activation pyrite copper

Journal of Chemistry Volume 2016, Article ID 4627929, ... Y. Peng, B. Wang, and A. Gerson, “The effect of electrochemical potential on the activation of pyrite by copper and lead ions during grinding,” International Journal of Mineral Processing, vol. 102103, ...

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Pyrite activation ontheotherhand follows a single fast step involving copper adsorption to the surface without any exchange with iron in the pyrite lattice. Copper adsorbed onto the pyrite surface does not migrate into the bulk pyrite lattice.

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Copper cations are sorbed on the surface of pyrite and sphalerite and it activates the surface of these minerals. This effect is comparable with the activation of sphalerite and pyrite by copper sulfate.

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pyrite and pyrrhotite from other sulphide minerals. Understanding of activation and depression of sulphide minerals, such as pyrite and pyrrhotite, as well as grinding media such ... A copper wire was used to connect the electrode to the digital multimeter. This wire passed through a plastic tube and

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K Laajalehto, J Leppinen, I Kartio and T Laiho, XPS and FTIR study of the influence of electrode potential on activation of pyrite by copper or lead, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 154, 12, (193), (1999).

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Experimental results show that activation of pyrite in such cyanide solutions can be achieved more effectively with lead than with copper. Subsequently, based on these fundamental studies, significant improvement at the Lone Tree Plant was achieved by lead activation, in which case the recovery increased to expected levels.

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copperzinciron mineral selectivity is related to the unintentional activation of pyrite and sphalerite by copper ions. Cyanide addition is usually employed in industrial ... copperactivated pyrite pretreated with isobutyl xanthate at pH 7 and 9, respectively. ... The effect of sulphite on the xanthateinduced flotation of copperactivated ...

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PyriteGold Recovery in Copper Rougher Flotation Tailings Eic Aminartey Agorhom 1, William Skinner and Massimiliano Zanin 1Ian Wark Research Institute ... that activation of pyrite occurs as an ion exchange process, where Fe(II) is replaced by Cu(II) on the pyrite surface [24].

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Electrochemistry of Copper Activation of Sphalerite and Potassium Isobutyl Xanthate (KIBX) Synthesized Collectors Adsorption 58 Iranian Journal of Chemical Engineering, Vol. 10, No. 4 from the spectrum of the sample.

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Electrochemical Studies of CopperActivation of Sphalerite and Pyrite Zhuo Chen (ABSTRACT) Carbon matrix composite (CMC) electrode and surface conducting (SC) electrode have been developed to study the copperactivation and the subsequent xanthate adsorption on insulating sphalerite. Fabricating CMC electrode involves embedding sphalerite ...

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Interaction of copper(II) ions with pyrite and its influence on ethyl xanthate adsorption. Authors. S. Voigt, Institute of Physical and Theoretical Chemistry, University of Leipzig, Linnéstr. 2, D04103 Leipzig, Germany; Search for more papers by this author. R. Szargan,

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copper sulphate to activate pyrite, it is necessary to review the response of pyrite surfaces to the presence of cyanide and copper (II) ions. The Pourbaix diagram of the FeSCNH2O system in Figure shows that Fe(CN)63and Fe(CN)64are the stable …

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But because the price of copper sulfate and sodium carbonate is much high and the grade of pyrite is lower, many leadzinc tailings plants just give up its recycling, which directly wastes resources. It is suggested that using ammonium carbonate to activate the pyrite can obtain the good effect.

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pyrite on the copper activation of sphalerite. 2. Materials and Methods Minerals The highlymineralized sphalerite and pyrite samples used in this study were obtained from Yiliang Mine, Yunnan Province, China. After the manual removal of gangue minerals, such as quartz

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Thus, more copper(II) species were reduced to copper(I) species on the pyrite surface, which resulted in more pyrite activation by mild steel medium. Consequently, 30 wt.% chromium medium produced better chalcopyrite selectivity against pyrite than mild steel medium.

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Pyrite activation was studied by adding 5 × 10 −4 M CuSO 4 ·5H 2 O and conditioning the pyrite electrode at E h of −80 mV maintained by the Amperometric it Curve technique in buffer solution for 10 min since the reducing condition favors the copper activation of pyrite.

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Copper activation of pyrite depressed by NaOH and CaO Using experimental methods, Wang et al. have shown that noiron is liberated from pyrite during the adsorption of copper(Cu(II)) by pyrite …

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Saline water has been widely used in the flotation of copper sulfide minerals against pyrite where pyrite may be activated by copper ions emanating from copper sulfide minerals. The effect of saline water on copper activation on pyrite surface has not been studied before.

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Depression of pyrite in porphyry copper flotation ... the copper sulphide 2. Surface Cu activation and genuine flotation 2 grinding medium pyrite eeFe 3+ OHGalvanic interactions in complex sulphide ... activation of pyrite in the presence of O2, reducing pyrite recovery by 50%.

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mechanism of activation of pyrite by copper ions differs from that of sphalerite: copper ions are adsorbed on sulfur sites on the pyrite surface [9,10]. Activation by copper ions applies not only to metal sulfide minerals, but also to chlorites, lizardite, and quartz. In the pH range of 7–10, minerals activated by copper ions interact

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mechanism of activation of pyrite by copper ions differs from that of sphalerite: copper ions are adsorbed on sulfur sites on the pyrite surface [9,10]. Activation by copper ions applies not only to metal sulfide minerals, but also to chlorites, lizardite, and quartz. In the pH range of 7–10, minerals activated by copper ions interact

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Figures and , show Oisopropyl ethyl thiocarbamate had the lowest recovery and zinc content in the bulk concentrate. Galvanic interaction between sphalerite and chalcopyritepyrite mineral mixtures causes dissolution of copper ions from chalcopyrite and thus activation of sphalerite and pyrite by these copper ions (Ekmekci,et al.,2004).

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Pyrite Oxidation Mechanism by Oxygen in Aqueous Medium Egon Campos Dos Santos, Juliana Cecília de Mendonça Silva, and He ́lio Anderson Duarte * ... lower activation energies and are redox processes that involve oxidation of two Fe(II) sites on the surface to form predominantly ... pyrite oxidation in the presence of water leading to the ...

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Copper activation option for a pentlandite–pyrrhotite– ... pyrite and pyrrhotite—along with other minerals, while the major gangues are amphibolites, quartz, mica and feldspar, forming typically about 68 % (Table 1). Cobalt is present in solid solution in the pentlandite to about % head

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activate copper and separation of sulphides from ores (Martin et al., 1989). Nitrogen 1989 Using nitrogen increased the floatability of pyrite. 2 The polyacrylamide polymers were used to separate the copperactivated from pyrite along with isobutyl xanthate (Boulton et al., 2001). Polyacrylamide 2001 Using the polyacrylamide leads to

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This phenomenon is explained by different activation mechanisms. The pyrite activation by copper ions is considered to be an electrochemical process involving the formation of new Cu+sulfide species.

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Saline water has been widely used in the flotation of copper sulfide minerals against pyrite where pyrite may be activated by copper ions emanating from copper sulfide minerals.

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Copper ions have an unusual activation effect, which promotes the recovery of sphalerite, pyrite, and other minerals. However, the activation effect of copper ions makes mineral separation difficult. A comprehensive study of the special characteristics, applications, and control of activation by copper ions is therefore necessary.

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Electrochemical Control of PyriteActivation by Copper Abstract Copper activation of polished and in situ fractured pyrite electrodes has been studied using voltammetric techniques in near neutral and acid solutions. For these studies, the pyrite electrodes were activated for fixed time periods in CuSO 4, rinsed, and inserted in a pH ...

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The copper activation mechanism of pyrite surface was simulated by density functional theory (DFT) method. It is shown that copper (Cu) can easily adsorb on pyrite surface, which causes the flotation of pyrite.

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• Copper activation of pyrite and subtraction of collector available for chalcopyrite. For tests with constant collector addition (Figure 3), an increase in pyrite content from 0% to 80% resulted in a decrease in chalcopyrite recovery from 98% to 80% and a

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