LEACHING OF A ROASTED COPPER SULFIDE ORE

In the present work, a roasting-acid leaching process that associated pyrometallurgical and hydrometallurgical methods has been used for the recovery of copper from a copper sulfide concentrate. The reactions investigated show …

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Study of Factors Affecting the Copper Ore …

The biotechnological copper leaching process involves the irrigation of ore materials or technogenic waste-containing metal sulfides using sulfuric acid solutions and iron salts, as well as the introduction of viable thionic, iron …

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A comprehensive model for copper sulphide heap leaching: …

The modeling of the copper sulfide heap leach system developed considers: the modeling of liquid phase transport (via the Darcy flow shown in Equation (63)), hydraulic conductivity (described by ...

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New breakthrough copper recovery process developed

The rapid leach kinetics and high copper recoveries place FL ROL's process economics on par with stirred-tank leaching of secondary copper sulphide concentrates. The key to the high performance of the process is the use of very low energy, inter-stage or intra-stage attrition along with the activation of the mineral to enhance the ...

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Leaching process for copper concentrates

A method of leaching copper from copper sulphide-containing concentrates, such as chalcopyrite, includes using pyrite as a catalyst for ferric reduction in order to eliminate passivation of the chalcopyrite surface, the process being carried out under conditions whereby the pyrite is not materially oxidized, for example by maintaining the operating solution potential at a suitable level.

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LEACHING OF A ROASTED COPPER SULFIDE …

Copper sulphate is soluble in water, so acid will be saved in the leaching process if copper sulphate is present. From assays of the pregnant liquor the percentage extractions of the copper present in the calcine were calculated. ... LEACHING …

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Copper Pressure Leaching Process

Get sustainable copper recovery from copper sulfides with very high copper leach extractions. The copper pressure leaching process combines our highly effective pressure oxidation and leaching technology with world-renowned VSF …

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A fresh approach to sulfide ores

Sally Rocks, senior research and development chemist on the FL ROL process team, is working closely with a team of chemical engineers, geologists and mineral processing engineers to perfect the technology. The first step in the discovery process was a comprehensive review of decades of research on copper sulfide leaching.

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Cu Leaching Using Regenerated Ferric Sulphate

called the "Regenerated Ferric Sulphate Leaching (RFSL) process, in which the reoxidation of the ferrous ion is carried out under strictly atmospheric conditions, using SO. 2 /O. 2. ... abundant copper sulphide mineral, and efficient treatment methods for producing high quality copper from chalcopyrite concentrates have been in use for ...

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Pressure leaching of copper sulphide from nickel refining: …

The global production of nickel is largely based on nickel sulphide minerals (60%) with pyrometallurgical converting into matte, followed by a hydrometallurgical process with unit processes such as leaching (atmospheric and/or pressure), iron removal, solvent extraction (SX) for cobalt and nickel and final product recovery, typically by electrowinning (EW), hydrogen …

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Heap Leach Process – Cyprium Metals Limited

Sulphide leaching is exothermic, generating its own heat to facilitate leaching of copper Air, ground water, acid and electricity are the primary inputs, together with a limited number of other reagents required in the process, which reduces production and maintenance costs

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Copper leaching from primary sulfides: Options for …

This process involves the leaching of copper from sulfide minerals using Fe 3+ ions, which is a strong oxidizing agent, in stirred reactors at atmospheric pressure and elevated temperatures (80-90 ...

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How copper dump leaching works

Extrapolations of copper sulphide grain exposure data indicate that the portion of copper available for leaching decreases to 10% when the ore particle size is increased to between 100 and 200 mm. In terms of kinetics, the observed leaching rate is a product of the chemical reaction rate itself and various transport processes such as for heat ...

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metals Pretreatment of Copper Sulphide Ores Prior to Heap Leaching…

process, unlike other copper sulphide leaching methods, has several advantages: One of these advantages is the short heap leaching times, which range from 100 to 110 days [

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Copper Mining and Processing: Processing Copper …

This process uses a series of physical steps and high temperatures to extract and purify copper from copper sulfide ores, in four basic steps: 1) froth flotation, 2) thickening, 3) smelting, and 4) electrolysis.

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Leaching of Copper Sulphides

Inplace leaching techniques are applicable to leaching oxide and sulfide ores of copper and other metals. The basic principles involved are similar to those for dump or heap leaching. The leach solutions must pass downward …

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Bioleaching Process for Copper Extraction from …

The main disadvantage of sulfide (bio)leaching is that the process is considered slow compared to the pyrometallurgical process and other high-intensity hydrometallurgical processes ... microbial strains that are accustomed …

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TECK'S CESL COPPER PROCESS: A COMMERCIAL READY …

implement Teck's CESL Copper Process. The CESL Copper Process is as a medium temperature pressure leach for sulphide concentrates in the presence of chloride catalytic ions (12 g/L). In most cases a light re-grind of the mill concentrate is necessary to reduce particle size. Grinding the concentrate increases the

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SART for copper control in cyanide heap leaching

cation with addition of soluble sulphide, separation of the resulting copper sulphide precipitate, and addition of lime to re-establish alkalinity prior to returning the solution to the leaching process, recovering both copper and cyanide as valuable products. In principle SART is very simple. Yet some SART plants that have been built may

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Leaching of a pyrite-based ore containing copper using …

The oxidation of sulfide-based ores is industrially relevant as it facilitates the extraction of valuable metals and eliminates undesired elements from an ore. Even though oxidation can be done thermally (pyrometallurgy), solution-based (hydrometallurgical) methods are currently sought as they represent a more sustainable option. Here, the leaching of a …

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Antofagasta Minerals' Cuprochlor-T® process

With this leaching process that could change, points out Muchnik, especially at sulphide mines that already have existing electrowinning infrastructure at their operations. Work continues to optimise the Cuprochlor-T ® process and, crucially, its cost, says Abraham Backit. One focus of attention is the energy used to heat the heap.

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In situ recovery of copper sulfide ores: Alternative process …

Dissolution of sulfide ores requires oxidative leaching conditions, then ISR can be conducted by applying bacterial leaching, a technology which is established in the copper industry for the treatment of copper sulfide ores in heaps and dumps (Ghorbani et al., 2016; Petersen, 2016).Therefore, the choice of the permeability stimulation approach which defines the …

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Copper sulphate leaching process

Ferric chloride process includes the following process steps: Ore or concentrate repulping ; Atmospheric ferric leaching ; Leaching residue separation and washing ; Gypsum removal and solution cooling ; Copper solvent extraction ; Copper electrowinning ; Water balance management and bleed treatment

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The Albion Process™ for Copper/Zinc Concentrates

The Albion Process™ for Copper/Zinc Concentrates 3. Oxidative Leaching After the sulphide concentrate has been finely ground, it is then leached under atmospheric conditions in an oxidative leach consisting of interconnected Albion Process™ Leach Reactors. Each Reactor is an atmospheric leaching vessel

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Pretreatment to Leaching for a Primary Copper Sulphide …

The dissolution of copper sulphide ores continues to be a challenge for the copper industry. Several media and leaching alternatives have been proposed to improve the dissolution of these minerals, especially for the leaching of chalcopyrite. Among the alternatives, pretreatment prior to leaching was proposed as an option that increases the dissolution of copper from …

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Innovations: How Hydrometallurgy and the SX/EW Process Made Copper …

This is used as an adjunct to the SX/EW process in situations where sulfide copper minerals must be leached. Modern commercial application of bacterial leaching began in the 1950s at Kennecott's Bingham mine near Salt Lake City, Utah. ... Most commercial operations leaching copper from ore dumps are located in the Southern Hemisphere in ...

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Bioleaching: Introduction, Methods, Application, Copper, Microorganisms

Generally heap leaching process is employed in copper leaching process but sometimes a combination of heap leaching and in situ leaching processes are used. The solution (Sulphate/Fe 3 solution) is sprinkled over the heap which percolates through the ore and collects at the bottom pit. The solution collecting in the bottom pit will include ...

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(PDF) Leaching of Copper Sulphides

Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper chloride leaching. The effect of mineralogy...

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Copper Pressure Leaching Process

The copper pressure leaching process combines our highly effective pressure oxidation and leaching technology with world-renowned VSF solvent extraction and electrowinning technology. The process also enables precious metals recovery from leaching residue with cyanide leaching technology.

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A Review of the Cyanidation Treatment of Copper-Gold Ores …

The treatment of copper sulfide minerals containing a high percentage of oxide copper causes problems in the concentration process, decreasing the copper content. In order to increase the efficiency of the concentration process, it is necessary to treat the copper oxide component by leaching the grinded ore prior to the flotation, or by ...

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Producing Copper Nature's Way: Bioleaching

The GEOCOAT™ Process - A heap leaching process that is capable of bioleaching copper concentrates. It does this by coating the concentrate slurry onto a support rock, or substrate material, and stacking this coated material in …

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The bioleaching of sulphide minerals with emphasis on copper …

The most successful copper heap leaching operations have been those processing copper oxides and secondary copper sulphides (Table 1).Chalcocite (Cu 2 S) is the main copper sulphide mineral mined at bioleaching operations. Some of the chalcocite heap operations began as oxide (chemical) leach operations and were converted to bioleach (oxidative) operations by …

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Accelerating Copper Leaching from Sulfide Ores …

This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini-columns in acid-nitrate-chloride media. Ten pretreatment tests were conducted …

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(PDF) BIOLEACHING OF COPPER ORES AND …

Hydrometallurgical extraction accounts for about 20% of total primary copper production. Most of this is produced by heap leaching. Heap leaching consists of trickling H2SO4-containing lixiviant ...

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Direct Leaching of sulfides: Chemistry and applications

The sulfide minerals associated with copper, nickel, zinc, lead, and molybdenum concentrates are described according to their thermodynamic stability zones on Eh-pH diagrams. From these zones, the chemistry associated with various thermodynamically feasible decomposition paths is discussed, and process developments associated with the most favorable decomposition paths …

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Copper Heap Leaching | Encyclopedia MDPI

All of the above has led to the need to investigate the development of a profitable hydrometallurgical process to treat these minerals since hydrometallurgy is a good alternative to process both oxidized minerals and sulfide minerals environmentally friendly [] [] [].Heap leaching is a hydrometallurgical approach and continuously developing mineral processing and …

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Copper leaching from primary sulfides: Options for …

The process uses thermophile bacteria to oxidize and leach copper from sulfide concentrates. The thermophile bacteria oxidize sulfide minerals to metal sulfates and sulfuric acid at temperatures of 65–80 °C. ... The autoclave oxidation of pyrite/sulfur will provide virtually all acid and ferric sulfate (and heat) required for the copper ...

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Sulphide Leaching

Copper sulphate can be used to separate Copper from Nickel in a sulphide ore or Copper from Fe in Cu -Fe sulphide ore. CuSO 4 solution can also be used for removing Pb, Zn, and Fe from copper sulphide ores. In presence of oxidizing agents: Ferric ion: Ferric sulphate or chloride react with metal sulphides liberating elemental sulphur, e.g.

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Selective recovery of antimony from Sb-bearing copper …

Awe et al. (2013) and Baláž and Achimovičová (2006) used a copper concentrate containing tetrahedrite (1.7 wt% after flotation), to demonstrate that the alkaline sulphide leaching process is effective in selectively dissolving Sb and As from copper concentrates before the smelting stage (Awe and Sandström, 2011; A. Awe and ...

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