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Sulfuric Acid Copper Leaching

  • Improvement of Copper Metal Leaching in Sulfuric Acid

    Improvement of Copper Metal Leaching in Sulfuric Acid

    A new concept for copper (Cu) metal leaching by the simultaneous use of cupric ions (Cu2) and oxygen (O2) was proposed to improve Cu metal leaching in sulfuric acid. According to this concept, Cu2 oxidizes Cu metal into cuprous ion (Cu), and O2 oxidizes Cu into Cu2. The improvement in Cu leaching efficiency from Cu metal was investigated experimentally in the sulfuric acid solution using ...

  • Leaching of iron from copper tailings by sulfuric acid

    Leaching of iron from copper tailings by sulfuric acid

    The leaching of copper tailings in the sulfuric acid solution may involve the reactions shown in eqn (5)(10). 11,24,25 The Gibbs free energy ( G ) is calculated to be 101.81 kJ mol 1 for Fe 3 O 4, 203.58 kJ mol 1 for Fe 2 SiO 4, 265.06 kJ mol 1 for CaO, 114.65 kJ mol 1 for CuO, 131.22 kJ mol 1 for ZnO, and ...

  • Sulfuric Acid Leaching of HighArsenic Dust from Copper

    Sulfuric Acid Leaching of HighArsenic Dust from Copper

    Jul 21, 2016 In connection with the deterioration in the quality of the concentrates that are now being produced and the use of recycled raw materials, lead, zinc, and arsenic are circulating in the semifinished products obtained during copper production and usually accumulate in the system in the form of dust. This article discusses results obtained from the sulfuric acid leaching of dust that is left ...

  • Copper Mining and Processing Processing Copper Ores

    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 ...

  • JP2014501849A Copper oxide leaching method replacing

    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 ...

  • Selective Copper Recovery by Acid Leaching from Printed

    Selective Copper Recovery by Acid Leaching from Printed

    Two-stage leaching and evaporation were applied to extract and purify copper from copper-contaminated sludge (i) in the first stage, 2.0 N sulfuric acid could leach out 95.2% Cu and other impurities (Fe, Al, and Pb) (ii) in the second stage, an ammonia solution was used to stabilize Cu by forming an amine complex in solution, while other ...

  • LEACHING OF LOWGRADE COPPER ORES A CASE

    LEACHING OF LOWGRADE COPPER ORES A CASE

    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.

  • LEACHING KINETICS OF COPPER FROM CHALCOPYRITE

    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).

  • Copper Mining and Extraction Oxide Ores

    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 of Metals from Hydrometallurgical Residue by

    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.

  • sulfuric acid usage in copper leaching Page 2 Gold

    sulfuric acid usage in copper leaching Page 2 Gold

    Feb 04, 2016 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.

  • Leaching of iron from copper tailings by sulfuric acid

    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 time of 120 min), 66.45% of Fe, along with 65.32% of Zn and 59.95% of Cu ...

  • The Decomposition of Hydrogen Peroxide in Acidic

    The Decomposition of Hydrogen Peroxide in Acidic

    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 vanadium from LD converter slag using sulfuric

    Leaching of vanadium from LD converter slag using sulfuric

    Apr 01, 2010 3.2. Effect of sulfuric acid concentration. Fig. 4 shows the effect of acid concentration on the percentage of vanadium extracted (recovery, % R) as a function of leaching time from LD converter slag for the particle size of below 0.850 mm, at 70 C, S/L of 115 (g/mL), 90 min, particle size 0.850 mm. As it can be seen the vanadium recovery ...

  • Sulfuric acid leaching for capturing value from copper

    Sulfuric acid leaching for capturing value from copper

    Apr 01, 2019 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 As, 0.2 g/L Zn, 0.01 g/L Pb).

  • Sulfuric acid injection in copper heap leaching LEWA

    Sulfuric acid injection in copper heap leaching LEWA

    Sulfuric acid injection in copper heap leaching. Copper mining from oxide ores demand sulfuric acid that percolates the heap leaching pill. From there acid is debilitated while copper goes to the electro winning process. LEWA process pumps are used to reinject sulfuric acid at 98% into the main pipelines that go to the heap leach sprinklers, recovering the concentration with safety, efficiency and long

  • Improvement of Copper Metal Leaching in Sulfuric Acid

    Improvement of Copper Metal Leaching in Sulfuric Acid

    A new concept for copper (Cu) metal leaching by the simultaneous use of cupric ions (Cu2) and oxygen (O2) was proposed to improve Cu metal leaching in sulfuric acid. According to this concept, Cu2oxidizes Cu metal into cuprous ion (Cu), and O2oxidizes Cuinto Cu2.

  • Acid Leaching Copper Ore Treatment Method

    Acid Leaching Copper Ore Treatment Method

    May 23, 2017 CHEMISTRY OF COPPER DISSOLUTION. PREPARATION OF THE COPPER ORE. STORAGE AND FEEDING THE ORE. COPPER LEACHING. CHARGING THE TANKS. COPPER PRECIPITATION. ACID SUPPLY. PRODUCTION OF SULPHURIC ACID. The treatment of copper ores, both oxides and sulfides by means of flotation, hydrometallurgy or other processes has been well

  • A STUDY OF LEACHING OF COPPER OXIDE ORE BY

    A STUDY OF LEACHING OF COPPER OXIDE ORE BY

    A kinetic study of the sulphuric acid leaching of oxidised copper ore, primarily malachite, was carried out. The effects of leaching time, stirring speed, acid concentration, solid to liquid ratio...

  • Agitated Copper Leaching Cementation Process

    Agitated Copper Leaching Cementation Process

    Apr 14, 2016 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.

  • sulfuric acid leaching

    sulfuric acid leaching

    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

  • Selective leaching process for the recovery of copper and

    Selective leaching process for the recovery of copper and

    A selective acid leaching process was then used to recover the copper content of the residue after filtration. In the second stage, an additional 1 N of sulphuric acid was added to the suspension in the selective leaching process, and the pH value was controlled at 1.5-2.0. The reagent sodium hydroxide (2 N) was used as leachate at a pH greater ...

  • Leaching of Copper from Cuprous Oxide in Aerated

    Leaching of Copper from Cuprous Oxide in Aerated

    The leaching efciency of copper was reported to be about 50% in the case of leaching in sulfuric acid solution without other oxidants79). Although Sullivan and Oldright7 ) and Majima et al.9 observed that the intro-duction of oxygen or air enhanced the leaching efciency of copper by employing single experimental set without further

  • A comprehensive study of the leaching behavior and

    A comprehensive study of the leaching behavior and

    A comprehensive study of the leaching behavior and dissolution kinetics of copper oxide ore in sulfuric acid lixiviant B. Bayati, A. Azizi, and M. Karamoozian Faculty of Mining, Petroleum and Geophysics, Shahrood University of Technology, Shahrood, Iran. Received 20 September 2017 received in revised form 20 December 2017 accepted 27 January 2018

  • A review of chloride assisted copper sulfide leaching by

    A review of chloride assisted copper sulfide leaching by

    Please cite this article as Senanayake, G., A review of chloride assisted copper sulde leaching by oxygenated sulfuric acid and mechanistic considerations, Hydrometallurgy (2009), doi 10.1016/j.hydromet.2009.02.010 This is a PDF le of an unedited manuscript that has been accepted for

  • Question Video Reaction of Sulfuric Acid with Cupric

    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.

  • Copper Dump Leaching and Management Practices That

    Copper Dump Leaching and Management Practices That

    Sulfuric acid also may be added to the barren leach solu- tion applied to the dump. Most leaching operations can obtain sulfuric acid rather inexpensively from copper smelters that produce large amounts of the acid from the sulfur dioxide (SO) gases generated in the smelting, roasting, and converting operations.

  • Selective Copper Recovery by Acid Leaching from

    Selective Copper Recovery by Acid Leaching from

    Chemical Co. Ltd, Tokyo, Japan) and sulfuric acid (H2SO4, 95%, Junsei Chemical Co. Ltd, Tokyo, Japan) were used as lixiviants to leach the copper sludge. Leaching experiments were perfor med in a 1000-mL glass beaker at a fixed stirring speed of 250 rpm using a magnetic stirrer bar. A specific amount of ground sample was dissolved in the acidic

  • Recovery of Copper by Solution Mining Methods

    Recovery of Copper by Solution Mining Methods

    copper sulfides, inadequate contact of the leach solutions with soluble copper minerals (i.e. channeling) and poor oxygenation (OGorman et. al, 2004). The proposed in-situ project at Florence, Arizona will introduce dilute sulfuric acid solutions (99.7% water and 0.3% H 2 SO 4 by volume) via injection wells to the copper-

  • Extraction of Tin and Copper by Acid Leaching of PCBs

    Extraction of Tin and Copper by Acid Leaching of PCBs

    Feb 02, 2013 Rate of solder dissolution with time for different acid concentrations was studied. Sulfuric acid was found unable to leach the solder at low concentrations, so further study was discarded. Perchloric acid was also found ineffective. Nitric acid, a strong oxidizing agent has selective dssouton propertes for copper tn and lead. Moreover t is

  • Better prospects for the price of copper push up the value

    Better prospects for the price of copper push up the value

    Dec 14, 2020 Better prospects for the price of copper push up the value of sulfuric acid. In the long term, a surplus scenario is expected in the country. It is one of the main inputs of the mining industry, and in some cases it can represent up to 30% of the processing costs. Among the inputs used by mining operations to extract copper through the leaching ...

  • A statistical approach to the experimental design of the

    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.

  • Innovations How Do They Do That Wringing Sulfuric Acid

    Innovations How Do They Do That Wringing Sulfuric Acid

    The BHP smelter at San Manuel produces 450,000 gallons of sulfuric acid a day, or enough to fill 12,500 rail cars or 52,000 trucks every year. BHP Copper uses 18 percent of the sulfuric acid it makes for leaching its own oxide ore. Another 40 percent of its sulfuric acid production is sold to other mining companies for their leaching operations.

  • Leaching of metals from hydrometallurgical residue by

    Leaching of metals from hydrometallurgical residue by

    The effect of sulfuric acid on the leaching of the recovery of metals Zn, Fe and Cu was studied at constant temperature (85 C),particle size (63m) leaching time of 2h and solid-to-liquid ratio (110). The results of the effect of H 2 SO 4 concentration on of the recovery of metals are illustrated in Figure 6.

  • Process development for recovery of copper and precious

    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