increase the copper extractions.37–40 Methanesulfonic acid, an organic acid was used as an alternative for mineral acid for extraction of copper from chalcopyrite.41,42 However, these systems were in general water-rich processes. In this paper, we describe a green solvometallurgical process for the extraction of copper from sulfidic ore minerals,
Copper, an essential metal for the energy transition, is primarily obtained from chalcopyrite through hydrometallurgical and pyrometallurgical methods. The risks and harmful impacts of these processes pose significant concerns for environmental and human safety, highlighting the need for more efficient and eco-friendly hydrometallurgical methods. This …
The transition to renewable energy infrastructure necessitates rapid growth in copper production, averaging at least 3.5% annually to 2050. The current smelting–converting–electrorefining route must be revisited considering these future prospects as ore grades deplete and the costs to mitigate emissions to the environment increase.
Most of the sulphur in Chalcopyrite turns into Sulphur dioxide (SO 2). The reaction of these processes can be written as: 2CuFeS2+2SiO2+4O2 → Cu2S+2FeSiO3+3SO2. The copper extracted from this process is mixed with …
In recent decades, many efforts have been devoted to hydrometallurgical leaching of chalcopyrite. The most often used leaching medias were acidic sulfate, acidic chloride, and basic ammonia solutions (Li et al., 2020).Nevertheless, despite the enhanced copper extraction to some extent, some disadvantages still exist.
Hydrometallurgy, 2017. Chalcopyrite ore was roasted at 200, 550 and 800ºC in reducing (5%H 2 /95%Ar) and inert (N 2) atmospheres to examine the effects of the thermal pre-treatment on the phase mineralogy and on subsequent copper extraction using sulfuric acid media.
The most important method for copper extraction from chalcopyrite is pyrometallurgy. Pyrometallurgy is commonly used for large scale, copper rich operations with high-grade ores. [24] This is because Cu-Fe-S ores, such as chalcopyrite, are difficult to …
Agacayak et al. showed that in a pure H 2 O 2 solution, copper extraction from chalcopyrite is directly proportional to the hydrogen peroxide concentration, but the extraction decreases at temperatures above 60 °C.
At an O:A ratio of 2:1, single stage copper extraction from chalcopyrite leachate by 10% Mextral 54-100 (raffinate pH of 9.87) was 93.20% and 95.57% by 5% Mextral 84H (raffinate pH of 9.91) with the rejection of all impurity elements …
Chalcopyrite has several industrial uses due to its copper content and other properties. Some of the major industrial uses of chalcopyrite include: Copper production: Chalcopyrite is the most important source of copper ore, and it is primarily used for the extraction of copper. It is usually processed through crushing, grinding, and flotation ...
A three-stage fluidizing-bed process consisting of chlorination, selective oxidation and sulfur chloride conversion was tested for processing chalcopyrite concentrate. It was found that the use of excess oxygen was essential for the stable operation of the oxidation reactor. The excess-oxygen gas inevitably causes the oxidation of the sulfide concentrate in the chlorination …
In this paper, we describe a green solvometallurgical process for the extraction of copper from sulfidic ore minerals, with the emphasis on chalcopyrite. The preferred organic solvent is ethylene glycol with FeCl 3 as the oxidizing agent.
Three of the processes introduced above have made great strides in solving these problems for the extraction of copper from chalcopyrite: The GEOCOAT™ Process - A heap leaching process that is capable of bioleaching copper …
A variety of methods exist to extract copper from chalcopyrite, alternative to the current route, which conceptually dates back to antiquity. Indeed, Baba et al. [9] and Prasad et al. [18] review novel techniques for processing chalcopyrite.Both surveys focus …
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The copper (II) ion in the chalcopyrite is reduced to copper(I) sulfide which is reduced further to copper metal in the final stages. The iron in the chalcopyrite ends up …
However, mechanical activation is an important parameter for increasing metal extraction, so that copper extraction increases to 83% from 47% after 30 min of grinding chalcopyrite by a high-energy ...
The Mining of Copper: Copper is typically extracted from the ore chalcopyrite (CuFeS 2 ), also known as Copper Pyrites and other sulphide ores. The percentage of copper in these ores is so low that the direct extraction of …
is essential for leaching; a copper extraction of 95.4% was achieved with oxygen injection, while only 33.4% copper extraction was obtained without introducing oxygen. A kinetic analysis indicates ...
In this study, a solvometallurgical process for the extraction of copper from sulfidic ore minerals (chalcopyrite, bornite, chalcocite and digenite) was developed by using an organic lixiviant ...
The copper dissolves in the form of divalency during the extraction of chalcopyrite, where it is used in oxidation [5]. The recovery of copper from sulfide ores using a chlorination technique (using chlorine gas as a chlorinating agent) has been investigated by several researchers at temperatures between 573 and 1023 K under inert gases [18 ...
The addition of NaCl in the ammonium persulfate-APS (as an oxidant) leaching was investigated. APS has some advantages compared with conventional oxidants and its standard redox potential (E°) is 2.0 V. Effect of six parameters such as NaCl concentration, APS concentration, temperature, time, liquid–solid ration (L/S), and stirring speed on the leaching …
COPPER Copper pyrite or chalcopyrite (CuFeS 2). Chalocite (Cu 2 S) or copper glance. Malachite green [CuCO 3.Cu(OH) 2]. Azurite blue [2CuCO 3.Cu(OH) 2]. Bornite (3Cu 2 ... Following steps are involved in the extraction of copper. Crashing and Grinding The ore is crushed then ground into powder. CONCENTRATION-Floatation process. The finely
Although the values of the electrochemical potential of the tests are very similar, there is a significant difference in the extraction of copper (Figure 2) by different consortia, this contrasts with results reported by Hiroyoshi et al. (2004), who notes that the reaction of leaching of chalcopyrite is known to be very sensitive to the redox ...
Copper extraction from chalcopyrite is directly proportional to hydrogen peroxide concentration, but the extraction decreases at temperatures above 60°C. The maximum copper extraction was obtained with the following conditions without stirring: 240 min of leaching time, 3.0 M hydrogen peroxide concentration, 40°C leaching temperature and 53 ...
Key words: copper, extraction, electrowinning, chalcopyrite, aqueous solutions, hydrometallurgy, ionic liquids, molten salts, sulfides, electrochemical engineering, renewable energy Abstract The transition to renewable energy infrastructure necessitates rapid growth in copper production, averaging at least 3.5% annually to 2050.
Extraction Methods: Modern copper extraction from chalcopyrite ores utilizes two main methods: pyrometallurgy and hydrometallurgy. Pyrometallurgy: This high-temperature process involves crushing, grinding, and flotation to concentrate the chalcopyrite. The concentrate is then smelted to convert it into a copper matte (a mixture of copper and ...
Although the values of the electrochemical potential of the tests are very similar, there is a significant difference in the extraction of copper (Figure 2) by different consortia, this contrasts with results reported by Hiroyoshi et al., who notes that the reaction of leaching of chalcopyrite is known to be very sensitive to the redox ...
In this study, a solvometallurgical process for the extraction of copper from suldic ore minerals. (chalcopyrite, bornite, chalcocite and digenite) was developed by using an organic lixiviant …
A conceptual flowsheet is proposed, where chalcopyrite concentrate can be extracted by a leaching–grinding process and copper can be recovered by a solvent …
IMPORTANT ORES OF COPPER 1. Copper pyrite or chalcopyrite CuFeS2 2. Chalcocite or copper glance Cu2S 3. Malachite green [CuCO3.Cu(OH)2] 4. Azurite blue [2CuCO3.Cu(OH)2] 5. Bornite or Peacock ore [3Cu2S.Fe2S3] 6. Cuprite Cu2O ... • Following steps are involved in the extraction of copper: 4.
extraction of major constituents such as copper and iron in chalcopyrite concentrate. Copper and iron dissolution yields from original concentrate could be obtained as about 20% and 22% respectively under the conditions of 0.25 kg/L of APS concentration, 333 K of leaching temperature, 240 min of leaching time, 0.25 mol/L of H2SO4
Chalcopyrite, as the most abundant source of sulfide copper in the Earth's crust and one of the most refractory sulfide copper minerals, has been investigated intensively for copper...
Efficient separation and extraction of copper ions from electroplating wastewater by capacitive deionization using chalcopyrite (CuFeS 2) electrode. Author links open overlay panel Caiyun Wang a b, Zhiquan Yang a b, Shuai ... Selective extraction of copper ion (Cu 2+) from effluent not only alleviates the shortage of resources, but also has ...
About 3/4 th of Copper (Cu) produced in the world has come from Chalcopyrite (CuFeS 2), but it is the lowest standard ore of Copper. The method used to extract copper from its ores depends on the nature of the ore. Sulphide ores such as chalcopyrite are converted to copper by a different method from silicate, carbonate or sulphate ores.
A low-temperature-chlorination selective oxidation followed by aqueous chloride leaching and SX-EW for producing electrolytic copper, elemental sulfur and ferric oxide was investigated for hydrometallurgical processing of a chalcopyrite concentrate. In this article, the selective oxidation phase of the process is described. The selective oxidation requires a …
Sulfide ores such as chalcopyrite ((CuFeS_2)) are converted to copper by a different method from silicate, carbonate or sulfate ores. Chalcopyrite (also known as copper pyrites) and similar sulfide ores are the commonest …
of chalcopyrite concentrates in aqueous chloride media can solubilize copper, a large amount of iron ions also goes into solution. This iron must be removed by precipitation prior to recovery of copper. Disposal of precipitates of iron in the form of hydroxides or goethite will be a …
Effect of dissolved oxygen (DO) As has been shown in Eq. (4), oxygen is required to complete the copper extraction from chalcopyrite and in order to evaluate the effect of oxygen level on copper extraction; chalcopyrite was leached in 0.2 M glycine at different controlled DO levels.
The XRD, SEM-EDS, and XPS measurements indicate that chalcopyrite reacts to form copper(I) chloride (CuCl). After the reductive treatment, the mineral products are leached by iron(III) sulfate to demonstrate the complete extraction of copper. The chromium(II) ion may be regenerated by an electrolysis unit inspired by an iron chromium flow ...
To evaluate the effect of slaked lime as an alternative pH modifier, leaching of chalcopyrite in glycine solution was conducted using lime with copper extraction of 43% being obtained which is less than the 52% copper extraction in the glycine solution with caustic soda (for the same leach duration, i.e. after the 580 h of leaching). This may ...