Concentrating and Dissolving Platinum Group Metals …
Copper anode slime is a byproduct in electrorefining of blister. PGMs in autocatalyst were concentrated by pyrometallurgy and were transformed into copper anode slime by electrorefining process. General, pretreatment, concentration and refining are three conventional process for the treatment of copper anode slime [20].
Investigations on Anode Quality in Copper Electrorefining
Copper anodes have to have a certain quality in order to meet the requirements of subsequent electrorefining. The anode casting process is decisive for anode quality, which determines anodic dissolution behaviour during electrorefining. In order to determine the influences of the casting process and cooling conditions on chemical and physical anode quality, the anode casting …
An environmentally friendly process to selectively recover …
Copper anode slime is the byproduct of electro-refining of copper, which often contains precious metals and is a valuable secondary resource for recovering valuable products, such as silver, from it (Ding et al., 2017, Wang et al., 2017, Yldrm et al., 2014).The predominant method for silver recovery from anode slime is pyrometallurgy, which usually involves a series …
PROCESSING OF COPPER ANODE-SLIMES FOR …
Anode slime samples were collected from the bottom of the electrolytic cells during the electro-refining of copper. These samples were sieved through a 2.0 mm sieve to remove large inclusions of copper and other foreign material present in the slime. A representative sample of the feed slime was analysed for Cu, Pb, Sn, Zn, Ni, Fe,
Effect of thermal treatment of copper anodes on electrorefining process …
Photos of the copper anodes after electrorefining process (a) with slime layer (b) after washing of slime layer. 2.2. ... This can also lead to decrease slime amount on the anode surface and prolong the passivation time (Ahan et al., 2005, Filzwieser et al., 2012).
Studies of Anode Slime Sintering/Coalescence and Its Effects on Anode
When the anode is exposed to the electrolytic solution during the process of copper electrorefining, less noble impurity elements in solid solution in the copper matrix are dissolved into the electrolyte, but most inclusion phases at the copper grain boundaries are insoluble and become exposed to the solution, forming an anode slimes layer ...
Electrorefining Process of the Non-Commercial Copper Anodes …
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 ...
Processing of copper electrorefining anode slime: a review
Mentioning: 31 - Anode slime is the insoluble product deposited at the bottom of the electrorefining tank during electrorefining of copper. It generally contains Cu, Ni, Se, Te, Ag, Au, platinum group metals (PGM), Pb, Ba, Fe, etc. Owing to the presence of valuable metals and metalloids in the anode slime, numerous approaches have been made by the researchers to extract them …
PROCESSING OF COPPER ANODE-SLIMES FOR …
Processing of anodic slimes from an Egyptian copper electrorefining plant, exhibiting high contents of copper, lead, tin and silver has been presented. The proposed hydrometallurgical …
Metallurgical Process for Total Recovery of All Constituent
Copper anode slimes, the by-product of the copper electrorefining process, have been the subject of extensive investigation for recovering precious metals viz., Au, Ag, Pt and …
(PDF) Pressure Leaching of Copper-Free Anode Slimes
Metals and Materials International, 2020. Copper anode slimes, the by-product of the copper electrorefining process, have been the subject of extensive investigation for recovering precious metals viz., Au, Ag, Pt and Pd, in addition to being the main source of rare/energy-critical elements such as Se and Te.
Migration regularity and control of silver inclusions during copper …
Experimental studies of the effects of anode composition and process parameters on anode slime adhesion and cathode copper purity by performing copper electrorefining in a pilot-scale cell [J] Metallurgical and Materials Transactions B, 47 ( 5 ) ( 2016 ), pp. 3178 - 3191
ANODE SLIME GAINED DURING ELECTROLYTIC …
PROCESS OF SECONDARY COPPER ANODES . Nurten Deva 1, Musa Rizaj, Ismail Duman2, Florian Kongoli3 . ... electro-refining process the anode slime has been gained as secondary product. The experimental
Detailed characterisation of precious metals and critical …
The electrorefining process operates on a ten-day cathode, twenty-day anode cycle and involves dissolution of impure copper anodes (each 365 kg in weight, in batches of 56 anodes) into an electrolyte (CuSO 4-H 2 SO 4-H 2 O; ∼45 gpl Cu, 170 gpl H 2 SO 4, 63 °C) by applying an electrical current (28,000 A; 0.3 V) between the anode and a ...
EXTRACTION OF GOLD, SILVER AND COPPER FROM THE …
The anode slime is collected in the bottom of the electrolytic cells during the copper electrorefining. This slime generated during the copper refining process contains, among other base metals, costly precious metals. As previously mentioned, the blister copper, from
Extraction of gold, silver and copper from the copper electrorefining
Copper electro-refining (Cu-ER) is the principal method for producing >70% of high or 99.97% pure copper cathodes from 97-99% pure blister/fire refined-scrap copper anodes.
Chapter 7
7.2.1 Technological scheme of copper electrorefining The process of copper electrorefining is schematically illustrated in Fig 7.3. Anodes of 99 – 99.5 % pure copper obtained, by pyrometallurgical treatment, are prepared by casting after melting in the anode furnace. The surface area of the anode depending on the capacity of the electrolytic ...
Effect of thermal treatment of copper anodes on electrorefining process
2010. This article presents the results of a three year research project funded by the "Sponsor Group Copper Electrorefining". Investigated were passivation behaviour, anode dissolution, anode sludge formation and distribution coefficients of impure copper anodes with linear independent target contents of Sb, As, Bi and O processed at three current densities.
Alternatives for copper anode slime processing: A review
Copper anode slime (CAS) is a valuable mining waste due to its critical metal content. ... Schlesinger et al. (2013) state that during the copper electrorefining process, impurities in the anode can partition between the sludge formed at the bottom of the electrolyte and the dissolved ions in the electrolyte. Some impurities may directly ...
Processing of copper electrorefining anode slime: a review
Anode slime is the insoluble product deposited at the bottom of the electrorefining tank during electrorefining of copper. It generally contains Cu, Ni, Se, Te, Ag, Au, platinum group metals (PGM),...
Processing of copper electrorefining anode slime: a review
This paper proposes a thermodynamic-based design to estimate the exergy quantity and losses during the recycling of copper and other valuable metals out of electronic waste (e-waste) …
Recovery of scattered and precious metals from copper anode slime …
Because of the addition of copper sludge, copper cables, waste printed circuit boards, and other types of recycled copper to the copper smelting process, the anode slime is rich in tin (Sn), manganese (Mn), arsenic (As), lead (Pb), and other heavy metals, causes the composition of anode slime to fluctuate greatly (Li et al., 2020; Markovic et ...
ANODE SLIME GAINED DURING ELECTROLYTIC REFINING PROCESS OF SECONDARY
As a result of the electro-refining process the anode slime has been gained as secondary product. ... and thiourea as green solvent to recover the gold from anode copper slime in an ...
Selective Separation and Recovery of Tellurium from Copper Anode Slime …
Copper anode slime is a precious by-product formed during the copper electrorefining process [1,2,3,4].In order to prepare high pure copper, crud anodes are dissolved electrochemically and then deposited at the cathode.
Integrated process for recycling copper anode slime from electronic
During copper electro-refining process, cathode copper is obtained, and the insoluble impurities such as gold, silver, lead, tin, and antimony are deposited on anode, known as anode slime (Ghodrat et al., 2016). For a long time, extensive studies have been carried out on the recycling of anode slimes (Hait et al., 2009). Precious metals ...
Tellurium, from Copper Anode Slime to High Purity …
Copper anode slime is a precious by-product formed during the copper electrorefining process [1] [2][3][4]. In order to prepare high pure copper, crud anodes are dissolved electrochemically and ...
Anode slime behaviour in a laboratory-scale copper …
Combining conventional electrochemical measurements, laser-based visualization and digital image processing, the movement of anode slime, its spatial distribution and path of falling …
Electrorefining Process of the Non-Commercial …
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.% …
Copper Anode Slime Recovery-Copper-
Anode slime is a byproduct from copper or lead electro-refining process. The copper/lead anode slime usually contain As, Sb, Bi and precious metals like gold and silver. Smelter of anode slime is most likely divided into two groups by the …
A study of anodic slime behaviour in the electrorefining of …
Laser-based illumination and digital image processing of videotaped records of slime movement, combined with current/time monitoring and polarization experiments, provide …