A hydrometallurgical process for the treatment of a copper-electrolysis anode sludge raw material which contains silver, lead and copper, and additionally one or more constituents selected from the group consisting of Au, platinum-group metals, Se, Te, Sb, Sn, As, Bi, Ni, Zn and Fe, sulfate ion, chloride ion and silica, comprising the steps of:
This method is a hydrometallurgical alternative to chalcopyrite smelter technology and eliminates sulfur dioxide emission problems with its associated costs. Batch testing at 900 C with the chalcopyrite-ferric sulfate system resulted in copper extraction exceeding 99 pct. At an optimal energy consumption of 1,520 kW· hjst, 95 pct of the copper
The project investigated hydrometallurgical options for recovery of copper in flotation tailings, that would be sent to the tailings dam from a copper processing circuit. Precipitated copper oxide products generated from the piloted leach process are to be blended back into the primary copper concentrate generated by the flotation plant.
Paper [11] describes the recovery of copper from galvanic sludge by hydrometallurgical method. The process comprises leaching of sludge in 0.5 M H 2 SO 4,
Hydrometallurgy is a technique within the field of extractive metallurgy, the obtaining of metals from their ores.Hydrometallurgy involve the use of aqueous solutions for the recovery of metals from ores, concentrates, and recycled or residual materials. Processing techniques that complement hydrometallurgy are pyrometallurgy, vapour metallurgy, and molten salt electrometallurgy.
Jan 31, 2017· In recent years, the principle and theory behind solvent extraction has gained wide acceptance as one of the new tools of modern hydro-metallurgy. With the growing demand for metals of ever higher purity, the increasing use of unusual metals, and the necessity for treating ores of lower grade and greater complexity, solvent extraction has joined the ranks of other accepted recovery methods …
May 12, 2021· The Chemical of Africa (CHEMAF) is a hydrometallurgical plant that was commissioned in 2001. It produces copper (Cu) cathodes and salts of cobalt (Co) using a process encompassing the sulphuric acid leaching of Cu-Co oxidised ores under reducing conditions (Na2S2O5 or SO2) followed by the leach liquor purification by solvent extraction (SX), electrowinning of copper and the precipitation …
A hydrometallurgical process is provided for the recovery of tellurium as elemental tellurium powder from copper refinery anode slime containing high amount of lead. The process involves the removal of copper and lead from anode slime followed by the recovery of tellurium as elemental powders. An economical and environment friendly process is provided for producing tellurium from a high lead ...
The main goal of the study performed in this paper is the improvement of disposal and processing of technogenic wastes with high nonferrous metals content. In particular, the peculiarities of the copper recovery process from technogenic raw materials
Nov 13, 2020· Abstract The state of the art for the recovery of metals from steel industry by-products using hydrometallurgical processes is reviewed. The steel by-products are different slags, dusts, and sludges from a blast furnace (BF), basic oxygen furnace (BOF), electric arc furnace (EAF), and sinter plant, as well as oily mill scale and pickling sludge. The review highlights that dusts and sludges are ...
A hydrometallurgical process for the recovery of silver, selenium and tellurium from the anode slime produced in the electrolytic refining of copper or lead or from other raw materials bearing these metals, wherein the raw material and concentrated sulfuric acid or oleum are heated at approx. 160°-300° C, preferably 160°-200° C, in order to sulfate the nickel and the possible copper.
An improved hydrometallurgical process for the recovery of metallic copper, elemental sulfur, compounds of molybdenum and other valuable materials from copper sulfide ore …
ticularly copper slow down . It can be further noticed that although the copper recovery (56%) has not improved much compared to the atmospheric leaching (55%), there is a remarkable improvement in the tellurium recovery (about 68%) in the pressure leaching for 4 h. However, copper recovery has not improved to 0 I 2 3 4 TIME (Hrs.) ' 5
A novel hydrometallurgical process was proposed for selective recovery of Cu, Ag, Au and Pd from waste printed circuit boards (PCBs). More than 99% of copper content was dissolved by using two consecutive sulfuric acid leaching steps in the presence of H2O2 as oxidizing agents. The solid residue of …
Hydrometallurgical copper recovery can be conveniently considered in two stages: the leaching stage, in which the various forms of copper in the ore are placed into an aqueous solution, and the recovery stage, where dissolved copper is recovered as solid, nearly pure copper metal ready for
Dec 11, 2019· The hydrometallurgical smelter dust treatment process normally requires leaching, arsenic precipitation, and copper recovery. Valuable metals recovery takes place using mechanisms such as precipitation, electrowinning, or crystallizing, with impurity metals precipitated and directed to the tailings pond or waste area.
May 06, 2020· A strategy for the efficient recovery of highly pure copper and antimony metals from electronic waste (e-waste) was implemented by the combination of hydrometallurgical and electrochemical processes.
If one now deals with Copper (Cu) and antimony (Sb), that can berecovered from e-waste (RAM memory and integrated chips circuits, their recovery involves a leaching step in a solution of 0.5 mol dm −3 hydrochloric acid (HCl) and 0.074 mol dm −3 ferric chloride (FeCl 3) at a 1:10 solid/liquid (w / v) ratio followed by an electrodeposition in ...
A strategy for the efficient recovery of highly pure copper and antimony metals from electronic waste (e-waste) was implemented by the combination of hydrometallurgical and electrochemical processes.
The invention relates to a hydrometallurgical process for the treatment of polymetallic minerals and sulphur concentrates of copper and zinc, and by-products from lead smelting plants and zinc plants, treated independently and/or as mixtures with relevant contents of lead, copper, zinc, iron, gold and silver, such as the matte-speiss mixture from lead smelting plants, and copper cements from ...
Sep 08, 2020· 23.3: Hydrometallurgy. Hydrometallurgy involves the use of aqueous chemistry for the recovery of metals from ores, concentrates, and recycled or residual materials.This process is used in extraction of less electro positive or less reactive metals like gold and silver. Hydrometallurgy is typically divided into three general areas: (1) Leaching ...
Hydrometallurgical Recovery of Metals From E-waste ... simple recovery of copper or iron from various ores and other sources using hydrochloric acid. This has proven to be promising for the simple recovery of gold (99.2% recovered) with a combination of hydrochloric acid and nitric
The results revealed that the extraction percentages of zinc and copper were 88.37% and 90.85%, respectively, at a leaching temperature of 95 °C, reaction time of 90 min, and liquid–solid ratio of 8:1 mL/g. Further, effects of the current density, temperature, and reaction time on the recovery ratio of copper by ECS method were examined.
Nov 01, 2020· Process flowsheet of hydrometallurgical recovery of copper and zinc from smelting slag. The leaching rate R of zinc and copper is defined as. (1) R = cV / m ω where c, V, m, and ω are the zinc or copper concentration in the filtrate, the filtrate volume, mass of the smelting slag, and zinc or copper content of the smelting slag, respectively.
Jan 01, 2009· Recovery of copper and cobaltCopper and cobalt were recovered from the slimes and ammoniacal electrolytes. The slime (obtained in 8 h measurements) was leached threefold with the ammonia–ammonium chloride solution to deplete it in copper and cobalt. Solid residues were dissolved in 2.5 M HCl to determine their chemical composition.
A hydrometallurgical process for treating copper feed materials containing gold and/or silver by simultaneously leaching copper, gold and/or silver into an aqueous cyanide solution, recovering copper in metallic form by electrowinning and regenerating cyanide ions is provided, wherein high current efficiencies are achieved at high current densities and at low copper concentrations.
A hydrometallurgical process for the separate recovery of non-ferrous, ferrous, and precious metal values and sulfur from metal sulfide ore concentrates by leaching of metal sulfides with a lixiviant containing ferric chloride, cupric chloride and chlorine, precipitating cuprous chloride from the leach solution with butadiene, separating and decomposing the formed addition compound to recover ...
Jan 01, 2019· This paper summarizes the hydrometallurgical technologies for precious metals recovery such as chlorine leaching of copper anode slime for silver recovery, solvent extraction (SX) for gold recovery, and ion exchange (IX) for PGMs recovery. It also presents a …