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Chloride heap leaching - BHP Billiton SA Limited

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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Bio-Heap Leaching of Primary Copper Sulfide Ore by JOGMEC ...

JOGMEC has been carrying out the study on primary copper sulfide ores leaching for recovering copper economically and efficiently by heap leaching. In our study, we have been using the primary copper sulfide ore produced in an IOCG deposit. The ore is characterized by high iron content and high acid consumption in leaching. For the optimization of the leaching, the conditions such as ore size ...

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The bioleaching of sulphide minerals with emphasis on ...

The leaching and bioleaching of copper sulphides is examined. The main focus is on heap bioleaching of whole ores, and the development of models to describe heap and dump processes that can be applied in the design phase as well as to optimise metal extraction. The characteristics of chalcopyrite leaching are discussed in respect of those ...

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Minerals | Special Issue : Heap Leaching: The State-of-the-Art

The aim of this study was to improve the dissolution of copper sulfide ore composed mainly of chalcopyrite (1.21 wt %) and bornite (0.54 wt %) using a pretreatment before leaching. The effect of the pretreatment on copper sulfide dissolution was investigated using different types of leaching. ... Heap leaching of caliche ore is carried out by ...

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innovations and future directions: A review Heap leaching ...

Some types of heap leaching are commercially successful (U, Cu and Au) and some remain novel ideas or under-commercialised (Zn, Ni, Mn, Co and primary-sulphide copper). The reason the heap leaching of some commodities has not yet been commercially successful is less because

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Characterization of a low-grade copper-sulphide ore to ...

Copper-oxide ores are suitable for heap leach and ISR processing, secondary copper-sulphide ores are suitable for heap leaching. Examples can be found in the reviews of Watling (Reference Watling 2006) and Sinclair and Thompson (Reference Sinclair and Thompson 2015). More work is required to understand the suitability of primary and secondary ...

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Dynamic of active microorganisms inhabiting a bioleaching ...

Using pregnant leaching solution as an indicator of the microbial communities within an industrial bioheap. Based on the necessity of understanding the microbiology of heaps (Brierley, 2001), we monitored the composition and dynamic of the microbial communities from an industrial bioleaching sulfide heap.

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Sulphide Leaching - Mineral Processing & Metallurgy

And in the case of cuprous sulphide Cu 2 S + 2Fe 3 + ^ CuS + Cu 2 + + 2Fe 2 + CuS + 2Fe 3 + ^ Cu 2 + + 2Fe 2 + + S During leaching with Ferric ion a critical balance between Fe 2 + and Fe 3 + ions in the leach solution is essential to maintain efficiency of leaching and subsequent electrolysis. The ferric ion is also very sensitive to pH ...

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Leaching of a low-grade, copper-nickel sulfide ore. 1. Key ...

chalcocite. Together with dump leaching of mine waste, heap leaching contributes about 20% of annual world copper production (Watling, 2006). The leaching of several low-grade nickel sulfide ores has also been investigated in pilot-scale heaps (Watling, 2008), including test heaps at Radio Hill, Western Australia and at Talvivaara, Finland.

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Gold Cyanidation Heap Leaching - cnlitereagent.com

Heap leaching is a method in which a leaching solution is sprayed with a spray leaching system to selectively leach the useful minerals in the ore and recover the useful mineral from the pregnant liquid flowing out of the heap during the infiltration process. Low-grade gold ore heap leaching is a new gold extraction process developed in the 1980s.

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Heap leaching of nickel sulfide ore

Heap leaching is a widespread technology for gold and copper production, typically utilized in arid and warm locations. However, the Terrafame (former Talvivaara) operation in Finland is the only operation that utilizes heap leaching for nickel and zinc production, furthermore in a net positive rainfall area with low temperatures.

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Corvus Gold Receives Sulfide Gold Recovery of +90% Using ...

Corvus Gold Inc. - 2 - April 27, 2017 NR17-5 Continued hosts a large oxide resource. In addition to the higher-grade, millable sulfide material, Corvus is conducting tests of sulfide leaching for heap leach applications, similar to the test work conducted

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(PDF) Leaching of Copper Sulphides

Atmospheric leaching of copper sulphides is carried out in challenging conditions of elevated. temperature, low pH and high chloride ion concentrations. In addition, the reacto rs need to ...

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Investigation of Affecting Parameters on Heap Leaching ...

copper metal caused that hydrometallurgical and heap leaching method has been designed and used. These method, in addition to being less pollution to the environment is included, provides the extraction of copper from low grade oxide and sulfide ores [3]. Heap leaching has been demonstrated as a viable and low cost approach to open-pit

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A comprehensive model for copper sulphide heap leaching

A comprehensive model for copper sulphide heap leaching. Hydrometallurgy, 2012. Mark Cross. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Download PDF. Download …

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Heap Leaching Oxide and Sulfide Copper Ores

The most successful copper heap leaching operations have been those processing copper oxides and secondary copper sulphides ().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 heap aeration …

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HEAP LEACHING TECHNIQUE in MINING

Heap leaching is a tried and tested mining technique enabling the processing of different kinds of ores which could not otherwise be exploited under viable economic conditions. Modern day ... ore type (namely, oxide or sulphide), mineral composition, matrix features of ore

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Feasibility study on heap bioleaching of chalcopyrite ...

12%The mineral deposit has a total of 2.88 billion tons ore with copper grade below 1.5 % for bioleaching, of which 2.56 billion tons ore are sulfide ore with copper grade of 0.3 %–0.7 %, others are oxide and sulfide mixed ore. The heap leaching field in Escondida copper mine is the largest in the world with a length of 4.9 km, width of 2 km ...

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A BACTERIAL HEAP LEACHING APPROACH FOR THE …

The application of heap leaching to more refractory chalcopyrite material is still under development. Figure 1 – Relationship between ore grade and method of recovery During sulphide heap leaching, bacterial activity can be utilised to catalyse the oxidation of iron, which acts as an electron carrier between the mineral and oxygen for

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(PDF) Process options in the treatment of a mixed ...

INTRODUCTION The main expansion in hydrometallurgical copper extraction continues to be in heap leaching of secondary sulphide and oxide ores. It has made, and will continue to make, a major contribution to efficient recovery of copper from many ore bodies (1). The Thin Layer Bacterial (TLB) heap leaching is a process that offers the ...

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Leaching of Copper Sulphides - SAIMM

sulphide leaching options as alternatives to the more conventional pyrometallurgical processing route for copper sulphides. Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper chloride leaching. Ferric sulphate leaching and

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NEW LEACH TESTS SHOW POTENTIAL FOR HIGH CU …

previously been unable to process sulphide ores due to a lack of availability of good quality water. BioHeap has developed a patented bacterial heap leaching process BioHeap™ which leaches low grade sulphide ores using adapted proprietary bacterial cultures. During 1999 to 2001 BioHeap™

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Heap Leaching - an overview | ScienceDirect Topics

13.5 Heap Leaching of Nickel Sulfide Ore. An alternative to intensifying the rate of leaching of concentrates is to heap leach the whole ore. This has the significant advantage of eliminating the concentration of the sulfides, which is the step that has the lowest recovery on route from ore to metal.

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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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US20080241024A1 - Method for Leaching Metal Sulphide ...

The invention relates to a method for the sulphate-based leaching of metal sulphide minerals, such as chalcopyrite, CuFeS 2, containing ore in atmospheric conditions. It is beneficial for the leaching of metal sulphides that the sulphide to be leached is treated before leaching or at the beginning of leaching with a sulphide salt that is more noble than the sulphide or the components it includes.

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Minerals | Free Full-Text | Heap Leaching: Modelling and ...

Heap leaching of low grade complex copper sulphide ore bodies must contend with slow leach kinetics at ambient conditions, particularly for chalcopyrite and other copper-containing complex sulphide minerals, thus the control of leach reaction chemistry becomes …

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Mathematical model for coupled reactive flow and solute ...

heat conservation during copper sulphide heap leaching, and postulated a new mode of heap behaviour called evaporative autocatalysis. DE ANDRADE LIMA [13] presented a model to simulate the transient evolution of the dissolved chemical species in the heap and column isothermal leaching processes. CARIAGA et al [14]

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Development of a Theoretical Approach to The Heap Leaching ...

Heap leaching of copper sulphide and oxide ores' has been conducted at Rum Jungle since the end of 1965.A review of operations was made and this led to an examination of some theoretical aspects of copper sulphide heap leaching. Ox,ygen diffusion was indicated to be the factor controlling copper leaching rate at Rum Jungle and in other similar operations.

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Dump and Heap Leaching - HydroJex

heap leach process is designed to contain all solutions from the environment and recover the dissolved metal or mineral values. For copper and other metal sulfide minerals, the heap leach process has evolved to incorporate bacteria and nutri-ents into the barren …

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Hycroft Mining continues evaluation of novel sulphide heap ...

Long-term operating scenarios may include conventional run-of-mine cyanide heap leaching for the oxide and transitional material, sulphide heap oxidation and leaching using the novel process, and an appropriately sized milling and flotation plant for processing the higher-grade ranges of sulphide material.

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Microbiological and geochemical dynamics in simulated-heap ...

The evolution of microbial populations involved in simulated-heap leaching of a polymetallic black schist sulfide ore (from the recently-commissioned Talvivaara mine, Finland) was monitored in aerated packed bed column reactors over a period of 40 weeks. The influence of ore particle size (2-6.5 mm and 6.5-12 mm) on changes in composition of ...

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HEAP LEACHING Technology options and innovation for …

HEAP LEACHING Mining & Quarry World | Volume 17 | Issue 5 | October 2020 T he metallurgical heart of the majority of copper oxide processes is the heap leaching operation. Fresh low grade sulfide ores is a far greater challenge. The success of this unit operation is so important that operators need to understand the ramifications of their

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