Influence of the mineral gangue on pellets softening melting properties in blast furnace. Experimental study of phase equilibria during the melting of pre-reduced pellets.
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| Title: | Influence of the mineral gangue on pellets softening melting properties in blast furnace. Experimental study of phase equilibria during the melting of pre-reduced pellets. |
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| Authors: | Graz, Yann1 (AUTHOR) yann.graz@arcelormittal.com, Athoy, Evangeline1 (AUTHOR), Oudich, Fayssal1 (AUTHOR), Maurice, Yann1 (AUTHOR), Husson, Aurore1 (AUTHOR), Berthelemy, Nadine1 (AUTHOR), Jactard, Jeremy1 (AUTHOR), Basselin, Yves1 (AUTHOR), Siboni, Geraldine1 (AUTHOR) |
| Source: | Metallurgical Research & Technology. 2026, Vol. 123 Issue 2, p1-7. 7p. |
| Subjects: | Blast furnaces, Phase equilibrium, Pelletizing, Thermodynamics, Thermal properties |
| Abstract: | The progressive decarbonization of the steel industry is being undertaken through the transformation of blast furnace operations, notably through the reduction of coke consumption. Lower coke rates may affect gas permeability in the cohesive zone, a viscous and impermeable layer formed by the softening and melting of iron-bearing materials. Controlling the cohesive zone, its shape, thickness, and permeability, is essential for efficient blast furnace performance. The choice of adapted raw materials, i.e. their softening and melting properties, is a straightforward way to control the cohesive zone and to increase permeability. This study investigates the melting behavior of iron ore pellets with varying chemical compositions (acidic vs. fluxed) under conditions representative of the cohesive zone. Pellets were pre-reduced using the BORIS® counter-current pilot up to 1000 °C under representative conditions of the blast furnace. Reduced pellets were then subjected to melting tests via differential thermal analysis (DTA) and quenching furnace experiments. These analyses make it possible to better understand the softening and melting behavior of pellets in a blast furnace and results show that basic pellets generate less liquid phase at high temperatures, improving mechanical properties and improved reductive gas distribution. This result also implies a deeper and thinner cohesive zone inside the blast furnace. Attention was paid to the microstructure of the iron ores as the deformation of reduced materials is triggered by the partial melting of pellets and the formation of primary slag. Results also indicate that thermodynamic modelling could be a suitable and rapid tool to anticipate the behavior of different pellets at the cohesive zone level of blast furnaces, though existing databases must be refined to better reflect real phase equilibria in commercial iron ores. [ABSTRACT FROM AUTHOR] |
| Copyright of Metallurgical Research & Technology is the property of EDP Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 192633483 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Influence of the mineral gangue on pellets softening melting properties in blast furnace. Experimental study of phase equilibria during the melting of pre-reduced pellets. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Graz%2C+Yann%22">Graz, Yann</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yann.graz@arcelormittal.com</i><br /><searchLink fieldCode="AR" term="%22Athoy%2C+Evangeline%22">Athoy, Evangeline</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Oudich%2C+Fayssal%22">Oudich, Fayssal</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Maurice%2C+Yann%22">Maurice, Yann</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Husson%2C+Aurore%22">Husson, Aurore</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Berthelemy%2C+Nadine%22">Berthelemy, Nadine</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jactard%2C+Jeremy%22">Jactard, Jeremy</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Basselin%2C+Yves%22">Basselin, Yves</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Siboni%2C+Geraldine%22">Siboni, Geraldine</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Metallurgical+Research+%26+Technology%22">Metallurgical Research & Technology</searchLink>. 2026, Vol. 123 Issue 2, p1-7. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Blast+furnaces%22">Blast furnaces</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+equilibrium%22">Phase equilibrium</searchLink><br /><searchLink fieldCode="DE" term="%22Pelletizing%22">Pelletizing</searchLink><br /><searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+properties%22">Thermal properties</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The progressive decarbonization of the steel industry is being undertaken through the transformation of blast furnace operations, notably through the reduction of coke consumption. Lower coke rates may affect gas permeability in the cohesive zone, a viscous and impermeable layer formed by the softening and melting of iron-bearing materials. Controlling the cohesive zone, its shape, thickness, and permeability, is essential for efficient blast furnace performance. The choice of adapted raw materials, i.e. their softening and melting properties, is a straightforward way to control the cohesive zone and to increase permeability. This study investigates the melting behavior of iron ore pellets with varying chemical compositions (acidic vs. fluxed) under conditions representative of the cohesive zone. Pellets were pre-reduced using the BORIS® counter-current pilot up to 1000 °C under representative conditions of the blast furnace. Reduced pellets were then subjected to melting tests via differential thermal analysis (DTA) and quenching furnace experiments. These analyses make it possible to better understand the softening and melting behavior of pellets in a blast furnace and results show that basic pellets generate less liquid phase at high temperatures, improving mechanical properties and improved reductive gas distribution. This result also implies a deeper and thinner cohesive zone inside the blast furnace. Attention was paid to the microstructure of the iron ores as the deformation of reduced materials is triggered by the partial melting of pellets and the formation of primary slag. Results also indicate that thermodynamic modelling could be a suitable and rapid tool to anticipate the behavior of different pellets at the cohesive zone level of blast furnaces, though existing databases must be refined to better reflect real phase equilibria in commercial iron ores. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Metallurgical Research & Technology is the property of EDP Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=192633483 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1051/metal/2026008 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 1 Subjects: – SubjectFull: Blast furnaces Type: general – SubjectFull: Phase equilibrium Type: general – SubjectFull: Pelletizing Type: general – SubjectFull: Thermodynamics Type: general – SubjectFull: Thermal properties Type: general Titles: – TitleFull: Influence of the mineral gangue on pellets softening melting properties in blast furnace. Experimental study of phase equilibria during the melting of pre-reduced pellets. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Graz, Yann – PersonEntity: Name: NameFull: Athoy, Evangeline – PersonEntity: Name: NameFull: Oudich, Fayssal – PersonEntity: Name: NameFull: Maurice, Yann – PersonEntity: Name: NameFull: Husson, Aurore – PersonEntity: Name: NameFull: Berthelemy, Nadine – PersonEntity: Name: NameFull: Jactard, Jeremy – PersonEntity: Name: NameFull: Basselin, Yves – PersonEntity: Name: NameFull: Siboni, Geraldine IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: 2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 22713646 Numbering: – Type: volume Value: 123 – Type: issue Value: 2 Titles: – TitleFull: Metallurgical Research & Technology Type: main |
| ResultId | 1 |
