Results 1 to 10 of about 211 (161)

Copper Cathode Contamination by Nickel in Copper Electrorefining [PDF]

Metals, 2021
Nickel behavior has a significant role in the electrorefining of copper, and although it has been extensively studied from the anode and electrolyte point of view over the past decades, studies on nickel contamination at the cathode are limited.
Mika Sahlman, Jari Aromaa, Mari Lundström   +2 more
doaj   +6 more sources

Electrorefining Process of the Non-Commercial Copper Anodes [PDF]

Metals, 2021
The electrorefining process of the non-commercial Cu anodes was tested on the enlarged laboratory equipment over 72 h. Cu anodes with Ni content of 5 or 10 wt.% and total content of Pb, Sn, and Sb of about 1.5 wt.% were used for the tests. The real waste
Radmila Markovic, Vesna Krstic, Bernd Friedrich, Srecko Stopic, Jasmina Stevanovic, Zoran Stevanovic, Vesna Marjanovic   +6 more
doaj   +6 more sources

Novel Additives in Copper Electrorefining—Small Laboratory Scale [PDF]

Materials
This research aimed to evaluate the effectiveness of new organic substances, including a novel ionic liquid based on polyhexamethylenebiguanidine, polyhexamethyleneguanidine, and safranin in the copper electrorefining process. Experiments were conducted on a small laboratory scale using industrial copper anodes.
Wojciech Simka, Katarzyna Leszczyńska-Sejda, Patrycja Kowalik   +2 more
exaly   +4 more sources

Effect of Green Additives in Copper Electrorefining Bath: Current Efficiency and Surface Characterization Investigation

Journal of Chemistry
The copper electrorefining performance in acidified copper sulfate solution utilizing the potential-dynamic polarization technique was established. This was inspected through measurement and comparison of limiting current-cathode potential relationship ...
F. M. A. Abouzeid, S. Alshammery
doaj   +3 more sources

Electrorefining of copper and anode passivation

Journal of MMIJ, 2020
In the process of electrorefining of copper, application of higher current density increases the tendency of anode passivation. The passivation disrupts the sound operation of the electrorefining process, reducing the current efficiency and the quality ...
Hideaki SASAKI, Yuma NINOMIYA, Toru H. OKABE   +2 more
doaj   +3 more sources

The Mechanism of Nodular Growth in Copper Electrorefining

Journal of MMIJ, 2020
The mechanism of nodulation in copper electrorefining process was investigated by experimental method and simulation, in particular as for its growth in height.
Ken ADACHI, Yuya NAKAI, Shohei MITSUNO, Masayuki MIYAMOTO, Atsushi KITADA, Kazuhiro FUKAMI, Kuniaki MURASE   +6 more
doaj   +3 more sources

Viscosity and density models for copper electrorefining electrolytes [PDF]

E3S Web of Conferences, 2016
Peer ...
Kalliomäki Taina, Aji Arif T., Aromaa Jari, Lundström Mari   +3 more
doaj   +3 more sources

Effect of Jet Flow between Electrodes on the Cathode Quality in Copper Electrorefining with High Current Density

Metals, 2018
Increasing current density is one of the main methods for improving the productivity of copper electrorefining. However, in the conventional bottom-inlet/top-outlet mode, an increase in current density leads to a deterioration of the surface quality of ...
Hongdan Wang, Qian Wang, Wentang Xia, Bingzhi Ren   +3 more
doaj   +3 more sources

Impact of 5-Amino-1H Tetrazole on Reducing Silver in Copper Cathodes during Electrorefining with High Silver Content Anode Plates

Metals
As the grade of the copper concentrate decreases and its composition becomes increasingly complex, the silver content in anode plates cast after fire refining increases, leading to a higher silver content in the copper cathode during electrorefining and ...
Chen Chen, Chu Cheng, Mengxin Wang, Haitao Liu, Xiaoheng Li, Kexing Song   +5 more
doaj   +3 more sources

The Effect of Arsenic on Copper Electrodeposition in Copper-Sulfate Solutions in Copper-Electrorefining [PDF]

Journal of the Korean Institute of Surface Engineering, 2009
The effect of Arsenic in copper-sulfate solutions during electrorefining of copper was investigated using scanning electron microscopy, X-ray diffraction and cyclic voltammetry analysis. Electrodeposition was carried out using Arsenic, Antimony and bismuth addition to sulfate electrolytes: 45 g/l and 170 g/l .
Do-Hyung Kim, Yong-Hwan Kim, Won-Sub Chung   +2 more
exaly   +2 more sources