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During the electrolysis process pure copper is deposited on cathode plates and impurities which are soluble fall to the bottom of the cell as anode slimes or sludge. Precious metals Ag, Pt, Pd, can be extracted from the anode sludge created by the electro-refining process. Copper concentrates can also contain precious metals like gold and silver.
Jul 18, 2013 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
The hydrometallurgical processing of copper anode slimes has the advantages such as costs are relatively low when compared to those for a smelter, process
equipment may be designed and installed in modules. In this investigation sulphuric acid pressure leaching was chosen from various hydrometallurgical methods to process the copper-anode slimes for extraction of copper. The decopperized slimes are then enriched in
Apr 24, 2014 The general process for the hydrometallurgical treatment of anode slimes is described by J. E. Hoffmann and K. E. Sutliff in their paper entitled Hydrometallurgical Processing of Kennecott Refinery Slimes, ibid. Electrolytic refinery slimes, i.e., anode slimes, usually contain between 10 and 40 elemental copper. Since copper can complicate ...
Electrolysis process deposits pure copper 99.99 on the stainless steel cathode plates. The impurities and precious metals contained in anodes settle down as anode slimes. Cathodes are then automatically washed, stripped and packed. The material handling equipment
Chloride leaching of anode slimes is generally considered as being the preferred method of gold extraction from anode slimes. After leaching, gold is recovered from the gold- and copper-bearing solution by solvent extraction SX using a petroleum-based extractant, often diluted in a petroleum-based solvent.
This article describes KUCs slimes process improvements, in particular wet chlorination for gold leaching. Kennecott Copper Anode Slimes Process The KUC refinery is located at Magna, approximately 16 miles west of Salt Lake City, Utah, USA. In the refinerys tank house, commercial anodes from the KUC smelter are electrorefined.
The refined blister copper is poured into casting molds lined up side by side on the revolving circular table of a casting wheel and cast into anode plates for electrolytic refining. The anode plates are approximately 1m x 1m x 0.05m in size, and weigh 380 kg per plate.
Copper telluride is a sort of solid waste generated from copper anode slime processing, from which the recovery of copper and particularly the high-value element of tellurium always encounter technical difficulties due to the complex physicochemical properties of tellurium. In this study, an efficient and compact process for copper telluride ...
Copper electro-refining Cu-ER is the principal method for producing 70 of high or 99.97 pure copper cathodes from 97-99 pure blisterfire refined-scrap copper anodes. While the inert and most of less soluble impurities settle as anode slimesludge, other soluble impurities, particularly the metalloids group VA15 elements or Q As, Sb and Bi and some transition
The processing of copper anode slimes is an additional economic driver for copper electrorefineries, due to the fact that slimes contain precious metals such as silver, gold and platinum group metals PGMs e.g. Pt and Pd as well as base metals like copper, nickel, selenium, tellurium and impurity elements such as lead, antimony and bismuth.
There are numerous viable approaches to the treatment of anode slimes from electrolytic copper refining. Of particular interest in the treatment of slimes are the behavior and recovery of selenium. The understanding of the process chemistry involved in the treatment of anode slimes should be aided considerably by recent work on the formation and characterization of slimes.
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Copper processing - Copper processing - Roasting, smelting, and converting Once a concentrate has been produced containing copper and other metals of value such as gold and silver, the next step is to remove impurity elements. In older processes the concentrate, containing between 5 and 10 percent water, is first roasted in a cylindrical, refractory-lined
in Anode Slimes produced during Copper Electrorefining Recycling PM Scrap to DORE Metal Tellurium occurrence in Precious Metals Operations Tellurium is an impurity during Precious Metals Processing
Processing of copper anode-slimes for extraction of metal values154 . Hydrometallurgical processing of copper anode slimes has the following advantages capital costs are relatively low when compared to those for a smelter, process may be applied to small and large operations, air pollution by sulfur dioxide is eliminated, equipment may be designed and installed in...
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Elemental copper in slimes arises from two sources fragments ofthe anode which are dislodged during the refining process and report in the slimes, and cuprous oxide present in the anode which reacts with sulfuric acid in refining electrolyte dis proportionating to form cupric sulfate and finely divided copper powder, which reports in 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 the pyrometallurgical processing of copper sulphides such as chalcopyrite ...
The refining anodes taken out from the refining furnace is changed into electrolytic copper with purity of 99.99 through an electrolysis process During electrolysis, copper II ions leave the impure copper anode and since they are positive, migrating to the negative cathode.
The primary role of the anode scrap washing machine is to remove the slime and sulfuric acid from the surfaces of scrap anodes using a three-stage washing method. Water and energy consumption are minimized by circulating hot water through the wash-water tanks. The automatic slime-handling system collects and removes slime from the system.
recovery of copper and gold from anode slime by solvent extraction and leaching. This process has to be carried out at the optimum operating conditions, and also economically, for possible scale-up. 268542-19239,8671 The copper anode slime of Sarcheshmeh Copper Complex was used in this study, and the reagents sulphuric acid 88,
A study of commercial copper refinery anode slimes has been conducted to evaluate the separation of valuable metals contained in the slimes. The slimes contain substantial quantities of Ag, Sn, Au, Pb, and Cu. The values were present principally as AgCl, SnO2, Au, PbSO4, Cu and CuSO4. A Roast-Leach-Roast-Leach RLRL technique solubilized up to 91 pct of the Ag
In pyrometallurgical process steps, all the noble metals will dissolve into matte, black copper, blister copper, and anode copper. During electrolysis, the noble metals end up in anode slime from where they can be recovered by pyrometallurgical and electrolytic methods.
Jun 01, 2013 Through implementing multiple-step Six Sigma tools in processing of the copper anode slimes and the technology development of in-line, intelligent ORP measurement in the wet chlorination operation, the refinery has enhanced its productivity, produces higher quality copper, gold and other metals, and increased its profitability.
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