The Extraction of Copper from Chalcopyrite Concentrate …
A series of leaching tests were carried out to investigate the effect of the solid/liquid ratio, stirring speed, temperature, oxidant and acid concentrations, and …
A clean separation process using pretreatment-flotation for …
The mixed concentrate was polymetallic sulfide ore dominated by galena and chalcopyrite, which was difficult to separate by conventional flotation method. In this study, a new process combining sulfuric acid pretreatment and flotation separation was carried out for the separation of the mixed concentrate.
Chalcopyrite leaching in novel lixiviants
Chalcopyrite is the dominant Cu ore mineral in most porphyry deposits, which make up an estimated 70% of the ... used a chalcopyrite concentrate with a chemical composition corresponding to a maximum purity of 81.8% chalcopyrite. The chalcopyrite ... suggesting that the leaching process begins with reaction (11) and …
Extraction Of Copper | Mining, Concentration, Smelting
The commonest ore used in the extraction of copper is Chalcopyrite (CuFeS 2) also known as Copper Pyrites and other such sulphides. The percentage of copper in the actual ore is too low for direct extraction of copper to be viable. The concentration of ore is required and it is done by the Froth Flotation method. Concentration of Ore:
Chalcopyrite ore beneficiation process and method
The chalcopyrite primary ore used in the present invention mainly contained 0.94% Cu, 23.20% TFe, 14.38% S, 3.9% MgO, 28.03% SiO 2, and the principal mineralogical composition were sulfide minerals (including 24.75% pyrhotite, 10.71% pyrite, 3.07% chalcopyrite, 0.01% galena, etc), 8.07% iron oxide (mainly comprising magnetite), and …
Solvometallurgical process for extraction of copper from chalcopyrite
Leaching percentage of Cu with 0.5 mol L −1 of FeCl 3 in ethylene glycol for different mineral powders at a solid-to-liquid ratio of 50 g L −1 at 90 °C for 24 h.
Copper leaching from chalcopyrite concentrates | JOM
For more than 30 years, a significant number of processes have been developed to leach copper from chalcopyrite concentrates. These processes recover copper via …
Froth Flotation of Chalcopyrite/Pyrite Ore: A Critical Review
To enhance the leaching of chalcopyrite concentrates, this study evaluated a new process for extracting copper using iodized solutions and sulfuric acid diluted in seawater without pressure or ...
Determination of the Optimum Conditions for Copper …
The optimum conditions for the extraction of copper from chalcopyrite concentrate into SO2-saturated water were evaluated using the Taguchi optimization method. High level copper recovery was obtained in an environmentally friendly process that avoids sulfur dioxide emission into the atmosphere because SO2 forming in the …
A conceptual process for copper extraction from chalcopyrite …
All experiments were carried out using chalcopyrite concentrate samples of size passing 45 µm, except when ultrafine ground, when the particle size was passing 10 µm. The assay was determined by fused disc X-ray Fluorescence assay of the chalcopyrite concentrate, after loss on ignition (LOI).
inorganic chemistry
In the roaster, the copper concentrate (chalcopyrite) is partially oxidized to produce alkaline $(ce{Cu2S})$ and sulphur dioxide $(ce{SO2})$ gas. The chalcopyrite …
Bioleaching of copper from chalcopyrite ore at higher …
Processing low-grade chalcopyrite ore (<0.3% Cu) is the main challenge of copper complexes.. Controlling jarosite makes the process attractive from technical and economical viewpoints.. Two main strategies were studied: ORP control and chloride addition in irrigation. A hybrid lixiviant (Sulfate-chloride) resulted in more than 80% …
Solvometallurgical process for extraction of copper from chalcopyrite …
Abstract. Extraction of copper from sufidic ores, either by pyrometallurgy or hydrometallurgy, has various limitations. 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 (FeCl 3 as oxidizing agent and …
Copper leaching from chalcopyrite concentrates | JOM
Chalcopyrite (CuFeS2) is one of the most abundant copper-bearing minerals, which accounts for approximately 70 percent of the world's known copper reserves. For more than 30 years, a significant number of processes have been developed to leach copper from chalcopyrite concentrates. These processes recover copper via hydrometallurgical …
Attachment of Acidithiobacillus ferrooxidans and …
chalcopyrite mineral concentrate (79.5 wt%, Andina mine, BHP Billiton) and crushed low-grade chalcopyrite-containing ore (ndida, BHP Billiton) were used. Major elemental composition of the concentrates used was deter-mined by X-ray fluorescence analysis. The chalcopyrite concentrate contained 29.8% copper, 25.9% iron and 31.7% sulphur.
Copper extraction from low-grade chalcopyrite in a
As a high-grade ore, the chalcopyrite concentrate has been successfully bioleached with the assistance of MFCs (Huang et al. 2019a). However, high-grade chalcopyrite ores in the world are becoming more and more scarce due to the consumption of copper resources and development of mine industry. ... Assessing a two …
Extraction of Copper: Detailed Process
Copper metal occurs naturally, although minerals such as chalcopyrite and bornite are by far the most abundant sources. Smelting, leaching, and electrolysis are used to extract copper from these ores and minerals. ... Mining is the initial phase in the extraction process. Copper ore must be extracted using either open-pit or subterranean ...
Mechanochemical leaching of chalcopyrite concentrate by …
This study aimed to introduce a new cost-effective methodology for increasing the leaching efficiency of chalcopyrite concentrates at ambient temperature and pressure. Mechanical activation was employed during the leaching (mechanochemical leaching) of chalcopyrite concentrates in a sulfuric acid medium at room temperature and …
Chalcopyrite Dissolution: Challenges | SpringerLink
The lattice energy of chalcopyrite is close to 17,000 kJ mol −1, and the standard enthalpy of formation ΔH f and the standard Gibbs free energy of formation ΔG f ° values are −193.6 and −190.6 kJ mol −1, respectively.These ΔH f and ΔG f ° values are in the common range for sulfide minerals and do not explain the recalcitrance and unfavorable kinetics of …
Processing of chalcopyrite ore by heap leaching and …
Crushed and agglomerated chalcopyrite ore was subjected to bacterially-assisted leaching at ambient temperature in columns that ranged in height from 1 ... be it dissolved or in concentrate, than either process used individually. There are two obvious advantages to processing chalcopyrite ore with such a combined leach/float approach. …
Copper (Cu) Ore | Minerals, Occurrence » Geology Science
Copper (Cu) ore is a naturally occurring mineral deposit that contains copper in varying concentrations. It is an important industrial metal that has been used by human civilizations for thousands of years due to its excellent electrical and thermal conductivity, high ductility, and resistance to corrosion. Copper is widely used in various applications, …
A Review on Novel Techniques for Chalcopyrite Ore Processing …
There are, however, effluents and residues that must be treated in order to protect environment. In the hydrometallurgical processes, the ore or concentrate (chalcopyrite) is brought into close contact with a leach solution (frequently sulfuric acid) that dissolves the copper and leaves a residue of gangue (and frequently precious metals).
MIT Open Access Articles Electrolytic production of …
ground and floated to concentrate the chalcopyrite and other sulfide fraction (containing 25-35 wt% Cu). These comminution and floating processes are costly and energy-intensive, and this energy intensity increases exponentially as ore grades deplete below 0.5% [3]. …
A case study of flotation of chalcopyrite-molybdenite ore …
Roughing and closed-circuit experimental setups were applied to separate pyrite-rich CuS/MoS ore. Compared with ccp-mlb concentrate obtained by conventional process, concentrate obtained by instant PGA-Z200 flotation required significantly lower dosages of Na 2 S to reach the same separation efficiency. The closed-circuit setup was …
Copper leaching from complex chalcopyrite-rich ores: …
The percentage extraction of copper was determined using the following equation: (5) ε Cu 2 + = C 1 V C 2 m × 100 % where C 1 represents the Cu 2+ concentration in the leaching solution (g/L), V stands for the volume of the leaching solution (L), C 2 signifies the copper grade in the chalcopyrite concentrate (wt%), and m is the mass of ...
Chalcopyrite
This has led to extensive study of leaching of chalcopyrite concentrates as an alternative to smelting for copper recovery. Some economic and process drivers for treating chalcopyrite concentrates hydrometallurgically, rather than by smelting, include the following (Baxter, 2016; Dreisinger, 2019; Green et al., 2018): (a)
Gold Extraction & Recovery Processes
Gold in contact with pyrite and chalcopyrite Free gold hosted by pyrite. Also, gold mineral textures and associations with other minerals can be done by modal analysis. ... Recovery is the percentage …
Chalcopyrite: Chemical composition, occurrence and uses
Ability for selective extraction of copper and zinc from zinc concentrate using association of chemolithotrophic bacteria was investigated. ... in pentlandite–chalcopyrite–pyrrhotite ore ...
A Review on the Research of Hydrometallurgical Leaching of …
The hydrometallurgical process used to treat chalcopyrite include acid leaching, ammonia leaching, high-valent iron salt leaching, chloride leaching, hydrogen …
Leaching of Copper from a Nigerian Chalcopyrite-Rich Siderite Ore …
To date, chalcopyrite is the commonest examined copper ore due to its inertness and global abundance indexes. Out of between 150 and 180 global copper ores, chalcopyrite is the most stabilized copper ore, due to its structural configuration [1, 2].It is mostly found in association with pyrite (FeS 2), bornite (Cu 5 FeS 4), sphalerite (ZnS), chalcocite (Cu 2 …
Transformation of chalcopyrite in the roasting …
Studying the process of chalcopyrite concentrates roasting, many researchers concluded that the chalcopyrite oxidation is not developed by its disintegration into simple copper and iron sulfides, but by the …