Heap Leaching Copper By Sulfuric Acid

Heap Leaching Copper By Sulfuric Acid

Sulfuric acid injection in copper heap leaching LEWA

The leaching reagent (dilute sulfuric acid) is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap, where it dissolves the copper from the ore. The resulting solution of sulfuric acid and copper sulfate is collected in a small pool. Copper concentration is around 65%. Next step is solvent extraction.

More

HEAP LEACHING Technology options and innovation for

2021-3-2  Heap leaching with sulfuric acid is only able to efficiently recover Cu from certain species of minerals. Table 1 which is based on conventional heap leaching could now be considered out-dated, particularly for copper sulfides. The introduction of new bacteria, higher temperatures and forced aeration can enhance sulfide

More

Improvements in Copper heap leaching by use of wetting

2013-10-14  Improvements in Copper heap leaching by use of wetting agents Proceedings of EMC 2009 3 A sprinkler system is installed on top of each heap allowing the diluted sulfuric acid to be fed uni-formly over the ore. While the solution percolates through the heap, copper is leached out of the ore.

More

Experimental study of sulfuric acid effects on hydro ...

2018-3-1  To study the effects of leaching by sulfuric acid on internal friction angle of copper oxide ore samples, the direct shear tests (ASTM D3080) were carried out at different leaching durations. Two sets of direct shear tests were performed using the leached samples of the Meydouk and Sarcheshmeh mines of Kerman province of Iran.

More

Acid Leachability Copper Species - 911 Metallurgist

2016-8-11  and heap-leaching conditions, have demonstrated their dissolution behavior and provide the metallurgical basis for development and application of the sequential copper analysis method. Under these conditions, it has been found that sulfuric acid leaching is generally quite successful in recovering

More

Acid leaching of copper ore heap with fluoroaliphatic ...

Briefly, the present invention provides, in one aspect, an improved method for aqueous acid leaching of copper values from a heap of low grade copper oxide ore, comprising: contacting, for example by spraying, with dilute aqueous sulfuric acid a heap of low-grade copper oxide ore (which is optionally pretreated with strong aqueous sulfuric acid ...

More

STUDIES ON THE CURING AND LEACHING KINETICS OF

2017-5-27  existing mathematical models of heap leaching. Sulfuric acid curing is a pretreatment to accelerate the extraction kinetics of copper ores and is widely used in copper operations. The curing process involves the addition of a highly concentrated sulfuric acid to the copper ore during agglomeration. Then, chemical reactions already begin prior to

More

Enhancement of copper recovery by acid leaching of

2018-11-20  Sarcheshmeh Copper Mine uses the sulfuric acid solution to extract copper from oxide ores in Iran (Shayestehfar et al., 2008), similarly, malachite-atacamite ore of Disele Copper Mine is rich in high-content of silca gangues and SiO 2, the sulfuric acid solution is used to extract valuable metal and main parameters such as particle size ...

More

Acid Leaching - Copper Ore Treatment Method

2017-5-23  The flowsheet discussed in this study is for treatment of 100 tons per day oxide-sulfide copper ore by the leaching process using sulfuric acid-ferric sulfate solvent. This flowsheet would also be suitable for a larger tonnage by proper sizing of the

More

Acid curing and agglomeration for heap leaching ...

2017-1-1  1. Introduction. Acid curing and agglomeration are generally used prior to heap leaching of copper oxide and secondary sulfide ores to improve the copper extraction process. Agglomeration is used to bind fine particles to coarse ones to increases the permeability of an ore heap while acid curing inhibits the dissolution of some silicates and ...

More

LEACHING OF LOW-GRADE COPPER ORES: A CASE

2017-6-9  leaching methods. Agents for leaching copper can be acid, base, or salt solutions. Of all of these agents, sulphuric acid has been given the broadest industrial application in hydrometallurgy of copper. The basic copper carbonate minerals, which are easily leached with the solution of sulphuric acid are: azurite, malachite and chrysocolla.

More

Copper Leaching Practices

2021-2-5  Leaching Operation. The overall heap leaching operation is similar in many respects to that of dump leaching, with a few exceptions. More concentrated sulfuric acid solutions are used in heap leaching because of the acid strength necessary for dissolution of the copper oxide minerals.

More

copper leaching with sulphuric acid

Heap Leaching Mining Techniques Metals Mining Copper. Sulfuric acid heap leaching of nickel The technique is an acid heap leaching process like that of the copper method in that it uses sulfuric acid instead of cyanide solution to liquefy the target minerals from crushed ore...

More

The acidic ferric sulfate leaching of primary copper ...

The main method for extraction of copper from chalcopyrite is by flotation concentration before being smelted and electro-refined. However, this process is not suitable for the treatment of the vast reserves of low grade chalcopyrite ores, where hydrometallurgical extraction through heap leaching is a better option.

More

Sulfuric acid injection in copper heap leaching LEWA

The leaching reagent (dilute sulfuric acid) is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap, where it dissolves the copper from the ore. The resulting solution of sulfuric acid and copper sulfate is collected in a small pool. Copper concentration is around 65%. Next step is solvent extraction.

More

HEAP LEACHING Technology options and innovation for

2021-3-2  Heap leaching with sulfuric acid is only able to efficiently recover Cu from certain species of minerals. Table 1 which is based on conventional heap leaching could now be considered out-dated, particularly for copper sulfides. The introduction of new bacteria, higher temperatures and forced aeration can enhance sulfide

More

copper leaching with sulphuric acid

Heap Leaching Mining Techniques Metals Mining Copper. Sulfuric acid heap leaching of nickel The technique is an acid heap leaching process like that of the copper method in that it uses sulfuric acid instead of cyanide solution to liquefy the target minerals from crushed ore...

More

Acid generation by in-situ sulphur biooxidation for

At Barrick’s Zaldívar copper mine in Chile, the addition of sulfuric acid to the ore going to heap leaching is a major expense. A process in which a portion of this acid is replaced by ...

More

STUDIES ON THE CURING AND LEACHING KINETICS OF

2017-5-27  existing mathematical models of heap leaching. Sulfuric acid curing is a pretreatment to accelerate the extraction kinetics of copper ores and is widely used in copper operations. The curing process involves the addition of a highly concentrated sulfuric acid to the copper ore during agglomeration. Then, chemical reactions already begin prior to

More

Acid leaching of copper ore heap with fluoroaliphatic ...

Briefly, the present invention provides, in one aspect, an improved method for aqueous acid leaching of copper values from a heap of low grade copper oxide ore, comprising: contacting, for example by spraying, with dilute aqueous sulfuric acid a heap of low-grade copper oxide ore (which is optionally pretreated with strong aqueous sulfuric acid ...

More

Copper Leaching Practices

2021-2-5  Leaching Operation. The overall heap leaching operation is similar in many respects to that of dump leaching, with a few exceptions. More concentrated sulfuric acid solutions are used in heap leaching because of the acid strength necessary for dissolution of the copper oxide minerals.

More

Acid Leaching - Copper Ore Treatment Method

2017-5-23  The flowsheet discussed in this study is for treatment of 100 tons per day oxide-sulfide copper ore by the leaching process using sulfuric acid-ferric sulfate solvent. This flowsheet would also be suitable for a larger tonnage by proper sizing of the

More

Leaching of iron from copper tailings by sulfuric acid ...

Sulfuric acid concentration and temperature both have a significant effect on leaching process. When the sulfuric acid concentration reached 0.53 mol L −1, FeO from Fe 3 O 4 was slightly decomposed. 25 However, an excess of sulfuric acid would destroy the leaching system due to the rapid formation of H 4 SiO 4 by the quick dissolution of Fe 2 ...

More

Leaching of iron from copper tailings by sulfuric acid ...

the leaching behaviors of iron can promote the utilization of copper tailings. In this study, the kinetics and mechanism of the leaching of iron from copper tailings using sulfuric acid were studied. Under optimal conditions (40 C, sulfuric acid concentration of 0.53 mol L 1, stirring speed of 400 rpm,

More

Agglomeration and leaching behaviors of copper oxides

2021-7-1  Keywords: agglomeration; binder; acid leaching; copper oxide; sulfuric acid solution 1. Introduction Compared with traditional pyrometallurgy practices, heap leaching is a more environmentally friendly, lower-cost, and effective method in the hydrometallurgical operations in- volving copper, gold, and uranium [1–3] in the United States, ...

More

Copper Mining and Processing: Processing Copper

The leaching reagent (dilute sulfuric acid) is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap, where it dissolves the copper from the ore. The resulting “pregnant” leach solution of sulfuric acid and copper sulfate is collected in a small pool. The copper compound can now be seen at ...

More

Accelerating Copper Leaching from Sulfide Ores in

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 to evaluate different variables, namely the addition of nitrate as NaNO3 (11.7 and 23.3 kg/ton), chloride as NaCl (2.1 and 19.8 kg/ton), curing time (20 and 30 days) and ...

More

Acid curing and agglomeration for heap leaching

Copper extraction close to 98% were obtained with three days of leaching at 70 • C in a seawater medium, with a high concentration of nitrate and acid (1 M), and an 80% extraction was obtained ...

More

Sulfuric acid injection in copper heap leaching LEWA

The leaching reagent (dilute sulfuric acid) is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap, where it dissolves the copper from the ore. The resulting solution of sulfuric acid and copper sulfate is collected in a small pool. Copper concentration is around 65%. Next step is solvent extraction.

More

HEAP LEACHING Technology options and innovation for

2021-3-2  Heap leaching with sulfuric acid is only able to efficiently recover Cu from certain species of minerals. Table 1 which is based on conventional heap leaching could now be considered out-dated, particularly for copper sulfides. The introduction of new bacteria, higher temperatures and forced aeration can enhance sulfide

More

US5207996A - Acid leaching of copper ore heap with ...

Improved methods of heap leaching of copper ore with aqueous sulfuric acid solutions comprising a fluoroaliphatic surfactant are disclosed. The fluoroaliphatic surfactant increases the amount of copper values leached and recovered.

More

Effects of adding acid plant sulfur on heap leaching

2017-1-12  ore deposits. Copper ore deposits are found across the world and heap leaching of copper has been implemented effectively for years. The ore is broken down to copper ions and elemental sulfur in the heap. Acid plants are used in mines to replenish the raffinate leaching the heaps which consists of sulfuric acid.

More

Acid generation by in-situ sulphur biooxidation for

At Barrick’s Zaldívar copper mine in Chile, the addition of sulfuric acid to the ore going to heap leaching is a major expense. A process in which a portion of this acid is replaced by ...

More

LEACHING OF A Cu-CoORE FROM CONGO USING

2013-7-23  oxidised copper (2-4% Cu) and cobalt (1-3% Co) [1,2]. The lack of response of Cu-Co oxide minerals during flotation [3] implies that heap or vat leaching should be considered for these ores. In industrial heap or vat operations, sulphuric acid is commonly used to leach copper from oxide minerals such as malachite (CuCO 3.Cu(OH) 2), azurite ...

More

Copper Mining and Processing: Processing Copper

The leaching reagent (dilute sulfuric acid) is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap, where it dissolves the copper from the ore. The resulting “pregnant” leach solution of sulfuric acid and copper sulfate is collected in a small pool. The copper compound can now be seen at ...

More

Bacterial and chemical leaching of copper-containing

2019-1-25  Copper leaching was carried out by acidophilic bioleaching for comparison with extraction by chemical methods involving the addition of sulfuric acid and Fe 3+ or only sulfuric acid in flasks, as well as column leaching tests to simulate heap leaching. Ag was extracted by cyanidation methods again in flasks as well as column leaching tests.

More

Intensification of Sulfuric Acid Leaching of Copper

2020-3-29  The metals pass into the sulfuric acid solution with the consumption of ozone to dissolve 1 t of sphalerite, pyrite, and chalcopyrite, being 2.2, 3.4, and 2.4 t, respectively. In , technology is described for ozone-assisted leaching of copper from copper sulfide concentrates successfully trialed in the 1980s at Alaverdi Mining and Smelting Works.

More

Optimization of sulfuric acid leaching of roasted ...

2020-8-26  In many studies in the literature, sulfuric acid and hydrochloric acid are the most preferred for leaching in acidic environments [32,33,34,35,36]. It is stated in the literature that the consumption of sulfuric acid, which is the cheapest solvent for leaching of oxidized copper

More

Evaluation of stucco binder for agglomeration in the heap ...

2020-1-19  In copper heap leaching, sulfuric acid solution is frequently used to bind the particles together by a liquid bridge, and is thought to react to with gangue minerals to render them amorphous and to inhibit silica dissolution. Curing refers to acidic reactions between gangue mineral

More

Heap Leaching Mining Techniques, Metals Mining,

2021-7-15  Sulfuric acid heap leaching of nickel. The technique is an acid heap leaching process like that of the copper method in that it uses sulfuric acid instead of cyanide solution to liquefy the target minerals from crushed ore. The process has been urbanized by European Nickel PLC for the rock laterite deposits of Turkey and the Balkans.

More

Experimental study of sulfuric acid effects on hydro ...

The effects of sulfuric acid flow on the hydro-me- chanical properties of oxide copper heap soils could enhance the accuracy of slope stability design and drainage layers design in industrial ...

More

Heap Leaching of Copper from the Ores of

Heap leaching of oxidized, complex, and waste copper ores of the Volkovskoe deposit is considered. Based on the results of an investigation, the preliminary granulation of milled ore with sulfuric ...

More