Results 21 to 30 of about 211 (161)

Selective Recovery of Critical Minerals from Simulated Electronic Wastes Via Reaction-Diffusion Coupling. [PDF]

ChemSusChem
We achieve the facile separation of Fe, Dy, and Nd from model solutions of electronic waste using reaction‐diffusion coupling. Using a suite of X‐ray imaging, characterization, atomistic, and continuum simulations, we develop a predictive model for the distribution of the components in the reaction medium.
Wang Q, Fu Y, Miller EA, Song D, Brahana PJ, Ritchhart A, Xu Z, Johnson GE, Bharti B, Sushko ML, Nakouzi E.   +10 more
europepmc   +2 more sources

Operando Characterization of Uranium Dendrite Growth in High-Temperature Molten Salt Electrochemistry by Synchrotron X-Ray Tomography and Diffraction. [PDF]

Adv Sci (Weinh)
An operando methodology combining synchrotron X‐ray micro‐computed tomography (SR‐µCT) and high‐energy X‐ray diffraction (HEXRD) investigates uranium dendrite electrodeposition in LiCl‐KCl‐UCl3 molten salt. This enabled in‐situ visualization of dendrite growth and ion diffusion dynamics.
Liu K, Tan T, Zhong Y, Wang Y, Bo T, Bai Z, Wang S, Zhang K, Huang W, Zeng J, Shi W.   +10 more
europepmc   +2 more sources

Forecasting Copper Electrorefining Cathode Rejection by Means of Recurrent Neural Networks With Attention Mechanism

IEEE Access, 2021
Electrolytic refining is the last step of pyrometallurgical copper production. Here, smelted copper is converted into high-quality cathodes through electrolysis.
Pedro Pablo Correa, Aldo Cipriano, Felipe Nunez, Juan Carlos Salas, Hans Lobel   +4 more
doaj   +1 more source

Automated Surface Defect Detection in Copper Blanks Using YOLOv8 Segmentation and EfficientNetV2-S Classification [PDF]

Journal of Artificial Intelligence and Data Mining
In this study, an intelligent deep learning–based system is proposed for automated detection of surface defects in copper cathode blanks used in the electrorefining process.
Hossein Ghayoumi Zadeh, Ali Fayazi, khosro rezaee, Afsaneh Aminaee, Hadi Halavati, Mehdi Tahernejad, Hadi Memarzadeh, Ali Masoumi, Mohammad Sadegh Jafari   +8 more
doaj   +1 more source

Statistical analysis of the distribution of impurities during copper electrorefining

Izvestiya Vuzov. Tsvetnaya Metallurgiya (Universities' Proceedings Non-Ferrous Metallurgy), 2021
Electrolytic copper refining makes it possible to obtain high purity metal, so the analysis of the main ways of impurity transition into electrolysis products is an actual problem. If it is solved, the process can be controlled when changing the composition of raw materials and, as a result, the content of impurities in the anodes.
Ostanin, N. I., Rudoy, V. M., Demin, I. P., Ostanina, T. N., Nikitin, V. S.   +4 more
openaire   +3 more sources

Primary Copper Smelter and Refinery as a Recycling Plant—A System Integrated Approach to Estimate Secondary Raw Material Tolerance

Recycling, 2017
The primary production of sulfide concentrates includes smelting to copper matte or blister copper, conversion of matte to blister copper, and refining to copper.
Olof Forsén, Jari Aromaa, Mari Lundström   +2 more
doaj   +1 more source

Effect of Thiourea on Copper Electrorefining

Journal of MMIJ, 2009
The effect of thiourea on copper electrodeposition has been investigated by measuring the cathodic polarization curves for aqueous H2SO4-CuSO4 solutions and observing the surface morphology of deposited Cu. The cathode potential for Cu deposition was depolarized by the addition of thiourea less than 0.1 mmol/L, whereas it was significantly polarized ...
KUBOYAMA, Hiroshi, NAKANO, Hiroaki, OUE, Satoshi, FUKUSHIMA, Hisaaki, KOBAYASHI, Shigeo   +4 more
openaire   +2 more sources

Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery

Metals, 2021
In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method.
Jovana Djokić, Dragana Radovanović, Zlatko Nikolovski, Zoran Andjić, Željko Kamberović   +4 more
doaj   +1 more source

Electrochemical behavior and in situ observation of galvanic couples of copper and silver or zinc wires in acidic copper sulfate solutions

Journal of MMIJ, 2023
The anodic dissolution reaction of copper in copper electro-refining was studied by considering the reaction of galvanic couples with different metals as impurities.
Yasushi TAKASAKI, Shoichi KAWAKAMI, Hinako KUBO, Hiroyuki KANEKO   +3 more
doaj   +1 more source

Removal of Sb Impurities in Copper Electrolyte and Evaluation of As and Fe Species in an Electrorefining Plant

Metals, 2021
Antimony and arsenic concentrations and their oxidation states (Sb(III), Sb(V), As(III) and As(V)) in copper electrorefining electrolyte can affect copper cathode quality through the formation of floating slimes.
Ana I. González de las Torres, Michael S. Moats, Guillermo Ríos, Ana Rodríguez Almansa, Daniel Sánchez-Rodas   +4 more
doaj   +1 more source