ferric chloride leaching of copper from chalcopyrite
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ferric chloride leaching of copper from chalcopyrite
ferric chloride leaching of copper from chalcopyrite. Chemical leaching of chalcopyrite with ferric ion The leaching of copper from sulphide ore bodies occurs naturally, releasing copper and iron. In ancient times, copper was recovered by cementation with metal iron and iron in the form of ferrous sulphate by evaporation of the solution.
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Ferric chloride leaching of chalcopyrite: Synergetic ...
In order to leach chalcopyrite and chalcocite under atmospheric or high pressure leaching conditions in sulfate or chloride medium, ferric and copper ions, bacteria, oxygen and other oxidizers can ...
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Leaching of chalcopyrite with ferric ion. Part I: General ...
Aug 01, 2008 Sullivan concluded that ferric chloride is a better chalcopyrite leaching agent than ferric sulphate and that the effect was more marked at high temperatures. Dutrizac et al. (1969) found that, in a temperature range between 50 and 100 °C, the chalcopyrite leaching rate was linear in chloride medium and parabolic in sulphate medium.
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LEACHING OF COPPER CONCENTRATES
and sulfate ions, Ferric ion results from the acidic leaching of any iron-containing material. It may be a minor problem, as in leaching high grade chalcocite, or a very major problem, as in leaching chalcopyrite. While ferric ion is not a major problem in basic leaching, the inability of
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The Leaching of Chalcopyrite in Ferric Chloride and Ferric ...
Jul 18, 2013 Ferric chloride is a more effective reagent and this is attributable to the morphological characteristics of chalcopyrite leaching. The kinetics with both leachant solutions were found to be linear over an extended period, followed by an acceleration stage, as a
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The development of an effective technology for heap ...
Figure 3. The effect of temperature on chalcopyrite leaching in ferric chloride over leaching time (mins) (Al-Harasheh, et al., 2008). ..... 12 Figure 4. Chalcopyrite dissolution of four different variaties at pH 1 (solid) and pH 1.5
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Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous ...
Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in columns loaded with approximately 50 kg of agglomerated ore; the ...
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Leaching of Copper Sulphides - SAIMM
POX in a copper heap leach circuit. Figure 2. Simplified ferric leaching flowsheet. Figure 3. Copper chloride leach process. Leaching Chemistry As outlined earlier, the leaching chemistry that takes place within a total POX autoclave is very complex and will vary from case to case according to the mineralogy of the concentrate fed to the
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US8070851B2 - Chloride heap leaching - Google Patents
A 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.
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ferric chloride leaching of copper from chalcopyrite
ferric chloride leaching of copper from chalcopyrite. Chemical leaching of chalcopyrite with ferric ion The leaching of copper from sulphide ore bodies occurs naturally, releasing copper and iron. In ancient times, copper was recovered by cementation with metal iron and iron in the form of ferrous sulphate by evaporation of the solution.
Read More
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(PDF) Leaching of chalcopyrite with ferric ion. Part I ...
Chronologically, Traill and McClelland (1926) were the first to Dutrizac (1989) established that during chalcopyrite leaching with study the dissolution of chalcopyrite with concentrated ferric chloride ferric sulphate at 95 °C the sulphide sulphur was practically all oxidized (70 g/L) at high temperature (95 °C); they obtained a copper ...
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LEACHING OF COPPER CONCENTRATES
and sulfate ions, Ferric ion results from the acidic leaching of any iron-containing material. It may be a minor problem, as in leaching high grade chalcocite, or a very major problem, as in leaching chalcopyrite. While ferric ion is not a major problem in basic leaching, the inability of
Read More
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The Leaching of Chalcopyrite in Ferric Chloride and Ferric ...
Jul 18, 2013 Ferric chloride is a more effective reagent and this is attributable to the morphological characteristics of chalcopyrite leaching. The kinetics with both leachant solutions were found to be linear over an extended period, followed by an acceleration stage, as a
Read More
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A review of chloride assisted copper sulfide leaching by ...
2007). Elemental sulfur formed during the leaching of chalcopyrite with ferric chloride is also more porous than that formed with ferric sulfate, thus the leaching rate is an order of magnitude larger in the former (Majima et al., 1985). Peters (1976a) reported that chalcopyrite, the
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Cupric and Chloride Ions: Leaching of Chalcopyrite ...
This makes the dissolution more beneficial in cupric chloride solutions compared to ferric chloride solutions [43–45]. It has also been revealed that the addition of cupric chloride to ferric chloride leaching helps chalcopyrite dissolution [46]. The capability of chloride
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Chloride leaching for chalcopyrite - UBC Library Open ...
Title: Chloride leaching for chalcopyrite: Creator: Liddicoat, Jenni Anne: Publisher: University of British Columbia: Date Issued: 2003: Description: Two new process flowsheets have been developed which combine chloride leaching for chalcopyrite with solvent extraction, to selectively transfer copper to a conventional sulfate electrowinning circuit.
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The leaching of chalcopyrite with ferric chloride ...
A comparative study of electrochemical leaching and chemical leaching of chalcopyrite was done to elucidate the leaching mechanism of chalcopyrite with FeCl3. The leaching rate of chalcopyrite exhibits a half order dependency on the FeCl3 concentration, whereas it is independent of the FeCl2 concentration. The mixed potential of chalcopyrite exhibits a 72 mV decade−1 dependency upon
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The development of an effective technology for heap ...
Figure 3. The effect of temperature on chalcopyrite leaching in ferric chloride over leaching time (mins) (Al-Harasheh, et al., 2008). ..... 12 Figure 4. Chalcopyrite dissolution of four different variaties at pH 1 (solid) and pH 1.5
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CA2651516C - Chloride heap leaching - Google Patents
A 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.
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Chloride heap leaching - BHP Billiton SA Limited
The invention claimed is: 1. A hydrometallurgical method of recovering copper from a material, in a heap, that contains a copper sulphide mineral which contains at least chalcopyrite comprising leaching the material in an acidic chloride solution or a mixed chloride/sulphate solution in the presence of dissolved oxygen and maintaining the mineral's surface potential within a range of 550 mV ...
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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 hydro-metallurgical procedure to obtain elemental sulfur from chalcopyrite by means of the following reaction: CuFeS 2 + 3FeCl 3 > → CuCl + 4FeCl2 + 2S.
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Leaching of chalcopyrite in cupric chloride solution
In general, the leaching of chalcopyrite is more effective in chloride solutions with cupric ions as the oxidant than in sulfate solutions with ferric ions as the oxidant. This is possibly due to kinetic rather than thermodynamic considerations e.g. the higher rates of electron transfer in chloride
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Solvometallurgical process for extraction of copper from ...
leaching of chalcopyrite. The most often used lixiviants are acidic chloride media, acidic sulfate media and basic ammonia solutions, together with various oxidizing agents.3–7 The most often used oxidizing agents are oxygen, ferric sulfate, ferric chloride or cupric chloride.8–13 Various other oxi-
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(PDF) Leaching of chalcopyrite with ferric ion. Part I ...
Chronologically, Traill and McClelland (1926) were the first to Dutrizac (1989) established that during chalcopyrite leaching with study the dissolution of chalcopyrite with concentrated ferric chloride ferric sulphate at 95 °C the sulphide sulphur was practically all oxidized (70 g/L) at high temperature (95 °C); they obtained a copper ...
Read More
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LEACHING OF COPPER CONCENTRATES
and sulfate ions, Ferric ion results from the acidic leaching of any iron-containing material. It may be a minor problem, as in leaching high grade chalcocite, or a very major problem, as in leaching chalcopyrite. While ferric ion is not a major problem in basic leaching, the inability of
Read More
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A review of chloride assisted copper sulfide leaching by ...
2007). Elemental sulfur formed during the leaching of chalcopyrite with ferric chloride is also more porous than that formed with ferric sulfate, thus the leaching rate is an order of magnitude larger in the former (Majima et al., 1985). Peters (1976a) reported that chalcopyrite, the
Read More
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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 hydro-metallurgical procedure to obtain elemental sulfur from chalcopyrite by means of the following reaction: CuFeS 2 + 3FeCl 3 > → CuCl + 4FeCl2 + 2S.
Read More
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COPPER HYDROMETALLURGY AND EXTRACTION FROM
Chloride and its compounds, including metal chlorides, are effective oxidants. Ferric chloride and cupric chloride oxidise many materials rapidly and can be generated readily by electrolysis or oxidation with chlorine. For rapid and complete leaching of copper sulphides, and chalcopyrite in particular, strong oxidising conditions are necessary.
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The development of an effective technology for heap ...
Figure 3. The effect of temperature on chalcopyrite leaching in ferric chloride over leaching time (mins) (Al-Harasheh, et al., 2008). ..... 12 Figure 4. Chalcopyrite dissolution of four different variaties at pH 1 (solid) and pH 1.5
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Chalcopyrite Leaching in Acidic Chloride Solution without ...
Abstract: Chalcopyrite leaching in acidic chloride solution with-out sulphates. The effect of dissolved oxygen and ferrous/ferric/cu-pric ions in solution on the leaching behavior of chalcopyrite and the phenomenology of the passivating layer formation on the chalcopyrite surface in an aqueous acidic chlorinated medium with dissolved oxy-
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CA2651516C - Chloride heap leaching - Google Patents
A 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.
Read More
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Solvometallurgical process for extraction of copper from ...
In sulfate media, the leaching kinetics are generally slow (several months) and the leaching of copper is difficult to be complete, due to the formation of passivation layers on the surface of chalcopyrite, such as solid sulfur and iron precipitate (e.g. jarosite). 1 In chloride media, the leaching
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NIOSHTIC-2 Publications Search - 10007586 - Improvements ...
A method to recover copper and elemental sulfur from chalcopyrite concentrate, using a ferric chloride leach, cufes2 + 3fecl3 -> cucl + 4fecl2 + 2s, was reported by the federal Bureau of Mines in 1971 (report of investigations 7474). Additional work has been done to improve the recovery of sulfur from the leach residue, the recovery of copper and iron from the leach solution, and the regeneration
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ELECTRO-HYDROMETALLURGY OF CIULCOYYRITES AN
ferric chloride solutions. Nagaraj Vasu 1201 initiated work in India and they tested the Chitradurga chalcopyrite concentrates. Easu et al [17] have also presented a systematic study on the leaching of chalcopyrite in ferric chloride. The leaching conditions for obtaining recovery of over 95% may be sum- marid as follows:
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Recover Copper by Leaching Sulfidation-Partitioned ...
Ferric Chloride Leaching. Because of the demonstrated efficacy of FeCl3 as a leachant for CuFeS2, the most stable of the copper sulfides (because of its face-centered tetragonal structure), FeCl3 was a likely candidate to selectively remove Cu from the
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