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Jun 22, 2019 The porphery-type gangue minerals dissolved at a relatively high rate as compared to the copper minerals. This resulted in a medium acid consumption, a well-defined upswing point in the incremental acid- consumption curve, and a lower recovery with the coarser ores. In the case of the ore with the iron oxide gangue, most of the acid was ...
Jul 21, 2016 The process is particularly suitable for ores containing acid-consuming gangue, concentrates with high arsenic or halide contents and for copper
Jul 17, 2018 Sodium sulfide is one of the most widely used alkali metal sulfides in the flotation of copper, lead, and zinc minerals in their oxidized form. The sulfidization process, developed in the U.S.A. in 1915-20 for oxide copper minerals flotation, is especially suitable for oxidized lead ores in which the gangue is usually basic.
Feb 05, 2021 Copper minerals leachable by inplace leaching are the same as those leachable by dump leaching, again since the leaching cycle is measured in years. Vat leaching principally employs the dissolution of copper oxide minerals by sulfuric acid from crushed, nonporous ore material that has been placed in confined tanks.
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Oct 09, 2010 The two main gangue minerals found in the Tio mine waste rocks are plagioclases and pyroxenes Plante et al. 2010a, and the waste rocks can contain up to approximately 7080 residual ilmenite ore.The dissolution mechanisms of these minerals and the formation of layered double hydroxides, which are believed to play an important role in the metal uptake of silicates, are reviewed
While the dissolution rates of the copper oxide minerals are markedly slower than acid leaching, the selective dissolution of copper over acid-consuming gangue minerals shows much potential. It was shown through UVVis spectroscopy that dissolved copper is in the cupric state and forms a neutral copper-glycinate complex under alkaline conditions.
May 28, 2017 There may be two types of gangue consuming acid. One can be treated independently from copper mineral. This is mainly responsible for acid consumption in later stages of leaching. The other is associated with the oxidized copper minerals. The behavior of the acid consumption, which may be described by the three stages, may be noted in Figure 3.
neutralization process acid consumption was calculated to be 90 gkg as against 128 gkg of ore as per theoretical calculation based on the ore analysis. The difference in acid consumption between the actual and theoretical one may be due to non-dissolution of acid consuming gangue mineral.
Carbonate minerals tend to be very acid consuming. As a result, ores which contain these minerals have traditionally required a lot of acid conditioning prior to biooxidation. Acid conditioning of these ores is required to remove or reduce the carbonate mineral component prior to biooxidation so that the biooxidation reaction can proceed.
A process for leaching an ore containing sulfidic copper-containing minerals includes carrying out an aerated oxidizing leach of a part of the ore and producing an acidic leach liquor containing ferrous ions, ferric ions, and copper ions in solution. The process also includes carrying out a leach of another part of the ore using the leach liquor under conditions that minimize reactions with a ...
formed. The process is particularly suitable for ores containing acid-consuming gangue, concentrates with high arsenic or halide contents and for copper-gold ores with significant sulfide mineralisation. Further optimisation work and improvement work is planned, leading to a pilot scale program. An exclusive license has been signed
Jan 01, 2017 While the dissolution rates of the copper oxide minerals are markedly slower than acid leaching, the selective dissolution of copper over acid-consuming gangue minerals shows much potential. It was shown through UVVis spectroscopy that dissolved copper is in the cupric state and forms a neutral copper-glycinate complex under alkaline conditions.
of the acid consuming minerals was a pre-requisite to the bioleaching experiments. In the other hand the leaching ... due to non-dissolution of acid consuming gangue mineral. In the entire acid neutralization step the uranium dissolution ZDV DURXQG LQDOO QHXWUDOLHG RUH ZDV NHSW LQ RYHQ ... as in control the iron oxidation rate was very slow ...