Article
Engineering, Chemical
Vivek Kashyap, Patrick Taylor, Evody Tshijik Karumb, Michael Cheshire
Summary: A method to enhance the leaching kinetics of zinc refinery residue (ZRR) with significant impact on the leaching of zinc, gallium, and indium was introduced in the study. Reduction roasting of zinc ferrite (ZF) eased the leaching process, achieving over 90% extraction of the target elements. Characterization of ZRR was conducted using various techniques including LA ICP-MS, SEM, XRD, and automated mineralogy.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Huimin Tang, Zhiwei Peng, Liancheng Wang, Wenxing Shang, Anton Anzulevich, Mingjun Rao, Guanghui Li
Summary: A facile route for preparing zinc ferrite as a heavy-metal adsorption material from high-zinc EAF dust was proposed in this study. The addition of Fe2O3 was found to increase the formation of zinc ferrite to 94.13%. The purified product showed superior adsorption capacities for Pb (II), Cr (VI), and Cd (II).
Article
Thermodynamics
Weijiao Yang, Xiang Li, Yubo Liu, Baozhong Ma, Hua Wang, Xingming Jiang, Chengyan Wang
Summary: The study focuses on the kinetics process and thermodynamic parameters of African cobalt-rich copper sulfide ore in the activated roasting process, showing that the ore phase transition is significantly influenced by the heating rate, and the oxidation processes of different ore in CRCS conform to different kinetic mechanisms.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Zeqiang Xie, Guang Li, Yufeng Guo, Shuai Wang, Feng Chen, Lingzhi Yang, Ganghua Fu, Tao Jiang
Summary: The phase transformation behavior of zinc-containing dust was studied using a calcification roasting process, and zinc-iron separation behavior was examined by ammonia leaching. Results showed that increasing the calcium oxide to dust ratio promoted the conversion of zinc ferrite to zinc oxide. A zinc-iron recovery rate of 86.12% was achieved through ammonia leaching.
Article
Thermodynamics
Gongliang Wang, Xiaobo Min, Ning Peng, Zhongbing Wang
Summary: The reduction kinetics of zinc ferrite in CO atmosphere follows a step-wise mechanism influenced by reaction rate and diffusion, with higher CO concentrations accelerating the reduction process. The reduction is controlled by the rate of the first or second order in different CO conditions, with diffusion being the rate-determining step in the second stage.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Crystallography
Zeqiang Xie, Tao Jiang, Feng Chen, Yufeng Guo, Shuai Wang, Lingzhi Yang
Summary: In this study, CaO was used to degrade zinc ferrite and recover zinc through ammonia leaching. The experimental results demonstrated that the phase transformation of zinc ferrite to zinc oxide and dicalcium ferrite could be achieved completely with the addition of an appropriate amount of CaO. The ammonia leaching tests showed a high zinc leaching rate of approximately 90% under optimal roasting conditions.
Article
Metallurgy & Metallurgical Engineering
Yufang Wang, Kaixi Jiang, Hao Ma, Shuchen Qin, Chaozhen Zheng
Summary: This study investigated the behaviors of zinc and iron in the neutralized residue during pressure and hot acid leaching. The results showed that the acid to zinc mole ratio is the key factor for zinc extraction, while the extraction of iron is influenced by temperature and leaching time.
MINING METALLURGY & EXPLORATION
(2022)
Article
Engineering, Environmental
Liushun Wu, Hui Li, Kunlong Liu, Haiqing Mei, Yunjin Xia, Yuanchi Dong
Summary: Over 50 million tons of copper slag are produced worldwide annually, and the current stacking method for treatment results in resource wastage and environmental issues. This study focused on removing nonferrous metals from copper slag and reducing iron oxide. The experimental results showed that increasing the percentage of the chlorinating agent, temperature, and duration improved the removal percentages of copper, zinc, and lead. The proposed scheme involves chlorination roasting, reduction roasting, and melting to efficiently utilize copper slag.
Article
Engineering, Electrical & Electronic
Nawshin Yeasmin, M. K. R. Khan, M. M. Rahman, M. S. Sarker
Summary: This study successfully deposited nanocrystalline spinel thin films with different nickel contents using spray pyrolysis, and found that the Ni-Zn ferrite thin films exhibit semiconductor properties, with electrical characteristics varying with nickel content.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Green & Sustainable Science & Technology
Huimin Tang, Zhiwei Peng, Liancheng Wang, Anton Anzulevich, Mingjun Rao, Guanghui Li
Summary: This study explores the direct conversion of electric arc furnace (EAF) dust into zinc ferrite through roasting with a small amount of Fe2O3, focusing on the influence of roasting temperature on zinc conversion, phase transformation, microstructural evolution, and product magnetic property. The results show that zinc compounds in the dust react with iron components to form zinc ferrite at temperatures up to 1000°C due to favorable thermodynamics and high iron content. However, at temperatures above 1000°C, zinc conversion decreases due to the formation of zinc-containing impurity phases and the volatilization of zinc. After roasting at the optimal temperature of 1000°C for 2 hours, 94.13% of total zinc exists as insoluble zinc in the product, which exhibits good magnetic properties and can be used as a precursor for high-quality ferrite powders.
JOURNAL OF SUSTAINABLE METALLURGY
(2023)
Article
Metallurgy & Metallurgical Engineering
Vivek Kashyap, Patrick Taylor
Summary: The presence of iron in sphalerite leads to the formation of zinc ferrite, making the treatment of zinc refinery residues and electric arc furnace dust difficult. This study successfully extracted zinc selectively from zinc ferrite through partial reduction and leaching in dilute sulfuric acid, achieving a high zinc extraction rate.
MINING METALLURGY & EXPLORATION
(2021)
Article
Materials Science, Multidisciplinary
Da-wei Wang, Yan-jie Liang, Zhang Lin, Cong Peng, Bing Peng
Summary: This study proposed a novel method for recovering copper, zinc, and iron from copper slag through SO2-O-2 roasting-leaching-magnetic separation. The experimental results showed that high recovery rates and concentrations of the metals can be achieved under specific operating conditions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
F. Malamud, P. Northover, S. Northover, S. Nneji, J. Kelleher, N. C. Ciarlo, R. Geli Mauri
Summary: Spatially resolved neutron texture analyses were conducted on copper bolts from the Deltebre I (1813) shipwreck, revealing the use of at least three different manufacturing methods. These findings are significant in understanding the manufacturing processes of fastenings in the early 19th century and aiding in ship identification.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Analytical
Zeqiang Xie, Tao Jiang, Yufeng Guo, Shuai Wang, Feng Chen, Lingzhi Yang, Ganghua Fu
Summary: In this study, the magnetization roasting and ammonia leaching method were used to separate iron and zinc from zinc ferrite. It was found that controlling the appropriate temperature and atmosphere is crucial for the selective reduction of zinc ferrite to zinc oxide and ferric oxide. The influences of the selective reduction roasting process on the conversion rate, phase change, and microevolution behavior were investigated. The ammonia leaching experiment showed that a zinc leaching rate of 78.12% was achieved under specific conditions.
Article
Engineering, Environmental
Wenjuan Zhang, Jianyong Che, Peicheng Wen, Liu Xia, Baozhong Ma, Jun Chen, Chengyan Wang
Summary: An economic, efficient, and applicable approach to simultaneously remove and recover arsenic from copper smelting flue dust (CSFD) and arsenic sulfide residue (ASR) through a roasting process was proposed in this study. By optimizing parameters, a high efficiency of arsenic removal and purity can be achieved.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
A. Rogachev, D. Kovalev, A. Fourmont, S. Vadchenko, N. Kochetov, N. Shkodich, F. Baras, O. Politano, D. Moskovskikh
Summary: The dynamics of medium- and high-entropy phase formation during high-energy ball milling were investigated for various alloys. The study revealed a specific structural transformation that converts nanocrystalline intermediate solid solutions into single-phase multicomponent alloys.
INTERNATIONAL JOURNAL OF SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS
(2022)
Article
Materials Science, Multidisciplinary
Zh Eremeeva, S. A. Vorotylo, Yu Yu Kaplanskii, D. A. Sidorenko, D. Yu Kovalev, N. Shvyndina, A. S. Akhmetov, A. A. Saenko
Summary: The properties of gadolinium hafnate powders prepared by mechanochemical synthesis, including their crystalline state and morphological features, were studied. The results showed that after 30 minutes, gadolinium hafnate powder can form a single-phase nano-dispersed structure.
INORGANIC MATERIALS-APPLIED RESEARCH
(2022)
Article
Materials Science, Ceramics
V. I. Vershinnikov, D. Yu Kovalev
Summary: In this study, the V2AlC MAX phase was synthesized by self-propagating high-temperature synthesis (SHS) in molten NaCl salt, followed by acid leaching. The resulting powder product contains V2AlC, VAl, VC, MgO, MgAl2O4 phases. By adjusting the initial material ratios, a V2AlC powder with up to 95% purity was obtained.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
A. A. Vinokurov, D. Yu Kovalev, G. R. Nigmatullina, N. N. Dremova, S. P. Shilkin
Summary: In this study, almost spherical niobium diboride nanoparticles were successfully synthesized using ionic melts under specific conditions. The average size of these nanoparticles is around 12 to 17 nm, and they possess a hexagonal structure.
INORGANIC MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Arina G. Kicheeva, Ekaterina S. Sushko, Lyubov S. Bondarenko, Kamila A. Kydralieva, Denis A. Pankratov, Nataliya S. Tropskaya, Artur A. Dzeranov, Gulzhian I. Dzhardimalieva, Mauro Zarrelli, Nadezhda S. Kudryasheva
Summary: The current study investigates the role of reactive oxygen species (ROS) in the bioeffects of different types of magnetite nanoparticles (MNPs) - bare (Fe3O4), humic acids (Fe3O4-Ha), and 3-aminopropyltriethoxysilane (Fe3O4-APTES) modified MNPs. The study found that Fe3O4-HA MNPs had the lowest amount of Fe2+ ions, while Fe3O4-APTES MNPs had the highest amount of Fe2+ ions. Bioluminescent cellular and enzymatic assays were used to monitor the toxicity and antioxidant activity of the MNPs. The results showed that the modified MNPs had toxic effects at higher concentrations (>10(-2) g/L) and stimulated ROS production by bacteria in a wide concentration range (10(-15)-1 g/L).
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
A. S. Rogachev, S. G. Vadchenko, D. Yu. Kovalev, N. A. Kochetov, M. Zhukovskyi, T. Orlova, A. S. Mukasyan
Summary: The stability of high-entropy alloys is crucial for their fundamentals and practical applications. This study experimentally investigated the phase and microstructural evolution of a near-equiatomic Co0.18Cr0.20Fe0.24Ni0.19Ti0.19 alloy during long-term isothermal annealing. The alloy exhibited a stable composition after prolonged heat treatment, with released Ti atoms acting as getters for oxygen and forming sub-micron TiOx particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Crystallography
Dmitry Zinoveev, Liliya Pasechnik, Pavel Grudinsky, Anfisa Yurtaeva, Valery Dyubanov
Summary: This study investigates the influence of sodium sulfate addition on the kinetics of iron reduction and iron grain growth in red mud. The results show that the addition of sodium sulfate reduces the activation energy of the reduction process and models for the calculation of the average diameter of iron grains are obtained.
Article
Chemistry, Inorganic & Nuclear
Artur Dzeranov, Lyubov Bondarenko, Denis Pankratov, Gulzhian Dzhardimalieva, Sharipa Jorobekova, Daniel Saman, Kamila Kydralieva
Summary: The use of iron oxide nanoparticles, particularly for commercial purposes, requires strict preservation of their phase composition. The choice of nanoparticle modifier and modification conditions is crucial due to their sensitivity to oxygen under real conditions. This study investigated the phase composition changes of magnetite nanoparticles after modification and oxidation, and found that the nonstoichiometric nature of the nanoparticles increased. Furthermore, both XRD and Mössbauer spectroscopy provided valuable information about the ionic composition and distribution of iron ions in the nanoparticles.
Article
Chemistry, Inorganic & Nuclear
Artur Dzeranov, Lyubov Bondarenko, Denis Pankratov, Mikhail Prokof'ev, Gulzhian Dzhardimalieva, Sharipa Jorobekova, Nataliya Tropskaya, Ludmila Telegina, Kamila Kydralieva
Summary: This study analyzes a group of iron oxide nanoparticles as potential candidates for ferroptosis therapy, focusing on their phase state, magnetic characteristics, and the release of Fe2+/Fe3+ as ROS mediators. The results suggest that Fe3O4 and γ-Fe2O3 show promise as magnetically controlled carriers due to their saturation magnetization and surface area. The evaluation of Fe2+/Fe3+ ion release as catalysts for the Fenton reaction reveals that all nanoparticles, except α-FeOOH-Fe2+, are preferable for controlling Fenton catalysis. The high concentration of iron ions released by α-FeOOH-Fe2+ makes it suitable as an aid therapy agent.
Article
Chemistry, Physical
Dmitry Roshchupkin, Dmitry Kovalev
Summary: The ordered Ca3TaGa3Si2O14 and disordered La3Ga5SiO14 crystals were grown using the Czochralski method. Thermal expansion coefficients ac and aa were determined by analyzing X-ray diffraction spectra measured in the temperature range of 25 to 1000 degrees C. The results show that the coefficients are linear up to 800 degrees C but become nonlinear at higher temperatures due to the decrease in Ga content in the crystal lattice.
Editorial Material
Crystallography
Dmitry Zinoveev, Pavel Grudinsky, Valery Dyubanov
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
Chemistry, Multidisciplinary
Maksim Poliakov, Dmitry Kovalev, Sergei Vadchenko, Dmitry Moskovskikh, Philipp Kiryukhantsev-Korneev, Lidiya Volkova, Alexander Dudin, Andrey Orlov, Andrey Goryachev, Alexander Rogachev
Summary: In this work, a high-entropy thin-film CoCrFeNiTix was deposited on a Si/SiO2 substrate using magnetron sputtering. The film had an amorphous atomic structure and retained this structure after annealing up to 400°C. It showed a single-phase structure, a smooth surface, and a uniform distribution of elements. This study demonstrates the potential use of high-entropy alloy films as resistive elements in contemporary and future microelectronic devices.
Article
Materials Science, Multidisciplinary
Yu. V. Bogatov, V. A. Shcherbakov, D. Yu. Kovalev
Summary: TiC-NiTi cermet composites were fabricated by forced SHS compaction, and their phase composition, microstructure, and microhardness were characterized. The stoichiometry and particle size of TiC changed with the increase of Ni + Ti content, leading to a significant decrease in microhardness.
INTERNATIONAL JOURNAL OF SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS
(2023)
Article
Materials Science, Ceramics
A. Yu Potanin, E. A. Bashkirov, E. A. Levashov, P. A. Loginov, M. A. Berezin, D. Yu Kovalev
Summary: This paper focuses on studying the effect of mechanical activation on the macrokinetic characteristics of combustion and structure formation of Fe-Al-B reaction mixtures. By constructing phase diagrams and investigating structural phase transformations during combustion, the optimal mode for synthesizing a high percentage of Fe2AlB2 phase is determined.
CERAMICS INTERNATIONAL
(2023)
