Article
Metallurgy & Metallurgical Engineering
Katsuhiro Sasai
Summary: The formation and growth process of Al2O3 nuclei in molten steel during deoxidation experiments with aluminum addition has been analyzed, with the finding that the nucleation number density of Al2O3 increases as the degree of supersaturation increases and the interfacial tension decreases.
ISIJ INTERNATIONAL
(2022)
Article
Chemistry, Physical
Md Irfanul Haque Siddiqui, Latif Arifudin, Ibrahim Abdullah Alnaser, Masood Ashraf Ali, Khalid Alluhydan
Summary: This study expands on a previous numerical model to investigate the motion behavior of mold inclusions in the presence of interfacial tension effects. Using computational fluid dynamic simulations, the influence of interfacial tension on inclusion motion behavior near the solid-liquid interface was examined. A multiphase model was utilized, considering molten steel, sulfur, and alumina inclusions as different phases. The results show that the alteration in interfacial tension causes the inclusion particles to be pushed and swallowed near the solidifying boundaries, and the computational results are in good agreement with experimental correlations.
Article
Materials Science, Multidisciplinary
Dong-Hyun Kim, Jea-Bok Choi, Hae-Mi Hong, Yong-Min Cho, Young-Joon Park, Min-Ho Song, Youn-Bae Kang
Summary: The behavior of inclusions as particles on liquid Ultra-Low C (ULC) steel was investigated through in-situ observation and theoretical analysis. It was found that the presence of Ti did not influence the agglomeration force and acceleration when the oxygen potential was low, but resulted in a slight decrease in acceleration with increasing oxygen potential. The composition of inclusions on Ti-free steel surfaces was primarily alumina, while those on Ti-added steel surfaces included FetO-Al2O3 or FetO-TiOx(-Al2O3) depending on the oxygen potential. The analysis suggested that the formation of FetO-containing oxidation products lowered the contact angle between the inclusions and the liquid steel, leading to reduced agglomeration force and acceleration, although the model used in the study underestimated the agglomeration force.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Md Irfanul Haque Siddiqui, Ayidh Albaqami, Latif Arifudin, Khalid Alluhydan, Ibrahim Abdullah Alnaser
Summary: This study investigated the factors affecting the motion behavior of inclusions during continuous casting and simulated the inclusion motion using a numerical model. The results showed that the inclusion diameter, sulfur concentration, and melt temperature all had an impact on the inclusion distribution and entrapment percentage.
Article
Materials Science, Multidisciplinary
Vipul Kumar Gupta, Pradeep Kumar Jha, Pramod Kumar Jain
Summary: This study investigated the effect of thermal buoyancy on continuous casting using numerical simulations. The results showed that the large circulation loop generated by thermal buoyancy assists in inclusion removal and mixing. Gas bubbling affects the flow velocity of the molten metal in the tundish and decreases the dominance of natural convection.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Applied
Yong Zhu, Shanlong Tao, Xiaoyong Yang, Jiahua Liu, Mingxia Chen, Wenfeng Shangguan
Summary: This paper aims to improve the removal efficiency of PM1, which is the most difficult to remove in traditional purification technologies, by using collision enhancement and agglomeration effect. The effect of electric field and plate structure on collision enhancement is studied, and a novel structure of corrugated plate is proposed. Experimental results show that the external electric field plays a key role in particle collision enhancement, and the corrugated plate can achieve a 12% improvement in removal efficiency compared with traditional parallel plate, considering the collision enhancement brought by the airflow arrangement and agglomeration effect.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Engineering, Environmental
Qiting Xie, Ruimin Gu, Daohui Lin, Na Liu, Ruohua Qu, Fei Ge
Summary: In this study, an in situ assay was established using microscale thermophoresis (MST) and atomic force microscope (AFM) to determine the interfacial interaction between pollutants and organisms. The results showed that cationic and anionic surfactants had different effects on the adhesion of ZnO nanoparticles (NPs) to cells, while nonionic surfactants decreased the adhesion. The calculations indicated that cationic and anionic surfactants mainly disturbed the short-range hydration on the NP-cell interface, while cationic surfactants reduced the long-range electrostatic repulsion. Furthermore, there was a linear correlation between Zn bioaccumulation and dissociation constants (K-d) as well as adhesion force. Therefore, the in situ assay is of great significance for evaluating the environmental fate and ecological risk of pollutants.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Engineering, Environmental
Zhoujie Wang, Qiuyi Lu, Jingyi Wang, Jing Liu, Guangyi Liu, Wei Sun, Lei Xie, Qi Liu, Hongbo Zeng
Summary: Hydrophobic interactions are crucial in various mineral systems, affecting processes such as water treatment, particle separation, and self-cleaning or electrocatalysis in functional materials. The quantification and modulation of these interactions at the mineral/water interface provide insights into the underlying mechanisms of such particles’ interfacial processes. This review focuses on the nanomechanical understanding of hydrophobic interactions on mineral surfaces, discussing topics such as water structure, mineral surface wettability, agglomeration, bubble attachment, and adsorption of organics. The review also highlights the recent advances in using stimuli-responsive polymers to modulate hydrophobic interactions and identifies future research perspectives.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Shaohong Luo, Tamador Alkhidir, Sharmarke Mohamed, Shoaib Anwer, Baosong Li, Jing Fu, Kin Liao, Vincent Chan
Summary: This study systematically investigates the adhesive interfacial interactions of 2D heterogeneous materials and measures the adhesion energy of different interfaces. The results reveal that the charge density distribution from the oxygen species of graphene is responsible for the enhancement of the adhesive energy of the Ti3C2Tx-GO heterointerface.
APPLIED SURFACE SCIENCE
(2023)
Review
Engineering, Environmental
Yuru Liu, Ke Yin, Jiawei Wu, Daofeng Mei, Jukka Konttinen, Tero Joronen, Zhifeng Hub, Chao He
Summary: This review systematically analyzes the impact of ash compositions on the oxygen carrier in the chemical looping process (CLP), providing insights into the agglomeration and melting process caused by ash deposition. Strategies are proposed to mitigate the adverse effects of ash and recycle useful metals.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Katsuhiro Sasai
Summary: The study analyzed the nucleation and growth of Al2O3 nuclei, the growth, agglomeration, and removal of Al2O3 inclusions during the deoxidation process with consideration of interfacial properties. It was found that the nucleation number density and growth of Al2O3 were related to supersaturation and interfacial tension, explained by homogeneous nucleation theory. The growth mechanism of Al2O3 can be explained by Ostwald ripening, with cluster inclusions growing with increased agglomeration force.
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN
(2021)
Article
Materials Science, Multidisciplinary
Gengyi Dong, Xiaogang You, Liyang Dong, Yijiala Yiliti, Zhaohui Xu, Haijing Zhou, Yinong Wang, Yi Tan
Summary: The DD98M alloy was prepared by electron beam smelting, and the effect of electron beam smelting parameters on the inclusion removal behavior was studied. The results show that the O and N in the DD98M alloy can be effectively reduced by adjusting the smelting power and time. The inclusions are mainly concentrated in the central area of the electron beam, and are influenced by buoyancy and the Marangoni effect.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Review
Metallurgy & Metallurgical Engineering
Jingshe Li, Ye Sun, Shufeng Yang, Wei Liu
Summary: This article summarizes and discusses the removal process of inclusions in liquid steel, including the mathematical model, fluid mechanics model, and experimental verification method. The progress and limitations of the inclusion removal process are analyzed, and the numerical simulation research progress is comprehensively described.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Chemistry, Applied
Lei Zhou, Jiefei Zhang, Xiangning Liu, Hao Wu, Qian Guan, Guisheng Zeng, Linjun Yang
Summary: Fine particles emitted from coal-fired power plants are a major contributor to air pollution and health issues in China. Chemical agglomeration technology, which promotes the formation of larger particle aggregates, can improve the capture of fine particles by electrostatic precipitators. Experimental results showed that the addition of sesbania gum and styrene-butadiene emulsion significantly increased the concentration and particle size of fly ash particles, leading to higher dust removal efficiency. Furthermore, the use of a surfactant called T-100 further improved the removal efficiency and wetting performance.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ma de Jesus Soria-Aguilar, Antonia Martinez-Luevanos, Marco Antonio Sanchez-Castillo, Francisco Raul Carrillo-Pedroza, Norman Toro, Victor Manuel Narvaez-Garcia
Summary: Steelmaking residues have shown potential for removing Pb(II) through adsorption and precipitation mechanisms. The chemical and mineralogical composition of the residues, including components like CaO and MgO, significantly affect the removal of Pb(II).
ARABIAN JOURNAL OF CHEMISTRY
(2021)
