galena flotation depression

The Depression of Sphalerite during Carbon Preflotation

oxidation was only significant for galena and occurred mostly during preflotation, but the use of cyanide adequately counters any effect on sphalerite recovery. The investigation on the variables that affect the preflotation and lead flotation

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CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

Lecture 5 Flotation 1 CHAPTER 7– FLOTATION OF SULPHIDE MINERALS Contents: Xanthate adsorption. Oxidation reactions. Activation & depression. Flotation of chalcopyrite, galena, sphalerite, pyrite. Selective flotation. PbZn bulk flotation. Sulphide minerals are floated by sulphydryl collectors (thiocomponds) Adsorption of Sulphydryl Collectors:

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Oxidation/Reduction Effects in Depression of Sulfide

A review of the published literature on the mechanism of depression of sulfide minerals shows that a unified theory is not yet available. Various mechanisms that have been postulated include

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CopperLeadZinc ores Danafloat

This flotation step is conducted at alkaline pH. In the case where galena is floated and the copper minerals are depressed, copper depression can be achieved by using sodium sulphide, hydrosulfite, lime, cyanide, zinccyanide and/or ferricyanide complexes. Selection of flotation reagents and frothers is an important, even critical, consideration.

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SELECTIVE FLOTATION OF GALENA AND SPHALERITE AT

Batch flotation tests have shown that the use of cyanide alone is not efficient for the depression of sphalerite due to the mineralogical texture of the Rosh Pinah ore. A large quantity of galena locked and/or attached to sphalerite was observed in the lead concentrate. Their prevalence increased with increasing particle size. The use of both

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The synergetic depression effect of KMnO4 and CMC on the

The mechanism of carboxymethyl cellulose (CMC) on the galena surface and the enhancement of KMnO 4 on the depression of CMC to galena were investigated by flotation test, surface adsorption experiments, scanning electron microscopyenergy dispersive spectrometry (SEMEDS), and Xray photoelectron spectroscopy (XPS). Flotation test results indied that the addition of KMnO 4 under

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Pyrite Depression By Reduction Of Solution Oxidation Potential

PYRITE DEPRESSION BY REDUCTION OF SOLUTION OXIDATION POTENTIAL Department of Mineral Engineering University of Utah Salt Lake City, Utah 84112 for ENVIRONMENTAL PROTECTION AGENCY WATER QUALITY OFFICE Grant Number 12010 DIM December, 1970

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Carboxymethyl Chitosan as a Selective Depressant in

and galena, but it was not the reason for NCMC''s selective depression of chalcopyrite. Mineral surface cleaning tests explained the good flotation result in the absence of any chelating reagents, such as EDTA, since NCMC also possesses the similar function of

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THE USE OF SODIUM SULPHITE TO IMPROVE THE

Fig.4 Ions and hydroxides action on galena flotation (with and without sodium sulphite). Effect of Ca z* and Ba z÷ on the Ore To confirm the role of Ca z÷ and Ba z÷ ions in the depression of galena by NaaSO 3, a series of flotations was performed on the ore.

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Chemistry Of Pyrite Flotation And Depression 2019

Mar 01, 2018 · Flotation of any given mineral is intimately bound up with the degree of dispersion or flocculation of that mineral in the pulp and it may be aaid(l4) that flotation is. chemistry of pyrite depression in flotation. Our chemistry of pyrite depression in flotation Keep up with the latest news, tips and features right here! Laliberty, Dennis M.,

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Influence of water resources and metal ions on galena

The various water resources employed during galena flotation caused activation, depression or selectivity effects on minerals due to the presence of different ions in solution. Metal ions in these water resources were adsorbed by the ore, whilst ions associated with gangue minerals (dolomite and quartz) were released into the flotation pulp.

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Study of Flotation Parameters for Copper Recovery from

For flotation tests different conditions were explored in order to search for maximum recovery of copper. The aim of these flotation tests was to obtain theconcentrate with a high grade of As and high recovery of Cu. It has been established that butyl xanthate (BX) was uses as a collector at the dosage of 100 g/t, the optimum flotation time was 16

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Flotation Behavior of Complex Sulfide Ores in the Presence

In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS2) from sphalerite (ZnS) and pyrite (FeS2) using sodium isopropyl xanthate as a collector and 4methyl2pentanol (MIBC) as a frother. Flotation tests were carried out in a D12Denver flotation laboratory cell in the presence and absence of

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Marmatite depression in galena flotation, Minerals

May 01, 2006 · Marmatite depression in galena flotation Marmatite depression in galena flotation Quast, Keith Hobart, Gavin 20060501 00:00:00 Laboratory flotation tests were conducted to investigate the role of pH, zinc sulphate and potassium metabisulphite in the flotation of galena and marmatite in the Broken Hill orebody. Marmatite was depressed under alkaline conditions alone,

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Electrochemical Depression of Galena Aiming at Selective

Electrochemical Depression of Galena Aiming at Selective Sulfide Flotation Achil les Junqueira Bourdot Dutra* a, Aida Espínola a, and João Alves Sampai o b aCOPPE/UFRJPEMM C.P. 68505 21945970 Rio de Ja neiro RJ, Brazil email: [email protected] r

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Selective depression mechanism of ferric chromium lignin

May 10, 2018 · Abstract. Selective recovery of chalcopyrite–galena ore by flotation remains a challenging issue. The development of highly efficient, lowcost, and environmentally friendly depressants for this flotation is necessary because most of available reagents (e.g., K 2 Cr 2 O 4) are expensive and adversely affect the environment.In this study, ferric chromium lignin sulfonate (FCLS), which is a

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LeadZinc ores Danafloat

An important first step entails ensuring the sphalerite surface is not activated with dissolved metal ions, which then makes the sphalerite nonfloatable. The established leadzinc ore flotation processing scheme is to add zinc sulphate (ZnSO4) to the grind to control metal ion activation (sphalerite depression).

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SELECTIVE FLOTATION OF GALENA AND SPHALERITE AT

Batch flotation tests have shown that the use of cyanide alone is not efficient for the depression of sphalerite due to the mineralogical texture of the Rosh Pinah ore. A large quantity of galena locked and/or attached to sphalerite was observed in the lead concentrate. Their prevalence increased with increasing particle size. The use of both

Get price

The synergetic depression effect of KMnO4 and CMC on the

The mechanism of carboxymethyl cellulose (CMC) on the galena surface and the enhancement of KMnO 4 on the depression of CMC to galena were investigated by flotation test, surface adsorption experiments, scanning electron microscopyenergy dispersive spectrometry (SEMEDS), and Xray photoelectron spectroscopy (XPS). Flotation test results indied that the addition of KMnO 4 under

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CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

Lecture 5 Flotation 1 CHAPTER 7– FLOTATION OF SULPHIDE MINERALS Contents: Xanthate adsorption. Oxidation reactions. Activation & depression. Flotation of chalcopyrite, galena, sphalerite, pyrite. Selective flotation. PbZn bulk flotation. Sulphide minerals are floated by sulphydryl collectors (thiocomponds) Adsorption of Sulphydryl Collectors:

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The Depression of Sphalerite during Carbon Preflotation

oxidation was only significant for galena and occurred mostly during preflotation, but the use of cyanide adequately counters any effect on sphalerite recovery. The investigation on the variables that affect the preflotation and lead flotation

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THE EFFECT OF MODE OF OCCURRENCE OF GALENA AND

sulphate. Poor flotation selective was observed in the rougher concentrate of the galena circuit despite the use of excessive amount of sodium cyanide. Batch flotation tests have shown that the use of cyanide alone is not efficient for the depression of sphalerite from the Rosh Pinah ore when milling is

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Optimization of Galena Flotation Process of Irankouh

Optimization of Galena Flotation Process of Irankouh Complex Ore Using A Statistical Design of Experiments Noaparast M, Sarvi M. N. Optimization of Galena Flotation Process of Irankouh Complex Ore Using A Statistical Design of Experiments. In addition in galena flotation it is important to completely remove the zinc in lead concentrates

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Marmatite depression in galena flotation ScienceDirect

The addition of zinc sulphate plus either soda ash or lime for pH control resulted in the depression of the sphalerite while not affecting the flotation of the galena. Plant flotation results showed that the addition of 0.9 kg/t of zinc sulphate at pH 8.5 halved the zinc grade of the lead concentrate at almost one third of the zinc recovery.

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The synergetic depression effect of KMnO4 and CMC on the

The mechanism of carboxymethyl cellulose (CMC) on the galena surface and the enhancement of KMnO 4 on the depression of CMC to galena were investigated by flotation test, surface adsorption experiments, scanning electron microscopyenergy dispersive spectrometry (SEMEDS), and Xray photoelectron spectroscopy (XPS). Flotation test results indied that the addition of KMnO 4 under

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Flotation separation of chalcopyrite from galena by

the slurry oxidation environment and the proper oxidation of galena surface are prerequisites for the depression of galena by sodium humate. The closedcircuit flotation test of copper/lead bulk concentrate shows that the grade and recovery of Cu reach 30.47% and

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Marmatite Depression in Galena Flotation AusIMM

Laboratory flotation tests were conducted to investigate the role of pH, zinc sulfate and potassium metabisulfite in the flotation of galena and marmatite in the Broken Hill orebody. Marmatite was depressed under alkaline conditions alone, however the addition of the two depressants, either individually or combined, resulted in the greatest selectivity.

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Pyrite Depression By Reduction Of Solution Oxidation Potential

PYRITE DEPRESSION BY REDUCTION OF SOLUTION OXIDATION POTENTIAL Department of Mineral Engineering University of Utah Salt Lake City, Utah 84112 for ENVIRONMENTAL PROTECTION AGENCY WATER QUALITY OFFICE Grant Number 12010 DIM December, 1970

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Chemistry Of Pyrite Flotation And Depression 2019

Mar 01, 2018 · Flotation of any given mineral is intimately bound up with the degree of dispersion or flocculation of that mineral in the pulp and it may be aaid(l4) that flotation is. chemistry of pyrite depression in flotation. Our chemistry of pyrite depression in flotation Keep up with the latest news, tips and features right here! Laliberty, Dennis M.,

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Studies of Grinding Media Corrosion from Galvanic

This followed work by a number of authors who identified that galena flotation was strongly potentialrelated [19] [20]. 2) Collectorless flotation of galena, being strongest after grinding with stainless steel or ceramic media, was attributed to oxidation of the galena surface leading to formation of hydrophobic elemental sulphur.

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Selective Flotation of Pyrite from Galena Using Chitosan

Pyrite is a major gangue mineral associated with galena and other valuable minerals, and it is necessary to selectively remove pyrite to upgrade the lead concentrate by froth flotation. In this study, the flotation experiments of a single mineral and mixed minerals were performed using chitosan with different molecular weights (MW = 2−3, 3&minus6, 10 and 100 kDa) as a depressant, ethyl

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LeadZinc ores Danafloat

An important first step entails ensuring the sphalerite surface is not activated with dissolved metal ions, which then makes the sphalerite nonfloatable. The established leadzinc ore flotation processing scheme is to add zinc sulphate (ZnSO4) to the grind to control metal ion activation (sphalerite depression).

Get price

Marmatite Depression in Galena Flotation

Jan 01, 2005 · Laboratory flotation tests were conducted to investigate the role of pH, zinc sulfate and potassium metabisulfite in the flotation of galena and marmatite in the Broken Hill orebody. Marmatite was depressed under alkaline conditions alone, however the addition of the two depressants, either individually or combined, resulted in the greatest

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Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide) (MBS) to the mill, or before aeration and collector addition, can assist sphalerite depression whilst floating galena. Cyanide is not effective for lead activated sphalerite. Add soda ash (2001000 g/t) to the mill feed to raise the pH of the mill discharge to ~99.5. What is the pH of the ore when

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Carboxymethyl Chitosan as a Selective Depressant in

and galena, but it was not the reason for NCMC''s selective depression of chalcopyrite. Mineral surface cleaning tests explained the good flotation result in the absence of any chelating reagents, such as EDTA, since NCMC also possesses the similar function of

Get price

Selective separation of galena and sphalerite from pyrite

In this research, the selective flotation of galena and sphalerite minerals was evaluated from a pyrite rich lead zinc sample. An optimum mixture of selective collectors against pyrite and also organic/inorganic pyrite depressants was obtained in the flotation of galena and sphalerite by

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A study on the effect of active pyrite on flotation of

Flotation of copper sulphides is a traditional technique for processing the sulphide depression of pyrite increased due to the galena and sphalerite was considered by using sodium diisobutyl dithiophosphinate (DTPINa) (Zhong et al., 2015).

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