Improvement of Blast Furnace Energy Efficiency by Injection of Preheated Pulverized Coal Fuel with Iron Oxides

Improvement of Blast Furnace Energy Efficiency by Injection of Preheated Pulverized Coal Fuel with Iron Oxides

This article discusses the improvement methods of blast furnace energy efficiency by combined injection of preheated pulverized coal fuel and iron oxides (concentrates of advanced beneficiation, flue dust, and others) into its tuyeres. The reasonability of the aforementioned measures is substantiate...

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Bibliographic Details
Published in:Steel in translation Vol. 51; no. 7; pp. 468 - 474
Main Authors: Moskalina, A. A., Chaika, A. L., Kornilov, B. V., Lebed’, V. V., Dzhigota, M. G.
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-07-2021
Springer Nature B.V
Subjects:
Blast furnace gas
Blast furnace practice
Chemistry and Materials Science
Coal
Energy efficiency
Exergy
Flue dust
Fuels
Iron oxides
Materials Science
Oxides
Pulverized coal
Pulverized fuels
Tuyeres
output
blast furnace
heat exchange
preheating of pulverized coal fuel
coke consumption
exergy
pulverized iron oxides
environmental performances
overall energy balance
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Summary:This article discusses the improvement methods of blast furnace energy efficiency by combined injection of preheated pulverized coal fuel and iron oxides (concentrates of advanced beneficiation, flue dust, and others) into its tuyeres. The reasonability of the aforementioned measures is substantiated. Based on the overall energy balance, their influence on heat energy parameters of blast furnace smelting has been established including its exergy, environmental, and technoeconomic performances. It has been determined that injection of preheated pulverized coal fuel into blast furnace well together with constant temperature of the tuyere area allows to increase the furnace output by at least 0.3% per each 100°C increase in the temperature of pulverized coal fuel, to decrease coke consumption by about 3%, and to increase exergy efficiency by up to 0.2%. Favorable influence of injection of pulverized iron oxides into blast furnace well of blast furnace on heat and gas dynamic operation of the furnace are demonstrated.
ISSN:0967-0912
1935-0988
DOI:10.3103/S0967091221070056