Desulfurization behavior of Si-killed 316L stainless steel melt by CaO-SiO2-CaF2-Al2O3-MgO slagopen access
- Authors
- Jeong, Tae Su; Cho, Jin Hyung; Heo, Jung Ho; Park, Joo Hyun
- Issue Date
- May-2022
- Publisher
- Elsevier Editora Ltda
- Keywords
- Stainless steel; Sulfide capacity; Mass transfer coefficient; Kinetics; Viscosity; Basicity
- Citation
- Journal of Materials Research and Technology, v.18, pp 2250 - 2260
- Pages
- 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of Materials Research and Technology
- Volume
- 18
- Start Page
- 2250
- End Page
- 2260
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/107827
- DOI
- 10.1016/j.jmrt.2022.03.048
- ISSN
- 2238-7854
2214-0697
- Abstract
- 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 (k(O)) 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 k(O) was caused by slag phase mass transfer coefficient (k(s)) 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 'log CS2- -log h' (where C(S2-& nbsp;)is sulfide capacity and h is viscosity), was proposed as a meaningful physicochemical parameter. If the slag basicity is relatively high, at which the k(O) 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 k(O) significantly decreases, the desulfurization reaction is assumed to be controlled by slag phase mass transfer and/or mixed controlled process. (C) 2022 The Authors. Published by Elsevier B.V.& nbsp;
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