copper leaching ammonium carbonate

ammonium carbonate leaching of copper - Sebocom
The rate of copper leaching shows that the surface reaction model applies best to this system. The activation energy was 11.5 kJ/mol at 25 °C and 57.6 kJ/mol at 60 °C. The reaction order with respect to ammonia was 1.9 and for ammonium carbonate it was 4.0.
Charlar en Línea
Ammoniacal leaching and recovery of copper from alloyed
2014-11-26 Obtained result showed that the most favorable conditions for the alloy dissolution can be achieved in the ammonia–ammonium carbonate system. It allows
Charlar en Línea
Leaching kinetics of copper flotation tailings in aqueous
2013-4-1 Optimum leaching conditions from malachite ore by ammonia/ammonium carbonate solution are found as ammonia/ammonium carbonate concentrations: 5 M
Charlar en Línea
Use of Ammonia Salts in Selective Copper Extraction from
2020-6-3 For this purpose, the effects of parameters such as leaching temperature and leaching time were examined at different concentrations of ammonium hydroxide,
Charlar en Línea
Leaching kinetics of low-grade copper ore containing
2012-11-1 The leached residue was weighed after being dried at 110 Â°C for 8 h. 3 Results and discussion The effect of agitation speed on the copper leaching was carried out in
Charlar en Línea
Dissolution kinetics of malachite in ammonia/ammonium
2005-1-1 The leaching of oxide copper ore containing malachite, which is the unique copper mineral in the ore, by aqueous ammonia solution has been studied. The effect of
Charlar en Línea
Ammonia Leaching: A New Approach of Copper
2013-10-1 Potassium permanganate, as a common strong oxidant, was selected as the oxidant for the leaching system. Ammonia, known for its high efficiency in leaching copper [15], was introduced into...
Charlar en Línea
Separation of nickel from copper in
2010-4-1 Aqueous phase: 3 g/l each of copper and nickel, 60 g/l ammonium carbonate, pH 9.2. Contact time: 10 min at room temperature. The results of the selective nickel
Charlar en Línea
Dissolution Kinetics of Malachite in
2005-1-31 During the leaching, copper dissolves as in the form of Cu (NH3)4+2 complex ion, whereas gangue minerals do not react with ammonia. It was determined that interface transfer and diffusion...
Charlar en Línea
Ammonium Carbonate Leaching Of Metal Values From
With two-stage leaching at 50 C in concen- trated ammonium carbonate, the copper-plus-nickel content can be reduced to a level of less than 1 percent from an original content
Charlar en Línea
Leaching kinetics of copper flotation tailings in aqueous
2013-4-1 An ammonia solution turns out to be helpful in dissolving copper oxide and carbonate minerals contained in tailings. Therefore, species such as chrysocolla (CuSiO 3 *2H 2 O) and malachite...
Charlar en Línea
Ammonia Leaching Study on Carbonate Oxidised Copper
2015-1-12 Applied Mechanics and Materials The effects of oxidized copper ores which came from Yunnan province were carried out by using ammonialeaching methods in the laboratory.In order to seek the optimum leaching conditions under normal temperature and pressure,we conducted a series of validation experiments.
Charlar en Línea
Ammonium-carbonate leaching of metal values from
With two-stage leaching at 50C in concentrated ammonium carbonate, the copper-plus-nickel content can be reduced to a level of less than 1 percent from an original content on the order of 10 percent. By roasting the depleted sludge with soda ash, at least 80 percent of the chromium can be recovered in water-soluble form.
Charlar en Línea
Selective leaching of copper and zinc from primary ores
2021-2-5 Copper leaching of metals from solid matrices by ammonium carbonate is well documented. However, little is known about metal extraction with biogenic ammonia, with just two studies to date implicating the role of microbially produced ammonia from a low grade Cu ore (Wang et al., 2013; Hu et al., 2016). Moreover, no studies to date have ...
Charlar en Línea
Ammonia Leaching: A New Approach of Copper
2013-10-1 Potassium permanganate, as a common strong oxidant, was selected as the oxidant for the leaching system. Ammonia, known for its high efficiency in leaching copper [15], was introduced into...
Charlar en Línea
Separation of nickel from copper in
2010-4-1 Aqueous phase: 3 g/l each of copper and nickel, 60 g/l ammonium carbonate, pH 9.2. Contact time: 10 min at room temperature. The results of the selective nickel stripping experiments are shown in Table 3. There was some copper stripping with nickel as the aqueous pH was decreased from 1.5 to 0.5.
Charlar en Línea
COPPER(II) EXTRACTION FROM AMMONIA LEACH
2013-9-7 Ammonia and its salts (carbonate or sulfate) are very effective and selective leaching agents. They can be a good alternative to acidic oxidative solutions, ... 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
Charlar en Línea
Leaching of a silicate and carbonate copper ore with
Leaching of a silicate and carbonate copper ore with heterotrophic fungi and bacteria, producing organic acids. Hildegard Kiel, ... In percolators with 14% sucrose medium up to 1780 ppm copper were found in solution. In leaching experiments with a sea water medium containing 7% sucrose only 684 ppm Cu were soluble. Leaching with lactobacilli ...
Charlar en Línea
Dissolution kinetics of malachite in
The leaching of oxide copper ore containing malachite, which is the unique copper mineral in the ore, by aqueous ammonia solution has been studied. The effect of leaching time, ammonium hydroxide ...
Charlar en Línea
Role of copper(II), carbonate and sulphite in gold leaching
2005-4-1 Researchers have been unable to incorporate the copper(II)–thiosulphate complexes in Eh-pH or species distribution diagrams due to the unreliability o
Charlar en Línea
Ammonia Leaching: A New Approach of Copper Industry
2013-12-10 In general, ammonia leaching methods include: Neutral method: In this method, the metals are dissolved without any oxidizing or reducing agents. Leaching of copper, zinc or molybdenum oxides are of this type. Oxide method: In this method, leaching requires the use of an oxidizer to oxidize solids such as metals or sulfide minerals.
Charlar en Línea
Ammonia Leaching Study on Carbonate Oxidised Copper
2015-1-12 Applied Mechanics and Materials The effects of oxidized copper ores which came from Yunnan province were carried out by using ammonialeaching methods in the laboratory.In order to seek the optimum leaching conditions under normal temperature and pressure,we conducted a series of validation experiments.
Charlar en Línea
Leaching kinetics of copper flotation tailings in aqueous
2012-4-9 Abstract 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, malachite, and cuprite, with the copper grade of 1.12%.
Charlar en Línea
(PDF) Ammonia leaching in the copper industry:
2012-1-1 ELECTROCHEMICAL INVESTIGATION OF THE DISSOLUTION OF COPPER, NICKEL, AND COPPER-NICKEL ALLOYS IN AMMONIUM CARBONATE SOLUTIONS. Article Jun 1975 Michael Nicol View Show
Charlar en Línea
Ammoniacal leaching and recovery of copper from
2016-4-1 The ammoniacal leaching has been considered very selective for copper compared with other leaching systems; however, there are interactions with zinc and nickel that also form stable ammonia Expand 5 Copper and zinc extraction from automobile shredder residues via an integrated electrodeposition and crystallization process
Charlar en Línea
Leaching kinetics of copper flotation tailings in aqueous
2013-4-1 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, malachite, and cuprite, with the copper grade of 1.12%. Effects of lixiviant
Charlar en Línea
(PDF) Copper ammonia leaching from smelter slag
2019-1-1 PDF On Jan 1, 2019, R. K. Nadirov and others published Copper ammonia leaching from smelter slag Find, read and cite all the research you need on ResearchGate
Charlar en Línea
Ammonia leaching - Phelps Dodge Corporation
shown in the figure is a schematic flow diagram of a process involving the steps of: (1) leaching copper with aqueous ammonia and ammonium carbonate; (2) heating the resulting leach liquor to form gaseous ammonia and carbon dioxide; (3) treating the leach liquor with a strongly alkaline material to precipitate sulfates and form additional gaseous
Charlar en Línea
Leaching of a silicate and carbonate copper ore with
Leaching of a silicate and carbonate copper ore with heterotrophic fungi and bacteria, producing organic acids. Hildegard Kiel, ... In percolators with 14% sucrose medium up to 1780 ppm copper were found in solution. In leaching experiments with a sea water medium containing 7% sucrose only 684 ppm Cu were soluble. Leaching with lactobacilli ...
Charlar en Línea
Dissolution kinetics of malachite in
The leaching of oxide copper ore containing malachite, which is the unique copper mineral in the ore, by aqueous ammonia solution has been studied. The effect of leaching time, ammonium hydroxide ...
Charlar en Línea