Desulfurization behavior of Si-killed 316L stainless steel melt by CaO-SiO2-CaF2-Al2O3-MgO slag
The desulfurization behavior of 316L stainless steel (STS316L) melt with the CaO-SiO2-CaF2-Al2O3-MgO slag was investigated with different CaO/SiO2 (=C/S) ratio and CaF2 content at 1873 K. As the C/S ratio increased, the sulfide capacity increased, whereas the sulfide capacity of the high C/S (=1.7)...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422003556 |
| _version_ | 1828289465235275776 |
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| author | Tae Su Jeong Jin Hyung Cho Jung Ho Heo Joo Hyun Park |
| author_facet | Tae Su Jeong Jin Hyung Cho Jung Ho Heo Joo Hyun Park |
| author_sort | Tae Su Jeong |
| collection | DOAJ |
| description | The desulfurization behavior of 316L stainless steel (STS316L) melt with the CaO-SiO2-CaF2-Al2O3-MgO slag was investigated with different CaO/SiO2 (=C/S) ratio and CaF2 content at 1873 K. As the C/S ratio increased, the sulfide capacity increased, whereas the sulfide capacity of the high C/S (=1.7) slag was not affected by CaF2 content. The overall mass transfer coefficient (kO) increased with C/S ratio, but was constant above a critical C/S value, and it was also constant across varied CaF2 content at relatively high C/S (=1.7) condition. Since the metal condition of the present study was constant, the change in kO was caused by slag phase mass transfer coefficient (ks) and sulfur distribution ratio (LS), which were affected by the physicochemical properties of the slag. Since desulfurization reaction requires consideration of both kinetic and thermodynamic factors, the ‘logCS2−−logη’ (where CS2− is sulfide capacity and η is viscosity), was proposed as a meaningful physicochemical parameter. If the slag basicity is relatively high, at which the kO is equivalent regardless of slag compositions, the desulfurization reaction is controlled by metal phase mass transfer. However, if the slag basicity becomes lower, at which the kO significantly decreases, the desulfurization reaction is assumed to be controlled by slag phase mass transfer and/or mixed controlled process. |
| first_indexed | 2024-04-13T10:21:31Z |
| format | Article |
| id | doaj.art-271f1c10a39a4d1b94414ae007ba894d |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-13T10:21:31Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-271f1c10a39a4d1b94414ae007ba894d2022-12-22T02:50:29ZengElsevierJournal of Materials Research and Technology2238-78542022-05-011822502260Desulfurization behavior of Si-killed 316L stainless steel melt by CaO-SiO2-CaF2-Al2O3-MgO slagTae Su Jeong0Jin Hyung Cho1Jung Ho Heo2Joo Hyun Park3Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South KoreaDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea; Technical Research Laboratory, Hyundai Steel, Dangjin, 31719, South KoreaDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea; Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Leuven, 3001, BelgiumDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea; Corresponding author.The desulfurization behavior of 316L stainless steel (STS316L) melt with the CaO-SiO2-CaF2-Al2O3-MgO slag was investigated with different CaO/SiO2 (=C/S) ratio and CaF2 content at 1873 K. As the C/S ratio increased, the sulfide capacity increased, whereas the sulfide capacity of the high C/S (=1.7) slag was not affected by CaF2 content. The overall mass transfer coefficient (kO) increased with C/S ratio, but was constant above a critical C/S value, and it was also constant across varied CaF2 content at relatively high C/S (=1.7) condition. Since the metal condition of the present study was constant, the change in kO was caused by slag phase mass transfer coefficient (ks) and sulfur distribution ratio (LS), which were affected by the physicochemical properties of the slag. Since desulfurization reaction requires consideration of both kinetic and thermodynamic factors, the ‘logCS2−−logη’ (where CS2− is sulfide capacity and η is viscosity), was proposed as a meaningful physicochemical parameter. If the slag basicity is relatively high, at which the kO is equivalent regardless of slag compositions, the desulfurization reaction is controlled by metal phase mass transfer. However, if the slag basicity becomes lower, at which the kO significantly decreases, the desulfurization reaction is assumed to be controlled by slag phase mass transfer and/or mixed controlled process.http://www.sciencedirect.com/science/article/pii/S2238785422003556Stainless steelSulfide capacityMass transfer coefficientKineticsViscosityBasicity |
| spellingShingle | Tae Su Jeong Jin Hyung Cho Jung Ho Heo Joo Hyun Park Desulfurization behavior of Si-killed 316L stainless steel melt by CaO-SiO2-CaF2-Al2O3-MgO slag Journal of Materials Research and Technology Stainless steel Sulfide capacity Mass transfer coefficient Kinetics Viscosity Basicity |
| title | Desulfurization behavior of Si-killed 316L stainless steel melt by CaO-SiO2-CaF2-Al2O3-MgO slag |
| title_full | Desulfurization behavior of Si-killed 316L stainless steel melt by CaO-SiO2-CaF2-Al2O3-MgO slag |
| title_fullStr | Desulfurization behavior of Si-killed 316L stainless steel melt by CaO-SiO2-CaF2-Al2O3-MgO slag |
| title_full_unstemmed | Desulfurization behavior of Si-killed 316L stainless steel melt by CaO-SiO2-CaF2-Al2O3-MgO slag |
| title_short | Desulfurization behavior of Si-killed 316L stainless steel melt by CaO-SiO2-CaF2-Al2O3-MgO slag |
| title_sort | desulfurization behavior of si killed 316l stainless steel melt by cao sio2 caf2 al2o3 mgo slag |
| topic | Stainless steel Sulfide capacity Mass transfer coefficient Kinetics Viscosity Basicity |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422003556 |
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