A Statistical Approach to the Experimental of the Leaching of Sulfide …
This study indicates that pretreatment has a positive effect on copper dissolution from primary copper sulfide ore in an acid-chloride medium. It also provides a feasible alternative for treating primary copper sulfide ores at the industrial level. ... This work investigates the effect of an agglomeration and curing pretreatment on leaching of ...
Ecofriendly leaching agents for copper extraction—An …
Several different leaching agents have been used for copper extraction, with some review articles documenting their use in general copper leaching [16], [21], [22].Li et al. (2022) [13] presented a review of articles that use glycine for metal dissolution in ores, concentrates, and waste compared to the traditional system using cyanide. The study revealed that glycine can …
Arsenic immobilization from high-As sulfide copper ores …
The processing of high-impurity ores has become increasingly common in recent years. Enargite (Cu 3 AsS 4) is an important source of copper, but it is notorious for its high arsenic content, posing serious environmental concerns.This study explores the potential of a high-pressure leaching system for treating high-arsenic-containing copper ores.
GEOMETALLURGICAL STUDY OF COPPER WHOLE ORE …
MSA and sulfuric acid leaching in acidic media were more efficient than alkaline glycine leaching for all ore types. Hydrogen peroxide worked better than ferric ion as an oxidant, particularly for the sulfide samples in the acidic leaching. Leaching of the -0.038 mm fine size led to lower
Review on comprehensive utilization of nickel laterite ore
Qiao et al.(2025) extracted iron from nickel laterite ore acid leaching residue using phosphoric acid and iron powder, achieving a 96.5 % iron recovery rate and producing high-purity FePO 4 (99.4 %). This method offers a new approach for the resourceful utilization of nickel laterite ore acid leaching residue.
Extraction of copper from complex carbonaceous sulfide ore …
In the 1970-90s, it was suggested that different additives be used to intensify the sulfide copper ore leaching process with acid solutions, such as sulfuric and nitric iron (III) and ammonium ...
Acid leaching and dissolution of major sulphide ore …
Acid leaching and dissolution of major sulphide ore minerals: processes and galvanic effects in complex systems - Volume 68 Issue 2 ... Type Research Article. Information Mineralogical Magazine ... Chlorate-based oxidative hydrometallurgical extraction of copper and zinc from copper concentrate sulfide ores using mild acidic conditions ...
Leaching of Copper Sulphides
Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper chloride leaching. The effect of mineralogy on the choice of …
(PDF) Accelerating Copper Leaching from Sulfide Ores in Acid …
This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini-columns in acid-nitrate-chloride media. ... (25-70 • C), reagent concentration, and nitrate type (sodium and potassium) were studied variables. Leaching conditions were: 100 g ore/1 L solution; P ...
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exception of chrysocola, leaching behavior of copper-bearing minerals under ferric-iron/sulfuric acid leaching is generally closely modelled by dissolution with sodium cyanide of assay-type …
Copper Sulfide Ore
With the depletion of high-grade ores, attention has now been turned towards copper extraction from lean grade, waste grade, and run-of-mine ores, and even from tailings and slags. Heap leaching was initially applied to acid leaching of copper oxide ores and later extended to secondary sulfides and mixed oxide-sulfide copper ores.
Copper Ore Types: Sulfides vs. Oxides | INN
Copper-containing rock, or copper ore, holds only a small percentage of copper. Most of the rock is unwanted material, typically referred to as gangue.There are two main types of copper ore that ...
Accelerating Copper Leaching from Sulfide Ores …
This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini-columns in acid-nitrate-chloride media. Ten pretreatment tests were conducted …
Acid leaching of oxide–sulfide copper ore prior the …
Reduction of "oxide copper", by acid leaching prior the flotation concentra-tion, can increase the overall copper efficiency up to more than 70% in the single-stage leaching, achieving an …
Leaching of Copper Ores: Effects of Operating Variables
in a total estimate of 60 million tons of copper ore reserves, with an average grade of 1.63 % [17]. There are many studies published in the literature on the leaching of non-Jordanian copper ores using various lixiviant. For example, Madsen et al. [19], developed a shrinking core model to describe the leaching of copper from sulfide ores
Heap Leaching
Heap leaching is the most important method of hydrometallurgical copper extraction. Heap leaching is used for treating oxide and lower-grade secondary sulfide ores that contain up to ∼2% Cu. The ore is crushed to a uniform particle size (typically 12–50 mm), often agglomerated, and then stacked on large flat-topped heaps in a controlled manner.. Heaps are typically ∼7 m high …
(PDF) Leaching of Copper Sulphides
The ore treated in the Pueblo Viejo gold leaching process contains copper, which is removed from the process as copper sulphide. This application utilizes high-quality reactor tec hnology and Paques
The Use of Acid Leaching to Recover Metals from Tailings: A …
One particularly significant and recently studied waste stream is mine tailings, a byproduct of sulfide ore concentration procedure [].These tailings are transported to tailings deposits [] with a focus on achieving chemical and physical stability [2,6].To meet these objectives, it is imperative to remove toxic agents and potential sulfuric acid producers, …
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 ...
Primary copper sulfides bioleaching vs. chloride leaching: …
Approximately 500 g of ore was agglomerated placing the ore over a plastic liner and adding water while rolling the ore up to 10% moisture.The agglomerate ore was packed in 6 cm diameter acrylic columns.The chemical leaching columns were subject to diluted sulfuric acid conditioning at a feeding rate of 5 L/h·m 2 in closed circuit for 24 h until reaching pH 1.4 in the …
A fresh approach to sulfide ores
T he copper mining industry is reaching a turning point. Surface oxide deposits are depleting and copper miners are turning their attention to untapped sulfide ores found deeper underground. However, sulfides require more expensive processing techniques since they are not responsive to standard technologies that are used in oxide heap leaching.
Copper leaching from primary sulfides: Options for …
The site operating cost for ore through to metal were reported to be $0.31 USD/lb of copper, one of the lowest cost operations in the world. The Mt. Gordon copper leach and process plant was shut down in 2004 due to change of ore type (no longer Esperanza chalcocite/pyrite) and corporate change of ownership to the Birla company from India.
Extracting Copper from Its Ore: The Process Explained
Sulfide ores use froth flotation, roasting, smelting, and air blowing to produce high-purity copper, while oxide ores use heap leaching, solvent extraction, and electrowinning. Each method is tailored to the ore type, ensuring efficient extraction and high-purity copper production. Frequently Asked Questions
Leaching of sulfide copper ore in a NaCl–H2SO4–O2 media with acid …
A study was made of the leaching of a sulfide copper ore in a NaCl–H 2 SO 4 –O 2 media after pre-treatment by agglomeration with H 2 SO 4(conc) and NaCl. The leaching variables evaluated included the amount of NaCl to be employed, the percentage of solids in the leaching solution, particle size of the raw mineral to be leached, and the preferable method of …
Leaching of Copper Ores: Effects of Operating Variables
copper from sulfide ores using acidic ferric sulfate. Bryden [8], studied the leaching of copper from malachite using the ammonium sulfate solution and showed that the mixed.
Highly efficient resource recovery from polymetallic sulfide ores …
Likewise, the treatment of alkaline gangue-type polymetallic sulfide ores by conventional acid leaching or conventional bioleaching processes also faces insurmountable bottlenecks, including high sulfuric acid consumption, mineral leaching interface passivation, and excessively high Ca and Mg content in the leaching liquor [11].
A review of chloride assisted copper sulfide leaching by …
Peters (1976a) reported that chalcopyrite, the primary and most important sulfide mineral of copper, is most difficult of the copper sulfides for hydrometallurgical treatment due to slow leaching kinetics. Recent reviews have highlighted the growing interest and conflicting views amongst researchers to understand the mechanistic details of leaching of chalcopyrite and …
Study of Factors Affecting the Copper Ore Leaching Process
The use of this biochemical method in the copper leaching process resulted in a significant reduction in sulfuric acid consumption, by 40%, and a copper recovery rate of …
Leaching Sulfides by Sulphuric Acid: Copper
The improvement in leaching introduced by the Russell process has stimulated the development of processes for refining lixiviation-sulphides. In the early days several processes for dealing with the sulphides were proposed, and some of them were tried more or less ; but the business finally settled down to sending the sulphides to the smelters, although this was known …
Extracting Copper from Ore: A Step-by-Step Guide
The main types of copper ores are sulfide ores and oxide ores. Sulfide ores, such as chalcopyrite (CuFeS2), bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), and digenite (Cu9S5), are typically found in large, low-grade deposits and are processed using froth flotation to concentrate the copper.