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

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, solid/liquid ratio of 1 : 10 and leaching …

Copper extraction - Wikipedia

Sulfide ores. 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.. Supergene ores rich in sulfides may be concentrated using ...

Copper Mining and Processing: Processing Copper Ores ...

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 ...

Sulfuric acid leaching for capturing value from copper ...

Sulfuric acid leaching of copper rich slag with the optimized parameters can provide a copper rich process solution with iron as the main impurity metal. The solution can provide an attractive feed for integration into the industrial primary copper production with acceptable low Ni, As and Pb levels (43.6 g/L Cu, 9.4 g/L Fe, 0.3 g/L Ni, 0.1 g/L ...

A STUDY OF LEACHING OF COPPER OXIDE ORE BY SULPHURIC ACID

sulphuric acid solution was used and 5 g of the ground copper oxide ore with a solid to liquid. ratio of 13%. Leaching parameters such as leaching time from 0.25 – 4 h, pH range 0.5 – 4 ...

Copper leaching from chalcopyrite concentrate by sodium ...

of the copper leaching process can save human labour and time. Leaching of copper from chalcopyrite concentrate using sulphuric acid and sodium nitrate as an oxidant was tested, and the influence of temperature, particle size, stirring speed and concentrations of sulphuric acid …

Leaching of copper(I) sulphide by sulphuric acid solution ...

This paper aims to investigate the leaching process of copper(I) sulphide by sulphuric acid solution in the presence of sodium nitrate as it has not been studied sufficiently either from the theoretical or practical point of view. 2. Chemical reaction and thermodynamics

Agitated Copper Leaching & Cementation Process

The Copper Leaching and Copper Cementation Process. The method of dissolution by sulfuric acid and ferric sulfate with chemical precipitation by means of scrap or sponge iron appears to offer the best potential for wide application and low costs.

SOLVENT EXTRACTION IN HYDROMETALLURGICAL …

using hydrometallurgical methods (non-oxidative and atmospheric leaching) in order to recover copper and accompanying metals. Non-oxidative leaching is a fast, selective and easy controllable process. Atmospheric leaching with sulphuric acid was found to be surprisingly efficient for copper, zinc and cobalt recovery from the by-

NICICo - Sarcheshmeh - Sulphuric Acid

In 1972 (1351H.), Sarcheshmeh Copper Mines Joint Stock Co of Kerman was established; and, later, in 1976 (1355H.), it was renamed as National Iranian Copper Industries Co to involve all copper mines operations throughout the country. This company has numerous responsibilities to do including extraction and utilization of copper mines ...

Question Video: Reaction of Sulfuric Acid with Cupric ...

Question Video: Reaction of Sulfuric Acid with Cupric Oxide. Ores containing cupric oxide (CuO) are commonly reacted with sulfuric acid to produce a copper-containing material that is more easily processed. This process is known as sulfuric acid leaching. a) Write a balanced chemical equation for the reaction of cupric oxide with sulfuric acid.

Optimization of sulfuric acid leaching of roasted ...

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 ores [ 37 ], varies between 0.4 and 0.7 tons H 2 SO 4 per ton of ...

1 s2.0 S0959652620337501 Main | PDF | Mining | Copper

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Leaching of copper(I) sulphide by sulphuric acid solution ...

Finely grained samples of copper(I) sulphide were leached by H2SO4 solution with added NaNO3. The occurrence probability of chemical reactions was analysed based on literature data and products which were formed during the process and the overall leaching reaction was defined.

Leaching of Cu, Zn, and Pb from Sulfidic Tailings Under ...

In this study, the extraction of copper, zinc, and lead from sulfidic tailing in sulfate–chloride media was investigated. A 33 Box–Behnken design was applied to evaluate three variables over a 4-h testing period: sulfuric acid concentration (0.01–1.0 mol/L H2SO4), sodium chloride (10–60 g/L NaCl), and temperature (20–70 °C).

LEACHING OF A Cu-CoORE FROM CONGO USING …

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 (2CuCO 3.Cu(OH) 2) and chrysocolla (CuO.SiO 2.2H 2 O). Sulphuric acid was

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

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.

Copper recovery using leach/solvent extraction ...

In 1968 there were only two widely practiced copper leaching processes using dilute sulphuric acid. The first process, vat 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-

Copper Mining and Extraction Sulfide Ores

This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. For example: FeO(s) + SiO 2 (s)→ FeO.SiO 2 (slag) This is very similar to the removal of impurities in the blast furnace. The liquid left is a mixture of copper sulfides and iron sulfides.

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.

JP2014501849A - Copper oxide leaching method replacing ...

A copper oxide ore leaching method that does not utilize sulfuric acid, which comprises an aqueous solution of tricarboxylic acid mixed in water (the acidity in the mixture varies between pH 1.0 and 5.0). A step of impregnating the copper ore with an organic non-polluting leachate, a step of obtaining copper citrate, and optionally washing the impregnated copper ore again with an organic non ...

sulfuric acid usage in copper leaching | Page 2 | Gold ...

Sulfide ores will not leach unless you do bioleaching. So how much sulfuric acid you will need depends on the assay of the ore. The more calcium in the form of Lime and magnesium in the form of dolomite you have in the ore, the more acid you will need to neutralize these elements first and then dissolve the copper content.

A statistical approach to the experimental design of the ...

Sulfuric acid leaching did not provide more than 76% copper extraction because the only slightly native copper that was leached (23%). For this reason, the sulfuric acid leach residue still had 0.30% native copper and 0.52% total copper.

Sulfuric Acid - University of Arizona

Sulfuric acid (H 2 SO 4) is a strong acid. It is an odorless, clear to dark brown, oily liquid that is corrosive. Sulfuric acid has many industrial purposes and is produced in greater quantities than any other chemical worldwide. In metal mining, sulfuric acid is used to leach copper oxide minerals. In one process, a solution of sulfuric acid laden

Understanding Acid Consumption and Its Relationship with ...

Sulfuric acid (1.14 M made from reagent grade stock) was added at a rate of 40 microliters per minute using a syringe pump. The pH was monitored using a pH electrode throughout the course of leaching. Copper extraction was measured using a copper ion selective electrode. Data from the pH probe and copper ion selective electrode were recorded

Acid Leachability Copper Species - 911 Metallurgist

strengths of sulfuric acid solutions. Sloan (1934) has evaluated a number of different analytical methods employing sulfuric acid leaching. Several of these methods or variations of these methods are routinely used for oxide or acid soluble copper determinations at …

Acid Leaching - Copper Ore Treatment Method

COPPER LEACHING. The application of hydrometallurgical leaching to oxide and combined oxide and sulfide ores depends mainly on obtaining solvent at low cost and in holding initial plant costs within feasible limits. Dilute sulfuric acid-ferric sulfate has been found to be an excellent solvent for oxide minerals as well as for such sulfide forms ...

The Decomposition of Hydrogen Peroxide in Acidic Copper ...

Figure 5.18: The graph of the change in mass of copper sulfate with the estimated first order rate constant of the solution in which the mass of copper sulfate used was 0g, 5g, 8g, 11g, 15g and 20g in 1.0M of sulfuric acid at an initial temperature of 67 C and with 30ml of

Leaching of Metals from Hydrometallurgical Residue by ...

leaching in (0.25, 0.5, 1 and 2 (mol.L-1)) sulfuric acid solutions. The subsequent leaching was performed in the optimized acid concentrations at temperatures of (25, 45, 65 and 85 °C) for (0.5, 1, 1.5 and 2 hour) at each temperature. A variable speed stirrer operated at a speed of 100rpm was maintained during in all leaching experiments at 1MPa.

Separation of Copper from Chalcopyrite – Ammoniacal Leach ...

Q. 25 (3) 309–316 (2011) 315 Recovery of copper from the leach liquor The recovery/separation of copper from the leach liquor was conducted at various optimised conditions: 950 mL min–1 flow rate, pH of 3.0, LIX84I concentration of 1.5 mol L–1, and acid con- centration of 950 mol m–3 in the strip solution.