Article
Materials Science, Ceramics
Angelo Oliveira Silva, Dachamir Hotza, Ricardo Machado, Kurosch Rezwan, Michaela Wilhelm
Summary: An asymmetric alumina microfiltration membrane with high performance was prepared by combining freeze and tape casting techniques followed by two sintering steps. The morphology influences were investigated for different solid loadings, additives content and the assembled layer membrane structures. The assembled ceramic membrane had an average pore size between 30 and 50 m, suitable for microfiltration separation with porosity in the range of 26-50% and water flux of 11-32 m(3) m(-2) h(-1) bar(-1).
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Engineering, Chemical
Weidong Yang, Zhiguo Luo, Zongshu Zou, Chenxi Zhao, Yang You
Summary: This study developed a mathematical model with a coupled CFD-DBM approach to investigate the entrapment behavior and distribution of argon bubbles in the continuous casting process. The results showed that most bubbles are captured near the meniscus in the steel slab.
Article
Materials Science, Multidisciplinary
Jesus Gonzalez-Trejo, J. Raul Miranda-Tello, Francisco Cervantes-de-la-Torre, Ignacio Carvajal-Mariscal, Florencio Sanchez-Silva, Ruslan Gabbasov, Cesar A. Real-Ramirez
Summary: This study analyzes the effect of a flow divider on the performance of nozzles in slab continuous-casting machines. The performance of the nozzles was evaluated experimentally, and several factors affecting process stability and product quality were analyzed. The results show that nozzles with a flow divider have narrow and symmetric outlet jets, achieve a symmetrical double-roll flow pattern in the mold cavity, maintain a stable liquid-free surface, and do not increase bubble breakage or coalescence.
Article
Metallurgy & Metallurgical Engineering
Qingrui Lai, Zhiguo Luo, Yongjie Zhang, Yang You, Zongshu Zou
Summary: In this study, a new method is used to simulate the three-phase flow in a continuous casting mold, considering various interactions between bubbles and inclusions. The effects of simulation factors on the results are studied, and the importance of different factors is determined.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Fengming Du, Tianyi Li, Yunbo Zeng, Kaiguang Zhang
Summary: This paper investigates the influence of nozzle structure on the flow and solidification of steel during the continuous casting process. Three nozzle structures are compared, and the flow field, flow velocity, recirculation zone, turbulent kinetic energy, and heat transfer of the fluid steel are calculated. The results demonstrate that the B nozzle structure is the best, providing theoretical guidance for nozzle design in continuous casting.
Article
Nanoscience & Nanotechnology
Taijung Kuo, Lisa M. Rueschhoff, Matthew B. Dickerson, Tulsi A. Patel, Katherine T. Faber
Summary: The presented hierarchical porous composite material shows promise in optimizing filtration and catalysis applications by controlling both micro and mesopores on the material surface using freeze casting and self-assembled coatings. The material's permeability and mechanical properties are not compromised with the introduction of conformal coatings, leading to expectations for better filtration materials with higher throughput and reaction rates.
SCRIPTA MATERIALIA
(2021)
Article
Thermodynamics
Yan Zheng, Guo Yuan, Jian Kang, Guanglin Jia, Yang Zhao
Summary: A coupled 3-D model was established to study the effects of casting speed and nozzle diameter on the remelting of continuous casting billets. The results showed that casting speed had a more significant effect on the occurrence of remelting, while the diameter of the nozzle had a more obvious effect on the degree of remelting. Remelting did not occur when the casting speed was lower than 2 m/min, and it did occur when the casting speed was higher than 3 m/min. When the casting speed was 3 m/min, increasing the nozzle diameter led to a decrease in the degree of remelting, and the range of remelting first remained stable and then gradually decreased. Therefore, when the casting speed increased to 3-4 m/min, the nozzle diameter should be in the range of 30-40 mm.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Materials Science, Ceramics
Wenbo Du, Xiaohui Yin, Ali Zavabeti, Wei Meng, Qunshuang Ma, Lei Hu, Cao Wu, Gang Pang, Zhengjun Yao
Summary: The lamellar porous Ti3Si(Al)C2 material has been found to possess excellent permeability for mass transport and filtration applications. The permeability of the material is influenced by changes in the solid content. The unique structure and low flow resistance of the material contribute to its integrity and permeability even at high temperatures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Review
Computer Science, Artificial Intelligence
Ana Paula Miranda Diniz, Patrick Marques Ciarelli, Evandro Ottoni Teatini Salles, Klaus Fabian Coco
Summary: Continuous casting is the most economical and efficient method for steel plate production, but the issue of clogging in the submerged entry nozzle needs to be addressed. In this study, three methodologies based on deep neural networks were evaluated for detecting clogging in the steel industry using historical data, achieving promising results.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)
Article
Agronomy
Chen Gong, Dongyang Li, Can Kang
Summary: Bubble break-up is the main reason for the generation of perforations within an air-induction nozzle, leading to early break-up of the spray sheet and the production of large spray droplets. The nozzle configuration has a more significant effect on both the volumetric flow rate of intake air and the thickness of the spray sheet compared with the spray pressure.
PEST MANAGEMENT SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Quanle Leng, Hao Gu, Huan Yu, Dongxu Yao, Yongfeng Xia, Hanqin Liang, Yu-Ping Zeng
Summary: Porous yttria-stabilized zirconia (YSZ) ceramics with aligned and gradient pore channels were fabricated by adjusting the solid loading and sintering temperature. The microstructure and response properties could be controlled by these adjustments. Increasing the solid loading and sintering temperature resulted in higher compressive strength and larger pore channel size. These findings have practical value in the fabrication and optimization of porous ceramics for filters and membrane supports.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Metallurgy & Metallurgical Engineering
Pei Xu, Yong-zhi Zhou, Deng-fu Chen, Mu-jun Long, Hua-mei Duan
Summary: In this study, the authors conducted a new physical water modeling experiment to regulate the flow behavior in the mold during ultra-high speed continuous casting of billets. They optimized the parameters of the submerged entry nozzle and found that an inner diameter of 50mm, outer diameter of 95mm, and immersion depth of 180mm were suitable for the casting process. The results provide valuable insights for controlling the flow behavior in the mold during billet continuous casting at high speeds.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2022)
Article
Engineering, Chemical
Changyou Cai, Ming Zhao, Minggang Shen, Yuhua Pan, Xin Deng, Chunyang Shi
Summary: The flow behavior of molten steel in both traditional and new-type submerged entry nozzles was studied, and the results showed that the new-type nozzle can reduce impact depth and angle, generate swirl flow, improve velocity distribution, and minimize the possibility of nodulation.
Article
Metallurgy & Metallurgical Engineering
Jia-chen Pang, Guo-yu Qian, Sheng Pang, Wen-hui Ma, Guo-guang Cheng
Summary: A submerged entry nozzle (SEN) for slab casters operating at casting speed of 1 m/min was developed to solve slag entrapment and casting slab defects in the process of stainless steel continuous casting. The shape and angle of the outlet of the original SEN were controlled based on 3D numerical simulation and water modeling experiments. Experimental results showed that a square outlet with a 5° angle was a relatively ideal solution for stable mold and slag entrapment behavior.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Dejin Qiu, Zhaohui Zhang, Xintao Li, Ming Lv, Xiaoyu Mi, Xiaofeng Xi
Summary: In this study, a 3D model of a 160 mm x 160 mm billet ultrahigh-speed continuous casting mold was developed to investigate the effects of different casting parameters on molten steel flow. The results showed that the flow pattern in the mold was not influenced by casting speeds, submerged entry nozzle (SEN) immersion depths, or inner diameters. However, variation in casting speeds significantly affected the liquid level of the steel-slag interface. Increasing the inner diameter of the SEN weakened the initial kinetic energy of the jet, but also caused a deeper impact depth and upward movement in the raceway.
Article
Engineering, Mechanical
Hyunjin Yang, Surya P. Vanka, Brian G. Thomas
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
(2018)
Article
Metallurgy & Metallurgical Engineering
Haojian Duan, Lifeng Zhang, Brian G. Thomas
STEEL RESEARCH INTERNATIONAL
(2019)
Article
Materials Science, Multidisciplinary
Seong-Mook Cho, Brian G. Thomas, Seon-Hyo Kim
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Haojian Duan, Ying Ren, Brian G. Thomas, Lifeng Zhang
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2019)
Article
Metallurgy & Metallurgical Engineering
Matthew L. S. Zappulla, Seong-Mook Cho, Brian G. Thomas
STEEL RESEARCH INTERNATIONAL
(2019)
Review
Materials Science, Multidisciplinary
Seong-Mook Cho, Brian G. Thomas
Article
Engineering, Industrial
Matthew L. S. Zappulla, Seong-Mook Cho, Seid Koric, Hyoung-Jun Lee, Seon-Hyo Kim, Brian G. Thomas
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2020)
Review
Materials Science, Multidisciplinary
Seong-Mook Cho, Brian G. Thomas
Article
Materials Science, Multidisciplinary
Hyunjin Yang, Hamed Olia, Brian G. Thomas
Summary: Air aspiration is a significant issue in continuous casting of steel, leading to nozzle clogging and inclusions in final products. A 1-D pressure-energy model was developed to predict pressure distribution and throughput under dynamic operating conditions and varying clogging scenarios. Parametric studies showed that a smaller submerged entry nozzle diameter can reduce negative pressure by increasing friction losses.
Article
Materials Science, Multidisciplinary
Kun Xu, Brian G. Thomas, Yueyue Wu, Haichuan Wang, Hui Kong, Zhaoyang Wu
Article
Materials Science, Multidisciplinary
Seong Mook Cho, Brian G. Thomas, Jong-Yeon Hwang, Jong-Geun Bang, Il-Sin Bae
Summary: The research focuses on particle capture mechanisms in continuous steel casting and analyzes the process in slab casters using computational modeling. The model predictions are validated with plant measurements, revealing the distribution patterns of large particle captures.
Article
Engineering, Chemical
Mingyi Liang, Seong-Mook Cho, Xiaoming Ruan, Brian G. Thomas
Summary: A new model of particle entrapment during continuous casting of steel, considering the effects of multiphase flow and thermal buoyancy, is presented. The model simulates three capture mechanisms and the results are validated with plant measurements. It is found that superheat has negligible effect on mold flow, but higher superheat results in more complex flow in the lower strand, leading to fewer particle captures.
Article
Materials Science, Multidisciplinary
Ghavam Azizi, Brian G. Thomas, Mohsen Asle Zaeem
Summary: The study found that during solidification, gaps caused by thermal contraction form and grow the most in the early stages, remaining unchanged afterward. Increasing heat flux decreases the time for gap evolution and increases its depth. Alloys with lower carbon content are more sensitive to heat flux, while alloys with higher carbon contents show weaker sensitivity.
Article
Automation & Control Systems
Bryan Petrus, Zhelin Chen, Hamza El-Kebir, Joseph Bentsman, Brian G. Thomas
Summary: This paper investigates the one-dimensional Stefan problem and expresses the system state using enthalpy. By combining a full-state controller and an observer, output feedback trajectory tracking control strategies are proposed, and the closed-loop convergence of the temperature and interface errors for both single-sided and two-sided Stefan problems is proven. Simulation results demonstrate exponential-like trajectory convergence achieved by implementable smooth bounded control signals.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2023)
Article
Materials Science, Multidisciplinary
Y. Feng, M. Zaloznik, B. G. Thomas, A. B. Phillion
