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Effect of Steelmaking Slag Additives on Mullitization and Phase Composition of Chamotte Refractories.

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Title: Effect of Steelmaking Slag Additives on Mullitization and Phase Composition of Chamotte Refractories.
Authors: Arinova, Saniya1 (AUTHOR), Kvon, Svetlana1 (AUTHOR) s.kvon@ktu.edu.kz, Kulikov, Vitaliy1 (AUTHOR), Altynova, Assem1 (AUTHOR), Zharylkassin, Nurdaulet1 (AUTHOR)
Source: Materials (1996-1944). Jun2026, Vol. 19 Issue 12, p2438. 20p.
Subjects: Slag, Refractory materials, Sintering, Thermal stability, Microstructure
Abstract: Steelmaking produces large volumes of slag, a by-product with environmental risks due to accumulation and possible contamination. This study explores its use as a mineralizing agent in chamotte refractories. Slag rich in clinoferrisilite was added up to 5 wt.% to partially replace fine chamotte. Samples were shaped by semi-dry pressing and fired at 1350 °C. Chemical and phase composition, thermal behavior, microstructure, and physico-mechanical properties were analyzed. Results showed slag addition increased mullite content to 68 wt.% and promoted secondary magnesium–aluminosilicate phases (indialite, cordierite), indicating activation of reactions in the MgO-Al2O3-SiO2 system. DSC and TGA revealed thermal effects between 1298 and 1325 °C, confirming slag's fluxing role and lowering the liquid-phase sintering temperature. Optimal properties were achieved with 5% slag and 10% clay, yielding compressive strength of 24 MPa and apparent density of 2.30 g/cm3, meeting GOST 390-96 requirements for grade SHA. However, excess liquid-phase components reduce thermal stability. Thus, steelmaking slag is an effective secondary raw material, enhancing mullitization and refractory performance when used within controlled limits. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI 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: 194907512
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PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Effect of Steelmaking Slag Additives on Mullitization and Phase Composition of Chamotte Refractories.
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  Data: <searchLink fieldCode="AR" term="%22Arinova%2C+Saniya%22">Arinova, Saniya</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kvon%2C+Svetlana%22">Kvon, Svetlana</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> s.kvon@ktu.edu.kz</i><br /><searchLink fieldCode="AR" term="%22Kulikov%2C+Vitaliy%22">Kulikov, Vitaliy</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Altynova%2C+Assem%22">Altynova, Assem</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zharylkassin%2C+Nurdaulet%22">Zharylkassin, Nurdaulet</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jun2026, Vol. 19 Issue 12, p2438. 20p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Slag%22">Slag</searchLink><br /><searchLink fieldCode="DE" term="%22Refractory+materials%22">Refractory materials</searchLink><br /><searchLink fieldCode="DE" term="%22Sintering%22">Sintering</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Steelmaking produces large volumes of slag, a by-product with environmental risks due to accumulation and possible contamination. This study explores its use as a mineralizing agent in chamotte refractories. Slag rich in clinoferrisilite was added up to 5 wt.% to partially replace fine chamotte. Samples were shaped by semi-dry pressing and fired at 1350 °C. Chemical and phase composition, thermal behavior, microstructure, and physico-mechanical properties were analyzed. Results showed slag addition increased mullite content to 68 wt.% and promoted secondary magnesium–aluminosilicate phases (indialite, cordierite), indicating activation of reactions in the MgO-Al2O3-SiO2 system. DSC and TGA revealed thermal effects between 1298 and 1325 °C, confirming slag's fluxing role and lowering the liquid-phase sintering temperature. Optimal properties were achieved with 5% slag and 10% clay, yielding compressive strength of 24 MPa and apparent density of 2.30 g/cm3, meeting GOST 390-96 requirements for grade SHA. However, excess liquid-phase components reduce thermal stability. Thus, steelmaking slag is an effective secondary raw material, enhancing mullitization and refractory performance when used within controlled limits. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI 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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        Value: 10.3390/ma19122438
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Refractory materials
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      – SubjectFull: Sintering
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      – SubjectFull: Thermal stability
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      – SubjectFull: Microstructure
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            NameFull: Kulikov, Vitaliy
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            NameFull: Altynova, Assem
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            – D: 15
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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