ammonia leaching of copper

ammonia acetic acid leaching in mineral processing

Full text - doiSerbia May 10, 2012 ... Solutions containing ammonia allow for selective leaching of copper from a copper ore. ... energy of this leaching process was determined to be 59.6 kJ mol-1. Conse- ... of ore is carried out at mildly acidic or basic condi-.

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Investigation of Leaching Kinetics of Copper from Malachite Ore in Ammonium Nitrate Solutions | SpringerLink

The production of metallic copper from low-grade copper ores is generally carried out by hydrometallurgical methods. Leaching is the first prerequisite of any hydrometallurgical process. Solutions containing ammonia may allow for selective leaching of the copper from the ore. In this study, the

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Ammonia leaching technology replaces sulphuric acid

Minerals processing technology firm MC Process has been appointed the global technical partner for London-listed Alexander Mining to introduce an ammonia leaching process onto the African market for the first time.

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Cobalt extraction - Wikipedia

Cobalt extraction refers to the techniques used to extract cobalt from its ores and other compound ores. Several methods exist for the separation of cobalt from copper and nickel. They depend on the concentration of cobalt and the exact composition of the used ore

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The Leaching of Copper Oxide Ore in Ammonium Chloride Solution

Abstract: Large quantities of ammonia-nitrogen (-N) in wastewater is one of the main causes of eutrophication that endanger both natural water bodies and fresh water seriously. Thus, it is necessary to find an economic and feasible method to remove the ammonium ...

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AMMONIA LEACHING IN THE COPPER INDUSTRY: A REVIEW

AMMONIA LEACHING IN THE COPPER INDUSTRY: A REVIEW meters, of which the first overflow was filtered for the pregnant solution. The basis of this process was ammonia leaching of chalcopyrite concentrates in the presence of oxygen, and 70 to 80 C ...

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Copper Leaching Behavior from Waste Printed Circuit Board in Ammoniacal Alkaline Solution

removal of copper from ferrous scrap by an ammonia leaching method.3,4) In these studies, Cu(I) ions were obtained under an air or oxygen atmosphere as the reaction ...

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leaching of copper from tailings using ammonia

granite quarry plant leaching of copper from … granite quarry plant leaching of copper from tailings using ammonia . Founded in 1997, Shandong Xinhai Mining Technology ... A REVIEW OF COPPER CYANIDE RECOVERY FOR … A REVIEW OF COPPER ...

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Ammonia Leaching: A New Approach of Copper Industry in Hydrometallurgical Processes

Download citation | Ammonia Leaching: A... | Ammonia and ammonium salts have been recognized as effective leaching agents in hydrometallurgical processes due to low toxicity and cost, easy recovery and high selective recovery of metals. New research findings ...

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Leaching kinetics of copper flotation tailings in aqueous ammonia/ammonium carbonate solution - You-Cai - 2012 - The Canadian Journal of Chemical ...

The experiments of agitation leaching were carried out in aqueous ammonia/ammonium carbonate solution, to recover copper from the flotation tailings of waste copper oxide residue. The main copper minerals contained in the flotation tailings are chrysocolla ...

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US4165264A - Ammonia leaching - Google Patents

An improved process for obtaining copper from a copper sulfide, in which: the copper sulfide is treated with oxygen and an aqueous leaching solution of ammonium carbonate, to form a leach liquor which contains ammonia complexes of copper sulfate and copper ...

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OPTIMIZATION OF LEACHING OF COPPER FROM OXIDIZED COPPER ORE IN NH3-(NH4)2SO4 MEDIUM: Chemical Engineering Communications: Vol 192, No 11

ABSTRACT Studies were carried out for selective leaching of Cu with simultaneous avoidance of iron dissolution during leaching of oxidized copper ore in an aqueous NH3-(NH4)2SO4 system. The effects of leaching parameters, such as ammonia concentration ...

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LEACHING OF MALACHITE ORE IN AMMONIUM SULFATE SOLUTIONS AND PRODUCTION OF COPPER OXIDE

ammonia leaching of oxidized copper ores, as the dissolution reactions happen at mildly acidic or basic conditions, some metal impurities, which pass into ...

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COPPER(II) EXTRACTION FROM AMMONIA LEACH SOLUTION

Ammonia leaching of sulfide copper concentrates generate buffer type liquors (pH ranges from 9 to 10), because of the excess of ammonia and significant amount of ammonia sulfate as a leaching agent. Metals such as Cu, Ni, Co and Zn occur in Alkalinity of ...

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LEACHING OF MALACHITE ORE IN AMMONIUM SULFATE SOLUTIONS AND PRODUCTION OF COPPER OXIDE

In ammonia leaching of oxidized copper ores, as the dissolution reactions happen at mildly acidic or basic conditions, ... was more appropriate for the kinetics of the leaching of copper from malachite ore in ammonium sulfate solutions. By using the expression k ...

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Ammonia/nitric Acid Leaching of Copper- Cobalt Oxidized Ore

during the process. This is Abstract— The alkaline leaching behaviour of rich copper- cobalt oxidised ore from Katanga has been investigated. Copper was leached in ammonia/nitric acid solution at room temperature. The effects of time, ammonia concentration ...

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Copper recycle from sulfide tailings using combined leaching of ammonia solution and alkaline bacteria - ScienceDirect

Combined leaching method of ammonia solution and alkaline bacteria during copper tailings is explored. • A novel strain of alkaline bacteria isolated from copper sulfide tailings is presented. • Comparison of ammonia leaching, bioleaching and combined leaching is ...

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The selective leaching of copper from a gold–copper concentrate in glycine solutions

lowgradeconcentrate overseasis often uneconomical.Therefore,anal-ternative process would be useful for recovering both copper and gold from such a low-grade concentrate. Cyanide–ammonia leaching of Telfer flotation tailings has been carried out by Muir et al ...

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Ammonia Leaching Of Copper -

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Leaching of copper from tailings using ammonia/ammonium chloride solution and its dynamics - IEEE Xplore Document

Abstract: The leaching of copper from the tailings of Baifang Copper Mine in Hunan province in China by aqueous ammonia/ammonium chloride solutions has been studied. The tailings belong to a low-grade and high-alkaline copper ore. The effect of leaching time, the concentration of ammonia, solid

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Thiosulfate leaching kinetics of gold in the presence of copper and ammonia - ScienceDirect

Thiosulfate leaching kinetics of gold in presence of copper and ammonia 1073 RESULTS AND DISCUSSION Gold leaching kinetics Gold leaching rates for various solution conditions were measured using a REQCM. Figure 1 shows a typical leach curve for gold ...

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The Principles and Applications of Ammonia Leaching of Metals—A Review: Mineral Processing and Extractive Metallurgy Review: Vol 16, No 1

Abstract An extensive literature survey on the principles and applications of ammonia leaching processes in hydrometallurgy is presented in this paper. The combination of ammonia anal ammonium salts is known to be a powerful lixiviant used in hydrometallurgical ...

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AmmLeach A New Paradigm in Copper Cobalt Processing

Copper Cobalt Africa, incorporating the 8th Southern African Base Metals Conference Livingstone, ... presence of ammonia, cobalt and copper form soluble ammine complexes whilst the undesirable metals, represented here by Fe and Mn, do not. Thus ...

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CA1153984A - Ammonia leaching - Google Patents

AMMONIA LEACHING Abstract-of the Disclosure An improved process for obtaining copper from a copper sulfide, in which: the copper sulfide is treated with oxygen and an aqueous leaching solution of ammonium carbonate, to form a leach liquor which ...

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Ammonia Leaching: A New Approach of Copper Industry in Hydrometallurgical Processes | SpringerLink

Ammonia and ammonium salts have been recognized as effective leaching agents in hydrometallurgical processes due to low toxicity and cost, easy recovery and high selective recovery of metals. New research findings on considerable advantages of leaching by these agents and elimination of problems

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