Sulphuric Acid Leaching Of Copper Silicate Ore
The technical feasibility of treating exotic copper ore with an acid cure using concentrated H2S04 is studied. Applications in a conventional percolation leaching circuit for unaltered ore and in a conventional agitation leaching circuit for altered ore are examined. The main effects of an acid cure are to inhibit silica dissolution and to increase the sedimentation rate of agitated pulps. An ...
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Leaching kinetics and predictive models for elements …
The results of experimental investigation on the study of leaching kinetics of copper oxide ore in sulphuric acid solution were discussed. The effect of time, pH, stirring speed and temperature on ...
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Leaching of Copper Concentrate with Iodized Salts in a Saline Acid …
With 0.5 M sulfuric acid, the extraction was 70.6%. However, with 1.0 M H 2 SO 4, belonging to the highest acid concentration, there is a lower extraction of 56.2% copper. In addition to the sulfuric acid systems, the figure shows a …
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Concurrent leaching of copper and cobalt from a copper–cobalt ore …
A study involving the leaching of Cu and Co from a Cu Co ore in sulfuric acid (H 2 SO 4), citric acid (CA) and oxalic acid (OA) using hydrogen peroxide (H 2 O 2) as oxidant, was carried out.The ore was characterised by x-ray fluorescence (XRF), x-ray diffraction (XRD) and scanning electron microscopy coupled with energy-dispersive x-ray spectroscopy (SEM-EDX).
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The Leaching of Dolomitic-Copper Ore Using Sulphuric Acid …
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, temperature and pH on the recovery of copper from chalcopyrite. The samples were ground and mixed with water and sulphuric acid to form an acid soluble …
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LEACHING OF A ROASTED COPPER SULFIDE ORE
MINERAL DRESSING, 2016. In the present paper, a review has been made for the recovery of copper from the ores using lixiviant sulphuric acid, the effects of the sulfuric acid concentration, leaching time, particle size and leaching temperature on the recovery of copper were examined.
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Copper Leaching Practices
The principal copper-bearing mineral in the ore is chrysocolla. Dilute sulfuric acid solutions containing from 30 to 35 grams per liter of acid are used to leach the ore. The pregnant liquors and wash waters obtained from the vat leaching operation are pumped to a precipitation plant where the copper is recovered by use of iron scrap.
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Agitation and column leaching studies of oxidised copper-cobalt ores
The efficiency of reductive leaching of oxidised copper-cobalt ore with sulphuric acid is highly dependent on pH (≈1.5). The pH can be maintained by the addition of make-up acid. Moreover, the amount of reducing agent used to reduce Co(III) is only partially utilised (Miller, 2008), a good part of it is therefore found unreacted in the leach ...
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Kinetics of copper leaching from direct-to-blister copper …
The influence of a number of leaching parameters such as sulfuric acid concentration, amount of H2O2 added, liquid to solid phase (l/s) parameter and process …
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Copper Acid Leaching Plant
Sulfuric acid, nitric acid, hydrochloric acid, sulfurous acid, pyrosulfuric acid, hydrofluoric acid, aqua regia, etc. are all commonly used leaching agents. Acid leaching is commonly performed by agitating an ore-leach mixture for 4 to as long as 48 hours at ambient temperature.
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Leaching of Copper Sulphides
Leaching of Copper Sulphides Marc Nicolle,1 Marko Lampi,2 Kari Valkama, 2 and Janne Karonen 1 Outotec (RSA) (Pty) Ltd, Johannesburg, ... At high-temperature pressure leaching conditions, the formation of sulphuric acid from sulphides in the ore is favoured, however at medium- and low-temperature conditions (150–165oC and >140oC, respectively ...
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Copper Leaching Solvent Extraction And Electrowinning …
Several leaching methods exist, with heap leaching and in-situ leaching being prominent examples. Heap leaching: Crushed ore is piled into large heaps, and a lixiviant (a leaching solution, typically sulfuric acid) is sprayed onto the heap. The copper dissolves into the solution as it percolates through the ore. This is cost-effective for large ...
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sulphuric acid leaching: Topics by Science.gov
Study on copper kinetics in processing sulphide ore mixed with copper and zinc with sulfuric acid leaching under pressure. NASA Astrophysics Data System (ADS) Wen-bo, LUO; Ji-kun, WANG; Yin, GAN. . Sulphide ore mixed with copper and zinc is processed with pressure acid leaching. Research is conducted on the copper kinetic.
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Copper Mining and Processing: Processing Copper Ores
Oxide ores are generally processed using hydrometallurgy. This process uses aqueous (water-based) solutions to extract and purify copper from copper oxide ores at ordinary temperatures, usually in three steps: heap leaching, solvent extraction, and electrowinning. Heap Leachingis the process of using percolating …
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Acidic and Ammonium Sulphate Leaching of Historic Copper …
Over 80% of Cu was extracted during leaching with sulphuric and hydrochloric acid. On the other hand, leach efficiency for manganese was around 70%. By comparison, sulphuric acid yielded a slight higher leach efficiency for copper and manganese than hydrochloric acid. Leaching time and temperature had a little influence on the recovery of ...
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The Leaching of Dolomitic-Copper Ore Using Sulphuric Acid …
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, temperature and pH on the recovery of copper from chalcopyrite. ... 8.14 % total copper and 22 % solids. The leaching was carried in duration of 0-6 ...
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STUDIES ON THE CURING AND LEACHING KINETICS OF …
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
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Acidic and Ammonium Sulphate Leaching of Historic Copper …
Over 80% of Cu was extracted during leaching with sulphuric and hydrochloric acid. On the other hand, leach efficiency for manganese was around 70%. By comparison, …
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Sulphuric Acid Bake-Leach Process for the Treatment of Mixed Copper
A sulphuric acid bake–leach method for the treatment of mixed copper-cobalt oxide minerals was investigated as an alternative to the reductive leaching method. Sulphuric acid bake-leach process of the mixed copper-cobalt oxide ore was carried out by mixing the sample with sulphuric acid followed by baking of the mixture in a muffle furnace.
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Procedure Residual Copper Soluble Analysis -Assay Method -Acid
Copper ores Analyte: Copper (Cu) ... The shake leach sulfuric acid soluble assay method attacks and quite thoroughly dissolves nearly all of the significant copper oxide minerals present, which are also amenable to standard sulfuric acid leaching conditions. If the same samples are then subjected to a sodium cyanide soluble assay, the secondary ...
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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.
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The Leaching of Dolomitic-Copper Ore Using Sulphuric Acid …
60 The Open Mineral Processing Journal, 2010, 3, 60-67 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 …
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Acid curing and agglomeration for heap leaching
The objective of this study was to investigate the impact of acid curing/agglomeration of the Zaldivar ore on copper extraction and acid consumption, 2. ... of clinochlore with sulfuric acid while the copper sulfate was probably produced by the reaction of copper oxide with sulfuric acid. After leaching and washing, the six new peaks and the ...
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Study of Factors Affecting the Copper Ore …
The biotechnological copper leaching process involves the irrigation of ore materials or technogenic waste-containing metal sulfides using sulfuric acid solutions and iron salts, as well as the introduction of viable …
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copper leaching with sulphuric acid
A Study Of Leaching Of Copper Oxide Ore By Sulphuric Acid. Ussteducn A Study Of Leaching Of Copper Oxide Ore By Sulphuric Acid. Abstract Hydrogen peroxide was used to reducing leach African copper-cobalt oxide ore.The influences of parameter including reducing agent quantity initial acid concentration liquid-solid ratio leaching temperature and …
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Leaching of a Cu-Co ore from Congo using sulphuric …
A Cu-Co ore from Katinga Province, the Republic of Congo containing 1.5% Co and 1.6% Cu was tested to determine the leachability of Cu and Co using sulphuric acid and hydrogen peroxide mixtures at ...
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Copper Heap Leaching & SX-EW Slideshow
Heap leaching & SX-EW is a method of extracting pure copper from oxide ore by placing the crushed ore on a pad in a heap and spraying the leaching solution, sulphuric acid, over the heap. The acid trickles through the heap and dissolves the copper mineral into solution. The leach solution collects at the bottom of the pad in a collection pond.
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Leaching of a low-grade chalcocite-covellite ore containing iron …
The kinetics of copper leaching from a chalcocite-covellite ore have been investigated. Leaching was carried out in sulphuric acid solution at different pH values and particle sizes, in the presence of ferric sulphate leached from the ore. Three stages of leaching were established.
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Sulfuric Acid Acid Concentration 93-98%
responsibly producing sulfuric acid, a useful by-product obtained during the smelter's copper production process. Our customers use sulfuric acid in a variety of applications, such as the manufacturing of fertilizer, paper processing, and copper leaching. At RTK, copper-sulfide ores are extracted from Bingham Canyon Mine for processing.
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Kinetic Investigation on Leaching of Copper from a Low …
Additionally, it was found that above 71% copper could be leached from the reject samples in the size range of 0–2 mm by 0.9 M sulfuric acid after 30 min contact time at 25 °C temperature.
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