overdosing xanthate in the flotation of copper sulphides

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 overdosing xanthate in the flotation of copper sulphides

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overdosing xanthate in the flotation of copper sulphides

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overdosing xanthate in the flotation of copper sulphides

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overdosing xanthate in the flotation of copper sulphides

(PDF) Flotation of a copper sulphide ore from Okiep using

Hangone et al. (2005), in a study of the effects of thiol collectors: xanthates, dithiophosphates, dithiocarbamates and mixtures of these collectors in the flotation of a copper sulphide ore

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THE EFFECT OF SULPHITE ON THE XANTHATE-INDUCED

THE XANTHATE-INDUCED FLOTATION OF COPPER-ACTIVATED PYRITE Received March 15, 2002; reviewed and accepted May 15, 2002 The effect of sulphite ions on the xanthate-induced flotation of copper-activated pyrite has been studied. Various techniques have been used to identify the plausible mechanisms of interaction of sulphite with both collector and

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CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

-forms on the galena surface in preference to lead xanthate. 2. Sulphide as depressant (S 2-) Lead sulphide is a very insoluble compond so that additions of sodium sulphide (Na 2 S) result in the formation of lead sulphide rather than lead xanthate. 2PbX 2 (s) + S- PbS(s) + 2X The depression effect of S2-depends on pH of the solution. Of all

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The Application of Xanthate in Froth Flotation Process

11/04/2019 Xanthate, as the flotation collector with strong collection effect, is mainly used to enhance the hydrophobicity of the mineral surface to meet the requirements of flotation.Xanthate is commonly used in the flotation process of sulfide minerals. Xanthate is a combination of alcohol, sodium hydroxide and carbon dioxide, which is an anionic collector. . It is light yellow,

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(PDF) A Review of the Flotation of Copper Minerals

Sulphide ores are the major sources of base metals like Copper, Lead, Zinc, Nickel and Cobalt. Beneficiation of. these base metal sulphide minerals is predominantl y

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Flotation of Nickel-Copper Sulphide Ore: Optimisation of

isopropyl xanthate) and depressant (Betamin 300) were used for the investigations and 10% solutions of both analytical grade sulphuric acid and sodium hydroxide were used as pH modifiers. For each test freshly prepared reagent solutions were used. Distilled water was used in all flotation experiments. Fig.1. X-ray diffraction pattern of the nickel-copper sulphide ore

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THE EFFECT OF COPPER SULPHATE ON FROTH STABILITY

copper xanthate species which promote bubble coalescence. In the absence of xanthate, the copper hydroxide coatings could have reduced the amount of froth stabilising particles reporting to the froth phase which destabilises the froth. The findings of this study showed that both the pulp and the froth zones were affected by copper sulphate

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Study of Flotation Parameters for Copper Recovery from

to flotation using xanthate as a collector. Tetrahedrite floats well with aerophine and mercaptan type of collectors at a pH value between 8 and 10 [11]. Selective separation of sulphide minerals can be achieved using a variety of collectors and modifiers to adjust surface properties [10],[12]-[14]. In practice, when treating complex sulphide ores, the combination of depressants is

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The effect of grinding conditions on the flotation of a

01/11/2003 The sulphide minerals ground under these conditions do not present self-induced floatability and their flotation response in the presence of xanthate is usually poor (Heyes and Trahar, 1979). When two sulphides presenting large differences between their rest potentials are in contact or are ground in a porcelain mill, the sulphide with lower rest potential will act as

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Use of xanthogen formates as collectors in the flotation

01/02/2000 1.. IntroductionXanthogen formates are made by reacting a xanthate with an alkyl chloroformate: (1) R and R′ are typically short chain alkyl groups usually varying from methyl to amyl, and iso and secondary alkyl groupings, as well as aryl and aralkyl groupings, may be used. The use of xanthogen formate as a collector to float base metal sulfides, especially those of

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CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

-forms on the galena surface in preference to lead xanthate. 2. Sulphide as depressant (S 2-) Lead sulphide is a very insoluble compond so that additions of sodium sulphide (Na 2 S) result in the formation of lead sulphide rather than lead xanthate. 2PbX 2 (s) + S- PbS(s) + 2X The depression effect of S2-depends on pH of the solution. Of all

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Flotation of mixed oxide sulphide copper-cobalt minerals

Flotation of mixed oxide sulphide copper-cobalt minerals using xanthate, dithiophosphate, thiocarbamate and blended collectors L.T. Tijsseling, Q. Dehaine, G.K. Rollinson, H.J. Glass⁎ UniversityofExeter,CamborneSchoolofMines,Penryn,CornwallTR109FE,UnitedKingdom ARTICLE INFO Keywords: Mixed oxide sulphide ore Flotation Copper Cobalt QEMSCAN ABSTRACT

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Enhanced sulfidation xanthate flotation of malachite using

Sulfidation xanthate flotation is the most widely used method for dealing with copper oxide ore 9, 12, 13. Sodium Sodium sulfide can promote the flotability of oxide copper ore 14,

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(PDF) A Review of the Flotation of Copper Minerals

Sulphide ores are the major sources of base metals like Copper, Lead, Zinc, Nickel and Cobalt. Beneficiation of. these base metal sulphide minerals is predominantl y

get price

Study of Flotation Parameters for Copper Recovery from

to flotation using xanthate as a collector. Tetrahedrite floats well with aerophine and mercaptan type of collectors at a pH value between 8 and 10 [11]. Selective separation of sulphide minerals can be achieved using a variety of collectors and modifiers to adjust surface properties [10],[12]-[14]. In practice, when treating complex sulphide ores, the combination of depressants is

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Mining Industry Copper Sulfide Ore and Flotation Process

09/07/2019 The most commonly used collector for flotation chalcopyrite is xanthate, chalcopyrite is easy emerged in a wide pH range (3 to 12). Chalcopyrite is susceptible to inhibition by cyanide and oxidants in the alkaline pulp. Excess lime and sodium sulfide and ammonium sulfide inhibit chalcopyrite in alkaline slurries. (2) Chalcocite (Cu2S) The chalcocite is one of

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FLOTATION OF COPPER AND NICKEL SULFIDES FROM TALCOSE

A method for the flotation of nickel and copper sulphide minerals from talcose bearing ores using an alkaline circuit in which at least one of the alkaline reagents is soda ash or ammonium hydroxide and following conditioning of the pulp with a collecting agent of the xanthate family to activate the nickel and copper sulphide materials, the pulp is conditioned with a flocculating

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ANALYSIS OF FUNCTION OF COPPER SULFIDE NANOPARTICLES

17/06/2021 Abstract The authors compare the effect exerted by copper ions and sulphide copper nanoparticles on flotation of Gorevka deposit sphalerite using potassium n-butyl xanthate and in reagent-less regime. Covelline-like colloid particles 4–8 nm in size, obtained in interaction of copper (II) and sulfide ions in aqueous solutions, are characterized using the

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A Review of the Flotation of Copper Minerals

02/07/2017 A Review of the Flotation of Copper Minerals Tinashe O. Ndoro Department of Metallurgical Engineering, University of Zimbabwe, Box MP167 "The Solution Electrochemistry of sulfide-xanthate-cyanide systems in sulfide mineral flotation.," vol. 9, no. 5, 1996. V. Glembotskii, V. Klassen and I. Plaksin, Flotation, New York: Primary Sources, 1963. E. M.

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Review, Evolution and Optimization of the Kansanshi Mixed

The traditional method applied for the flotation of copper oxide or mixed ores is sulphidisation, which was first developed with industrial success on Pb–Zn oxide ores in Australia (Crozier, 1991). The method involves multistage addition of sodium sulphide (Na 2 S), sodium hydrogen sulphide (NaHS), or ammonium sulphide (NH 4) 2 S as a sulphidising agent, together with

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THE EFFECT OF SULPHITE ON THE XANTHATE-INDUCED FLOTATION

THE XANTHATE-INDUCED FLOTATION OF COPPER-ACTIVATED PYRITE Received March 15, 2002; reviewed and accepted May 15, 2002 The effect of sulphite ions on the xanthate-induced flotation of copper-activated pyrite has been studied. Various techniques have been used to identify the plausible mechanisms of interaction of sulphite with both collector and

get price

Flotation of mixed oxide sulphide copper-cobalt minerals

Flotation of mixed oxide sulphide copper-cobalt minerals using xanthate, dithiophosphate, thiocarbamate and blended collectors L.T. Tijsseling, Q. Dehaine, G.K. Rollinson, H.J. Glass⁎ UniversityofExeter,CamborneSchoolofMines,Penryn,CornwallTR109FE,UnitedKingdom ARTICLE INFO Keywords: Mixed oxide sulphide ore Flotation Copper Cobalt QEMSCAN ABSTRACT

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Enhanced sulfidation xanthate flotation of malachite using

Sulfidation xanthate flotation is the most widely used method for dealing with copper oxide ore 9, 12, 13. Sodium Sodium sulfide can promote the flotability of oxide copper ore 14,

get price

Study of Flotation Parameters for Copper Recovery from

to flotation using xanthate as a collector. Tetrahedrite floats well with aerophine and mercaptan type of collectors at a pH value between 8 and 10 [11]. Selective separation of sulphide minerals can be achieved using a variety of collectors and modifiers to adjust surface properties [10],[12]-[14]. In practice, when treating complex sulphide ores, the combination of depressants is

get price

A Review of the Flotation of Copper Minerals

02/07/2017 A Review of the Flotation of Copper Minerals Tinashe O. Ndoro Department of Metallurgical Engineering, University of Zimbabwe, Box MP167 "The Solution Electrochemistry of sulfide-xanthate-cyanide systems in sulfide mineral flotation.," vol. 9, no. 5, 1996. V. Glembotskii, V. Klassen and I. Plaksin, Flotation, New York: Primary Sources, 1963. E. M.

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AN INVESTIGATION OF COPPER RECOVERY FROM A SULPHIDE

improvement of sulphide-oxide copper ores processing through the use of mixed collector systems has surged. The flotation of a natural porphyry copper ore with bornite and malachite was investigated via fundamental work with pure minerals and a bench-scale testing regime. The processing of the test ore was problematic due to a mineral assemblage that caused prevalent

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Review, Evolution and Optimization of the Kansanshi Mixed

The traditional method applied for the flotation of copper oxide or mixed ores is sulphidisation, which was first developed with industrial success on Pb–Zn oxide ores in Australia (Crozier, 1991). The method involves multistage addition of sodium sulphide (Na 2 S), sodium hydrogen sulphide (NaHS), or ammonium sulphide (NH 4) 2 S as a sulphidising agent, together with

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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. This facilitates the formation of iron hydroxide on the pyrite surface.

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Flotation of Copper oxide ore Fodamon Machinery

Addition of reagents is of special significance to the flotation of copper oxide ores, especially sodium sulfide, which is not only an activator of copper oxide ores, but also an inhibitor of copper sulfide ores. Therefore, it is not appropriate to add enough reagents at one time, usually in batches and stages. Therefore, the first operation (roughing) in the flotation process is to

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Flotation of Sulfide Minerals

11/06/2018 Rest potentials of various sulfide minerals have been established under flotation conditions, as Table 1 shows for a solution containing 6.25 × 10–4 mol/L ethyl xanthate at pH 7. Galena Flotation The flotation response of galena with 1 × 10 5 mol/L ethyl xanthate in the presence of air is presented in Figure 1.

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