leaching of copper from tailings using ammonia
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leaching of copper from tailings using ammonia

Leaching of copper from tailings using

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 ...

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Leaching of copper from tailings using

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/liquid ratio and temperature were investigated.

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Copper recycle from sulfide tailings using combined ...

2018-7-10  A comparison leaching with alkaline bacteria, ammonia or a combination of the two clearly indicated that copper recovery was remarkably better with combination that Cu extraction rate increased from 4.42% (48 days, ammonia leaching) or approximately 20% (30 days, alkaline bacterial leaching) to 29.57% (30 days, combined leaching).

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Leaching kinetics of copper flotation tailings in aqueous ...

2012-4-9  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

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Use of Ammonia Salts in Selective Copper Extraction from ...

2020-6-3  In this context, the first experiment involved recovery of copper from tailings using ammonium hydroxide (NH 4 OH). As seen in Fig. 3, the effects of different concentrations of ammonium hydroxide were examined. Fig. 3. Ammonia leaching of tailings (leaching time 120 min, solid/liquid ratio 1/10, a

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(PDF) Ammonia Leaching: A New Approach of Copper

2021-11-10  Ammonia leaching is being proposed for using in copper metallurgy as an alternative to sulfuric acid leaching [15][16] [17] [18][19]. The main advantages of

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(PDF) Ammonia leaching in the copper industry: a review

In this process, ammonia leaching of sulfide minerals of copper, nickel, cobalt and iron was conducted at a. temperature of about 105 °C and air pressure of 8 ATM. Under

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Use of the ammonia cyanide leach system for gold copper ...

1992-10-1  Minerals Engineering, Vol. 5, Nos 10-12, pp. 1421-1429, 1992 0892-6875/92 $5.00+0.00 Printed in Great Britain @ 1992 Pergamon Press Ltd USE OF THE AMMONIA CYANIDE LEACH SYSTEM FOR GOLD COPPER ORES WITH REFERENCE TO THE RETREATMENT OF THE TORCO TAILINGS M.C. COSTELLO, I.C. RITCHIE and D.J. LUNT Minproc Engineers Pty Ltd, PO Box 403,

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Ammonia Leaching: A New Approach of Copper Industry

2013-12-10  Z. Guo-dong, L. Qing, Leaching of copper from tailings using ammonia–ammonium chloride solution and its dynamics. International conference on chemistry and chemical engineering (ICCCE) (2010) 12. V. Radmehr, Determination of suitable parameters of ammoniacal column leaching for meskani mine copper ore. M.Sc Thesis.

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COPPER(II) EXTRACTION FROM AMMONIA LEACH

2013-9-7  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 ammonia systems as a cationic amminacomplexes. Alkalinity of the solution and free

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Leaching of copper from tailings using

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/liquid ratio and temperature were investigated.

More

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 concentration, solid‐to‐liquid ratio, stirring speed, and ...

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Leaching kinetics of copper flotation tailings in aqueous ...

2012-4-9  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

More

Recovery of Copper from Ammoniacal Leachates by Ion ...

2021-4-27  Copper and zinc extraction by ammoniacal leaching from microwave-roasted Cu-Zn-Pb sulfidic tailings followed by recovery of copper and zinc by ion flotation and precipitation. Introduction Tailings are mixtures of fine-grained unwanted fractions

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Ammonia Leaching in the Copper Industry: A Review

Ammonia leaching was first used for recovery of non-ferrous metals such as copper from oxide ores or ores containing pure copper, but gradually the use of this technology was developed from more ...

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Use of the ammonia cyanide leach system for gold copper ...

1992-10-1  Minerals Engineering, Vol. 5, Nos 10-12, pp. 1421-1429, 1992 0892-6875/92 $5.00+0.00 Printed in Great Britain @ 1992 Pergamon Press Ltd USE OF THE AMMONIA CYANIDE LEACH SYSTEM FOR GOLD COPPER ORES WITH REFERENCE TO THE RETREATMENT OF THE TORCO TAILINGS M.C. COSTELLO, I.C. RITCHIE and D.J. LUNT Minproc Engineers Pty Ltd, PO Box 403,

More

COPPER(II) EXTRACTION FROM AMMONIA LEACH

2013-9-7  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 ammonia systems as a cationic amminacomplexes. Alkalinity of the solution and free

More

Selective leaching of copper and zinc from primary ores ...

2021-2-5  Abiotic factors (ammonia speciation and pH) were assessed by using different synthetic ammonia species on copper leaching from the ASR using 1 mol L −1 total ammonia. NH 4 Cl and NH 4 OH were added as pure solutions, whilst for pH modifications, NH 4 HCO 3 was mixed with NH 4 OH to create a pH range of 8.8–9.3.

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Leaching of copper and zinc from the tailings sample ...

2019-12-21  This research was aimed to investigate the leaching behavior of zinc and copper from a porcelain stone tailings sample using RSM-CCD modeling. The synergetic and individual effects of five main factors including liquid/solid ratio, sulfuric acid concentration, agitation speed, leaching time, and temperature were examined on the recoveries of zinc and copper. For this purpose, two 2F1 models ...

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The selective leaching of copper from a gold–copper ...

2020-12-11  gold leaching either using the same process at elevated temperature (40–60 °C), as patented by the authors, or using a cyanidation process. Copper selective leaching will reduce the gold losses due to a cementa-tion mechanism of gold in the presence of metallic copper as all of the metallic copper will dissolve in the pre-leaching stage.

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Ammonia leaching of tailings from a copper mine - 百度学术

In order to comprehensively recover copper from a copper mine, the process of copper recovery from tailings by ammonia leaching is investigated. The results show that the optimal condition is 1:1.6 quality ratio of tailings and 25%~28% ammonia solution, 30℃ leaching temperature, 16d leaching period, 0.22mol/L assistant addition.

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Recovery of Copper from Ammoniacal Leachates by Ion ...

2021-4-27  Copper and zinc extraction by ammoniacal leaching from microwave-roasted Cu-Zn-Pb sulfidic tailings followed by recovery of copper and zinc by ion flotation and precipitation. Introduction Tailings are mixtures of fine-grained unwanted fractions

More

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 concentration, solid‐to‐liquid ratio, stirring speed, and ...

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Metals Free Full-Text Copper Recovery and Reduction of ...

Selective extraction of copper from tailings was successively investigated by Turan et al. using a mixture of ammonia salts as leaching reactants and managed to obtain a copper recovery of 91.47% with no iron tenors to the leachate after 6 h of leaching at 30 °C.

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Common Copper Tailings Reprocessing Methods - Xinhai

2020-11-16  The leaching of copper tailings is to convert the solid phase copper compound into the copper ion in the liquid phase, and then extract the metallic copper from the leaching solution. According to different leaching reagents, it can be divided into acid leaching, ammonia leaching, bacterial leaching, and electrochemical leaching. In the follow ...

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Ammonia Leaching: A New Approach of Copper Industry

2013-12-10  Z. Guo-dong, L. Qing, Leaching of copper from tailings using carbonate compound, commercially adopted in Nicaro in ammonia–ammonium chloride solution and its dynamics. Inter- Cuba, Marinduque in the Philippines and Queensland in national conference on chemistry and chemical engineering Australia [38].

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Optimal Conditions for Ammonia Leaching of Copper ...

2019-7-1  Ammonia leaching can be used in non-oxidative, oxidative and reductive leaching [16]. The ammonia leaching process is more environment friendly than conventional acid heap leaching, which uses sulphuric acid to dissolve copper and cobalt [11]. The reported difficulty encountered with the ammonia leaching approach, however,

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Leaching of copper and zinc from the tailings sample ...

This research was aimed to investigate the leaching behavior of zinc and copper from a porcelain stone tailings sample using RSM-CCD modeling. The synergetic and individual effects of five main factors including liquid/solid ratio, sulfuric acid concentration, agitation speed, leaching time, and tem

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Ammoniacal thiosulphate leaching of gold ore

2016-6-2  concentration. The leaching is improved significantly at a particular ratio of ammonia to thiosulphate concentration and that ratio varies from ore to ore. Copper ions act as an oxidant and the gold dissolution increases substantially in the presence of them. The gold leaching is minimum in the presence of an inert

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The selective leaching of copper from a gold–copper ...

2020-12-11  gold leaching either using the same process at elevated temperature (40–60 °C), as patented by the authors, or using a cyanidation process. Copper selective leaching will reduce the gold losses due to a cementa-tion mechanism of gold in the presence of metallic copper as all of the metallic copper will dissolve in the pre-leaching stage.

More
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