Article
Materials Science, Coatings & Films
Hossein Alian Moghadam, Majid Jabbari, Saeed Daneshmand, Saeid Rasouli Jazi, Arezoo Khosravi
Summary: The consumption of graphite electrodes in arc furnaces is a major factor in steel production costs, and reducing consumption can help lower production costs. This study uses simulation and experimental methods to analyze the effects of using a TiO2/SiC/SiO2 coating on electrode consumption, finding that coating can optimize consumption. Furthermore, simulations show that coating electrodes with layers of varying thickness can effectively change the conical height of the electrode head.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Xinran Zhu, Qiang Zhang, Yongsheng Sun, Yanjun Li, Yuexin Han
Summary: This study presents a fluidization roasting technology for siderite-bearing iron ore without the use of carbon additives. The effects of different parameters on the magnetic separation performance were explored, and the samples were characterized using various methods. The results showed that it is possible to obtain high-grade and high-recovery iron concentrate under specific conditions.
Article
Chemistry, Physical
Saeed Daneshmand, Mohammad Heydari Vini, F. Al-dolaimy, Benien M. Ridha, Ali H. Alsalamy, Navid Nasajpour-Esfahani, M. Hekmatifar
Summary: Electric ARC furnaces (EAF) are used to melt metal materials using electric ARC at temperatures ranging from 1600 to 3000 celcius. Lime, fluorine, iron, and ferroalloys can be used in these furnaces to produce steel or cast iron. Graphite electrodes are essential components in EAF, transferring current through an electric ARC. This study evaluates the effectiveness of a SiO2/TiO2 coating in reducing electrode corrosion through numerical simulation, experiments, and industrial testing. The results show that the ceramic coating can effectively reduce electrode consumption when applied in two layers on the surface of graphite electrodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Zheng Lei, Zongtao Zhu, Hui Chen, Yuanxing Li
Summary: This study investigates the effects of coaxial hybrid welding of fiber laser and hollow tungsten arc on weld depth and explores the mechanism behind it. The results show that by controlling the laser power and current parameters, the weld penetration depth can be effectively increased.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Crystallography
Pavel Grudinsky, Dmitry Zinoveev, Alex Kondratiev, Leonid Delitsyn, Ruslan Kulumbegov, Anton Lysenkov, Pavel Kozlov, Valery Dyubanov
Summary: This study focuses on the reduction smelting of Waelz slag to produce iron-based alloy. Thermodynamic simulation and reduction smelting experiments were conducted to predict temperatures and compositions. The experiments confirmed the feasibility of Waelz slag reduction smelting from EAF dust processing.
Article
Physics, Applied
Xiangyi Meng, Na Lu, Shiye Cheng, Yubing Li, Dongping Liu, Kefeng Shang, Nan Jiang
Summary: A dielectric-boosted gliding arc discharge (DBGAD) reactor was developed to enhance plasma processing capability. It investigated the electrical, gliding arc motion, and energy injection characteristics. By situating a 50mm quartz dielectric underneath the plasma area, a higher discharge power and extended arc gliding time were achieved. Compared to gliding arc discharge (GAD), DBGAD demonstrated a 27% increase in arc stabilization gliding time and 1.12 times superior average discharge power.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Andrea Scarcello, Francesca Alessandro, Melvin Arias Polanco, Cristian Vacacela Gomez, Denia Cid Perez, Giorgio De Luca, Efrem Curcio, Lorenzo S. Caputi
Summary: This study presents a synthesis of iron microspheres wrapped by graphitic layers in water-submerged arc discharge experiments, showing the presence of TBLG and turbostratic graphite with different rotation angles. These results pave the way for the synthesis of robust graphitic materials with the electronic properties of SLG.
APPLIED SURFACE SCIENCE
(2021)
Article
Electrochemistry
Chenteng Sun, Qiaoling Wang, Wen Tao, Aqiao Li, Qian Xu, Ying Li, Shenggang Li, Xingli Zou, Hongwei Cheng, Xionggang Lu
Summary: The anodic dissolution of hypoeutectic cast iron consisting of pearlite and ledeburite in sulfuric acid solution was investigated using electrochemical methods. The oxidation activities of the two phases in cast iron, ferrite and cementite, were evaluated based on their structural and electronic properties using first-principles calculations. The results indicate that ferrite undergoes anodic dissolution at a more negative potential compared to cementite. The microstructure of pearlite is more prone to crumbling during anodic dissolution compared to ledeburite due to the higher amount of ferrite dissolution from the pearlite framework. First-principles calculations demonstrate that the Fe 3d-band center of iron is closer to the Fermi level than that of cementite, indicating higher activity of iron atoms in ferrite and their susceptibility to electrophilic attack. This intrinsic reason explains why cementite is more stable than ferrite under anodic polarization in sulfuric acid solution.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Engineering, Manufacturing
V. M. Gobinath, K. Annamalai
Summary: The study demonstrated that the addition of Tellurium strongly influenced the formation of chill and effectively enhanced the mechanical properties of the tappet, while also eliminating the mottled zone and creating a clear boundary between the chill zone and gray zone.
MATERIALS AND MANUFACTURING PROCESSES
(2021)
Article
Physics, Fluids & Plasmas
Ke Shao, Su-Rong Sun, Xian Meng, He-Ji Huang, Ya-Hao Hu, Hai-Xing Wang
Summary: This study experimentally investigated the effect of argon addition on the disappearance of old arc roots, the movement of the overall arc, and the generation of new arc roots in the nitrogen arc restrike process. The results showed that argon addition can decrease the temperature of the arc root, prolong the coexistence time of old and new arc roots, and increase the likelihood of new arc roots occurring at the upstream location.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Wei Meng, Yunlong Lei, Xing Wang, Qunshuang Ma, Lei Hu, Hu Xie, Xiaohui Yin
Summary: In this study, a nickel-based superalloy Inconel 625 was deposited on the surface of ductile cast iron using the cold metal transition welding process. The effects of heat input on the microstructure and interfacial characteristics of the deposited layers were investigated. The results showed that a good metallurgical bonding between the deposited layer and ductile iron could be achieved, and the microhardness of the deposited layer was higher than that of ductile iron.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Environmental Sciences
Abdul Qayoom Memon, Shoaib Ahmed, Zulfiqar Ali Bhatti, Ghulamullah Maitlo, Abdul Karim Shah, Shaukat Ali Mazari, Atta Muhammad, Abdul Sattar Jatoi, Ghulam Abbas Kandhro
Summary: The indigenous hematite iron ore was chemically activated to remove arsenic efficiently under specific conditions. Langmuir and Freundlich isotherms were used to evaluate adsorption potential, with a maximum adsorption capacity observed through Langmuir isotherm. Kinetics of arsenic adsorption showed the best fit with pseudo-first-order kinetics. Characterization of the hematite iron ore before and after arsenic adsorption was conducted using XRD, SEM, and EDX.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Dawei Liu, Weijun Xie, Zehan Xu, Peiquan Deng, Zhaozhi Wu, Igor Zhitomirsky, Wenxia Wang, Ri Chen, Li Zhou, Yunying Xu, Kaiyuan Shi
Summary: This study develops a simple and low-cost electric discharge ablation technique for fabricating ceramic supercapacitor electrodes. The obtained microsupercapacitors show superior capacitive behavior.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Physics, Fluids & Plasmas
P-Y C. R. Taunay, C. J. Wordingham, E. Y. Choueiri
Summary: A model has been developed to study the physics of thermionic, orificed hollow cathodes, which has been validated using experimental data. The model focuses on evaluating the total static pressure and its variation with controllable parameters in order to understand important plasma parameters in the cathode. The model combines various conservation equations and diffusion models to calculate all plasma quantities. Experimental data and literature data were utilized to validate the model, and good agreement was achieved. The model can be applied to study the scaling of total pressure in thermionic, orificed hollow cathodes and propose new cathode design rules.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Jakob Gussmagg, Michael Pusterhofer, Florian Summer, Florian Gruen
Summary: This paper investigates the origin and evolution of scuffing in a ring-on-liner contact using an experimental approach. A four-stage scuffing hypothesis is developed based on the analysis. The first stage involves the formation of a scaly structure on the liner surface due to smearing of the honing structure and formation of surface cracks. The second stage is characterized by the formation of breakouts in the liner surface due to crack growth induced by adhesive shear forces.
Article
Metallurgy & Metallurgical Engineering
A. V. Pavlov, O. P. Onorin, N. A. Spirin, A. A. Polinov
Article
Metallurgy & Metallurgical Engineering
A. V. Pavlov, O. P. Onorin, N. A. Spirin, A. A. Polinov
Article
Metallurgy & Metallurgical Engineering
A. V. Pavlov, A. A. Polinov, N. D. Spirin, O. P. Onorin, V. V. Lavrov
Article
Metallurgy & Metallurgical Engineering
A. A. Polinov, A. V. Pavlov, G. N. Logachev, O. P. Onorin, N. A. Spirin
Article
Metallurgy & Metallurgical Engineering
O. P. Onorin, N. A. Spirin, A. S. Istomin, V. V. Lavrov, A. V. Pavlov
Article
Metallurgy & Metallurgical Engineering
A. A. Polinov, A. V. Pavlov, S. N. Pishnograev, G. N. Logachev, N. A. Spirin
Article
Metallurgy & Metallurgical Engineering
L. A. Zainullin, V. G. Karelin, D. A. Artov, A. Yu. Epishin, N. A. Spirin
Article
Metallurgy & Metallurgical Engineering
L. A. Zainullin, A. Yu Epishin, N. A. Spirin
Article
Metallurgy & Metallurgical Engineering
O. P. Onorin, A. A. Polinov, A. Pavlov, N. A. Spirin, I. A. Gurin
Article
Metallurgy & Metallurgical Engineering
A. A. Polinov, A. V. Pavlov, O. P. Onorin, N. A. Spirin, I. A. Gurin
Article
Metallurgy & Metallurgical Engineering
L. A. Zainullin, A. Yu. Epishin, V. G. Karelin, D. A. Artov, N. A. Spirin
Proceedings Paper
Physics, Applied
Alexandr Shindrov, Denis Artyukhov, Maria Vikulova, Nikolay Spirin, Natalya Nikitina, Nikita Savin, Nikolay Gorshkov, Igor Burmistrov
PROSPECTS OF FUNDAMENTAL SCIENCES DEVELOPMENT (PFSD-2017)
(2017)
Proceedings Paper
Engineering, Industrial
N. A. Spirin, I. A. Gurin, N. Grebneva
2017 INTERNATIONAL CONFERENCE ON INDUSTRIAL ENGINEERING, APPLICATIONS AND MANUFACTURING (ICIEAM)
(2017)
Proceedings Paper
Engineering, Industrial
I. A. Gurin, N. A. Spirin, V. V. Lavrov
2017 INTERNATIONAL CONFERENCE ON INDUSTRIAL ENGINEERING, APPLICATIONS AND MANUFACTURING (ICIEAM)
(2017)
