| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
11th International Symposium on High Temperature Metallurgical Processing
|
| Presentation Title |
M-12: Effect of Steel–slag Reaction on Physicochemical Properties of Low-reactivity Mold Fluxes |
| Author(s) |
Xiaobo Yan, Yuanbing Wu, Qiangqiang Wang, Shengping He, Qian Wang |
| On-Site Speaker (Planned) |
Xiaobo Yan |
| Abstract Scope |
Contact experiments between low-reactivity CaO–BaO–Al2O3-based mold fluxes with different Al2O3/SiO2 mass ratios, 1.6 (F-1) and 2.5 (F-2), and 1.4–2.2 mass% Al-containing steels were conducted to investigate the effect of interfacial reaction on mold flux properties and the ultimate limit of reaction duration capacity of the developed mold flux. 1.0 mass% Al addition was added into the molten steel every 20 minutes to maintain the Al content constant and mimic the constant renewal of fresh molten steel at the steel–slag interface in actual continuous casting process. The main results revealed that SiO2, Na2O, and B2O3 in the mold flux were involved in the interfacial reaction and the reactivity of Na2O was weaker than those of SiO2 and B2O3 in the mold flux. The variation in slag properties indicated that both reaction durations between F-1 reacting with TWIP steel, and F-2 reacting with 20Mn23AlV steel could lasted for 40 min; the viscosity at 1300 ℃ and break temperature of F-1 increased from 0.06 to 0.29 Pa•s and 1290 (1017) to 1434 K (1161 ℃), respectively, during the process; and those for F-2 increased from 0.08 to 0.29 Pa•s and 1266 (993) to 1435 K (1162 ℃), respectively. Comparing their basic properties of F-1 and F-2 after interfacial reaction with different steel grades, while F-2 had wider potential applicability for the continuous casting of Al-containing steels. |
| Proceedings Inclusion? |
Planned: |