Leaching Copper Ore

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Leaching Copper Ore

US6569391B1 - Heap leaching copper ore using sodium .

The heap leaching of copper bearing ores is improved by using sodium nitrate as an oxidizing chemical reactive in a sulphuric acid leaching solution. In particular, the ore is crushed to <6 mm and stored in heaps less than twelve meters high. The heaps are irrigated with a dilute solution consisting essentially of sulphuric acid and sodium nitrate to produce a leach product.

Properties of Copper Ores - The University of Arizona

Properties of Copper Ores The Problem Minerals from which copper can be extracted to make money are called copper ores. . found in the ore if this is possible. Leaching can be defined as the ability of a solvent (such as water or sulfuric acid) to dissolve precious metals from an ore body.

Agglomeration Drums in the Heap Leaching Process

Heap leaching, a process by which metals such as gold and copper are recovered from ore, has long been a method of choice in ore beneficiation, with applications growing all the time.. While this process has proven to be efficient, often chosen for its cost-effectiveness, the efficiency of the heap leaching process can be further improved through the addition of an agglomeration drum.

Copper Dump Leaching and Management Practices That .

Introduction Dump leaching refers to percolation leaching of copper from run-of-mine low-grade ores that have been piled on native ground. These dumps typically cover hundreds of acres and contain millions of tons of low-grade ore. The leaching cycle covers a span of many years.

Benefits of Agglomeration in an SX-EW Process for Copper .

Heap Leaching Copper Ore with Agglomeration. Crushed copper ore is first typically processed via heap leaching. An effective leaching step is critical to SX-EW, as it sets the stage for how much copper can be recovered. For this reason, the heap leaching step is commonly preceded by agglomeration of the ore in a rotary drum agglomerator.

Leaching - Mining Fundamentals

Leaching is a chemical process in mining for extracting valuable minerals from ore. Leaching also takes place in nature, where the rocks are dissolved by water. Post leaching, the rocks are left with a smaller proportion of minerals than they originally contained. The leaching process in mining is .

Bioleaching of a low grade nickel–copper–cobalt sulfide ore

The bioleaching behavior of copper and nickel from a low-grade nickel, copper, and cobalt-bearing sulfide ore was investigated. A recovery of 94% Ni, 62% Co and 70% Cu was achieved in 68 days of flask leaching including 18 days of acid pre-leaching and 50 days of bioleaching.

Heap Leach: Mining's breakthrough technology – MINING.COM

Aug 20, 2015 · Amid turmoil on commodity markets and a relentless drive by mining companies to increase efficiencies, heap leaching has emerged as a breakthrough technology experiencing stunning growth over the .

Acid leaching of oxide–sulfide copper ore prior the .

453 Acid leaching of oxide–sulfide copper ore prior the flotation – A way for an increased metal recovery Miroslav D. Sokić1, Vladan D. Milošević1, Velizar D. Stanković2, Vladislav Lj.Matković1, Branislav R. Marković1 1Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia 2University of Belgrade, Technical Faculty, Bor, Serbia

Investigation on leaching of malachite by citric acid .

Abstract. Leaching of an oxidized copper ore containing malachite, as a new approach, was investigated by an organic reagent, citric acid. Sulfuric acid is the most common reagent in the leaching of oxide copper ores, but it has several side effects such as severe adverse impact on the environment.

Copper Mining and Extraction: Sulfide Ores

Ores near the surface can be quarried after removal of the surface layers. The ore is treated with dilute sulfuric acid. This trickles slowly through the ore dissolving copper to form copper sulfate. The copper is recovered by electrolytic refining. Advantages of this process are: See for further information on the leaching process.

LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY .

The changes in copper content in the ore with the time of exploitation at the RTB mines [9] Oxide copper ore, mixed oxide-sulphide ores and low-grade copper sulphide ore, which, for economic reasons, cannot be enriched by flotation, may be processed by leaching methods. Agents for leaching copper

Cu Leaching Using Regenerated Ferric Sulphate - sgs

LEACHING OF SECONDARY COPPER MINERALS USING . REGENERATED FERRIC SULPHATE. C.J. FERRON — SGS. ABSTRACT . . Concentrate C was an ore containing copper mostly as covellite, with minor chalcopyrite and enargite. The gangue was composed primarily of quartz and pyrite. 2.

(PDF) A STUDY OF LEACHING OF COPPER OXIDE ORE BY SULPHURIC .

Mexican copper ore is a mixed ore containing mainly copper oxide and some copper sulfide that responds well to flotation. The joint techniques of flotation and leaching were studied.

Leaching in Metallurgy and Metal Recovery - emewCorporation

Jul 10, 2017 · Usually, this method is used on low grade ores that cannot be economically processed via other means. Heap leaching is successfully used to extract gold, silver, copper, nickel, and uranium. The largest heap leach for gold is at the Yanacocha mine in Peru, second only to Veladero in Argentina.

Leaching reagents / Applications / Home - Pionera

Sulphur formation on the ore particles can interfere with the extraction process and result in decreased metal recoveries. Gold leaching Autoclave leaching Atmospheric leaching . The recovery of gold, copper, nickel, zinc and other metals can be increased through the use of our PIONERA BioPolymer. Obtain additional benefits of using PIONERA .

8 Microbial Leaching of Metals - Wiley-VCH

recovery of copper that are based on the leach-ing of copper-containing ores (SCHIFFNER, 1977). A woodcut from his book illustrates the (manual) transport of metal-containing leachates from mines and their evaporation in . How-8 Microbial Leaching of Metals-2 4 4 (1)] .

Copper Ore Types: Sulfides vs. Oxides | Investing News Network

As with oxide ores, SX-EW tech is used to recover copper from a pregnant leach solution. Secondary sulfides, which are formed by supergene secondary enrichment, are resistant to sulfuric leaching .

copper processing | Definition, History, & Facts .

Copper processing: Copper processing, the extraction of copper from its ores and the preparation of copper metal or chemical compounds for use in various products. . the ore needs to be crushed and ground only to the extent required to expose the surface of the minerals to the leaching agent. For sulfide ores.

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.

HEAP LEACHING TECHNIQUE in MINING - Euromines

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 heap leaching, which has a relatively low level of energy consumption, is for example

Copper heap leach development – not as easy as it looks .

Aug 04, 2016 · 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.

HEAP LEACHING TECHNIQUE in MINING - Euromines

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 heap leaching, which has a relatively low level of energy consumption, is for example

Recovery of Copper by Solution Mining Methods - AZ

2 Recovery of Copper by Solution Mining Methods Solution mining replicates the natural process of oxidation and reduction, described above. Dilute acidic solutions are introduced to the copper-bearing ores, causing dissolution of soluble copper minerals (Table 1) remaining in the leached cap and underlying enrichment blanket.

Copper recovery using leach/solvent extraction .

leaching of high-grade copper oxide ore followed by EW of copper from the leach solution, produced low quality copper cathode at relatively high cost. In 1968 the tonnage of high-grade oxide ores was decreasing and vat leaching was on the decline. The second process, heap and dump leaching of low-

Agglomeration technique improves heap leaching process

Jul 05, 2018 · Heap leaching relies on a leaching agent moving through a bed of heaped ore to extract the metallic components: Crushed ore is stacked on a leaching pad and irrigated with the leaching agent. The leaching agent chemically reacts with the metal in the ore to dissolve the copper into the solution as it percolates through the heap.

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.

Chapter 6 Copper Production Technology - Princeton .

Chapter 6 Copper Production Technology The last boomin technological innovation for the copper industry occurred in the first two dec-ades of this century, whenopen pit mining, flo- tation concentration,and the reverberatory smelter were adapted to porphyry copper ores. With the exception of leaching-solvent extrac-

Copper Dump Leaching and Management Practices That .

Introduction Dump leaching refers to percolation leaching of copper from run-of-mine low-grade ores that have been piled on native ground. These dumps typically cover hundreds of acres and contain millions of tons of low-grade ore. The leaching cycle covers a span of many years.

Leaching | Article about leaching by The Free Dictionary

Leaching is accomplished by agitating fine solid material with a liquid solvent in contact with a gaseous reagent such as air (for the leaching of gold and uranium ores and sulfide concentrates), percolating the liquid reagent through a motionless layer of the solid (the leaching of copper from oxidized ores and of aluminates from caked bauxites).