Copper extraction - Wikipedia

Secondary sulfides – those formed by supergene secondary enrichment – are resistant to sulfuric leaching. These ores are a mixture of copper carbonate, sulfate, phosphate, and oxide minerals and secondary sulfide minerals, dominantly chalcocite but other minerals such as digenite can be important in some deposits.

[Get Price]
Heap Leaching - Hatch

At the same time, they're constantly on the lookout for suitable and cost-effective equipment and systems for every heap-leaching project. Understanding the time-rate-of-recovery dynamics in heap-leach operations is mandatory for analyzing the financial performance of any mining operation. It's also a must for the successful execution of a project.

[Get Price]
Heap Leaching - an overview | ScienceDirect Topics

Heap leaching was initially applied to acid leaching of copper oxide ores and later extended to secondary sulfides and mixed oxide-sulfide copper ores. By introducing bacterial activity and forced aeration to the heaps, an oxidative environment suitable for sulfide oxidation can be achieved.

[Get Price]
Precious Metal Heap Leach Design and Practice

The ideal heap leach location is a temperate semi-arid desert location such as the western U.S. However heap leaching has been successfully applied in a variety of climates: • Illinois Creek, Alaska, and Brewery Creek, Yukon are located near the Arctic Circle and experience temperatures of minus 30oC for several months per year.

[Get Price]
HEAP LEACHING TECHNIQUE in MINING - SDIMI.ORG

Pressure leaching has been in use since 1890’s for recovery of numerous metallic ores with advances in hydrometallurgy. • Heap leaching of gold ore started to gain promenence in the late 1960’s when it was applied on a large scale to low grade ores that were uneconomic to procees by conventional tank leach …

[Get Price]
Effect of biological factors on heap bioleaching kinetics ...

Download Citation on ResearchGate | Effect of biological factors on heap bioleaching kinetics of secondary copper sulfide | Based on the indirect function of bacteria in the leaching process ...

[Get Price]
HEAP CHARACTERIZATION AND MONITORING WITH …

HEAP CHARACTERIZATION AND MONITORING WITH ELECTRICAL RESISTIVITY FOR OPTIMIZING SECONDARY LEACHING Dale RUCKER and Jim FINK hydroGEOPHYSICS, Inc., USA ABSTRACT Electrical resistivity geophysics has been applied on a heap to characterize and monitor changes in saturation after primary and secondary leaching applications.

[Get Price]
Copper heap leach development – not as easy as it looks ...

 · Heap leaching has become increasingly popular in the copper industry for treating oxide and secondary sulphide ores, and is now being extended to primary sulphide ores. The ability to use heap ...

[Get Price]
Optimization of the Heap Leaching Process through Changes ...

Once the process workflow of heap leaching has been characterized, it is possible to model the heap leach stage sequentially with the Arena simulation software. The update of copper recovery over time is simulated by parametrizing the analytical models retrieved from the literature, and incorporating them into the Arena simulation .

[Get Price]
Heap leaching technology - MAFIADOC.COM

A secondary sulphide heap leach requires air injection into the heap to promote bacterial oxidation, and leaching rates are much slower and less predictable with leach times, typically in the range of 250 to 600 days to achieve 90% Cu 83 extraction.

[Get Price]
Gold & Silver - Department of Energy

general methods of contacting ores with leach solutions: (1) heap leaching, (2) vat Gold & Silver 4 . Energy and Environmental Profile of the U.S. Department of Energy leaching, and (3) agitation leaching. Heap leaching and vat leaching account for most gold and silver recovery. These leaching methods are discussed in detail below.

[Get Price]
Mining Liner Protects Against Seepage of Chemicals - XR

 · XR Geomembranes XR ® used for acre mining/ heap leach pad in Arizona. ... Mining Liner Protects Against Seepage of Chemicals. ... The leaching ponds, concrete reinforced structures, require the liner to be sealed around the edges at odd angles - a task simplified by the flexibility of XR . ...

[Get Price]
Publications - Heap Solutions

2014 Heap Leach Conference: Secondary recovery of a copper heap leach. l. Paper. 2013 SME: Optimal Strategies for Leach Pad Injection Operations. l. Paper. 2012 SAGEEP: Monitoring Enhanced Recovery of a Mine Heap: An Application of Real-Time Electrical Resistivity. h. Book Chapter.

[Get Price]
heap leaching Archives - International Mining

Heap leaching works by drip-feeding acid through a large stockpile (or heap) of ore to leach out metals. BHP uses heap leaching at its copper operations in Chile, however Olympic Dam’s polymetallic properties require a different approach, according to the miner.

[Get Price]
Application of Alternative Lixiviants for Secondary Heap ...

PDF | Some preliminary results on the secondary leaching of previously heap leached gold ore are presented. Alternative lixiviants for gold comprising chlorine, thiourea and thiosulphate were ...

[Get Price]
The progression of metallurgical testwork during heap ...

The progression of metallurgical testwork during heap leach design S.W. ROBERTSON and P.J. VAN STADEN Mintek, Randburg, South Africa The depletion of favourably located and higher-grade mineral deposits, combined with more favourable metal prices and higher capital costs, has stimulated research into heap leaching of lower grade ores and wastes.

[Get Price]
LEACHING - CAID

LEACHING CAID provides corrosion resistant engineered systems and equipment for all mineral leaching applications; VAT, Primary Heap Leaching, ROM and Secondary Leaching. Our Leaching Solution Management experience flows from the Raffinate distribution all the way to the collection and delivery of Pregnant Leach Solution. BARGES BOOSTER STATIONS LEACH COLUMNS & VATS …

[Get Price]
From waste into wealth: sonic sampling and well ...

 · From waste into wealth: sonic sampling and well installation of gold heap leach pad. ... Heap leach pads are large piles of rock waste from a mine operation that receive further processing through a leaching solution to remove the mineral ore from the rock. The leaching solution is applied via an irrigation or sprinkler system to the top of the ...

[Get Price]
Wang Leiming - ResearchGate

To research the bioleaching law of secondary copper sulfide under different conditions of heap structure, this study selects coarse and fine particles and carry out indoor column leaching ...

[Get Price]
GOLD MINING AND HEAP LEACH on Vimeo

GOLD MINING AND HEAP LEACH. Waste rock is delivered to the Waste Rock Storage Areas while Ore is delivered to a Primary crusher – then via conveyors to Secondary and Tertiary crushesr for further reduction to a six-point-four millimeter size. The sized ore is then conveyed overland to a double-lined Heap Leach …

[Get Price]
HEAP LEACH PAD DESIGN AND CONSTRUCTION PRACTICES …

HEAP LEACH PAD DESIGN AND CONSTRUCTION PRACTICES IN THE 21 ST CENTURY By Allan J. Breitenbach, P.E., SME Member Vector Colorado LLC INTRODUCTION The mining industry has been using geomembrane liners for fill structures and ponds for more than 30

[Get Price]
Leaching of rare earths elements (REE) past and present

leaching technologies, both past and present, used in primary REE production. Bastnaesite Bastnaesite is a rare earth fluorocarbonate mineral1, RE(CO3)F, which primarily contains light rare earth elements. After physical upgrading, bastnaesite ore concentrates contain between 40 to 60% REE2.

[Get Price]
Application of alternative lixiviants for secondary heap ...

Some preliminary results on the secondary leaching of previously heap leached gold ore are presented. Alternative lixiviants for gold comprising chlorine, thiourea and thiosulphate were compared with cyanide using bottle roll tests. Chlorine was subsequently selected for column leaching tests. Column tests at 1.0, 0.1 and 0.01 gL Cl2 at pH 2 were conducted.

[Get Price]
Wang Leiming - ResearchGate

To research the bioleaching law of secondary copper sulfide under different conditions of heap structure, this study selects coarse and fine particles and carry out indoor column leaching ...

[Get Price]
Extraction of Copper at Elevated Feed Concentrations

compared with a heap leach operation, to attain the extraction desired. An SX-EW operation is an acid plant. It takes copper out of solution and replaces it with protons which make their way, via the organic extractant, back to the raffinate stream. In heap leach operations the acid is consumed during leaching. In a concentrate leach scenario,

[Get Price]
LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY …

LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY FOR „KRAKU ... Dump, heap and in-situ leaching are the ... oxidation zone, the zone of secondary sulphide enrichment or, so called cementation zone, transient and primary zone, as is illustrated in Table 2 [21, 22]. Table 2. ...

[Get Price]
Application of Alternative Lixiviants for Secondary Heap ...

Some preliminary results on the secondary leaching of previously heap leached gold ore are presented. Alternative lixiviants for gold comprising chlorine, thiourea and thiosulphate were compared with cyanide using bottle roll tests. Chlorine was subsequently selected for column leaching tests. Column tests at 1.0, 0.1 and 0.01 gL Cl2 at pH 2 were conducted.

[Get Price]
Copper extraction - Wikipedia

Secondary sulfides – those formed by supergene secondary enrichment – are resistant to sulfuric leaching. These ores are a mixture of copper carbonate, sulfate, phosphate, and oxide minerals and secondary sulfide minerals, dominantly chalcocite but other minerals such as digenite can be important in some deposits.

[Get Price]
(PDF) Process options in the treatment of a mixed ...

Heap leaching and B R I S A process. Carranza, F., Romero, R., Iglesias, N. and Palencia, I. Group of Biohydrometallurgy. University of Sevilla. 41071 Sevilla. Spain Two leaching systems have been investigated to recover copper from a mixed atacamite, secondary copper sulphides mineral: heap leaching and BRISA process.

[Get Price]
Application of Alternative Lixiviants for Secondary Heap ...

No furt her dist ribut ion is perm it t ed. Application of Alternative Lixiviants for Secondary Heap Leaching of Gold A Nikoloski1 and N Stockton2 ABSTRACT The potential of applying a secondary leach using a lixiviant other than cyanide was the subject of this Some preliminary results on the secondary leaching of study.

[Get Price]
HEAP LEACH FACILITY LINER DESIGN - geosynthetica.com

Heap leach facility liner system configurations vary depending on the type of leach facility (single-use pad, on-off, or valley leach), site conditions (topography, climate, construction materials), and ore type. In general, liner systems configurations can be described as

[Get Price]
Modelling the kinetics of chalcocite leaching in acidified ...

A specific application of seawater is for heap leaching of copper secondary sulfides, mainly chalcocite. Chloride, the major ion in seawater, has been shown to significantly affect the leaching kinetics of copper sulfide concentrates and ores (Watling et al., 2014). To ensure success of the copper heap leach process using seawater, it is ...

[Get Price]

Copyright © 2019 GMC Industry & Technology Group Co., Ltd. | sitemap