|
|
|
| Crystallization behavior of blast?furnace slag by single hot thermocouple technique |
| Tie-lei Tian1,2, Shuang Cai1, Yu-zhu Zhang1,2, Hong-wei Xing1 |
| 1 College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, Hebei, China; 2 College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China |
|
|
|
|
Abstract The crystallization behavior of blast-furnace slag under isothermal and continuous-cooling conditions was studied using the single hot thermocouple technique. The crystallization phases were obtained using FactSage software and X-ray diffrac- tometry. The crystallization kinetic parameters were calculated by combining these results with the Johnson–Mehl–Avrami model. Under isothermal conditions, the shortest crystallization incubation time was 24 and 18 s when the temperatures were 1300 and 1150 °C, and the corresponding critical cooling rates were 4.5 and 14.3 °C/s, respectively. At 1270 °C, the slag was difficult to crystallize and the fiber-forming rate improved. When the continuous-cooling rate was 6.5 °C/s, the slag solidified into a glassy state. The main crystallization phases, gehlenite, akermanite, anorthite, and melangite, were most easily precipitated. The growth factors of melangite and anorthite were approximately 1.63 and 1.68, respectively, which indicated that the crystals nucleated on the surface and grew in two dimensions.
|
|
|
|
|
|
| Cite this article: |
|
Tie-lei Tian,Shuang Cai,Yu-zhu Zhang, et al. Crystallization behavior of blast?furnace slag by single hot thermocouple technique[J]. Journal of Iron and Steel Research International, 2020, 27(3): 259-265.
|
|
|
|
| [1] |
Ding-li Zheng, Cheng-bin Shi, Zhi-jun Li, Jing Li, Jung-wook Cho. Effect of SiO2 substitution with Al2O3 during high-Al TRIP steel casting on crystallization and structure of low-basicity CaO–SiO2-based mold flux[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(1): 33-41. |
| [2] |
Hui Liu, Zong-ze Huang, Da-jiang Yu, De-lin Hu, Hong-gang Zhong, Qi-jie Zhai, Jian-xun Fu. Effect of cooling rate on microstructure and inclusion in non-quenched and tempered steel during horizontal directional solidification[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(9): 973-982. |
| [3] |
Chen Dong, Hui-bin Wu, Xi-tao Wang. Effect of cooling rate on microstructure, hardness, and residual stress of 0.28C–0.22Ti wear-resistant steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(8): 866-874. |
| [4] |
Lei Zhang, Wan-lin Wang, Han-qing Shao. Review of non-reactive CaO–Al2O3-based mold fluxes for casting high-aluminum steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(4): 336-344. |
| [5] |
Nathalie Kolbl, Irmtraud Marschall, Harald Harmuth. High-temperature investigation of mould slag crystallization by single and double hot thermocouple techniques[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(4): 345-354. |
| [6] |
Irmtraud Marschall, Nathalie Kolbl, Harald Harmuth, Christina Atzenhofer. Identification of secondary raw materials in mold powders and their melting behavior[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(4): 403-411. |
|
|
|
|
2020, Vol. 27 
