Concepts for the development of carbon-free mold powders for the continuous casting of steels.
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| Title: | Concepts for the development of carbon-free mold powders for the continuous casting of steels. |
|---|---|
| Authors: | Gruber, Nathalie1 (AUTHOR) nathalie.gruber@unileoben.ac.at, Harmuth, Harald1 (AUTHOR) |
| Source: | Metallurgical Research & Technology. 2026, Vol. 123 Issue 2, p1-9. 9p. |
| Subjects: | Continuous casting, Silicon carbide, Carbon steel, Carbon dioxide mitigation, Melting, Mineralogical chemistry |
| Abstract: | Mold powders for the continuous casting of ultra-low-carbon steels already contain low amounts of carbon. Furthermore, various approaches favor carbon burn-off at high temperatures to prevent the formation of a carbon-enriched layer on top of the liquid slag pool in the mold. Nevertheless, re-carburization of the steel still occurs. Therefore, the development of different mold powder compositions to reduce the free carbon content without negatively affecting melting behavior is required. An initial approach involved replacing carbon with SiC, which showed promising results. Subsequently, further laboratory investigations were conducted on different mold powder compositions with reduced SiC contents. However, to further decrease the total carbon content, a new concept is required: a mold powder consisting of basic and acidic granules, which are mixed after granulation. In the next step, melt-controlling additives are completely removed from the samples. For these mold powders, the influence of varying raw material components on melting behavior was additionally investigated. To verify this concept, the standard and newly developed mold powders were introduced into a furnace preheated to temperatures between 900−1200°C to simulate high heating rates. After a dwell time of 10 min followed by quenching to room temperature, the samples were investigated mineralogically. The results reveal that the diffusion path between raw material particles is increased due to the separation of the raw materials into two different granule types (basic and acidic). Furthermore, the formation of an intermediate liquid phase is shifted to higher temperatures. This shift results in a delay in the formation of new (intermediate) phases, such as the equilibrium liquid phase, fluorides, or cuspidine. The developed concept enables the complete removal of melt-controlling additives from the mold powder composition. As a side effect, the CO2 emissions from the mold powder is reduced. [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.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 192633482 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Concepts for the development of carbon-free mold powders for the continuous casting of steels. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Gruber%2C+Nathalie%22">Gruber, Nathalie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nathalie.gruber@unileoben.ac.at</i><br /><searchLink fieldCode="AR" term="%22Harmuth%2C+Harald%22">Harmuth, Harald</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, p1-9. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Continuous+casting%22">Continuous casting</searchLink><br /><searchLink fieldCode="DE" term="%22Silicon+carbide%22">Silicon carbide</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+steel%22">Carbon steel</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+dioxide+mitigation%22">Carbon dioxide mitigation</searchLink><br /><searchLink fieldCode="DE" term="%22Melting%22">Melting</searchLink><br /><searchLink fieldCode="DE" term="%22Mineralogical+chemistry%22">Mineralogical chemistry</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Mold powders for the continuous casting of ultra-low-carbon steels already contain low amounts of carbon. Furthermore, various approaches favor carbon burn-off at high temperatures to prevent the formation of a carbon-enriched layer on top of the liquid slag pool in the mold. Nevertheless, re-carburization of the steel still occurs. Therefore, the development of different mold powder compositions to reduce the free carbon content without negatively affecting melting behavior is required. An initial approach involved replacing carbon with SiC, which showed promising results. Subsequently, further laboratory investigations were conducted on different mold powder compositions with reduced SiC contents. However, to further decrease the total carbon content, a new concept is required: a mold powder consisting of basic and acidic granules, which are mixed after granulation. In the next step, melt-controlling additives are completely removed from the samples. For these mold powders, the influence of varying raw material components on melting behavior was additionally investigated. To verify this concept, the standard and newly developed mold powders were introduced into a furnace preheated to temperatures between 900−1200°C to simulate high heating rates. After a dwell time of 10 min followed by quenching to room temperature, the samples were investigated mineralogically. The results reveal that the diffusion path between raw material particles is increased due to the separation of the raw materials into two different granule types (basic and acidic). Furthermore, the formation of an intermediate liquid phase is shifted to higher temperatures. This shift results in a delay in the formation of new (intermediate) phases, such as the equilibrium liquid phase, fluorides, or cuspidine. The developed concept enables the complete removal of melt-controlling additives from the mold powder composition. As a side effect, the CO2 emissions from the mold powder is reduced. [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.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1051/metal/2025152 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 1 Subjects: – SubjectFull: Continuous casting Type: general – SubjectFull: Silicon carbide Type: general – SubjectFull: Carbon steel Type: general – SubjectFull: Carbon dioxide mitigation Type: general – SubjectFull: Melting Type: general – SubjectFull: Mineralogical chemistry Type: general Titles: – TitleFull: Concepts for the development of carbon-free mold powders for the continuous casting of steels. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Gruber, Nathalie – PersonEntity: Name: NameFull: Harmuth, Harald 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 |
