Article
Metallurgy & Metallurgical Engineering
Rajneesh Kumar, Ambrish Maurya, Pradeep Kumar Jha
Summary: The effect of bifurcated submerged entry nozzle (SEN) port angles on transient flow, solidification, and inclusion behavior in a bloom caster mold with electromagnetic stirring (EMS) was investigated using a 3D numerical model. The results showed that EMS significantly influenced the flow behavior by generating a swirl flow pattern that hindered the movement of inclusions downward in the domain. The bifurcated SEN with a port angle of 30° (without EMS) was seen to reduce inclusion entrapment and enhance inclusion removal.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Engineering, Chemical
Wei Chen, Lifeng Zhang, Yadong Wang, Sha Ji, Ying Ren, Wen Yang
Summary: A computational model was established to investigate two-phase flow and slag entrainment during steel bloom continuous casting, revealing that slag entrainment mainly occurred around 1/4 width of the mold, with most slag droplets having an equivalent diameter of 2-6 mm.
Article
Materials Science, Multidisciplinary
Shifu Chen, Hong Lei, Hanchuang Hou, Changyou Ding, Han Zhang, Yan Zhao
Summary: Removing inclusions from molten steel using RH vacuum refining is crucial in producing high-quality steel products. Research shows that argon bubbles significantly enhance the transport and collision-coalescence of inclusions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Manufacturing
Vipul Kumar Gupta, Pradeep Kumar Jha, Pramod Kumar Jain
Summary: The study developed a multiphase numerical model to simulate the continuous casting process of steel bloom. Two different SEN configurations were considered, and their influence on flow pattern, temperature distribution, solidification thickness, interface fluctuation, and inclusion behavior was analyzed. The effects of mold electromagnetic stirring (M-EMS) on these parameters were also examined. The results showed that the angle of the SEN had a significant impact on the inclusion removal, interface level, and solidification thickness. The presence of M-EMS changed the flow pattern below the SEN, resulting in fluctuation in shell thickness and decreased steam penetration.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Article
Metallurgy & Metallurgical Engineering
Kengo Kihara, Nobuhiro Okada, Shun Saito, Kento Kawashima
Summary: In this study, a numerical simulation model was developed to predict negative segregation in the continuous casting process. The results from the simulation were comparable to experimental and analytical results, indicating the accuracy and usefulness of the model.
ISIJ INTERNATIONAL
(2022)
Article
Chemistry, Physical
Pengchao Li, Guifang Zhang, Peng Yan, Peipei Zhang, Nan Tian, Zhenhua Feng
Summary: Electromagnetic stirring (M-EMS) is widely used in continuous casting production to reduce casting billet defects. A 3D multi-physics coupling model was established to investigate the effect of M-EMS on billet segregation and simulate the heat, momentum, and solute transfer behavior. The results show that M-EMS can move the high-temperature zone upward and promote rotational flow, with optimal control at 300 A and a frequency of 3 Hz. The choice of M-EMS parameters is crucial for billet quality.
Article
Materials Science, Multidisciplinary
Daniela Fatima Gomes, Bernardo Martins Braga, Roberto Parreiras Tavares, Mauricio Covcevich Bagatini, Carlos Berlini Filho, Gabriela Pereira Maciel
Summary: This study investigates the feasibility of producing blooms and beam blanks in a continuous casting machine using a single support rollers setup. A mathematical model for heat transfer and solidification was developed and validated with experiments. The results show that a single roller setup can effectively produce steel products with minimal variations in temperature, supporting the feasibility of this approach.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Industrial
Zhao Zhang, Menghuai Wu, Haijie Zhang, Susanne Hahn, Franz Wimmer, Andreas Ludwig, Abdellah Kharicha
Summary: Mold electromagnetic stirring (M-EMS) promotes the formation of a central equiaxed zone in continuous casting of steel billets. The main functions of M-EMS are to dissipate superheat in the mold region and induce crystal fragmentation. The formation of the equiaxed zone is influenced by species/energy transport mechanisms, and the efficiency of M-EMS is affected by parameters such as the shielding effect of the copper mold and the electrical conductivity of the strand shell.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Jujin Wang, Lifeng Zhang, Yuexin Zhang, Gong Cheng, Yadong Wang, Ying Ren, Wen Yang
Summary: The transformation of non-metallic inclusions in the first continuous casting bloom of a bearing steel was studied through industrial trials and theoretical calculations. The cooling rate affected the transformation of inclusion composition, with transformation occurring preferentially at the quarter thickness of the bloom. Transformation rate of inclusions was dominated by temperature.
ISIJ INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Heping Liu, Yanqing Chen, Hao Qiu, Zhongying Wang
Summary: This study numerically describes the magnetically driven fluid flow and solidification process in a curved round bloom continuous caster for production of a high-strength low-alloy steel grade using combined electromagnetic stirring technology. The effects of casting speed and the position of the stirring on solidification and electromagnetic stirring are analyzed.
IRONMAKING & STEELMAKING
(2022)
Article
Computer Science, Software Engineering
Bolun Wang, Zachary Ferguson, Xin Jiang, Marco Attene, Daniele Panozzo, Teseo Schneider
Summary: This paper introduces the first exact root parity counter for continuous collision detection (CCD). The algorithm computes the parity of the number of roots of the cubic polynomial in CCD queries, providing exact results without the need for numerical parameter tuning. The method demonstrates comparable performance to efficient approximate algorithms and can be easily integrated into existing simulators.
COMPUTER GRAPHICS FORUM
(2022)
Article
Metallurgy & Metallurgical Engineering
Aleksey Smirnov, Aleksey Verzilov, Anastasiia Semenko, Yuliia Skorobagatko, Danyil Hoida
Summary: The article presents the results of comprehensive studies on the hydrodynamic processes and features of single-strand tundish ladles. It discusses the physical and mathematical modelling of melt flows using different designs of metal receivers. The article also highlights the significance of the position and height of the metal receiver walls in determining the movement of convective flows and the possibility of increased turbulence in certain areas.
METALLURGICAL RESEARCH & TECHNOLOGY
(2023)
Article
Construction & Building Technology
Saqr Khalfan Ali Alkaabi, Safiah Sidek
Summary: This paper presents a quantitative study on assessing the factors contributing to continuous usage of M-government services among users. User satisfaction was found to be the most important factor for enhancing the usage of M-government services. The findings provide valuable insights for improving M-government services.
INTERNATIONAL JOURNAL OF SUSTAINABLE CONSTRUCTION ENGINEERING AND TECHNOLOGY
(2022)