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  • Leaching of copper from tailings using ammonia/ammonium ...

    Aug 03, 2010  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/liquid ratio and temperature were investigated.

  • (PDF) Copper recycle from sulfide tailings using combined ...

    Copper recycle from sulfide tailings using combined leaching of ammonia solution and alkaline bacteria Article (PDF Available) in Journal of Cleaner Production 189 April 2018 with 474 Reads

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

    Jun 03, 2020  The highest copper extraction efficiency was obtained in the leaching process that was conducted with the solutions obtained by mixing ammonia salts in the best conditions. Accordingly, as a result of 6 h of leaching at 30 °C in the presence of 22.5% NH4OH and 100 g/L (NH4)2S2O8, 91.47% of the copper was transferred into the solution, while ...

  • Author: M. Deniz Turan, Ramazan Orhan, Mücevher Turan, Hasan Nizamoğlu
  • Copper recycle from sulfide tailings using combined ...

    Ammonia leaching from copper sulfide tailings. A 30-days ammonia leaching experiments of sulfide tailings with different concentration of ammonia was carried out in a sterile environment. Changes in the key parameters (i.e., pH and Cu extraction rate) ...

  • Cited by: 15
  • leaching of copper from tailings using ammonia

    A NEW PROCESS FOR COPPER LEACHING ... - Assiut University. Nov 6, 2014 ... (5) The presence of copper in tailings stabilizes the weak acid .... leaching copper before gold using acid followed by cyanidation of the leach ... Ammonia poses environmental and toxic problems both as a

  • leaching of copper from tailings using ammonia

    Leaching of copper from tailings using ammonia/ammonium chloride solution and its dynamics 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

  • Leaching of copper from tailings using ammonia/ammonium ...

    The first ammonia leaching plants, applied to copper carbonate and native copper tailings in 1915, were followed more recently by research and development of flowsheets for ammonia leaching of ...

  • leaching of copper from tailings using ammonia

    leaching of copper from tailings using ammonia leaching of copper from tailings using ammonia Leaching kinetics of low-grade copper ore with high . waste rocks, tailings, etc, which were abandoned before Ammonia-ammonium sulphate leaching for copper ores has some advantages over other leaching reagents. Read more

  • Leaching kinetics of copper flotation tailings in aqueous ...

    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

  • (PDF) Ammonia Leaching: A New Approach of Copper Industry ...

    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 ammonia leaching of copper-and zinc ...

  • leaching of copper from tailings using ammonia

    leaching of copper from tailings using ammonia - , leaching of copper from tailings using ammonia 2008-06-13 BWZ Heavy Duty Apron Feeder BWZ series heavy duty apron feeder designed by SKT is one new type high .

  • Experimental research in leaching of copper-bearing ...

    Mar 01, 2008  The University of South China has carried out some experimental research on recovering copper tailings. Wu Heng-shan and some other investigators have made leaching experiments of copper tailings by using acid and ammonia separately and shown the feasibility of secondary recovery of copper tail-ings[2].

  • leaching of copper from tailings using ammonia

    leaching of copper from tailings using ammonia leaching of copper from tailings using ammonia Leaching kinetics of low-grade copper ore with high . waste rocks, tailings, etc, which were abandoned before Ammonia-ammonium sulphate leaching for copper ores has some advantages over other leaching reagents. Read more

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

    tailings using . ammonia/ammonium chloride . solution and its dynamics ... kinetic study of copper ammonia leaching and evaluation of Eh–pH diagrams in a system containing water and ammonia are ...

  • Leaching of Gold-Copper Ores Using Ammoniacal Cynide -

    Many of these problematical gold-copper ores could possibly be processed economically for gold recovery using a novel ammoniacal cyanide leaching system which utilises a copper-ammonia-cyanide complex as an effective lixiviant for gold, yet limits copper dissolution and conserves cyanide.

  • copper tailing processing by leaching process

    Leaching Of Copper From Tailings Using Ammonia. Our company mainly producing and selling machines like jaw crusher, ball mill, sand maker, sand washing machine, mobile crushing plant.Leaching of copper from tailings using ammonia Establishing a special research and development base and taking technological innovation as our main duty help us always taking the lead in the field of China

  • Industrial application of ammonia-assisted cyanide ...

    The use of ammonia to reduce the consumption of cyanide during the leaching of gold from copper-bearing ores was patented in 1902 by Hunt (1902), during the first period of intense RD activity in gold metallurgy that followed the invention of the cyanide process by J.S. MacArthur and the Forrest brothers in the late 1880s. The ammonia-cyanide ...

  • Leaching of silver contained in mining tailings, using ...

    We execute a kinetics study of silver leaching from tailings, using thiosulfate. • Reaction orders are 1 (oxygen), 0.07 (thiosulfate), 0.45 (pH) and 0.26 (copper). • The activation energy in the range of temperatures 288–328 K was 1.91 kJmol − 1. • The kinetics is controlled by, mass transfer of oxygen, in the solid–liquid surface

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

    Oct 01, 1992  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,

  • A REVIEW OF COPPER CYANIDE RECOVERY FOR THE

    insoluble. There have been a number of studies into the application of the copper/ammonia/ cyanide process for the treatment of copper-containing ores (6, 7). It has been shown that the addition of ammonia to the cyanide solution results in a lower cyanide consumption and an increased selectivity of gold leaching over copper.

  • Leaching of copper from tailings using ammonia/ammonium ...

    The main important parameters in ammonia leaching of copper tailings have been prioritized as solid/liquid ratio, leaching time, temperature and the concentration of ammonia. The optimum leaching conditions are found to be: 4/1 liquid/solid ratio, 4h leaching time, 40°C, 3 mol/L NH4 +. More than 75% of copper was effectively recovered.

  • Response Surface Methodology for Optimization of Copper ...

    flotation copper tailings. The proportion of the refractory combination oxide copper (chrysocolla) is ... Leaching can be divided into two types, namely, acid leaching and ammonia leaching [7,8], named after the leaching agent employed. Acid and ammonia leaching are suitable for treating the . Minerals 2018, 8, 165 2 of 13

  • Leaching kinetics of copper flotation tailings in aqueous ...

    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

  • Ammonia Leaching: An Alternate Route for Copper Recovery ...

    The use of ammonia as a leaching agent in the recovery of copper from ores and concentrates has a number of potential benefits. These include the ability to treat ores with an acid consuming gangue, non-corrosivity, the insolubility of iron in the solution and increased selectivity. This paper reviews the previous and current use of...

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

    Oct 01, 1992  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,

  • Leaching of Gold-Copper Ores Using Ammoniacal Cynide -

    Many of these problematical gold-copper ores could possibly be processed economically for gold recovery using a novel ammoniacal cyanide leaching system which utilises a copper-ammonia-cyanide complex as an effective lixiviant for gold, yet limits copper dissolution and conserves cyanide.

  • Ammonia Leaching: An Alternate Route for Copper Recovery ...

    The use of ammonia as a leaching agent in the recovery of copper from ores and concentrates has a number of potential benefits. These include the ability to treat ores with an acid consuming gangue, non-corrosivity, the insolubility of iron in the solution and increased selectivity. This paper reviews the previous and current use of...

  • Leaching of copper from tailings using ammonia/ammonium ...

    The main important parameters in ammonia leaching of copper tailings have been prioritized as solid/liquid ratio, leaching time, temperature and the concentration of ammonia. The optimum leaching conditions are found to be: 4/1 liquid/solid ratio, 4h leaching time, 40°C, 3 mol/L NH4 +. More than 75% of copper was effectively recovered.

  • The Plant Of Copper Leaching With Ammonia

    Leaching Of Copper From Tailings Using Ammonia. Our company mainly producing and selling machines like jaw crusher, ball mill, sand maker, sand washing machine, mobile crushing plant.Leaching of copper from tailings using ammonia establishing a special research and development base and taking technological innovation as our main duty help us ...

  • Response Surface Methodology for Optimization of Copper ...

    Response surface methodology is used to optimize the leaching process for refractory flotation copper tailings. The proportion of the refractory combination oxide copper (chrysocolla) is 64.84%. At present, few studies have examined the leaching of chrysocolla. In this study, we examine the effects of several variables, including the amount of concentrated sulfuric acid, leaching temperature ...

  • Leaching kinetics of copper flotation tailings in aqueous ...

    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

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

    ores with ammonia–cyanide, and their plant control and operation has been published by Muir (2011). The application of cyanide–ammonia system to leach gold over copper from oxidised ores has been tested successfully using different gold–copper ores (Drok and Ritchie, 1997; La Brooy et al., 1991; Muir et al., 1989). However, this system in the

  • Eliminating Copper from Gold Ore

    It was in use before for treating amalgamation tailings. This material contained a few pounds of copper per ton, present mostly as oxide. In its treatment, it was found necessary to use 8 lb. of caustic ammonia per ton of solution. The strength of the cyanide was 0.05%.

  • Copper Leaching Method - Metallurgist Mineral Processing ...

    In leaching roasted mill tailings the consumption of acid appears to be small—about 50 lb. acid per ton of tailings handled—even with very fine material. This illustrates the benefit derived from roasting substances containing colloids, such as mill slimes, when the copper

  • An Investigation of the Selective Leaching of Gold Over ...

    selective leaching of the gold by an ammoniacal cyanide solution, a method first described by Hunt in 1901. This method is already in commercial use in Mauritania, treating copper/gold tailings. In general terms, the addition of I – 2 g U1 ammonia to a standard cyanide leach solution causes a significant increase in gold extraction and ...

  • AmmLeach A New Paradigm in Copper Cobalt Processing

    Typical reductive acid flowsheet for copper-cobalt ores using SO 2 as the reductant. The tailings are separated and the acidic pregnant leach solution (PLS), which contains high levels of a range of different metals, passes to copper removal using solvent extraction (SX). The copper-free ... The use of an ammonia-based leach can be expected to ...

  • Leaching of Malachite Ore in NH3-Saturated Water ...

    Jun 24, 2004  In this study, the leaching kinetics of malachite [CuCO3Cu(OH)2], an oxidized copper ore, was investigated in water saturated with ammonia gas. In the experiments, the ammonia concentration of the solution, the particle size of the ore, the temperature, the stirring speed, and the solid-to-liquid ratio were chosen as parameters. It was determined that the leaching rate of malachite

  • Copper and cyanide recovery from barren leach solution at ...

    Problems created by CN‐soluble copper in leach solution Copper contamination of gold cyanidation circuits causes a number of problems in gold processing (Sceresini, 1999). Copper oxide minerals (i.e. azurite, malachite, cuprite, tenorite) have fast leaching rates in cyanide.

  • copper tailings refining plant - peterhulley.co.za

    Leaching of copper from tailings using ammonia - IEEE Xplore Electro Copper Refining - Elmhurst College Supervision of all process design during study and basic of SX plant to recover copper from ammonia leach solution (1972-74).

  • Response Surface Methodology for Optimization of Copper ...

    Response surface methodology is used to optimize the leaching process for refractory flotation copper tailings. The proportion of the refractory combination oxide copper (chrysocolla) is 64.84%. At present, few studies have examined the leaching of chrysocolla. In this study, we examine the effects of several variables, including the amount of concentrated sulfuric acid, leaching temperature ...

  • Leaching of Malachite Ore in NH3-Saturated Water ...

    Jun 24, 2004  In this study, the leaching kinetics of malachite [CuCO3Cu(OH)2], an oxidized copper ore, was investigated in water saturated with ammonia gas. In the experiments, the ammonia concentration of the solution, the particle size of the ore, the temperature, the stirring speed, and the solid-to-liquid ratio were chosen as parameters. It was determined that the leaching rate of malachite

  • Optimal Conditions for Ammonia Leaching of Copper ...

    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,

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

    ores with ammonia–cyanide, and their plant control and operation has been published by Muir (2011). The application of cyanide–ammonia system to leach gold over copper from oxidised ores has been tested successfully using different gold–copper ores (Drok and Ritchie, 1997; La Brooy et al., 1991; Muir et al., 1989). However, this system in the

  • Ammonia Leaching: A New Approach of Copper Industry in ...

    Dec 10, 2013  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 associated with acid leaching have resulted in a new approach in the world to this method.

  • AmmLeach A New Paradigm in Copper Cobalt Processing

    Typical reductive acid flowsheet for copper-cobalt ores using SO 2 as the reductant. The tailings are separated and the acidic pregnant leach solution (PLS), which contains high levels of a range of different metals, passes to copper removal using solvent extraction (SX). The copper-free ... The use of an ammonia-based leach can be expected to ...

  • Copper Leaching Method - Metallurgist Mineral Processing ...

    In leaching roasted mill tailings the consumption of acid appears to be small—about 50 lb. acid per ton of tailings handled—even with very fine material. This illustrates the benefit derived from roasting substances containing colloids, such as mill slimes, when the copper

  • Acid Leaching - Copper Ore Treatment Method

    PREPARATION OF THE COPPER ORE. This study is limited in general to percolation leaching as it is the most widely used method to give proper contact of solvent with the ore to effect extraction of the copper. One of the important factors in percolation leaching is the size reduction necessary for copper recovery within reasonable time limits.

  • Copper and cyanide recovery from barren leach solution at ...

    Problems created by CN‐soluble copper in leach solution Copper contamination of gold cyanidation circuits causes a number of problems in gold processing (Sceresini, 1999). Copper oxide minerals (i.e. azurite, malachite, cuprite, tenorite) have fast leaching rates in cyanide.

  • The Plant Of Copper Leaching With Ammonia

    Leaching Of Copper From Tailings Using Ammonia. Our company mainly producing and selling machines like jaw crusher, ball mill, sand maker, sand washing machine, mobile crushing plant.Leaching of copper from tailings using ammonia establishing a special research and development base and taking technological innovation as our main duty help us ...

  • An Investigation of the Selective Leaching of Gold Over ...

    selective leaching of the gold by an ammoniacal cyanide solution, a method first described by Hunt in 1901. This method is already in commercial use in Mauritania, treating copper/gold tailings. In general terms, the addition of I – 2 g U1 ammonia to a standard cyanide leach solution causes a significant increase in gold extraction and ...

  • Thesis copper recycle from sulfide tailings using combined ...

    Thesis copper recycle from sulfide tailings using combined leaching of ammonia solution and alkaline bacteria - 6588141

  • copper leaching 26 - soireeplage.be

    LEACHING OF FLOTATION TAILINGS - Univerzitet u Zenici. leaching process has no significant effect on degree of copper. Optimum leaching time is 4 h. Based on the results, shown in Figure 4, the optimal ratio of S:L for the copper leaching process from flotation tailings is 1:2.5. The highest degree of copper leaching of 56% was achieved in the ...