Copper recovery using leach/solvent extraction
copper L/SX/EW operation, the Bluebird plan of Ranchers Exploration and Development Corporation, came on line1. Copper recovery by L/SX/EX in 1968 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
leaching copper acid
Copper Mining and Extraction Oxide Ores. Leaching Oxide Ores with Sulfuric Acid. After solvent extraction using organic solvents, the copper ions are stripped from the solution with a strong acid and leave a blue solution with a high copper content.This is called the rich electrolyte.
Producing Copper Nature's Way: Bioleaching
Ferric sulfate, which is a powerful oxidizing agent, then oxidizes the copper sulfide minerals and the copper contained is then leached by the sulfuric acid formed. In the case of uranium, the ferric sulfate oxidizes tetravalent uranium oxide, which is insoluble in acid, to hexavalent uranium oxide, which is then leached by the sulfuric acid.
How Does Acid Affect Copper?
Strong acids include nitric acid, sulfuric acid, hydrochloric acid and phosphoric acid. The ability of an acid to oxidize metals determines its effect on copper. Hydrochloric and phosphoric acid don't oxidize metals well and won't dissolve copper. Sulfuric acid has a medium
Sulfuric acid injection in copper heap leaching
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.
Sulfuric acid leaching of sulfide slag of Sarcheshmeh
leaching causes an increase in extraction of copper. In recent years, various solvents such as chlorate , ferric chloride , hydrochloric acid , hydrogen peroxide , and sulfuric acid  have been used for leaching of copper from slags. Sulfuric acid leaching is the most conventional method for extraction of copper because of its
Some Studies on Sulfuric Acid Leaching of Anode Slime with
Nov 13, 2002The process involved the leaching of anode slime in sulfuric acid medium. At room temperature, sulfuric acid leaching without any additive resulted in poor recoveries of metals other than copper. With the addition of MnO2 to the leaching system at room temperature, an increase in the recovery values of copper, selenium, and tellurium was found.
Leaching Chalcopyrite Concentrate with Oxygen and Sulfuric
The mass balance showed that 98% of copper was extracted from the chalcopyrite concentrate in 3 h under the following experimental conditions: 130 g/L of initial sulfuric acid concentration, temperature of 100 C, oxygen pressure of 1 kg/cm2, solid concentration of 100 g/L and particle size of −105 + 75 μm.
Sulfuric Acid-Oxygen Leaching for In-Situ Extraction of Copper Chalcopyrite. Hydrometallurgical treatment of chalcopyrite by sulfuric acid based systems for primary recovery of copper is limited by the refractory nature of the mineral (Bartlett, 1973; Gerlach et al, 1973; Vizsolyi et al, 1967).
How to Make copper sulfate from copper and sulfuric acid
Copper does not directly react with sulfuric acid so some form of oxidant is needed. Hydrogen peroxide and nitric acid are excellent oxidants and the first two methods demonstrate this. The nitric acid method however produces toxic nitrogen dioxide gas so you'll need to perform this one outside or in a fumehood.
Sulphuric acid leaching of zinc and copper from Nigerian
As a means of optimizing sulphuric acid leaching, there is the possibility of aiding its dissolution kinetics or oxidation through the use of hydrogen peroxide. Hydrogen peroxide is a strong oxidizing agent and promotes the oxidation and leaching potential of sulphuric acid. Besides its high oxidizing potential, it is easier to handle than gaseous oxidants.
Leaching of Copper from Cuprous Oxide in Aerated Sulfuric
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 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. The process has been urbanized by European Nickel PLC for the rock laterite deposits of Turkey and the Balkans.
Mechanochemical leaching of chalcopyrite concentrate by
Mechanical activation was employed during the leaching (mechanochemical leaching) of chalcopyrite concentrates in a sulfuric acid medium at room temperature and atmospheric pressure. High energy ball milling process was used during the leaching to provide the mechanochemical leaching condition, and atomic absorption spectroscopy and cyclic voltammetry were used to determine the leaching behavior
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).
sulfuric acid copper leaching
Sulfuric-acid leaching was used to extract metals from an arsenic- containing flue dust waste material Temperature, percent solids, and acid concentration were the leach parameters examined in this US Bureau of Mines study Arsenic, cadmium, copper, and zinc were soluble under all leach .
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.
Leaching Sulfides by Sulphuric Acid: Copper
The sulphate of silver is soluble in strong sulphuric acid, but the anhydrous sulphate of copper is practically insoluble. Owing to the large percentage of copper in the sulphides a large quantity of insoluble sulphate is produced, and this is one of the most serious difficulties of the process.
A comprehensive study of the leaching behavior and
ing process of copper oxidized ores, sulfuric acid leach-ing is viewed as the most viable and versatile process. The most common copper oxide minerals, such as azu-rite (Cu3(OH)2(CO3)2), malachite (Cu2(OH)2CO3), and copper oxide (CuO), can be dissolved by sulphuric acid according to the reactions given below : Cu3(OH)2(CO3)2+3H2SO4!3CuSO4+2CO2
A process for recovering nickel and cobalt values from nickel- and cobalt-containing laterite ores as an enriched mixed nickel and cobalt sulphide intermediate and for producing nickel and cobalt metal from the nickel and cobalt sulphide intermediate. The laterite ore is leached as a slurry in a pressure acid leach containing an excess of aqueous sulphuric acid at high pressure and temperature
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.
Leaching of Primary Copper Sulfide Ore in Chloride
Many chalcopyrite leaching studies have been performed with leachants such as ferric sulfate [4–7], ferric chloride [7,8], sodium nitrate-sulfuric acid , hydrochloric acid , and sodium chloride-sulfuric acid , among others . The slow copper from chalcopyrite dissolution has been attributed to
Oxidation Sulfuric Acid Autoclave Leaching of Copper
Results are provided for sulfuric acid autoclave leaching of OAO SUMZ dust and dust obtained after recovery melting, containing alongside copper and zinc considerable amounts of lead and arsenic. The effect of temperature and acid concentration on autoclave leaching indices is studied.
Acidity as a factor in leaching of copper, chromium and
ing was found to be higher in citric acid than in dilute sulfuric acid solutions. Leaching of copper, chromium and arsenic was not proportional to the amount of metal present before leaching. Keywords-CCA Leaching pH Treatedwood INTRODUCTION The protection of wood and wood products against attack from bacterial, fungal and insect de-
Sulfuric Acid Leaching of High
Jul 21, 2016This article discusses results obtained from the sulfuric acid leaching of dust that is left from reduction smelting at the Middle Ural Copper Smelter. In addition to copper and zinc, the dust contains substantial amounts of lead and arsenic (up to 30%). The computer program Statgraphics was used to plan experiments and analyze the results.
Leaching of metals from hydrometallurgical residue by
A direct leaching on the hydrometallurgical residue with sulfuric acid was developed in this work. The influence of leaching temperature, the leaching time, the particle size and the sulfuric acid concentration was examined. Results of leaching studies that the recovery extraction of Zn, Fe and Cu for hydrometallurgical residue increases with increasing acid concentration and temperature
Investigation on leaching of malachite by citric acid
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.
Improvements in Copper heap leaching by use of wetting
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.
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
Leaching of copper oxide with different acid solutions
Oct 15, 2009Comparison between acids showed that hydrochloric acid yields the highest CuO dissolution efficiency, followed by sulfuric acid, nitric acid and citric acid. Depending on the nature of the acid solution, the combination of aggressive character of anions which is in reality a beneficial effect in leaching process and the acidic character of H + seems to play an important role on the acceleration
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