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Acid Leaching - Copper Ore Treatment Method

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 various units of equipment. The flowsheet contemplates a six to seven day leach-wash cycle with one tank being discharged and charged each day ...

Copper extraction - Wikipedia

Secondary sulfides – those formed by supergene secondary enrichment – are resistant (refractory) 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 froth flotation. A typical concentrate of chalc…

A STUDY OF LEACHING OF COPPER OXIDE ORE BY …

The leaching of dolomitic-copper ore using sulphuric acid under controlled conditions was studied with a view to evaluating the economic value and the effect of ore pulverisation, particle size ...

Leaching and recovery of zinc and copper from brass slag ...

Leaching and recovery processes for zinc and copper from brass slag by sulfuric acid were carried out and iron and aluminum were also precipitated as hydroxides in addition to silica gel. The factors affecting the performance and efficiency of the leaching processsuch as agitation rate, leaching time, acid concentration and temperature were separately investigated. The results obtained ...

Sulfuric Acid Leaching of Smelter Matte

Open Access The Leaching of Dolomitic-Copper Ore Using Sulphuric Acid Under Controlled Conditions Felix W. Ntengwe* Copperbelt University, School of Technology, Chemical Engineering Department, 4662 Jambo Drive, Riverside, Kitwe, Zambia Abstract: The leaching of dolomitic-copper ore using sulphuric acid under controlled conditions was studied with a view to evaluating the economic value …

Leaching of Copper from Cuprous Oxide in Aerated Sulfuric Acid

Leaching of Copper from Cuprous Oxide in Aerated Sulfuric Acid Ilhwan Park1, Kyoungkeun Yoo1,*, Richard Diaz 3Alorro2, Min-seuk Kim3 and Soo-kyung Kim 1Department of Energy & Resources Engineering, Korea Maritime and Ocean University, Busan 49112, South Korea 2Department of Mining Engineering and Metallurgical Engineering, Western Australian School of Mines (WASM), Curtin …

Heap leaching - Wikipedia

Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from ore using a series of chemical reactions that absorb specific minerals and re-separate them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the ...

(PDF) Leaching of copper oxide with different acid solutions

Leaching of copper oxide with different acid solutions Article (PDF Available) in Chemical Engineering Journal 152(2):503-508 · October 2009 with 18,053 Reads How we measure 'reads'

Heap leaching - Wikipedia

Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from ore using a series of chemical reactions that absorb specific minerals and re-separate them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the ...

Copper Mining and Extraction: Oxide Ores

The smelter for sulfide ores produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. A by-product of the smelting and converting furnaces is sulfuric acid. In what looks like a lucky coincidence, sulfuric acid is needed ...

Leaching Chalcopyrite Concentrate with Oxygen and …

Article Leaching Chalcopyrite Concentrate with Oxygen and Sulfuric Acid Using a Low-Pressure Reactor Josué Cháidez 1,*, José Parga 2, Jesús Valenzuela 3, Raúl Carrillo 4 and Isaías Almaguer 5 Metallurgical Processes, Servicios Especializados Peñoles S.A de C.V., Torreón 27300, México; [email protected] 2 Division of Graduate Studies and Research, Instituto Tecnológico de Saltillo ...

LEACHING KINETICS OF COPPER FROM CHALCOPYRITE …

Sulfuric acid processing with the addition of a small amount of nitrogen species has been employed for a long time in some industrial applications. The first patented commercial process by Sunshine Precious Metals (Idaho, USA) used a sulfuric and dilute nitric acid mixture to leach silver- and copper-bearing ores (Caldon, 1978).

Sulphuric acid leaching of zinc and copper from Nigerian ...

sulphuric acid for the leaching of zinc and copper in the presence of hydrogen peroxide, considering influencing parameters such as concentration of hydrogen peroxide, leaching time, particle diameter and stirring speed. Experimental mode Materials The complex sulphide ore used in this study was obtained from Ishiagu in Eboyin State, South Eastern region of Nigeria. Detailed characterization ...

Does sulfuric acid react with copper? - Quora

Copper does not react with dilute sulphuric acid as its reduction potential is higher than that of hydrogen. Copper does not displace hydrogen from non-oxidising acids like HCl or dilute H2SO4. But, concentrated sulphuric acid is an oxidising agen...

LEACHING OF A Cu-CoORE FROM CONGO USING SULPHURIC ACID …

LEACHING OF A Cu-CoORE FROM CONGO USING SULPHURIC ACID-HYDROGEN PEROXIDE LEACHANTS S.Y. Seoa, W.S. Choia, M.J. Kima, T. Trana,* a Department of Energy & Resources Engineering, Chonnam National University, Gwangju, Korea (Received 03 January 2012; accepted 28 June 2012) Abstract

Acid leaching | industrial process | Britannica

Other articles where Acid leaching is discussed: uranium processing: Leaching: Acid leaching is commonly performed by agitating an ore-leach mixture for 4 to as long as 48 hours at ambient temperature. Except in special circumstances, sulfuric acid is the leachant used; it is supplied in amounts sufficient to obtain a final leach liquor at about…

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. The leach solution is mixed vigorously with a ...

LEACHING OF METALS FROM WASTE PRINTED CIRCUIT BOARDS ...

Copper leaching was increased for sulfuric acid concentrations up to 1.2 mol/L and hydrogen peroxide concentrations of 10.0 vol% for a pulp density of 100 g/L at 50°C over 4 h, whereas for the same concentrations of sulfuric acid and hydrogen peroxide copper leaching was decreased from 75.7 to 56.7% with an increase in pulp density from 25 to 125 g/L. Under the same optimum conditions and a ...

A simple kinetic model for sulfuric acid leaching of ...

A simple kinetic model for sulfuric acid leaching of copper from chrysocolla. P-C. Hsu 1 & L. E. Murr 1 nAff2 Metallurgical Transactions B volume 6, pages 435 – 440 (1975)Cite this article. 234 Accesses. 6 Citations. Metrics details. Abstract. Experimental results obtained in room temperature laboratory leaching studies of lowgrade chrysocolla are interpreted by a kinetic equation of the ...

A review of chloride assisted copper sulfide leaching by ...

A review of chloride assisted copper sulfide leaching by oxygenated sulfuric acid and mechanistic considerations G. Senanayake PII: S0304-386X(09)00050-4 DOI: doi: 10.1016/j.hydromet.2009.02.010 Reference: HYDROM 2961 To appear in: Hydrometallurgy Received date: 27 June 2008 Revised date: 19 February2009 Accepted date: 20 February2009 Please cite this article as: Senanayake, G., A …

Process development for recovery of copper and precious ...

More than 99% of copper content was dissolved by using two consecutive sulfuric acid leaching steps in the presence of H2O2 as oxidizing agents. The solid residue of 2nd leaching step was treated by acidic thiourea in the presence of ferric iron as oxidizing agent and 85.76% Au and 71.36% Ag dissolution was achieved. The precipitation of Au and Ag from acidic thiourea leachate was investigated ...

Does sulfuric acid react with copper? - Quora

Copper does not react with dilute sulphuric acid as its reduction potential is higher than that of hydrogen. Copper does not displace hydrogen from non-oxidising acids like HCl or dilute H2SO4. But, concentrated sulphuric acid is an oxidising agen...

LEACHING OF METALS FROM WASTE PRINTED CIRCUIT BOARDS ...

Copper leaching was increased for sulfuric acid concentrations up to 1.2 mol/L and hydrogen peroxide concentrations of 10.0 vol% for a pulp density of 100 g/L at 50°C over 4 h, whereas for the same concentrations of sulfuric acid and hydrogen peroxide copper leaching was decreased from 75.7 to 56.7% with an increase in pulp density from 25 to 125 g/L. Under the same optimum conditions and a ...

Acid leaching | industrial process | Britannica

Other articles where Acid leaching is discussed: uranium processing: Leaching: Acid leaching is commonly performed by agitating an ore-leach mixture for 4 to as long as 48 hours at ambient temperature. Except in special circumstances, sulfuric acid is the leachant used; it is supplied in amounts sufficient to obtain a final leach liquor at about…

Sulfuric acid leaching of sulfide slag of Sarcheshmeh ...

12 Sulfuric acid leaching of sulfide slag of Sarcheshmeh copper reverberatory furnace Hossein Aghajania,*, Jalil Vahdati Khakib, Masoud Goudarzic, Naser Hosseinia a Materials Engineering Department, University of Tabriz, Tabriz, Iran. b Department of Metallurgy and Materials Engineering, Ferdowsi University of Mashhad, Mashhad, Iran. c School of Metallurgy and Materials Engineering, …

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. From the remaining copper in the leach residue, 66% was extracted at the cyanidation stage, causing high cyanide consumption. Thus, it can be concluded that ...

Environmental Impact of Sulfuric Acid Leaching

Sulfuric acid, the leaching agent, is brought on site in large tankers. The sulfuric acid is diluted and sprayed or dripped over oxide ore, which dissolves the oxidized minerals completely in the solution. The solution, “pregnant” with the dissolved metals, is then piped to the SX-EW plant that separates out the copper into 99% pure bars. The copper is ready with no need for smelting. The ...

Copper Mining and Processing: Processing of 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 concentrations of between 60-70%. The second step is ...