copper leaching ammonium carbonate

  • LEACHING OF MALACHITE ORE IN AMMONIUM SULFATE …

    Leaching of Malachite Ore in Ammonium Sulfate Solutions and Production of Copper Oxide 157 Brazilian Journal of Chemical Engineering Vol. 32, No. 01, pp. 155 - 165, January - March, 2015 of various methods, such as precipitation, crystalli-zation, and evaporation. Gaining of copper from

  • Ammonium carbonate - Wikipedia

    Ammonium carbonate is a salt with the chemical formula (NH 4) 2 CO 3. Since it readily degrades to gaseous ammonia and carbon dioxide upon heating, it is used as …

  • Secondary Copper Converter Dust Metal Recovery using ...

    The leach residue, enriched from 4.3 to 10.4 pct Sn, could find a ready market; the metallic cement product can be recycled back to the copper converter; and the high-purity ZnO product can be sold in several markets, leaving no material for disposal.

  • The leaching of metal sulfides in ammoniacal carbonate ...

    The rate of copper leaching shows that the surface reaction model applies best to this system. The activation energy was 11.5 kJ/mol at 25 °C and 57.6 kJ/mol at 60 °C. The reaction order with respect to ammonia was 1.9 and for ammonium carbonate it was 4.0. The leaching kinetic data for cobalt from monometallic cobalt sulfide, showed that the

  • Metal recovery from secondary copper converter dust by ...

    Metal recovery from secondary copper converter dust by ammoniacal carbonate leaching. [Robert C Gabler; Jack R Jones] ... Metal recovery from secondary copper converter dust by ammoniacal carbonate leaching. [Washington, D.C.] : United States Dept. of the Interior, Bureau of Mines, 1988 ... # Ammonium carbonate ...

  • NIOSHTIC-2 Publications Search - 10008787 - Improved ...

    Alternatives were developed to the conventional ammoniacal carbonate leaching-steam stripping procedure for recovering copper as an oxide from contaminated scrap metal. By entraining air bubbles in the leach solution, the copper dissolution rate was increased to 1.5 G/in2 of copper surface per hour, compared to 0.5 G/in2/hr produced by conventional agitation in stirred tanks.

  • Ammonia leaching - Phelps Dodge Corporation

    Aug 21, 1979· Preferably, the leaching step is carried out with an ammonium carbonate solution containing a molar excess of ammonium carbonate relative to copper, e.g., 20-50%, preferably about 30%, molar excess of ammonium carbonate, and containing free ammonia, e.g., 10-50 grams of ammonia per liter of leaching solution, preferably about 25 grams of ...

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

    After an initial reduction step with at 600°C, leaching at room temperature and atmospheric pressure with aqueous ammonia-ammonium carbonate and ammonia-ammonium sulfate solutions yielded high ...

  • Copper & Nickel Solvent Extraction

    Kennecott’s F.I.X. process also proposed the separation and recovery of nickel and copper from ammoniacal ammonium carbonate leach liquor with LIX 64N. The S.E.C. Corp. had commercially applied LIX 64N to the separation of nickel and copper from a copper tankhouse bleed stream (pH adjusted 8.5 to 9.0).

  • Comparison of various extractants for recovery of Copper ...

    Solvent extraction of copper from the copper leach solution obtained from the ammoniacal carbonate leaching of the Sarcheshmeh copper concentrate was carried out, and the performance of CP-150, LIX984N, and Kelex100 as well as the effects of different parameters involved were investigated. According to the results obtained, the extraction kinetics of all the three extractants was fast.

  • Study of the Dissolution of Chalcopyrite in Solutions of ...

    Literature on iron chemistry in ammonia–ammonium carbonate solutions is not widely documented for chalcopyrite leaching process, thus reference will be made to the Caron process. Studies have been carried out on the leaching of nickel from prereduced laterite ores (nickel and iron are present as

  • Leaching of chrysocolla with Ammonia-Ammonium …

    Leaching of Chrysocolla with Ammonia-Ammonium Carbonate Solutions M. MENA and E A. OLSON Chrysocolla was leached in solutions of ammonium hydroxide and ammonium carbonate as a …

  • Improved cupric ammonium carbonate leaching of copper ...

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  • ammonia-ammonium chloride leach copper minerals - BINQ …

    Nov 06, 2012· Dissolution kinetics of malachite in ammonia/ammonium carbonate …. Dissolution kinetics of malachite in ammonia/ammonium carbonate leaching … which is the unique copper mineral in the ore, …copper ore in ammonium chloride solution. »More detailed

  • AMMONIUM-CARBONATE LEACHING OF METAL VALUES FROM …

    Preferred leaching conditions were defined. With two-stage leaching at 50C in concentrated ammonium carbonate, the copper-plus-nickel content can be reduced to a level of less than 1 percent from an original content on the order of 10 percent.

  • COPPER(II) EXTRACTION FROM AMMONIA LEACH SOLUTION

    ammonia with a spent electrolyte can lead to formation of ammonium sulfate (carbonate or chloride) in liquors directed to electrowinning section. Crystallization of ... leach solutions (PLS), coming from leaching of copper sulfide concentrates. Some commercial extractants were examined, namely LIX 84-I, LIX 984N, LIX 54-100.

  • Complex electronic waste treatment – An effective process ...

    As given in Fig. 1, ammonium chloride shows the lowest copper leaching rate while copper is more favourable to be leached when ammonium carbonate is used than other ammonium salts (Temperature: 18 °C, ammonia content 7.8 wt.%, solid to liquid …

  • Ammonia/nitric Acid Leaching of Copper- Cobalt Oxidized …

    copper leaching from an industrial sludge using ammonia solution. ... Ammonia/nitric Acid Leaching of Copper- Cobalt Oxidized Ore Kalanga Gracias. Tshilombo, A.F. Mulaba-Bafubiandi ... malachite in ammonia ammonium carbonate l– eaching” Hydrometallurgy, vol. 76, issue 1-2, 2005,pp. 55-62.

  • 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 ...

  • Ammonia/nitric Acid Leaching of Copper- Cobalt Oxidized Ore

    copper leaching from an industrial sludge using ammonia solution. ... Ammonia/nitric Acid Leaching of Copper- Cobalt Oxidized Ore Kalanga Gracias. Tshilombo, A.F. Mulaba-Bafubiandi ... malachite in ammonia ammonium carbonate l– eaching” Hydrometallurgy, vol. 76, issue 1-2, 2005,pp. 55-62.

  • carbonate leaching of copper - saplgroup.in

    ammonia, ammonium carbonate, and copper ammonium carbonate (37). Perhaps, leaching copper oxide ores treated with a preliminary reducing roast is economically feasible. Get A Free Quote. ... Ammonium Carbonate Leaching Of Metal Values From Water ... (a) An ammoniumcarbonate leach system to extract copper from the sludge with the copper being ...

  • AMMONIA LEACHING IN THE COPPER INDUSTRY: A REVIEW

    ammonia/ammonium carbonate leaching ammonia/ ammonium (Bingol carbonate leaching ... Leaching of copper, zinc or molybdenum oxides, is of this type. Oxidative method: In this method, leaching ...

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