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Synergistic interactions between reagents in sulphide

flotation of coal and graphite; cationic which are typically amine salts and used in the flotation of silicates and sulphides in alkaline conditions; and anionic which are used to float basic minerals such as metal oxides and sulphides. Fatty acids are used for the flotation of non-sulphide minerals such as apatite, calcite, feldspar and hematite.

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 sulfide ores.

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Flotation Behavior of Complex Sulfide Ores in the Presence

Jun 12, 2017· In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS 2 ) from sphalerite (ZnS) and pyrite (FeS 2 ) using sodium isopropyl xanthate as a collector and 4-methyl-2-pentanol (MIBC) as a frother. Flotation tests were carried out in a D12-Denver flotation laboratory cell in the presence and

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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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New influence factor inducing difficulty in selective

Jan 29, 2015· Selective flotation separation of Cu-Zn mixed sulfides has been proven to be difficult. Thus far, researchers have found no satisfactory way to separate Cu-Zn mixed sulfides by selective flotation, mainly because of the complex surface and interface interaction mechanisms in the flotation solution. Undesired activation occurs between copper ions and the sphalerite surfaces. In addition to

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The chemistry of flotation activation and depression of

Good flotation of pyrite and other iron-containing sulphides occurs only when a monolayer of xanthate ion and/or dixanthogen is co-adsorbed on the ferric (di)hydroxo xanthate sites. Cyclic voltammetric investigations show that the initial oxidation of pyrite occurs simultaneously with the oxidation of hydroxyl ions.

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Constants of Solubility Products of Metal Sulfides

The most common method of removing of the metal ions from The solubilities of the metal sulphide precipitation physical separation, bioprecipitation, ion-exchange, flotation

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sodium sulfide usage in the flotation for ore dressing

Aug 15, 2013· Two kinds of flotation gold recovery methods are slightly greater than 934 but less the conclusion sulfide dissolved in water dissociation of HS-and S2-as most metal sulfide solubility product is very small so in Metallurgy vulcanization Sodium may be used as a precipitant solution of some impurity metal ions in particular the removal of heavy

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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. Metal sulfides thus formed as colloidal suspension were coagulated and floated simultaneously by hydrogen bubbles generated from cathode.

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Flotation of Sulfide Minerals

Electrochemical studies of sulfide ion oxidation on sulfide minerals have shown that polysulfide ion is the product on pyrite and galena at low potentials, whereas elemental sulfur is deposited at higher potentials. Metal ions are used to activate sulfide minerals that do .

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Fluid Inclusion Effect in Flotation of Sulfide Minerals

Finally, the book considers the absorption mechanism and the interaction of some typical metal ions from fluid inclusions on the surface of sulfide minerals. Please Note: This is an On Demand product, delivery may take up to 11 working days after payment has been received.

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(PDF) Sulfide Mineral Flotation

Sulfide Mineral Flotation Maurice C. Fuerstenau, Subhash Chander, and Ronald Woods INTRODUCTION Froth flotation was developed at the Broken Hill mine, Australia, a century ago with the flo- tation of the common sulfide mineral, sphalerite. With this development, billions of tons of worthless rock containing a variety of valuable metals became ore.

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Effect of Copper and Iron Ions on the Sulphidizing

Mar 11, 2018· 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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Flotation Behavior of Complex Sulfide Ores in the Presence

Jun 12, 2017· In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS 2 ) from sphalerite (ZnS) and pyrite (FeS 2 ) using sodium isopropyl xanthate as a collector and 4-methyl-2-pentanol (MIBC) as a frother. Flotation tests were carried out in a D12-Denver flotation laboratory cell in the presence and

Sulphate Removal from Flotation Process Water Using Ion

Particularly in flotation of sulphide minerals, oxidation and dissolution of ore may change the pulp chemistry significantly due to the dissolved metal and sulphide ions. Bıçak et al. [ 3 ] and Öztürk et al. [ 4 ] reported that these ions can be found in the .

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Effects of Metal Ions on the Flotation of Apatite

Currently, more than 60% of the world's marketable phosphate is upgraded by the flotation process [].Fatty acids are commonly used as anionic collectors in phosphate flotation but their use is sensitive to the metal ions [5,11].Santos et al. [] reported that calcium and magnesium ions contributed significantly to the decline of apatite recovery and P 2 O 5 grade.

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Effects of major ions in recycled water on sulfide

Key words: Recycling water, Sulfide flotation, Major ions Minerals & Metallurgical Processing, 2016, Vol. 33, No. 3, pp. 137-143. The metal content of the recycled water can

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Constants of Solubility Products of Metal Hydroxides

Heavy metal ions accumulate in An increase in the gas velocity results in an increase in the ion and precipitate flotation rates. The solubilities of the metal sulphide precipitation are

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Effect of Ferric Ions on Sulfidization Flotation of

These metal ions can enhance or inhibit the adsorption of collectors on mineral surfaces, thus influencing the flotation of the target minerals. In the flotation of base metal sulfide minerals, ferric ions (Fe 3+) are common unavoidable ions, mainly originating from the surface oxidation and dissolution of iron sulfide minerals, electrochemical

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Precipitation of Heavy Metal Ions (Cu, Fe, Zn, and Pb

May 01, 2021· The effluent water coming from the flotation units (FE) used in this research contained dissolved metal ions. Several studies report concentrations of metal ions well above those found in the water used (Anawar 2015; Kefeni et al. 2015; Masindi and Gitari 2016; Nejeschlebová et al. 2015; Shengo and Mutiti 2016).From the many metals found in these effluents, this research took as .

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Effect of copper ions on the flotation separation of

Jan 01, 2018· Flotation recovery of chalcopyrite (a) and molybdenite (b) as a function of the concentration of copper ions and sulfide ions at pH 8. The separation performance of chalcopyrite and molybdenite using Na 2 S as a depressant was investigated at different Cu 2+ concentrations.

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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Constants of Solubility Products of Metal Hydroxides

Heavy metal ions accumulate in An increase in the gas velocity results in an increase in the ion and precipitate flotation rates. The solubilities of the metal sulphide precipitation are

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. Metal sulfides thus formed as colloidal suspension were coagulated and floated simultaneously by hydrogen bubbles generated from cathode.

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v115n12a14 The influence of water quality on the flotation

flotation performance of complex sulphide ores: case study at Hajar Mine, Morocco The adsorption of calcium and other metal ions in during flotation leads to the reduction of negative surface charges and consequently inhibits the adsorption of xanthate on the mineral surfaces (Ikumapayi et al., 2012).

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Characterization of sulfide film on smithsonite surface

Jun 01, 2019· Some of the literature has discussed the selection of collectors and influence of metal ions in sulfidation-flotation of smithsonite [16,17]. Although some studies have reported on the sulfidation-flotation of smithsonite, the effect of sulfide ions on the sulfide film thickness remains unknown when the oxidized zinc ores start floating and

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Preliminary Study On The Surface Morphology And Crystal

Preliminary Study On The Surface Morphology And Crystal Structure Of The Sulfide Film In The Flotation Of White Lead Sulfide Lead is an important non-ferrous metal and plays an sulfurizing reagent.When it exceeds 75 mg/L,the recovery rate begins to decrease again.At the same time,excess sulfur ions affect the flotation of cerussite.The

[PDF] Fluid Inclusion Effect In Flotation Of Sulfide

Download or Read online Fluid Inclusion Effect In Flotation Of Sulfide Minerals full HQ books. Available in PDF, ePub and Kindle. We cannot guarantee that Fluid Inclusion Effect In Flotation Of Sulfide Minerals book is available. Finally, the book considers the absorption mechanism and the interaction of some typical metal ions from fluid

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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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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. Bulut and Ü. Yenial* Professor and research assistant

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Danafloat

The established lead-zinc ore flotation processing scheme is to add zinc sulphate (ZnSO4) to the grind to control metal ion activation (sphalerite depression). Often metabisulphide or other sulphidation chemicals are added with the zinc sulphate for iron sulphide mineral depression.

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Floatation

Jan 30, 2015· It is added to the slurry prior to the flotation. It precipitates heavy metal ions from the solution thereby acting as Deactivators. But they dissociate to a greater extent into OH- and Hydrogen ions, which further modify the zeta potential and hence, the floatability of the mineral. 26 27.

(PDF) Sulfide Mineral Flotation

Sulfide Mineral Flotation Maurice C. Fuerstenau, Subhash Chander, and Ronald Woods INTRODUCTION Froth flotation was developed at the Broken Hill mine, Australia, a century ago with the flo- tation of the common sulfide mineral, sphalerite. With this development, billions of tons of worthless rock containing a variety of valuable metals became ore.

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REVISITING SULPHIDE MINERAL FLOTATION: A FEW .

There are still persistent problems in sulphide flotation of metal sulphides selectivity against pyrite and among sulphide minerals, inadvertent activation of silicate gangue by metal ions, hetero-coagulation between sulphide and gangue minerals and recovery of fine particles.

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Effect of Water Composition on Flotation of Lead and Zinc

ore, whilst ions associated with gangue minerals were released into the flotation pulp. This paper includes a research for the effect of different water compositions on lead and zinc sulphide

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WO2015095054A3

A method [100] of leaching a metal sulfide ore is disclosed. The method [100] may comprise the steps of: providing slurry [3] having metal sulfide ore particles therein; subjecting the slurry [3] to a flotation step [2] at a pH level above nine to obtain a first concentrate [15]; subjecting the first concentrate [15] to an acidic leach solution [27]; subjecting the first concentrate [15] to a

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Understanding the effect of sulphate in mining-process

and flotation. Inorganic species, such as metal ions but also carbonate and sulphate ions, may have a positive or negative effect on mineral flotation. As sulphate ions are always found in high concentrations in process waters, their effects on the flotation of copper, molybdenum and zinc sulphides were investigated in single minerals and

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Effect of copper ions on the flotation separation of

Jan 01, 2018· Flotation recovery of chalcopyrite (a) and molybdenite (b) as a function of the concentration of copper ions and sulfide ions at pH 8. The separation performance of chalcopyrite and molybdenite using Na 2 S as a depressant was investigated at different Cu 2+ concentrations.

Sulphide Flotation

The Batu Hijau Concentrator uses sea water for processing a gold-rich phorphyry copper ore (chalcopyrite-bornite) (Castro, 2012), while CBI processes a complex Cu–Zn sulphide ore using dissolved metal ions and sulphide ions, mainly in the form of .

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Sulphide Flotation

The Batu Hijau Concentrator uses sea water for processing a gold-rich phorphyry copper ore (chalcopyrite-bornite) (Castro, 2012), while CBI processes a complex Cu–Zn sulphide ore using dissolved metal ions and sulphide ions, mainly in the form of .

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The interaction of flotation reagents with metal ions in

Sep 01, 2021· 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 ions is different from traditional coordination.

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Typical roles of metal ions in mineral flotation: A review

Jul 01, 2021· 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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Overdose NaHS Depression

Sulphidiser, predominantly sulphide ions at the pH used (circa 12), is routinely used to separate chalcopyrite frommolybdenite; it is quite difficult to depress most base metal sulphides once they have contacted collector and chalcopyrite is probably the hardest. Fortunately high quantities of sulphidiser at a high pHs works quite well.

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