Studies on the use of two different magnesia-carbon recyclates as secondary raw material for MgO–C refractories
Two magnesia-carbon (MgO–C) recyclates were investigated with respect to their utilization as raw materials for MgO–C refractories. X-ray diffraction and backscattered electron diffraction were used for phase analysis of the recyclate aggregates. In addition, the gas released from one of the recycla...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Open Ceramics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539523000986 |
| _version_ | 1827859507124895744 |
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| author | Kirsten Moritz Nora Brachhold Felix Küster Steffen Dudczig Thomas Schemmel Christos G. Aneziris |
| author_facet | Kirsten Moritz Nora Brachhold Felix Küster Steffen Dudczig Thomas Schemmel Christos G. Aneziris |
| author_sort | Kirsten Moritz |
| collection | DOAJ |
| description | Two magnesia-carbon (MgO–C) recyclates were investigated with respect to their utilization as raw materials for MgO–C refractories. X-ray diffraction and backscattered electron diffraction were used for phase analysis of the recyclate aggregates. In addition, the gas released from one of the recyclates when it came into contact with water was analyzed in a mass spectrometer. MgO–C samples with different recyclate contents were produced. During coking, the samples showed different behavior depending on the recyclate used. Whereas those containing the first recyclate showed a slight shrinkage, a significant increase in volume was observed in the case of the specimens that contained the second recyclate. The volume increase could be reduced by thermal pretreatment of this recyclate at 380 °C. As a result, better bulk density and porosity values were obtained. However, an even stronger positive effect was achieved by replacing the pitch-based binder used in the binder system with a novolak-based. |
| first_indexed | 2024-03-12T13:10:20Z |
| format | Article |
| id | doaj.art-798fd4cf67c1420f8af0bd72f5ee4813 |
| institution | Directory Open Access Journal |
| issn | 2666-5395 |
| language | English |
| last_indexed | 2024-03-12T13:10:20Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj.art-798fd4cf67c1420f8af0bd72f5ee48132023-08-28T04:23:24ZengElsevierOpen Ceramics2666-53952023-09-0115100426Studies on the use of two different magnesia-carbon recyclates as secondary raw material for MgO–C refractoriesKirsten Moritz0Nora Brachhold1Felix Küster2Steffen Dudczig3Thomas Schemmel4Christos G. Aneziris5Technische Universität Bergakademie Freiberg, Institute of Ceramics, Refractories and Composite Materials, Agricolastr. 17, 09599, Freiberg, Germany; Corresponding author.Technische Universität Bergakademie Freiberg, Institute of Ceramics, Refractories and Composite Materials, Agricolastr. 17, 09599, Freiberg, GermanyTechnische Universität Bergakademie Freiberg, Institute of Energy Process Engineering and Chemical Engineering, Fuchsmühlenweg 9D, 09599, Freiberg, GermanyTechnische Universität Bergakademie Freiberg, Institute of Ceramics, Refractories and Composite Materials, Agricolastr. 17, 09599, Freiberg, GermanyRefratechnik Steel GmbH, Am Seestern 5, 40547, Düsseldorf, GermanyTechnische Universität Bergakademie Freiberg, Institute of Ceramics, Refractories and Composite Materials, Agricolastr. 17, 09599, Freiberg, GermanyTwo magnesia-carbon (MgO–C) recyclates were investigated with respect to their utilization as raw materials for MgO–C refractories. X-ray diffraction and backscattered electron diffraction were used for phase analysis of the recyclate aggregates. In addition, the gas released from one of the recyclates when it came into contact with water was analyzed in a mass spectrometer. MgO–C samples with different recyclate contents were produced. During coking, the samples showed different behavior depending on the recyclate used. Whereas those containing the first recyclate showed a slight shrinkage, a significant increase in volume was observed in the case of the specimens that contained the second recyclate. The volume increase could be reduced by thermal pretreatment of this recyclate at 380 °C. As a result, better bulk density and porosity values were obtained. However, an even stronger positive effect was achieved by replacing the pitch-based binder used in the binder system with a novolak-based.http://www.sciencedirect.com/science/article/pii/S2666539523000986Magnesia-carbon refractoriesRecyclingElectron backscatter diffraction |
| spellingShingle | Kirsten Moritz Nora Brachhold Felix Küster Steffen Dudczig Thomas Schemmel Christos G. Aneziris Studies on the use of two different magnesia-carbon recyclates as secondary raw material for MgO–C refractories Open Ceramics Magnesia-carbon refractories Recycling Electron backscatter diffraction |
| title | Studies on the use of two different magnesia-carbon recyclates as secondary raw material for MgO–C refractories |
| title_full | Studies on the use of two different magnesia-carbon recyclates as secondary raw material for MgO–C refractories |
| title_fullStr | Studies on the use of two different magnesia-carbon recyclates as secondary raw material for MgO–C refractories |
| title_full_unstemmed | Studies on the use of two different magnesia-carbon recyclates as secondary raw material for MgO–C refractories |
| title_short | Studies on the use of two different magnesia-carbon recyclates as secondary raw material for MgO–C refractories |
| title_sort | studies on the use of two different magnesia carbon recyclates as secondary raw material for mgo c refractories |
| topic | Magnesia-carbon refractories Recycling Electron backscatter diffraction |
| url | http://www.sciencedirect.com/science/article/pii/S2666539523000986 |
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