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Metallurgist
Published in: Metallurgist 9-10/2019

01-02-2019

Effect of Coal-Dust Fuel and Compensating Measures on Blast Furnace Charge Softening Zone Gas Permeability

Author: A. V. Kuzin

Published in: Metallurgist | Issue 9-10/2019

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Abstract

The effect of coal-dust fuel and the main compensating measures on the change in gas pressure drop in a blast furnace charge softening zone (Δpsz ) is estimated by calculation. The change in gas permeability in the charge softening zone is evaluated using a mathematical model based on contemporary concepts of the softening zone structure.
Calculations show that an increase in coal-dust fuel consumption from 100 to 160 kg/ton of pig iron is accompanied by an increase in Δpsz . In order to reduce the Δpsz with injection of this fuel, compensating measures are used in the mathematical model. An increase in iron content in the charge from 56 to 60% provides a reduction in the Δpsz by 1.1–1.5%. An increase in coke strength from 40 to 50% makes it possible to reduce Δpsz by 20–25%. Use of iron-ore materials with a lower softening temperature range makes it possible to reduce Δpsz by 25%. In addition, formation of developed axial gas flow makes it possible to reduce Δpsz by a factor of 2.6.
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Metadata
Title
Effect of Coal-Dust Fuel and Compensating Measures on Blast Furnace Charge Softening Zone Gas Permeability
Author
A. V. Kuzin
Publication date
01-02-2019
Publisher
Springer US
Published in
Metallurgist / Issue 9-10/2019
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-019-00745-7

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