Jan 01, 2017 Zhang et al. in Chinese patent CN 106011931 describe secondary lead electrorefining in a fluorosilicic acid with periodic anode washing to get rid of the anode film. Su et al. 44 refined lead in two stages with the first stage being fire refining to remove copper and tin and the second stage consists of electrorefining to remove all the other ...
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Jan 01, 2017 Zhang et al. in Chinese patent CN 106011931 describe secondary lead electrorefining in a fluorosilicic acid with periodic anode washing to get rid of the anode film. Su et al. 44 refined lead in two stages with the first stage being fire refining to remove copper and tin and the second stage consists of electrorefining to remove all the other ... The present invention relates to a method to electrolyze and refine gold through non-aqueous electrolysis, capable of manufacturing high purity gold by setting gold, containing impurities or gold alloy scrap as an anode and electrochemically dissolving the same in a non-aqueous solution forming an electrolytic cell having conductivity while at the same time returning the same to a cathode.Get Price
Zhang et al. 43 in Chinese patent CN 106011931 describe secondary lead electrorefining in a fluorosilicic acid with periodic anode washing to get rid of the anode film. Su et al. 44 refined lead in two stages with the first stage being fire refining to remove copper and tin and the second stage consists of electrorefining to remove all the ... A slag equivalent to 25% of the mass of the initial concentrate was produced during the recovery of the Sn. This contained 45% Nb 2 O 5 and Ta 2 O 5, adding extra value to the mine tailings. The tin metal ingot was purified by electrorefining involving a tin and H 2 SO 4 electrolyte solution and a 101.9 A/m 2 current applied for 148 h. Under ...Get Price
Ashour Owais,Mohamed Abdel-Hady Gepreel,Direct Electrorefining of Secondary Lead Slag An-ode Particles, World of Metallurgy ERZMETALL 66. 5, 2013.(impact factor Slag from the converter typically has a high copper concentration and can be returned to the smelting furnace for recovery of the copper. 2.5 Fire Refining (Anode Refining) Prior to final casting or electrorefining, impurities must be further removed from metals. This process is sometimes used in the production of copper in Canada.Get Price
As the anode slime containsa high proportion (50%) of solid tin particles, the anodic process may also be considered involving two consecutive steps. At higher potentials, Sn(IV) ions may be generated primarily, but as they diffuse through the slime layer, they get into contact with the tin particles and Sn(II) may finally arise by The anode slime generated as a by-product during the electrorefining of tin in hydrochloric acid solutions should be processed to recover the included tin, tin oxides and the alloying elements. The most frequently used lead-free soldering alloy contains significant amounts of silver and copper,Get Price
Process for directly and electrolytically refining used copper cable scrap comprises using anodes in the usual form in an electrolysis process and using the usual process parameters. The novelty is that the anodes are produced by pressing the copper cable granules containing plastic produced on crushing and classifying the scrap. TBRC is a rotary tiltable furnace for smelting anode slime,WEEE,non-ferrous metal smelting slag and setting slurry to recover gold, silver and other precious metal. It can also treat copper concentrate and secondary material like scrap copper, scrape lead, lead slag, lead dust,etc.Get Price
Recovery of gold and silver in secondary slag from gold refining process by co-precipitation with metal hydroxides. 2005. Romchat Chairaksa. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Download PDF. Aug 22, 2017 This cold material contains anode scrap returned from electrorefining, rejected anodes, copper-rich slag, and other rather pure materials. The excess heat in the converter also facilitates the breakdown of organic material, present, for example, in printed circuit boards and cable insulation 16 .Get Price
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. In the current paper, three possible contamination mechanismsparticle entrapment, electrolyte inclusions and co-electrodepositionwere investigated. Feb 28, 2016 This metallic lead in liquid state traps gold and silver. As slag and metallic charge have different densities, lead and precious metals go to the bottom of the crucible and the slag floats. In other words, lead reduces the losses of precious metals into the slag. The mixture of heat, fluxes, carbon and lead assure an appropriate reducing ...Get Price
12.3 Primary Copper Smelting 12.3.1 General1 Copper ore is produced in 13 states. In 1989, Arizona produced 60 percent of the total U. S. ore. Fourteen domestic mines accounted for more than 95 percent of the 1.45 megagrams (Mg) Jul 06, 2020 Converting of copper lead matte in a Peirce-Smith converter. Refining of lead bullion. Integration with anode slime plant. Integration with precious metal refinery. On the secondary copper side, one of the most successful expressions of an integrated recycling system has been the implementation of the Kayser Recycling System (KRS ). This ...Get Price
The principal unit smelting operations are (1) double-pass sintering to remove sulfur and simultaneously agglomerate fine-sized feed materials (2) blast furnace smelting of sinter with coke and fluxes to make a lead bullion containing most of the byproduct metal values, and a slag contain- ing most of the zinc and worthless gangue material (3 ... Jan 19, 2021 Thus, the recovery of most of the lead and part of the tin by liquation in a continuously operating cell seems possible. One hundred grams of anode residue was melted with a slag consisting of 10 grams of cryolite, 53.5 grams Na2CO3, and 10 grams SiO2 to remove aluminum zinc, and silicon. Air was blown through the melt for 30 minutes.Get Price
The side blowing furnace can be used for direct smelting of lead oxide/sulfide concentrate and lead-zinc sulfide ore as well as lead-bearing secondary material as lead paste from lead acid battery etc.. The process Lead oxidation, reduction and slag fuming, all can be performed by side blowing furnaces. Jul 08, 2020 Abstract Anode slime and tin precipitate as by-products of the electrorefining (ER) of non-standard anodes obtained after experimental smelting of waste electric and electronic equipment (e-waste), in addition to the base and precious metals, contains a significant amount of tin. Due to its presence as inert SnO2 hydrate ( metastannic acid) and its dissipation between slime and electrolyte ...Get Price
Recovery of gold and silver in secondary slag from gold refining process by co-precipitation with metal hydroxides. 2005. Romchat Chairaksa. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Download PDF. Feb 08, 2016 Antimony has become an increasingly critical element in recent years, due to a surge in industrial demand and the Chinese domination of primary production. Antimony is produced from stibnite ore (Sb2O3) which is processed into antimony metal and antimony oxide (Sb2O3). The industrial importance of antimony is mainly derived from its use as flame retardant in plastics, coatings, andGet Price
Jun 27, 2020 The lighter gangue particles are washed ... form a slag, which floated on the iron and was ... A thick block of impure metal is made anode. A thin strip of the pure metal is made cathode. A water soluble salt (of the metal to be refined) is taken as electrolyte. SECONDARY SOURCES OF METAL. Secondary sources of rare earth element In addition to the primary sources and leaving aside recycling of REE from end-of-life products as other source, tailings and other by-products from previous mining activities may also hold significant amounts of REE. Utilization of such materials may actually help not only to provide additional source of REE but also to ...Get Price
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