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Pyrite Leaching Behaviour under CESL Process Conditions

Pyrite Leaching Behaviour under CESL Process Conditions H. Salomon-De-Friedberg Teck Resources Limited 12380 Horseshoe Way Richmond, B.C., Canada V7A 4Z1 ([email protected]) ABSTRACT The amount of pyrite in copper concentrates fed to the CESL Process can vary appreciably. The fraction of pyrite that oxidizes influences both capital and

Copper and Pyrite Separation by Selective and Sequential

Metallurgical ContentThe Problem with copper-pyrite oresThe copper pyrite separation Process FlowsheetCrushing circuit of a copper pyrite oreCopper pyrite ore Grinding circuit Flotation process of Copper-Pyrite mineralsSampling The Problem with copper-pyrite ores This flowsheet, is designed for the treatment of a copper-iron sulfide ore containing appreciable values in gold.

Bioleaching: Introduction, Methods, Application, Copper

This leaching process takes place without direct involvement of microorganisms but they indirectly support the leaching by producing agents responsible for oxidation of minerals. It can be explained by the process of oxidation of pyrite. Pyrite is a common rock mineral that is found in association with many ores. The pyrite is initially oxidized to elemental sulphur equation 4, which is

Leaching of Copper Sulphides SAIMM

available for use in a copper heap leaching unit process. In this way, an acid credit to the operating cost is derived (Dreisinger, 2006). Secondly, it is worth noting that the POX residue can be leached in an atmospheric halide leaching step to recover precious metals, such as gold and silver, that may be present in the copper concentrate. This additional step is likely to improve the

Galvanox Copper Leaching Process

This will insure that copper from the pyrite does not “drown out” the copper in the major material. The second test should be with a proven pyrite. Active pyrite is the A standard. If the candidate material reacts to pyrite or another proven pyrite but does not react with the pyrite already in the con, have a look at where in the flotation process the pyrite is being produced. Generally

Heap leaching Wikipedia

Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from oreusing a series of stone reactions that absorb specific minerals and re-separate them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the ore, whereas in situ mining lacks these liners and pulls pregnant solution up to obtain the minerals. Heap leaching is widely used i

The mechanism of chalcopyrite leaching in the presence of

In this process, pyrite samples are pretreated with a miniscule amount of silver and used as a catalyst in atmospheric leaching of chalcopyrite. The aim of this study was to understand the mechanism of this process and to reveal the role of silver and pyrite in accelerating the rate of chalcopyrite leaching. It is shown that this process, known as Galvanox™, is the galvanically assisted

Copper extraction Wikipedia

Copper extraction refers to the methods used to obtain copper from its ores.The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.

The role of galena associated with silver-enhanced pyrite

Accordingly, in the Galvanox™ process, it has been noted that pyrite samples from different sources influence the kinetics of chalcopyrite leaching differently. Recently, extensive research has been conducted to improve the catalytic properties of pyrite such that all pyrite samples accelerate the rate of copper extraction from chalcopyrite regardless of the source of pyrite samples ( Nazari

Bioleaching: Introduction, Methods, Application,

Bioleaching: Introduction, Methods, Application, Copper, Microorganisms, and Processes! Introduction to Bioleaching: Leaching process was first observed in pumps and pipelines installed in mine pits containing acid water. This process was later on employed for recovering metals from ores containing low quantity of the metal. Presently certain metals from sulfide ores and other ores are

WO2012000090A1 Leaching process for copper

A method of recovering copper from chalcopyrite concentrate by stone leaching, using pyrite and silver. The catalytic properties of pyrite in the chalcopyrite leaching process are significantly enhanced by pretreating the pyrite with silver ions. Particulate pyrite is exposed to a solution containing silver ions to form silver-treated pyrite.

Separation and Recovery of Copper from Copper-Bearing

In this study, a process of acid leaching was used to separate and recover copper from the pyrite cinder (containing 0.60 wt.% Cu and 56.01 wt.% Fe). Both sulfuric acid and phosphoric acid systems were taken into consideration, and the effect of leaching parameters on the recovery of copper was conducted to investigate the effect of selective leaching in the two acidic systems. The results

(PDF) Competitive bioleaching of pyrite and chalcopyrite

A process of the high temperature ferric leaching of the copper-zinc concentrate and pyrite product during a two-step biohydrometallurgical technology was studied. It was shown that the use of the

LEACHING KINETICS OF COPPER FROM CHALCOPYRITE

LEACHING KINETICS OF COPPER FROM CHALCOPYRITE CONCENTRATE IN NITROUS-SULFURIC ACID Ozge GOK*, “nitric acid” leaching was practiced under various process acronyms such as NSL (Brennecke et al., 1981), NITROX (Van Weert et al., 1986), ARSENO, and REDOX (Beattie et al., 1989). More recently, a novel process involving nitrogen species-catalyzed pressure leaching

Heap Leaching Mining Techniques, Metals Mining, Copper

Heap leaching is an industrial mining method to dig out precious metals and copper compounds from ore. Process of heap leaching The mined ore is crushed into tiny chunks and heaped on an impermeable stone and/or clay lined leach pad where it may be

(PDF) Leaching of Copper Sulphides ResearchGate

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

Copper leaching from chalcopyrite concentrates

These processes recover copper via hydrometallurgical leaching of the copper component of chalcopyrite concentrates, followed by solvent extraction and electrowinning. A number of demonstration plant operations have been conducted, but as of this writing none of the processes have become completely commercially operational. Keywords Chalcopyrite Jarosite Copper Cathode Ferric

Optimal Conditions for Ammonia Leaching of Copper

Optimal Conditions for Ammonia Leaching of Copper/Chalcocite-Rimmed Pyrite: Part 2 . Martin Y. Woode 1 1Department of stone Engineering Kwame Nkrumah University of Science & Technology (KNUST) Kumasi, Ghana. Mike A. Acheampong 2* 2Department of stone Engineering. Kumasi Polytechnic. Kumasi, Ghana. David Azanu 2 2Department of Chemical

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 a bioxidation heap. The support rock itself may be a low-grade copper ore. The ratio of support rock to concentrate is in the range of 5:1 to 10:1 by weight. The heap

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