Recovery of Copper, Iron, and Sulfur from Chalcopyrite ...Smelting of copper concentrates results in the discharge of millions of tons of SO, to the atmosphere each year. Because of increasing concern with air pollution, the Bureau of Mines has developed a hydrometallurgical procedure to obtain elemental sulfur from chalcopyrite by means of the following reaction: CuFeS 2 + 3FeCl 3 > → CuCl + 4FeCl2 + 2S.
(PDF) The leaching of tetrahedrite in ferric chloride ...Effect of ferric concentration Most of the leaching solutions used in this work were 3 M in sodium chloride and so the metals in Fig. 5 shows the effect of ferric concentration on solution should be complexed with chloride ions. copper dissolution and the dependence of the rate on Ferric iron, for instance, is distributed between five this ...
Oxidative leaching of an offgrade/complex copper ...Laboratory studies have been conducted on chloride leaching as a possible route for the simultaneous recovery of copper, zinc, and lead from an off grade and complex chalcopyrite concentrate (from Sikkim, India) associated with appreciable amounts of sphalerite, galena, and pyrite. The effects of temperature, concentration, and quantity of ferric chloride, stirring speed, and leaching time on ...
Chloride Heap LeachingChalcopyrite is one of the most refractory copper sulphide minerals in relation to leaching in acidic ferric chloride and ferric sulphate systems at low temperature. This is exemplified by the mineral's slow leaching kinetics, which level off with time.
Ferric ion as a leaching medium (Journal Article) | The chlorine is used to regenerate ferric chloride in the leach solution. The study is being conducted in a process investigation unit which treats 750 lb of concentrate a day. This paper more » discusses the results of operation of the process investigation unit, data on lead monitoring, and the precautions employed to control lead levels in ...
Enhancing the kinetics of pyrite alyzed leaching of ...An investigation has been conducted into the kinetics of chalcopyrite leaching in acidic ferric/ferrous sulfate media at atmospheric pressure and low temperature in the presence of pyrite. It has been found that pyrite samples from different sources affect the rate of chalcopyrite leaching differently. Some pyrite samples accelerate the rate significantly while others have little or no ...
Ferric and Cupric Chloride Leaching of Valuable Metals ...For copper, the extractions were higher in chloride leaching (75 – 100 %) whereas cyanide could dissolve 50 % of copper. Extraction of nickel and zinc were slightly higher in ferric chloride leaching compared to cupric chloride leaching, but cobalt extraction was similar in both chloride leaching .
NIOSHTIC2 Publiions SearchAs a part of ongoing research into the sulfidation partitioning of selected complex minerals, the Bureau of Mines conducted research designed to selectively recover Cu from sulfidized chalcopyrite (CuFeS2). Ferric chloride (FeCl3) solutions leached >90 pct of the Cu and <20 pct (sometimes <10 pct) of the Fe in the sulfidized concentrates.
(PDF) Chalcopyrite concentrate leaching with biologically ...Differential bioleaching of copper by mesophilic and moderately thermophilic acidophilic consortium enriched from same copper mine water sample By Prof. Lala Behari Sukla Bacterial and chemical leaching of chalcopyrite concentrates as affected by the redox potential and ferric.
Recovery of elemental sulphur and copper values from ...The influence of different variables on the recovery of copper and sulphur from chalcopyrite concentrates by direct leaching in ferric chloride solution has been studied. It is found that the finer the grind of the concentrate and the higher the strength of ferric chloride in the solution, the higher is the recovery of copper and sulphur.
Cupric and Chloride Ions: Leaching of Chalcopyrite ...This makes the dissolution more beneficial in cupric chloride solutions compared to ferric chloride solutions [43,44,45]. It has also been revealed that the addition of cupric chloride to ferric chloride leaching helps chalcopyrite dissolution . The capability of chloride ions to form complexes is crucial.
USB2A process for recovering copper from chalcopyrite is disclosed. The process includes oxidising sulphur in chalcopyrite with a solution under predetermined contact conditions and thereby releasing at least part of the copper in the chalcopyrite into the solution as copper ions. The process includes a subsequent step of reducing sulphur in a solid product from step (a) to a minus two, ie ...
US Bureau of MinesFerric chloridebrine leaching of galena concentrate Price: . ... Effect of nonionic surfactants on chalcopyrite leaching under dump chemical conditions, part 2 ... RI9396 Copper exchange capacity of clays and their potential effect on in situ copper leaching Price: . RI9400 Recovery of manganese from steel plant slag by carbamate ...
NIOSHTIC2 Publiions SearchBecause of increasing concern with air pollution, the Bureau of Mines has developed a hydrometallurgical procedure to obtain elemental sulfur from chalcopyrite (cufes2) by means of the following reaction: cufes2 + 3fecl3 > cucl + 4fecl2 + 2s under optimum conditions, percent of the copper and percent of the iron were extracted in 2 hours from a typical mill concentrate containing 75 per
PDF Ferric Chloride Download Full – PDF Download BookEconomic Evaluation of a Process for Ferric Chloride Leaching of Chalcopyrite Concentrate Release on 1976 | by Thomas A. Phillips Stripped solution is removed from the anode compartment of the cell for processing in the ferric chloride regeneration section .
Characterization and Flotation of Sulfur from Chalcopyrite ...When amyl xanthate is used, 85% of chalcopyrite can be recovered with a copper grade of % in a singlestage froth flotation. The chalcopyrite flotation concentrate can .
A Review on Novel Techniques for Chalcopyrite Ore ProcessingJan 01, 2012 · AlHarahsheh (2008) used ferric chloride leaching of copper from chalcopyrite. The effect of stirring speed and temperature on chalcopyrite leaching were investigated. Agitation was found to have a negative effect on cupric ion, the fact that cupric complexes are formed during the leaching process where the cupric ion is considered as a string ...
Leaching of chalcopyrite with acidified ferric chloride ...Abstract Leaching characteristics of chalcopyrite concentrate from Cuba were investigated in acidified FeCl 3 and acidified FeCl 3 + CCl 4 . Carbon tetrachloride was used as solvent for the elemental sulfur produced during leaching. The tests shows higher extraction for copper in the presence of CCl 4 . Leaching in the absence of CCl 4 is a chemically controlled reaction with an apparent ...
A fundamental investigation into the microwave assisted ...In the ferric chloride system, however, it was found that cupric chloride, a reaction product of chalcopyrite with ferric sulphate, may play an important role in the dissolution process. Leaching of both chalcopyrite and sphalerite in ferric sulphate under microwave conditions has shown enhanced recoveries of metal values compared to that ...
Cupric Chloride Leaching of Chalcopyrite | SpringerLinkDec 11, 2014 · Jones and E. Peters, "The Leaching of Chalcopyrite with Ferric Sulphate and Ferric Chloride," in Extractive Metallurgy of Copper, Vol. II, edited by Yannopoulos and Agarwal, TMSAIME, 1976, p. 633–653. Google Scholar Download references
Pressure Leaching of Chalcopyrite Concentrate: Iron ...Autoclave oxidative leaching is one of the most promising hydrometallurgical approaches for copper suplhide materials processing. In previous studies [2–4], the possibility of an efficient autoclave treatment of chalcopyrite concentrate was confirmed. The concentrate has the following chemical composition, %: Cu, Zn, S, Fe, Pb, Ni, SiO2 [1].
Direct recovery of metals from sulphide ores by leaching ...Ferric chloride is provided as the leaching agent, with sufficient hydrochloric acid being present to prevent precipitation of metal hydroxides. Copper is dissolved from the concentrates by the action of ferric chloride in solution and the reaction, using chalcopyrite .
Ferric Chloride LeachingOct 15, 2018 · Ferric chloride leaching can be made selective, and more than 99 pct lead extraction can be obtained in 15 min. Additional leaching time increases solubilization of chalcopyrite and sphalerite. Because leaching and filtration were performed batchwise in the experimental unit, the contact time between solution and concentrate was at least 30 min ...
Reducing Ferric Ions in Acidic Electrolytes by Copper ...Jan 01, 2019 · Copper powder generated during the treatment of electrometallurgical bleeds by reactive electro dialysis (RED) had totally reduced the content of ferric ions in acidic synthetic electrolytes (Cu (II) Fe (III) – H2SO4). In batch and columnar experiments of the ferric ions were reduced to ferrous ions with an extremely high kinetics.
Atmospheric oxidative and nonoxidative leaching of NiCu ...The atmospheric leaching of copperbearing matte by acidic ferric chloride solution was studied at the laboratory scale. The aim was to achieve maximum copper and nickel recovery by investigating the mechanisms of leaching, as well as identifying the effect of temperature, and concentration of ferric chloride and oxygen.
Kinetic Study of Chalcopyrite Leaching with Iron (III ...For the final reaction 16 mol of ferric chloride are necessary for an entire oxidation of one mol of chalcopyrite, this means that for 1 gr of chalcopyrite g of FeCl 3 are required, nevertheless due to the final products of the leaching process in the present and other previous studies (Majima, Awakura et al. 1985, Havlík, Škrobian et ...
CACA heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride or mixed chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.
USB2A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.
(PDF) Leaching of chalcopyrite with ferric ion. Part II ...Leaching of chalcopyrite with ferric ion. Part II: Effect of redox potential. Antonio Ballester. Related Papers. Leaching of chalcopyrite with ferric ion. Part I: General aspects ... THE KINETICS OF THE DISSOLUTION OF CHALCOPYRITE IN CHLORIDE MEDIA Lilian De Lourdes Velásquez Yévenes Metallurgical Engineer.
Study of integrated leaching and electrowinning of copper ...Results showed that high hydrochloric acid and cupric ion concentration assisted leaching; on the other hand, electrowinning of copper from chalcopyrite ore leaching solution using chloride media is much feasible when acid and cupric ion concentrations are low ( M/l and M/l, respectively).
Oxygenated Leaching of Copper Sulfide Mineral under ...W. Ding; "Leaching behavior of complex copper sulfide concentration with ferric chloride by microwave irradiation"; Rare Metals, 16 [2] 152155 (1997). R. Padilla, D. Lovera and Ruiz; "Leaching of chalcopyrite in CuCl2NaClO2 system"; EPD Congress 1997, 167177 (1997).
