content of ambient air to achieve an increase in the temperature of combusted fuel gasses is understood and practiced in other applications. The technology is beginning to be applied to the combustion process in the stoves heating cycle so as to provide a number of benefits: reduce or eliminate enrichment fuel gas; reduce the flue (waste) gas flow; maintain or increase the hot blast temperature. The paper will explore the implementation of this technology on an operating furnace incorporating three internal stoves, with the resultant changes in blast conditions and fuel gas consumption. A brief review of future developments in the field is incorporated.

Keywords

Stoves; Oxygen enrichment; Fuel combustion; Flame temperature.

Stoves; Oxygen enrichment; Fuel combustion; Flame temperature.