sulfide type copper ore acid leaching

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Process for leaching copper from copper sulfide using ...

The invention is directed to a process for leaching copper by a bacteria leaching process using ores containing copper sulfide, wherein copper is leached with an acid leaching solution having a redox potential of from 550 to 750 mV, …

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Industrial Heap Bioleaching of Copper Sulfide Ore Started ...

Sulfuric acid solution containing ferric iron is the extractant for industrial heap bioleaching of copper sulfides. To start a heap bioleaching plant, sulfuric acid is usually added to the irrigation solution to maintain adequate acidity (pH 1.0–2.0) for copper dissolution. An industrial practice of heap bioleaching of secondary copper sulfide ore that began with only …

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Microbes and mineral recovery: Bioleaching of copper, gold ...

The leaching of sulfide minerals distinguishes bioleaching from conventional acid leaching. Bioleaching involves the use of microorganisms to catalyze the oxidation of iron sulfides to create ferric sulfate and sulfuric acid. Bioleaching is used today in commercial operations to process ores of copper, nickel, cobalt, zinc and uranium.

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LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY …

Oxide copper ore, mixed oxide-sulphide ores and low-grade copper sulphide ore, which, for economic reasons, cannot be enriched by flotation, may be processed by leaching methods. Agents for leaching copper can be acid, base, or salt solutions. Of all of these agents, sulphuric acid has been given the

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sulfur copper ore flotation machine

(2) Copper-sulfur ore Called copper-bearing pyrite. In addition to copper minerals, iron sulfide can be recovered, and the main mineral of sulfur is pyrite. 1 Types of copper sulfide ore (1) Single copper mineral Its ore characteristic is relatively simple, and the only useful component that can be recycled is copper.

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What is the best method for sulfide copper leaching?

Most recent answer. One of the important subject in copper sulfide leaching, Ore Characterisation and related method. Bacteria Heap Leaching and Oxidative bacterial heap leaching two methods that ...

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Innovations in Copper: Mining & Extraction: Producing ...

Further, through the use of biooxidation, it is now possible to leach many of the copper sulfide minerals present in the ore. While chalcopyrite remains refractory to ambient temperature bioleaching, other copper sulfide minerals - the secondary sulfide minerals - such as chalcocite, covellite, bornite, etc . - are leachable by today's technology.

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Copper Ore Types: Sulfides vs. Oxides | INN

There are two main types of copper ore of interest: copper oxide ores and copper sulfide ores. Both ore types can be economically mined, but …

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Marimaca Reports Positive Metallurgical Results from

Due to these reactions during sulphide leaching it can be inferred that copper dissolution in a leaching operation may materially exceed …

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Primary Copper Ore Leaching by Leaching Solution Adjusted ...

Copper ore is classified into three groups; primary copper sulfide, copper oxide and secondary copper sulfide. Leaching copper from primary copper sulfide, such as chalcopyrite, with sulfuric acid takes longer time than from copper oxide and secondary copper sulfide. As such, an oxidant is required to extract copper from chalcopyrite. In this study, column leaching tests …

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Leaching of sulfide copper ore in a NaCl–H2SO4–O2 …

The leaching of sulfide copper ores of the djurleite and digenite type was effective through agglomerative pre-treatment with H2 SO 4 (conc) and NaCl, followed by leaching in an NaCl–H 2 SO 4 –O 2 media at room temperature. 2.-. The leaching process was only weakly affected by the quantity of sodium chloride added.

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Characterization study and recovery of copper from low ...

This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using …

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Leaching of a pyrite-based ore containing copper using ...

Here, the leaching of a sulfide ore (32% Fe, 2% Cu) is investigated using a mixture of sulfuric acid and hydrogen peroxide (0.15 M H 2 SO 4 and 0.5 M H 2 O 2), in proportions forming a slurry 10% w/w. The leaching process is found to occur in two stages, the first corresponding to an exothermic, peroxide-mediated dissolution, and the second ...

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Properties of Copper Ores Water Wagon

feel that there are copper-rich ore bodies present at this new site. There is an abundance of water and sulfuric acid that could be used to dissolve (leach) the copper compounds found in the ore if this is possible. Leaching can be defined as the ability of a solvent (such as water or sulfuric acid) to dissolve precious metals from an ore body.

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Heap Leach: Mining's breakthrough technology - MINING.COM

This would result in a dramatic expansion of the technology as ~80% of total ore types are sulfide in nature. Heap Leaching, at first sight, seems to be a relatively simple technology, but is in ...

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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 ...

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Roasting and Leaching Bulk Copper-Zinc Sulfide ...

The recovery of zinc from its ores, by roasting, leaching, and SQb-seqQent electrolysis of the leaCh solution parallels, to a large degree, the work of this investigation. Inthe present plant practice the leach-ing is accomplished in two steps,.a neutral leach and an acid leach. The fresh calcine is fed, either in whole or in part, into the neutral

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In-place leaching of primary sulfide ores: laboratory ...

OSTI.GOV Conference: In-place leaching of primary sulfide ores: laboratory leaching data and kinetics model

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Arizona Department of Mines and Mineral Resources

copper are often not adequate when applied alone to the mixed oxide sulfide mineralogic type. The standard commercial oxide copper analysis may be misleading as an indicator of ore grade for sulfuric acid leaching, if the mineralogic composition of the sample is not considered. Oxide copper minerals such as

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Energy and Environmental Profile of the U.S. Mining …

are hydrochloric and sulfuric acids. Microbial (or bacterial) leaching is used for low-grade sulfide ores; however, this type of leaching is much slower than standard acid leaching. Its use is still being piloted. Hydrometallurgical copper recovery is the extraction and recovery of copper from ores using aqueous solutions.

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Effect of Pretreatment on Leaching Primary Copper Sulfide ...

The aim of this study was to improve the dissolution of copper sulfide ore composed mainly of chalcopyrite (1.21 wt %) and bornite (0.54 wt %) using a …

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Optimization of sulfuric acid leaching of roasted ...

Chalcopyrite (CuFeS 2) is commonly used ore in production of copper, but leaching of this ore is very slow and inefficient due to "passivation" during leaching at atmospheric conditions.In this study, in order to overcome drawbacks of the passivation layers, the concentrate supplied from Eti Bakır A.Ş. Küre Plant in Turkey was roasted at 600 °C for 1 …

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Recovery of Copper from Copper ores by roasting at ...

The representative samples of copper ore were selected from different areas of Pakistan. These ores belong to the following types: a. Copper sulfide (chalcopyrite concentrates) of Waziristan areas (sample C) b. Oxidized ore of copper from Dalbandin area in Baluchistan (sample D). c. Mixed copper ore samples.

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Heap Leaching Oxide and Sulfide Copper 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 to evaluate different variables, namely the addition of nitrate as NaNO3 (11.7 and 23.3 kg/ton), chloride as NaCl (2.1 and 19.8 kg/ton), curing time (20 and …

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Atmospheric leaching of copper from oxide-sulfide ore ...

In contrast to sulfide minerals, leaching of oxide ores does not requires presence of oxidizing agent. This paper presents the results of influence of temperature on the leaching degree of copper from pyritechalcopyrite concentrate by sulfuric acid solution at atmospheric pressure.

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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 ...

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floatation of copper ores

RECOVERY OF COPPER FROM OXIDE COPPER ORE BY FLOTATION AND LEACHING Kiraz, Emirhan M.S., Department of Mining Engineering Supervisor: Prof. Dr. Mustafa Ümit Atalay December 2014, 65 pages The aim of this study was the recovery of copper from the oxide copper ore by froth flotation and agitating sulphuric acid (H 2 SO 4) leaching.

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(PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE | …

LEACHING OF A ROASTED COPPER SULFIDE ORE Rosselle Kim P. Castillano, Wilfredo T. Gatdula Jr., Gin Derick L. Magno, Jhunalyn H. Parantar METE 157N: HYDROMETALLURGY LABORTORY ABSTRACT Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the …

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Hydrometallurgical Processing of Low-Grade Sulfide Ore …

mainly for recovery of gold, copper, and uranium, from low-grade ores, mining and processing waste [2–6,16–19]. The twenty percent of the world's copper production is accomplished by heap leaching of ores from mines and processing plants as well as waste ores from dumps and further processing by solvent extraction and electrowinning (SX ...

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[Leaching of copper ore of the Udokanskoe deposit at low ...

The possibility of copper ore leaching of the Udokanskoe deposit using sulfuric acid with pH 0.4 at negative values of temperature and applying acidophilic chemolithotrophic microorganisms at positive values of temperature and low pH values was shown.

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Study of integrated leaching and electrowinning of copper ...

Results showed that high hydrochloric acid and cupric ion concentration assisted leaching; on the other hand, electrowinning of copper from chalcopyrite ore leaching solution using chloride media is much feasible when acid and cupric ion concentrations are low (0.05 M/l and 0.01 M/l, respectively).

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(PDF) Copper Extraction from Oxide Ore of Almalyk Mine by ...

minerals Article Copper Extraction from Oxide Ore of Almalyk Mine by H2SO4 in Simulated Heap Leaching: Effect of Particle Size and Acid Concentration Chan-Ung Kang 1, Seung-Eun Ji 1, Thomas Pabst 2, Kung-Won Choi 1, Moonis Ali Khan 3, Rahul Kumar 4, Prakash Krishnaiah 1, Yosep Han 5, Byong-Hun Jeon 1, * and Do-Hyeon Kim 1, * 1 Department of Earth Resources …

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Leaching of Copper Sulphides - SAIMM

POX in a copper heap leach circuit. Figure 2. Simplified ferric leaching flowsheet. Figure 3. Copper chloride leach process. Leaching Chemistry As outlined earlier, the leaching chemistry that takes place within a total POX autoclave is very complex and will vary from case to case according to the mineralogy of the concentrate fed to the

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Acid leaching of copper ore heap with fluoroaliphatic ...

The primary acid-soluble copper mineralization in the copper ore used was chrysocolla. Analysis of the ore showed the ore contained 0.57% copper, 0.54% acid soluble non-sulfide copper, and 2.40% iron. The columns used were 8-inch (20.3 cm) diameter, 6-feet (1.83 m) high, and constructed from polyvinylchloride pipe.

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