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In-Situ measurement of gas emission by pyrolysis of various ceramic materials used for submerged-entry nozzle refractory.

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Title: In-Situ measurement of gas emission by pyrolysis of various ceramic materials used for submerged-entry nozzle refractory.
Authors: Lee, Dong-Jun1 (AUTHOR), Cho, Yong-Min1 (AUTHOR), Kim, Jun Hyun2 (AUTHOR), Choi, Sangbae2 (AUTHOR), Jung, Sung-Mo1 (AUTHOR), Kang, Youn-Bae1,3 (AUTHOR) ybkang@postech.ac.kr
Source: Ceramics International. Oct2023, Vol. 49 Issue 19, p32024-32034. 11p.
Subjects: Continuous casting, Nozzles, Refractory materials, Heat treatment, Mass spectrometers, Ceramic materials
Abstract: High-temperature heat treatment was performed on Submerged-Entry Nozzle (SEN) refractory materials, coupled with in-situ gas analysis, to identify the emitted gas species. Various SEN refractories, including "oxide-based" ones containing SiO 2 (s) and C(s), exhibited a carbothermic reaction: SiO 2 (s) + 3C(s) = SiC(s) + 2CO(g). The emission of CO(g) was confirmed for the first time using a quadrupole mass spectrometer, while the emission of SiO(g) was not observed. An "oxide-less" refractory composed of AlON–AlN–BN emitted only N 2 (g). Considering the reactivity of CO(g) in the reoxidation of molten steel passing through the SEN, it is crucial to minimize CO(g) emissions during continuous casting. The extent of CO(g) emission was discussed with respect to the compositions of the refractories. This study elucidates the gas emission mechanism of SEN refractories, which is the main cause of initial clog deposit growth. The effectiveness of the oxide-less refractory in suppressing CO(g) emission was demonstrated. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. 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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DbLabel: Engineering Source
An: 169876043
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: In-Situ measurement of gas emission by pyrolysis of various ceramic materials used for submerged-entry nozzle refractory.
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  Data: <searchLink fieldCode="AR" term="%22Lee%2C+Dong-Jun%22">Lee, Dong-Jun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cho%2C+Yong-Min%22">Cho, Yong-Min</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Jun+Hyun%22">Kim, Jun Hyun</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Choi%2C+Sangbae%22">Choi, Sangbae</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jung%2C+Sung-Mo%22">Jung, Sung-Mo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kang%2C+Youn-Bae%22">Kang, Youn-Bae</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> ybkang@postech.ac.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Oct2023, Vol. 49 Issue 19, p32024-32034. 11p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Continuous+casting%22">Continuous casting</searchLink><br /><searchLink fieldCode="DE" term="%22Nozzles%22">Nozzles</searchLink><br /><searchLink fieldCode="DE" term="%22Refractory+materials%22">Refractory materials</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+treatment%22">Heat treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+spectrometers%22">Mass spectrometers</searchLink><br /><searchLink fieldCode="DE" term="%22Ceramic+materials%22">Ceramic materials</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: High-temperature heat treatment was performed on Submerged-Entry Nozzle (SEN) refractory materials, coupled with in-situ gas analysis, to identify the emitted gas species. Various SEN refractories, including "oxide-based" ones containing SiO 2 (s) and C(s), exhibited a carbothermic reaction: SiO 2 (s) + 3C(s) = SiC(s) + 2CO(g). The emission of CO(g) was confirmed for the first time using a quadrupole mass spectrometer, while the emission of SiO(g) was not observed. An "oxide-less" refractory composed of AlON–AlN–BN emitted only N 2 (g). Considering the reactivity of CO(g) in the reoxidation of molten steel passing through the SEN, it is crucial to minimize CO(g) emissions during continuous casting. The extent of CO(g) emission was discussed with respect to the compositions of the refractories. This study elucidates the gas emission mechanism of SEN refractories, which is the main cause of initial clog deposit growth. The effectiveness of the oxide-less refractory in suppressing CO(g) emission was demonstrated. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. 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:
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      – Type: doi
        Value: 10.1016/j.ceramint.2023.07.168
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: 32024
    Subjects:
      – SubjectFull: Continuous casting
        Type: general
      – SubjectFull: Nozzles
        Type: general
      – SubjectFull: Refractory materials
        Type: general
      – SubjectFull: Heat treatment
        Type: general
      – SubjectFull: Mass spectrometers
        Type: general
      – SubjectFull: Ceramic materials
        Type: general
    Titles:
      – TitleFull: In-Situ measurement of gas emission by pyrolysis of various ceramic materials used for submerged-entry nozzle refractory.
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            NameFull: Lee, Dong-Jun
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            NameFull: Cho, Yong-Min
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            NameFull: Kim, Jun Hyun
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            NameFull: Choi, Sangbae
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            NameFull: Jung, Sung-Mo
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              M: 10
              Text: Oct2023
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              Y: 2023
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              Value: 49
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