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Recently Published Articles
- Numerical Simulation of Flow-Induced Wall Shear Stresses in Three Different Shapes of Multi-Strand Steelmaking Tundishes
Md Irfanul Haque Siddiqui and Pradeep Kumar Jha
Article first published online: 15 OCT 2014 | DOI: 10.1002/srin.201400217
Numerical investigation of the effect of three different tundish shapes, i.e., boat, T-shape, and V-shape on generation of wall shear stress are carried out. Average wall shear stress value is maximum for V-shape tundish as compared to other two configuration tundishes. Similarity in variation of wall shear stress and turbulent kinetic energy is observed at different walls.
- Mathematical Modeling of Nitrogen Removal from the Vacuum Tank Degasser
Shan Yu, Jyrki Miettinen, Lei Shao and Seppo Louhenkilpi
Article first published online: 14 OCT 2014 | DOI: 10.1002/srin.201400093
This paper is focused on predicting nitrogen removal from the vacuum degasser specially taking into account the multi-component effect of steel composition. An integrated computational fluid dynamics (CFD) model is developed. Two operating diagrams are obtained to give the correlations between chemical reaction rate constant, initial nitrogen content, and final nitrogen content in liquid steel.
- Microstructural Refinement and Mechanical Properties of High-Speed Niobium-Microalloyed Railway Wheel Steel
Si Wu, Xiu-Cheng Li, Juan Zhang, Cheng-jia Shang and Raja Devesh Kumar Misra
Article first published online: 14 OCT 2014 | DOI: 10.1002/srin.201400236
The microstructure of railway wheel steel is refined and the percentage of ferrite is increased from 4 to 24% with the addition of 0.06% Nb. The addition of Nb inhibits mixed microstructure and delays the coarsening temperature of austenite grains from 880 to 960 °C. The impact energy at −20 °C is increased from 7.0 to 19.0 J with no apparent reduction in tensile strength. The grain refining and precipitation strengthening are roles of niobium in promoting ferrite–pearlite transformation and improving toughness in medium carbon steels.
- Influence of Al2O3 Content on Liquid Phase Proportion and Fluidity of Primary Slag and Final Slag in Blast Furnace
Shengli Wu, Wei Huang, Mingyin Kou, Xinliang Liu, Kaiping Du and Kaifa Zhang
Article first published online: 7 OCT 2014 | DOI: 10.1002/srin.201400158
The objective of this study is to understand the effect of Al2O3 on blast furnace operation by studying the properties of liquidus temperature, liquid phase proportion and fluidity of the primary slag in the cohesive zone and the final slag in the hearth of the blast furnace. The optimization measures by adding MgO content and increasing CaO/SiO2 are discussed.
- Effect of Water Vapor on Sulfur Distribution Between Liquid Fe and MgO-Saturated Slag Relevant to a Flash Ironmaking Technology
Yousef Mohassab and Hong Yong Sohn
Article first published online: 3 OCT 2014 | DOI: 10.1002/srin.201400197
For the first time, the effect of water vapor on the distribution of sulfur between slag and molten iron is studied for MgO-saturated CaOFeOAl2O3SiO2MnO (0.2–0.8 wt%)P2O5 (0.1–0.9 wt%) slags in the temperature range 1550–1600 °C under CO/CO2/H2/H2O, H2/H2O, and CO/CO2 with pO2 = 10−10–10−9 atm. Water in the gas atmosphere is found to increase LS.