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ammonia leaching of copper ore in romania

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ammonia leaching of copper ore in romania

Abstract The alkaline leaching behaviour of rich copper cobalt oxidised ore from Katanga has been investigated Copper was leached in ammonianitric acid solution at room temperature The effects of time ammonia concentration nitric acid ammonia ratio and pH on the leaching kinetic of copper were investigated Nitric acid was considered as catalytic element to enhance copper leaching kinetic

  • Ammonianitric Acid Leaching of Copper Cobalt
    Ammonianitric Acid Leaching of Copper Cobalt

    Abstract The alkaline leaching behaviour of rich copper cobalt oxidised ore from Katanga has been investigated Copper was leached in ammonianitric acid solution at room temperature The effects of time ammonia concentration nitric acid ammonia ratio and pH on the leaching kinetic of copper were investigated Nitric acid was considered as catalytic element to enhance copper leaching kinetic

  • Novel treatment for mixed copper ores Leaching ammonia
    Novel treatment for mixed copper ores Leaching ammonia

    Apr 01 2020 · The procedure involves three stages i leaching with aqueous ammonia solutions at room temperature and varied pH ammonia concentration solid concentration and particle size ii PLS precipitation in copper sulfides by the addition of sulfur or other copper sulfates and SO 2 or additional sulfites or bisulfites iii froth flotation to recover the value sulfide considering a set of collectors

  • PDF Ammonia Leaching A New Approach of Copper
    PDF Ammonia Leaching A New Approach of Copper

    Oct 06 2020 · Stanislav Naboichenko Ammonia leaching is a promising method for processing lowgrade copper ores especially those containing large amounts of oxidized copper In

  • TREATMENT OF A COPPER  RICH GOLD ORE BY
    TREATMENT OF A COPPER RICH GOLD ORE BY

    TREATMENT OF A COPPER RICH GOLD ORE BY AMMONIA ASSISTED CYANIDE LEACHING Figure 4 Effect of PbNO 3 2 on the extraction of gold NaCN 15 gL The pretreatment of the ore by ammonia 1 M was therefore investigatedin an attempt to remove easily solubilised copper

  • Leaching of copper from tailings using ammoniaammonium
    Leaching of copper from tailings using ammoniaammonium

    Aug 03 2010 · The main important parameters in ammonia leaching of copper tailings have been prioritized as solidliquid ratio leaching time temperature and the concentration of ammonia The optimum leaching conditions are found to be 41 liquidsolid ratio 4h leaching time 40°C 3 molL NH4 More than 75 of copper was effectively recovered The dynamical equation of ammonia leaching

  • Characterization and kinetic study on ammonia leaching
    Characterization and kinetic study on ammonia leaching

    studies on copper recovery by ammonia leaching were carried out with sulphide concentrates or oxide ores but this route was never tested for a complex Cu ore which has neither sulfide nor oxide as the major matrix Hence in the present study such a complex Cu ore was selected and after mineralogical characterization ammonia leaching kinetics was studied Main influencing factors

  • Characterization and kinetic study on ammonia leaching of
    Characterization and kinetic study on ammonia leaching of

    May 01 2014 · In general the major advantage of ammonia leaching process lies in its selectivity towards copper since ammonia forms soluble ammine complex with Cu ions and iron is completely rejected as iron oxides Aqueous ammonia as a leaching agent is fairly noncorrosive and leaching reactions occur in relatively mild conditions

  • Processing CopperGold Ores with Ammonia or Ammonia
    Processing CopperGold Ores with Ammonia or Ammonia

    Direct cyanidation extracted both copper and gold but consumed about 30 kgt 1 NaCN Preleaching the tailing with an aerated ammonia solution containing 28 kgt 1NH3 and 17 kgtlNHa2S0a at pH 10 readily extracted up to 95 Cu in about 6 hours under optimum conditions However pH and total ammonia concentration were critical factors

  • COPPERII EXTRACTION FROM AMMONIA LEACH
    COPPERII 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

  • Ammoniacal thiosulphate leaching of gold ore
    Ammoniacal thiosulphate leaching of gold ore

    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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