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Metallurgist
Published in: Metallurgist 9-10/2022

01-02-2022

Reducing the Cost of Steel Desulfurization during Secondary Refining in a Ladle-Furnace Unit

Authors: A. Ya. Babanin, B. F. Belov, A. Ya. Mints, I. A. Abakumov, D. V. Pervukhin

Published in: Metallurgist | Issue 9-10/2022

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Abstract

Based on the conducted studies, the authors have determined the changes in the structural and chemical conditions of calcium silicates that are present in slag during steel smelting in a 120-ton electric arc furnace of the Danark system and its secondary refining in a steel-pouring ladle of the ladle-furnace unit. The following chain of calcium silicate transformations has been established:
$$ \mathrm{CaO}\cdotp Si{O}_2\to 2\kern0.1em CaO\cdotp Si{O}_2\to 3\kern0.1em CaO\cdotp Si{O}_2\to 4\kern0.1em CaO\cdotp Si{O}_2. $$
A method based on the theory of MHS-phases (model of harmonic structures) was used to determine the structural conditions of calcium silicates and present them in the form of structural-ionic-molecular (SIM) complexes. It was found that 4 CaO ⋅ SiO2 (eutectic) and 3 CaO ⋅ SiO2 compounds have the highest and the second highest desulfurizing abilities, respectively. The obtained results enable control of the slag activation process to significantly increase its refining capacity, as well as predict and optimize the technological parameters of steel desulfurization without the use of expensive and scarce materials.
previous article Role of the Silicon Carbide Content in the Certain Workspace Zones of Furnaces Used for Smelting Silicon and High-Silicon Ferroalloys
next article Effect of Nanosized Phase Precipitates on the Corrosion Resistance of Cold-Rolled High-Strength Low-Carbon Niobium Microalloyed Steels

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Metadata
Title
Reducing the Cost of Steel Desulfurization during Secondary Refining in a Ladle-Furnace Unit
Authors
A. Ya. Babanin
B. F. Belov
A. Ya. Mints
I. A. Abakumov
D. V. Pervukhin
Publication date
01-02-2022
Publisher
Springer US
Published in
Metallurgist / Issue 9-10/2022
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-022-01236-y

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