metal ions sulphide flotation


EFFECTS OF EDTA ON SELECTIVE FLOTATION OF SULPHIDE …

Key words: flotation, sulphide minerals, activation, EDTA INTRODUCTION ... from metal ions can be prevented by the use of EDTA as a complexing agent to extract metal ions from the mineral surfaces and form complex compounds with the dissolved ions in the pulp. In this work, unwanted activation of sphalerite and pyrite ...

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CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

chalcopyrite, galena, sphalerite, pyrite. Selective flotation. Pb-Zn bulk flotation. Sulphide minerals are floated by sulphydryl collectors (thio-componds) Adsorption of Sulphydryl Collectors: Adsorption of sulphydryl collectors may occur mainly by chemisorption at metal ion sites on a surface, and by electrochemical mechanisms.

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Removal of Sulfide, Sulfate and Sulfite Ions by Electro ...

Coagulation was found to be essential for effective flotation of suspended solids. Metal ions generated in situ by electrolytic oxidation of anode were found to react with dissolved sulfide ions ...

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Full article: The Effect of Tetrathionate Ions on the ...

Past studies have also reported on the significance of thiosulfate ions on sulfide ore flotation. Thiosulfate ions have the propensity to interact with metal ions forming complexes and passivating the surface of the mineral (Eliseev and Kirbitova 1984; Kirjavainen, Schreithofer and Heiskanen 2002; Öztürk et al. 2018; Petrus et al. 2012).

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REVIEW: ADSORPTION OF IONS AND MOLECULES TO SOLID …

(1994). REVIEW: ADSORPTION OF IONS AND MOLECULES TO SOLID SURFACES IN CONNECTION WITH FLOTATION OF SULPHIDE MINERALS. Journal of Coordination Chemistry: Vol. 32, No. 4, pp. 261-342.

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The interaction of flotation reagents with metal ions in ...

The metal ions in mineral surface are coordinated by surrounding atoms, which are in a semi-constrained state (Chen and Zhu, 2021).Therefore, the coordination of flotation reagents (including water molecules) with mineral surface …

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Metal ion production and transfer between sulphide ...

Metal ions produced by minerals, alone and in pairs, was studied by solution analysis, EDTA extraction and LIMS for combinations of pyrite, pyrrhotite, galena, and sphalerite. The effect of grinding, pH, and the presence of xanthate was studied. Metal ion production with minerals in pairs was different from that for single minerals. The amount of metal ions in solution followed …

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NICKEL AND COBALT ORES: FLOTATION

heavy metal ions such as Ni2#,Cu2#,Ag2#, which were causing the inadvertent activation. By using a small amount of DETA the separation efRci-ency was greatly improved (Figure 6); however, the depressing effect is more effective when the ore is oxidized. The activation products formed on pyrrhotite may be sulRdes of Ni, Cu and Ag, which are usually

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FROTH FLOTATION : RECENT TRENDS Flotation of Sulphide …

History of Sulphide ore flotation dates back to beginning of 20th century. Sulphide ores are major sources of base metals like Copper, Lead, Zinc, Nickel, Cobalt etc. Beneficiation of these base metal sulphide minerals is predominating through froth flotation technique. This technology has acclaimed importance as a versatile process for

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Chapter 8 Flotation of Non-Sulphide Minerals

Activation of quartz by metal ions is a further example of hydroxy-complex formation. The solubility of quartz is very limited and the only cation from the mineral is silicon. Thus quartz activation for flotation by anionic collectors requires metal ions in the pH ranges in which they form hydroxy complexes.

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mineral flotation mineral

Mineral Flotation, Mineral Processing, Training, Tails ... A number of mineral flotation sulfide, soluble salt and iron ore presentations for mill operators, techncial and management personnel that cover the fundamentals of mineral flotation separations, operation, optimization and chemical use; water treatment plant operator training and optimization; thickener system …

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Enhanced sulfidation xanthate flotation of malachite using ...

flotation of malachite using ammonium ions as activator Dandan Wu, Wenhui Ma, Yingbo Mao, ... surfaces generates a metal sulfide film in favor …

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Geochemical modelling of diethylenetriamine in tailings ...

Sulphide precipitation has the advantage of lower solubility of metal sulphide compound, faster reaction rate, and better settling properties than the respective hydroxide compounds (Lewis, 2010). Table 1 compares the K sp values of metal sulphide compounds with the DETA complexes that have the highest K sp value for each metal ion (MDETA 2).

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Effect of Copper and Iron Ions on the Sulphidizing ...

The researches on flotation mechanism mainly focus on the interaction between ions and minerals in the pulp and the adsorption behavior between the metal ions and the minerals [12–14]. Wei et al. studied the influence of metal ions (such as Ca 2+, Mg 2+, Fe 2+, Fe 3+, Cu 2+, Zn 2+, and Al 3+) in the pulp on the chalcopyrite and galena ...

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Minerals | Free Full-Text | Effect of Magnesium on the ...

A review of the fundamental studies of the copper activation mechanisms for selective flotation of the sulfide minerals, sphalerite and pyrite. Adv. Colloid Interfac. 2009, 145, 97–110. [Google Scholar] Mirnezami, M.; Hashemi, M.S.; Finch, J.A. Mechanism of alkaline earth metal ion adsorption on sulphide minerals.

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Toward green flotation: Interaction of a sophorolipid ...

We offer a mechanistic interpretation of these findings. Our results provide a basis for the application of acidic glycolipids in froth flotation and have implications for their application in ion separation using hydrometallurgical routes, as well as for the chemical stability of metal sulfides in environmental systems.

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Effects of major ions in recycled water on sulfide ...

MINERAS & METAURGICA PROCESSING 137 Vol. 33 No. 3 August 2016 Effects of major ions in recycled water on sulfide minerals flotation G. …

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Introducing CTS (Copper-Tin-Sulphide) as a Solar Cell by ...

Metal sulphide solubility is usually lower than hydrogen peroxide several orders of magnitude, so if the occasion of sulphide is cheap and available, it is a good choice to input sulphide in wastewater to move the sulphide precipitation formed of metal ions in sewage.

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Mining Chemicals:SODIUM SULFIDE sodium sulphide Na2S

Sodium Sulfide (Na 2 S) is a commonly used agent in the flotation of sulfide ores. In addition to the above three main functions, sodium sulphide also has the effect of eliminating certain ions in the slurry that are harmful to flotation, because sodium sulphide can form insoluble sulfide precipitates with many metal ions.

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Metal ion production and transfer between sulphide ...

Keywords Metal ions, metal ion transfer, LIMS analysis, EDTA extraction, galvanic effects. INTRODUCTION Metal ion contamination of surfaces is frequently suspected of playing a detrimental role in selective flotation. In the case of sulphide ores, one source of metal ions is oxidation of sulphide minerals.

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The interaction of flotation reagents with metal ions in ...

The selective interaction between reagents and mineral surfaces is the core basis of mineral flotation separation. This paper creatively proposes a perspective from coordination chemistry to clarify the interaction mechanism of reagents with mineral surfaces systematically and profoundly. The metal ion in mineral surface is far different from the free ion.

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Processes | Free Full-Text | Flotation in Water and ...

Flotation constitutes a separation process that originated from mineral processing. Nowadays, wider applications have been found and compared to flotation for water and wastewater treatment. Stress in the present review paper was mainly applied to heavy metal ions recovery by flotation and the respective mechanism followed, being either ion, …

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Selective recovery of copper from ammoniacal leachates by ...

Ion flotation. Due to the low metal concentrations in these resources, the leaching will generate dilute leachates from which metal recovery is a challenge. Ion flotation is a separation technique capable of recovering metal ions from dilute aqueous leachates. ... At this temperature, pyrite was oxidised to hematite and the metal sulphide ...

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(PDF) Sorptive flotation for metal ions recovery | Kostas ...

The impact of metals speciation on biosorptive flotation does worth attention. Most metal cations hydrolyse in aqueous solution, depending on the pH value and different hydrolysed species may be present in addition to free metal ions. The latter …

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Influence of water resources and metal ions on galena ...

metal ions (Allison, 1982; Bessiere, et al., 1990; Finkelstein, 1997; Fuerstenau, 1999). These authors also discussed the various mechanisms involved during these processes on sulphide minerals. Various sulphide and gangue minerals of concern for this investigation can be activated for flotation with metal salts under certain conditions, for ...

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Kinetic studies of sulfide mineral oxidation and xanthate ...

Sulfide minerals are a major source of metals; however, certain sulfide minerals, such as pyrite and pyrrhotite, are less desirable. Froth flotation is a commonly used separation technique, which requires the use of several reagents to float and depress different sulfide minerals. Xanthate, a thiol collector, has gained immense usage in sulfide minerals flotation.

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EXTRACTING METALS FROM SULFIDE ORES

Treatment of sulfide mineral flotation concentrates can also be carried out using hydrometallurgy, in which process the metal sulfide is dissolved (leached) into an aqueous solution. Some processes involve both smelting and leaching steps. This is the case, for example, in zinc sulfide processing.

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Dissolved-Air Flotation of Metal Ions

Downloaded By: [HEAL- Link Consortium] At: 09:40 18 June 2007 DISSOLVED-AIR FLOTATION OF METAL IONS 1747 stoichiometric amount required. This seems to contradict previous results, where a 30% excess of sodium sulfide was found to be adequate (If), but a possible explanation can be traced to froth flotation (14) where sodium sulfide constitutes a depressing agent for …

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Effects of major ions in recycled water on sulfide ...

The use of recycled water in flotation has significant effects on flotation and selectivity because the recycled water contains many dissolved compounds and ions that alter the chemistry of the system. In this study, the effects of calcium, magnesium and sulfate, which are abundant components in recycled water, were investigated on galena, sphalerite and …

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[Ultraviolet-visible spectrometry analysis of insoluble ...

A ultraviolet-visible spectrometry method of determining insoluble xanthate heavy metal complexes in flotation wastewater was the first time to be put forward. In this work, the changes of ultraviolet-visible spectra of xanthate solution after the addition of various heavy metal ions were investigat …

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Sulphide Flotation - an overview | ScienceDirect Topics

Sulphide Flotation. In practice, sulfide flotation plants operate at pulp potentials that are in the range of +50 to +200mV versus SHE (Grano, 2004) and the value depends on the pulp pH, type and quantity of sulfide minerals, the type and quantity of grinding media (Rao et al., 1976), and the amount of air–pulp contact in and after the grinding circuit (Teague et al., 1999b).

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Typical roles of metal ions in mineral flotation: A review ...

Key words: metal ions; flotation; oxide mineral; silicate mineral; sulfide mineral 1 Introduction Flotation is a versatile method extensively used in mineral processing fields to separate valuable minerals from gangue minerals selectively, which is based on the wettability differences among mineral surfaces [1,2].

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Physical Adsorption Mechanism in Terms of Sulphide …

12%Activation of sulphides by heavy metal ions is discussed. A brief analysis of modern ideas on mechanism of activation of sphalerite, pyrite and galena by copper sulfate and lead nitrate is given. It is shown that the current technology insufficiently conforms to the experimental and practical data on activation of minerals. A new mechanism …

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