Since plant practice is to apply xanthate as a collector in neutral to slightly alkaline condition for the flotation of galena and chalcopyrite, the solution effects cannot be ignored. ... Flotation of sphalerite and pyrite in the presence of sodium sulfite. Int. J. Miner. Process., 63 (2001), pp. 17-28, 10.1016/S0301-7516(00)00067-3.Web
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Moreover, mixed-mineral flotation recovery of galena and sphalerite were 91% and 3%, respectively, at the condition of 10 mg/L pectin and pH 8, further confirmed that pectin could be used to achieve efficient separation between galena and sphalerite. (2) Electrokinetic and adsorption experiments results. CRediT authorship contribution …Web
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The flotation results showed that collector with more (DPTZ) offered better selectivity for the flotation separation of galena from a galena/sphalerite mixed …Web
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Introduction. Galena is a common and typical lead-containing mineral on the earth (Chen et al., 2011, Huang et al., 2019b, Wang et al., 2019). It is usually associated with other sulfide minerals in the ore deposits, such as chalcopyrite (CuFeS 2), sphalerite (ZnS) and marmatite ((Fe,Zn)S) (Hayes and Ralston, 1988).Flotation is the commonly used …Web
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Some of the metals that can do the job are copper and lead. At a pH between 8-9 lead can activate sphalerite to cause it flotation. So the reason is during the flotation of the two there may be lead re dissolution from galena which may activate sphalerite to cause it flotation. It may best if you are doing bulk flotation of the two.Web
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The XPS analysis results for galena, sphalerite and pyrite in a CDR system show that in the strong alkaline solution, some of the collectors, that have been already …Web
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In froth flotation the molecular interaction between reagents and mineral surfaces take place at the solid liquid interface. In this paper, the effect of water molecule on the three typical thiol collectors (xanthate, dithiocarbomate and dithiophosphate) interactions at the galena (PbS) and sphalerite (ZnS) surfaces has been studied adopting density …Web
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The motive of this work was to explore PBTCA as a novel sphalerite depressant in the selective flotation separation of galena from sphalerite. The flotation behaviors were examined by flotation tests and depression mechanism was unveiled by zeta potential measurement, Fourier Transform Infrared spectroscopy (FTIR) and X-ray …Web
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This paper reports the results of flotation tests conducted with a copper-lead-zinc sulphide ore. The major sulphide minerals in the ore are chalcopyrite, galena, sphalerite, marmatite and pyrite ...Web
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Microbially Induced Mineral Beneficiation. K.A. Natarajan, in Biotechnology of Metals, 2018 Sphalerite–Galena Separation. Differential surface chemical behavior of A. ferrooxidans towards galena and sphalerite can be made use of in the separation of galena from sphalerite through selective flotation after bacterial conditioning. Flotation recovery of …Web
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The flotation results demonstrate that Zn 2+ and SO 3 2− provide a synergistic depression effect on sphalerite and the aerofloat collectors exhibit more selectivity towards galena.Web
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To enhance the selective separation of galena and sphalerite from their mixture minerals, 2-hydroxyethyl dibutyldithiocarbamate (HEBTC) surfactant was synthesized and its first applications on the flotation of galena and sphalerite were studied. The interfacial adsorption mechanisms of HEBTC on galena and sphalerite surfaces …Web
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The effect of HA on the flotation of galena and sphalerite were evaluated by micro-flotation tests. The depression mechanisms were investigated by adsorption capacity, Zeta potential and X-ray photoelectron spectroscopy (XPS) analysis. The results of micro-flotation tests proved that HA was an efficient and selective sphalerite depressant ...Web
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Flotation is the most important method for recovering sphalerite, and it has attracted significant research attention worldwide. In this study to clarify the hotspots for phased research frontiers and research progress of sphalerite flotation technology in the last 20 years, 720 pieces of relevant academic literature were selected by using …Web
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At the given reagent and operating conditions, floc flotation increases the floatability of the galena and sphalerite fines over 30% ~ad 50% in the range of pH 5 to 8, respectively, in comparison to the corresponding conventional flotation. Clearly, floc flotation is an effective means of recovering galena and sphalerite fines.Web
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Monyake et al. [108] studied the depression ability of chitosan-grafted-polyacrylamide (Chi-g-PAM) in separating a complex sulfide ore from Mississippi Valley comprising chalcopyrite, galena, sphalerite, and pyrite (Fig. 13). Flotation outcomes revealed that Chi-g-PAM was preferentially adsorbed onto pyrite particles among all …Web
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In this work, HPAA (2-Hydroxyphosphonoacetic Acid) was explored as a novel sphalerite depressant for the selective flotation of sphalerite and galena. The depression performances and mechanisms were investigated through micro-flotation tests and various characterization techniques. Micro-flotation tests showed that HPAA selectively inhibited ...Web
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In the past investigations, the separation of galena and sphalerite in flotation was generally performed via the preferential flotation of galena as well as the suppression of sphalerite, since galena exhibited superior natural floatability than sphalerite [10]. The depressants employed for sphalerite are mainly some inorganic salts, including ...Web
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The sphalerite was then separated from the galena flotation tailings, activating it with 350 g/t of copper sulphate and using 20 g/t of potassium butyl xanthate as a collector. The Zn concentrate resulting after three re-cleaning stages had a content of 53.77% Zn and a recovery of 88.79%.Web
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1. Introduction. Galena (PbS) and sphalerite (ZnS) are abundant in the earth and usually exist together in the same deposit. 1−3 Most lead–zinc ores are processed by differential flotation, in which galena is recovered first followed by sphalerite. 4,5 The addition/presence of lead ions (Pb 2+) in ore pulp can directly promote the sphalerite …Web
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Flotation is the most effective method to separate galena and sphalerite ( Bandini et al., 2001). It uses the difference in the surface hydrophobicity of minerals to …Web
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The maximum flotation recoveries were obtained with the addition of MIBC (methyl isobutyl carbinol) as a frother; the size of the air bubbles deceased with …Web
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This work studies the depression of sphalerite and pyrite with a NaCN:ZnSO4 mixture in the selective separation of Pb-Zn by flotation when the blend is enriched with Ag. Given in this paper are an explanation of depression mechanism and the method for optimizing the Pb-Ag recovery. This was done by analyzing the …Web
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Sulfide minerals are naturally more hydrophobic than most of the mineral groups and respond well to flotation. Even though, most sulfide ores contain minerals (e.g., chalcopyrite, pyrite, galena, and sphalerite) presenting similar surface physicochemical properties, flotation is practically the most effective method in their beneficiation [13, 14].Web
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In the case of galena flotation, ... In sphalerite flotation [Citation 89], it has been demonstrated that an increase in pH and temperature creates favourable conditions for the stability of the zinc hydroxide complex on the mineral surface. In the Somincor plant (Portugal), significant (25%) seasonal fluctuations in zinc recovery were ...Web
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Furthermore, flotation tests showed a strong depression effect of galena after interaction with P. polymyxa cells and, consequently a high recovery of sphalerite in the presence of a suitable collector (Santhiya et al. 2001). It is worth mentioning that despite its efficiency, the large-scale application of such bioprocess could be ...Web
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Galena (PbS) is an important and abundant source of lead (Pb) metal. It often coexists with other sulphide minerals such as sphalerite (ZnS). Flotation has been extensively used to separate galena ...Web
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The flotation tests and XPS analyses on galena, sphalerite and pyrite have been carried out in a collecting-depressing-reactivating system (hereafter referred as the CDR system). In this system, sulfide minerals were first collected and activated by the collector, and then depressed strongly by Ca(OH)2 in the strong alkaline solution, and …Web
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Conventional flotation extracts lead and copper minerals of 30–74 μ in size into the rough concentrate (Fig. 10A), chamber product of scavenger flotation contains minerals of zinc and iron (Fig. 10B). With a chamber product of scavenger flotation is lost galena, which is in the form of phenocrysts in sphalerite (Fig. 10C).Web
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In this study, selective adsorption mechanism of zinc ions on the surfaces of galena and sphalerite in the flotation separation of Pb-Zn was comprehensively …Web
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The flotation process was first employed to separate sulfide mineral resources 100 years ago. A typical example is floating successively galena (PbS) / sphalerite (ZnS) using ethyl xanthate (EX) as collector and copper sulfate as activator while depressing pyrite (FeS 2) using lime as depressant [6], [7]. Large quantities of lime can …Web
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1. Introduction. Galena (PbS) and sphalerite (ZnS) are the main sources of lead and zinc and usually associated in sulfide deposits. Because of the similar surface properties of these two minerals, their flotation separation is a persistent topic of interest in mineral processing [1].Xanthate is the most commonly used collector for sulfide mineral …Web
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Sphalerite flotation is conducted under Cu 2+ activation system, whereas the selective separation of pyrrhotite is difficult due to the inevitable activation effect of Cu 2+, which requires a large amount of lime to depress pyrrhotite flotation.In this study, the conventional collector butyl xanthate and a novel collector ML8 were compared to the …Web
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The flotation products in all size classes mainly presented liberated galena, galena as middlings with Fe sulphides and sphalerite, and complex associations. The associations with other sulphides were negligible, whereas minor contents of galena/NSG middlings were observed along the process.Web
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Flotation is the most important method for recovering sphalerite, and it has attracted significant research attention worldwide. In this study to clarify the hotspots for phased research frontiers and research progress of sphalerite flotation technology in the last 20 years, 720 pieces of relevant academic literature were selected by using …Web
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The high consumption of depressants in the flotation separation of sulfide lead-zinc ores would cause serious environmental problems, and conventional dithiocarbamate collectors suffered from the drawbacks of low flotation activity and poor selectivity.Hence, it's urgent to develop efficient collectors for the separation of galena …Web
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Flotation has been extensively used to separate galena and sphalerite. Herein, a reagent scheme comprising aerofloat collectors and Zn 2+ and SO 3 2− …Web
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