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Leaching of copper from tailings using ammonia

  • Eliminating Copper from Gold Ore

    Oct 11, 2015· 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-Ammonia Complex Chemdemos

    Copper-Ammonia Complex . When concentrated ammonia solution (ammonium hydroxide) is added to a clear, light blue, aqueous solution of copper(II) chloride, a powdery, light blue precipitate of copper(II) hydroxide forms. Further addition of ammonia causes the copper ion to go back into solution as a deep blue ammonia complex.

  • Leaching of Trace Amounts of Metals from Flotation

    Oct 25, 2018· With decreasing ore grades, the tailings of mining operations are becoming of increasing interest as metal-containing secondary raw materials. The objective of the current work was to investigate chloride leaching of gold, copper, cobalt, nickel, and zinc present in the flotation tailings. In the current study, the effect of cupric ion as an oxidant (050 g/L) and NaCl (150250 g/L) on

  • 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.

  • Selective leaching of copper and zinc from primary ores

    Feb 05, 2021· 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 8.89.3.

  • Selective leaching of copper and zinc from primary ores

    For the majority of materials, moderate to high yields (3070%) and very high selectivity (>97% against iron) of copper and zinc were obtained with 1 mol L1 total ammonia. Optimal leaching was achieved and further refined for the ASR in a two-step indirect leaching system with biogenic ammonia.

  • Leaching of copper from tailings using ammonia/ammonium

    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

  • LEACHING OF MALACHITE ORE IN AMMONIUM SULFATE

    Abstract. Malachite ore is one of the most important of oxidized copper ores. Copper production can be performed by using this ore. In this work, the leaching kinetics of malachite in ammonium sulfate solutions was investigated, and metallic copper was recovered by a cementation method from the resulting actual leach solution.

  • Response Surface Methodology for Optimization of

    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

  • Treatment of copper-rich gold ore by cyanide leaching

    leaching, ammonia leaching has the merits of high selectivity over gang minerals, low corrosivity and application in alkaline conditions [8]. MUIR et al [8] demonstrated the removal of copper (up to 95%) from an oxidised tailings via ammonia leaching, which resulted in a substantially reduced reagent consumption (from 30

  • AMMONIA PRESSURE LEACHING FOR LUBIN SHALE

    monia pressure leaching of Lubin shale middlings - tailings from 1 st cleaning at Lubin Concentrator. Ammonia pressure leaching of Lubin shale middlings was selected as an alterna-tive to acidic - atmospheric and pressure leaching. Ammonia leaching was expected to be applied without a need of carbonates acidic decomposition, as it was necessary for

  • Acid Leaching - Copper Ore Treatment Method

    May 23, 2017· 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.

  • 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

  • (PDF) Treatment of a Copper-Rich Gold Ore by Ammonia

    The ammoniacyanide leach system was first patented over 100 years ago and stands out as a unique method of selectively leaching up to 90% Au and <1% Cu from oxidised coppergold ores using

  • Industrial Application of Ammonia Assisted Cyanide

    ammonia in the industrial leaching plant is described. In the plant it was found that the extraction of copper was halved by the use of ammonia, thus leading to significant reductions in the amount of cyanide consumed in the full-scale leaching system. KEYWORDS Gold-copper ore treatment. Gedabek mine, Azerbaijan. Resin-in-pulp process

  • 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].

  • The selective leaching of copper from a goldcopper

    gold leaching either using the same process at elevated temperature (4060 °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.

  • Leaching of copper from tailings using ammonia/ammonium

    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

  • Copper Leaching from Refractory Flotation Tailings

    Apr 18, 2018· Copper Leaching from Refractory Flotation Tailings Xu Bai 1,2, 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 copper tailings are extracted using concentrated sulfuric acid under high temperature

  • 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.

  • 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

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

    Ammonia and ammonium salts have been recognized as effective leaching agents in hydrometallurgical processes due to low toxicity and cost, easy recovery and

  • US8597399B2 - Method for thiosulfate leaching of precious

    Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polythionates, inert atmospheres to control polythionate production, and electrolytic solutions which provide relatively high rates of

  • (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 EhpH diagrams in a system containing water and ammonia are

  • An Investigation into the Effect of Temperature on the

    the temperature and the reaction involved on the leaching of copper-matte. Copper (Cu) bearing matte from Impala Refinery (Pty) Ltd was used in the investigation. The experiments were conducted in a leaching cell submerged in a water bath, with ammonia concentrations (leaching solution) of 3.0M, temperature of 50˚C, the residue or tailings

  • LEACHING OF MALACHITE ORE IN AMMONIUM SULFATE

    method, copper in the leach solution is first taken up in the organic phase by using copper-selective ex-tractants in the extraction step of the process. After-wards, the organic phase loaded with copper is sub-jected to the stripping operation with a strong acid, and copper is transferred from the organic phase to the aqueous phase.

  • Experimental Study of the Sulphatizing Roasting of

    Mar 01, 2021· Yin S, Wang L, Wu A, Kabwe E, Chen X and Yan R 2018 Copper recycle from sulfide tailings using combined leaching of ammonia solution

  • RECOVERY OF COPPER FROM COPPER SLAG AND COPPER

    Recovery of copper from copper slag and copper slag flotation tailings 75by oxidative leaching Table 1. Chemical compositions of the copper smelter slag and the slag flotation tailings Constituent Content (wt.%) Copper Slag Slag Flotation Tailings Cu total 0.97 0.59 Cu oxides 0.15 0.06 Cu sulphides 0.82 0.53 SiO 2 33.75 34.62 Al 2 O

  • Copper recycle from sulfide tailings using combined

    Comparison of ammonia leaching, bioleaching and combined leaching is researched. Thus, in this study, to recover valuable metals and reduce pollution, a cleaner metal extraction method from copper sulfide tailings using a combined leaching method employing ammonia solution and a novel strain of alkaline bacteria under alkaline condition was

  • leaching of copper from tailings using ammonia

    Ammonia Leaching: A New Approach of Copper Industry in . The use of sulfuric acid in an acid leaching process is a . on ammonia leaching of sulfide ores was also considered. .. Leaching of copper from tailings using. Read More

  • Recovery of Copper from E-waste Using Ammonia-based Process

    As a question, are you aware that copper recovery from e-waste using ammonia leaching was (is?) practiced by Peninsula Copper Inc in Hubble, MI for 20+ years. This plant was the old Calumet and Hecla tailings leach recovery plant started up in 1917 and

  • Common Copper Tailings Reprocessing Methods - Xinhai

    Nov 16, 2020· 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.

  • 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.

  • 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

  • ammonium carbonate leaching of copper

    Leaching kinetics of copper flotation tailings in aqueous . The use of ammonium carbonate for the extraction of metals such as copper and nickel is well known Less well known is the fact that ammonium carbonate extraction was used for the commercial recovery of zinc decades before its application to either copper or nickel This article reviews

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

    Ammonia leaching was first used f or recovery of non-ferrous metals such as copper from oxide ores or ores containing pure cop per, but gradually the us e of this technolog y was de veloped from m

  • Copper Leaching Behavior from Waste Printed Circuit Board

    reported the selective leaching of copper from motor scraps using cupric ammine solutions.1,2) Zhou et al. studied the 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 product, and then metallic copper would be electrowon from

  • Selective leaching of copper and zinc from primary ores

    Hydrometallurgy studies using ammonia have also focussed on high temperature and pressures to optimise leaching of copper sulfides, which also requires an oxidative step to break the copper sulfide bond and liberate sulfate (68) (Yin et al., 2018). CuS + 2O 2 + 4NH 3

  • 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,

  • ammonium carbonate leaching of copper

    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 . More

  • COPPER(II) EXTRACTION FROM AMMONIA LEACH SOLUTION

    Extraction of copper(II) was performed with the use of chosen extractants diluted in aliphatic diluent Exxsol D80. The concentration of extractants in the organic phase was equal to 10% (v/v). The pregnant leach solution from ammonia leaching was used as an aqueous phase. Extraction was performed at ambient temperature. Aqueous (A)