Thermal conductivity of porous refractory material after aging in service with carbon pick-up
Medium Density Insulating Boards, based on vermiculite, are used for the insulating lining of ladles in steel production. In service, carbon monoxide is generated from oxidation of neighbouring Magnesia – Carbon bricks and diffuses through the refractory brick lining to deposit carbon in the colder...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Open Ceramics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539522000773 |
| _version_ | 1811188184575377408 |
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| author | Diana Vitiello Benoit Nait-Ali Nicolas Tessier-Doyen Lionel Rebouillat David S. Smith |
| author_facet | Diana Vitiello Benoit Nait-Ali Nicolas Tessier-Doyen Lionel Rebouillat David S. Smith |
| author_sort | Diana Vitiello |
| collection | DOAJ |
| description | Medium Density Insulating Boards, based on vermiculite, are used for the insulating lining of ladles in steel production. In service, carbon monoxide is generated from oxidation of neighbouring Magnesia – Carbon bricks and diffuses through the refractory brick lining to deposit carbon in the colder insulating lining via the Boudouard reaction. Characterization by laser flash and hot disk measurements of original and post-mortem samples reveals an approximate increase by 26% in the overall thermal conductivity of the board to 0.34 W m−1 K−1 at room temperature following 15 months service. This is attributed to carbon and chloride phases detected by X-ray fluorescence and energy dispersive X-ray spectroscopy in the outermost zone of the board, cut into three zones for analysis along the heat flow direction. The increase in thermal conductivity is reduced to 17% when the thermal gradient in service conditions is considered. |
| first_indexed | 2024-04-11T14:15:15Z |
| format | Article |
| id | doaj.art-f8637f55c7fd436196bb1d6a3a6a010b |
| institution | Directory Open Access Journal |
| issn | 2666-5395 |
| language | English |
| last_indexed | 2024-04-11T14:15:15Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj.art-f8637f55c7fd436196bb1d6a3a6a010b2022-12-22T04:19:33ZengElsevierOpen Ceramics2666-53952022-09-0111100294Thermal conductivity of porous refractory material after aging in service with carbon pick-upDiana Vitiello0Benoit Nait-Ali1Nicolas Tessier-Doyen2Lionel Rebouillat3David S. Smith4University of Limoges, IRCER, 12 Rue Atlantis, F-87068, Limoges, France; Corresponding author.University of Limoges, IRCER, 12 Rue Atlantis, F-87068, Limoges, FranceUniversity of Limoges, IRCER, 12 Rue Atlantis, F-87068, Limoges, FrancePyrotek, 2400, Boulevard Lemire, Drummondville, Quebec, J2B 6X9, CanadaUniversity of Limoges, IRCER, 12 Rue Atlantis, F-87068, Limoges, FranceMedium Density Insulating Boards, based on vermiculite, are used for the insulating lining of ladles in steel production. In service, carbon monoxide is generated from oxidation of neighbouring Magnesia – Carbon bricks and diffuses through the refractory brick lining to deposit carbon in the colder insulating lining via the Boudouard reaction. Characterization by laser flash and hot disk measurements of original and post-mortem samples reveals an approximate increase by 26% in the overall thermal conductivity of the board to 0.34 W m−1 K−1 at room temperature following 15 months service. This is attributed to carbon and chloride phases detected by X-ray fluorescence and energy dispersive X-ray spectroscopy in the outermost zone of the board, cut into three zones for analysis along the heat flow direction. The increase in thermal conductivity is reduced to 17% when the thermal gradient in service conditions is considered.http://www.sciencedirect.com/science/article/pii/S2666539522000773Thermal propertiesAging phenomenaRefractory materials |
| spellingShingle | Diana Vitiello Benoit Nait-Ali Nicolas Tessier-Doyen Lionel Rebouillat David S. Smith Thermal conductivity of porous refractory material after aging in service with carbon pick-up Open Ceramics Thermal properties Aging phenomena Refractory materials |
| title | Thermal conductivity of porous refractory material after aging in service with carbon pick-up |
| title_full | Thermal conductivity of porous refractory material after aging in service with carbon pick-up |
| title_fullStr | Thermal conductivity of porous refractory material after aging in service with carbon pick-up |
| title_full_unstemmed | Thermal conductivity of porous refractory material after aging in service with carbon pick-up |
| title_short | Thermal conductivity of porous refractory material after aging in service with carbon pick-up |
| title_sort | thermal conductivity of porous refractory material after aging in service with carbon pick up |
| topic | Thermal properties Aging phenomena Refractory materials |
| url | http://www.sciencedirect.com/science/article/pii/S2666539522000773 |
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