Blog Center
  1. Home >
  2. Blog >
  3. Blog Detail
Blog Show

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

  • US4165264A - Ammonia leaching - Google Patents

    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 carbonate; the leach liquor is heated to form gaseous ammonia and carbon dioxide; the leach liquor is treated with a strongly alkaline

    Get Price
  • The Effect of Leaching Time and Ammonia

    The Effect of Leaching Time and Ammonia

    of copper in their investigation on the oxidative ammonia/ammonium sulphate leaching of a complex synthetic matte (Cu-Ni-Fe-Co). Chang and Liu studies on the feasibility of copper leaching from industrial sludge using ammonia solutions managed to recover 94% of copper

    Get Price
  • Ammonia leaching - Phelps Dodge Corporation

    Ammonia leaching - Phelps Dodge Corporation

    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 carbonate; the leach liquor is heated to form gaseous ammonia and carbon dioxide; the leach liquor is treated with a strongly alkaline

    Get Price
  • TREATMENT OF A COPPER - RICH GOLD ORE BY

    TREATMENT OF A COPPER - RICH GOLD ORE BY

    improved to 90%. Similarly, the pretreatment of the ore by ammonia leaching was shownto lead to high gold extractions (98%), in subsequent cyanide leaching with significant reductions in the consumption of cyanide. This appeared to be linked with the ready dissolution/removal of copper during ammonia leaching

    Get Price
  • Behavior of Copper Dissolution in an Ammonia Solution

    Behavior of Copper Dissolution in an Ammonia Solution

    The leaching speed of copper in an ammonia solution containing ammonium chloride was higher than that in an ammonia solution containing ammonium sulfate. Key words Copper Dissolution, Ammonia Solution, Waste, Leaching, Hydrometallurgical Process 1. Introduction The metals recovery from waste materials is important for

    Get Price
  • A novel and efficient ammonia leaching method for

    A novel and efficient ammonia leaching method for

    Apr 01, 2020 A novel and efficient ammonia leaching method for recycling waste LIBs is proposed in this study. The leaching system selected in this study is composed of NH 3 H 2 O–NH 4 HCO 3 and Na 2 SO 3. This is because, on the one hand, NH 4 HCO 3 forms a relatively stable buffer system with NH 3 H 2 O, providing a suitable condition for leaching

    Get Price
  • Kinetics and Mechanism of Copper Dissolution in Aqueous

    Kinetics and Mechanism of Copper Dissolution in Aqueous

    Susumu Morioka, Kazuyoshi Shimakage, Studies on the Ammonia Pressure Leaching of Metallic Nickel and Copper Powders, Transactions of the Japan Institute of Metals, 10.2320/matertrans1960.12.197, 12, 3, (197-205), (1971)

    Get Price
  • The Principles and Applications of Ammonia Leaching of

    The Principles and Applications of Ammonia Leaching of

    Mar 26, 2008 Eh-pH diagrams of various metal-ammonia-water systems are presented. Also presented is a comprehensive literature survey on the leaching behavior of metals in ammoniacal solutions. The metals considered in this paper are copper, cobalt, nickel, zinc, cadmium, silver, gold and palladium

    Get Price
  • Precious metals recovery from waste printed circuit boards

    Precious metals recovery from waste printed circuit boards

    Jun 01, 2019 Ammonia joint copper ions form the copper tetramine complex which acts as homogeneous catalyst in gold leaching with thiosulfate solutions. In addition, ammonia is employed for copper stabilization and for the prevention of thiosulfate decomposition (Akcil et al., 2015; Aylmore et al., 2014; Grosse et al., 2003; Zhang et al., 2012

    Get Price
  • Ammonia/nitric Acid Leaching of Copper- Cobalt

    Ammonia/nitric Acid Leaching of Copper- Cobalt

    the best leaching efficiency for copper, in their feasibility of copper leaching from an industrial sludge using ammonia solution. This present work will develop the effect of nitric acid/ammonia ratio on the leaching of rich - cobalt copper oxidised ore. It will also evaluate the effect of key parameters (time, ammonia concentration, and pH

    Get Price
  • CA1153984A - Ammonia leaching - Google Patents

    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 contains ammonia complexes of copper sulfate and copper carbonate; the leach liquor is heated to form gaseous ammonia and carbon dioxide; the leach

    Get Price
  • Refining of Nickel Copper Cobalt Mattes by Pressure

    Refining of Nickel Copper Cobalt Mattes by Pressure

    Jun 05, 2020 The ammonia and water vapours were condensed and recycled to the leach feed. Copper was removed from the solution by precipitation as a sulphide, using the sulphur dioxide – sulphur process developed by Sherritt Gordon. The copper product, at 55 – 60% Cu and 35 – 40% S was suitable for smelting in an adjacent smelter

    Get Price
  • Minerals | Free Full-Text | Effective Removal of Barrier

    Minerals | Free Full-Text | Effective Removal of Barrier

    E. Muzenda et al. conducted an experimental study on oxidized ammonia leaching of nickel-copper matte under atmospheric pressure, and the leaching efficiencies of nickel and copper were less than 50% . G. Chen et al. carried out FeCl 3-HCl leaching experiments on low-nickel matte

    Get Price
  • COPPER(II) EXTRACTION FROM AMMONIA LEACH

    COPPER(II) EXTRACTION FROM AMMONIA LEACH

    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

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

    (PDF) Ammonia Leaching: A New Approach of Copper

    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

    Get Price
  • Copper extraction from the ammonia leach liquor of spent

    Copper extraction from the ammonia leach liquor of spent

    May 01, 2020 A novel process to remove copper from the ammonia leaching solution of spent lithium ion battery was developed by using LIX984 dissolved in 260 # kerosene as extractant. The pH is a key factor affecting the extraction Cu and other coexisting ions (Li, Co, and Ni)

    Get Price
  • Ammonia leaching of slag from direct-to-blister copper

    Ammonia leaching of slag from direct-to-blister copper

    Aug 25, 2020 Ammonia leaching of slag from direct-to-blister copper smelting technology. Smelting of copper concentrates in a flash furnace directly into a copper blister results in the production of slag with high copper and lead content. The recovery of these metals is carried out in an electric furnace, from which copper–lead–iron metallic alloy is

    Get Price
  • Effect of Preliminary Alkali Desilication on Ammonia

    Effect of Preliminary Alkali Desilication on Ammonia

    Ammonia leaching is a promising method for processing low-grade copper ores, especially those containing large amounts of oxidized copper. In this paper, we study the effect of Si-containing minerals on the kinetics of Cu and Ag leaching from low-grade copper concentrates. The results of experiments on the pressure leaching of the initial copper concentrate in an ammonium/ammonium-carbonate

    Get Price
  • SciELO - Brasil - LEACHING OF MALACHITE ORE IN

    SciELO - Brasil - LEACHING OF MALACHITE ORE IN

    In ammonia leaching of oxidized copper ores, as the dissolution reactions happen at mildly acidic or basic conditions, some metal impurities, which pass into the solution during the dissolution of ore, precipitate because of the high pH of the solution. Besides, ammonia forms stable complexes with copper ions, and this can lead to an increase

    Get Price

Latest Blog

toTop
Click avatar to contact us