Pyrite Depression Copper Flotation

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Pyrite Depression in Copper Flotation

The Pyrite Depression in a Copper Only Flotation circuit is simple enough. If your froth flotation system only tries to recover chalcopyritecopper, you need to bring the plants pH up to the other side right side of the PYRITE curve. The more flotation collector you have on, the higher you will need to increase that pH for effective pyrite depression. You also need to insure your pyrite

The depression of copperactivated pyrite in flotation by

The depression of copperactivated pyrite in flotation in the presence of bio s was related to the adsorption amount of bio s on pyrite surface. The correlation between bio structures and adsorption isotherms reveals that the high depression effect of DP1775 might be due to its high molecular weight leading to a high

Depression of pyrite in porphyry copper flotation

Depression of pyrite in porphyry copper flotation Ian Wark Research Institute Australian Research Council Special Research Centre For Particle and Material Interfaces M. Zanin and S. Farrokhpay Case Study

A study on the effect of active pyrite on flotation of

Abstract: Active pyrite is one of the most undesirable phenomena in the flotation of porphyry copper ores. Misreported pyrite into copper concentrates decreased the grade and recovery of copper. In this study, the effective parameters on the flotation process including grinding condition and chemical parameters were evaluated in order to

Postregrind selective depression of pyrite in pyritic copper

The pyrite rougher concentrate was obtained by twostage copper and pyrite rougher flotation using the conditions in Table 1 and reported in Agorhom et al. 2013 . However, in the present studies, the focus is to examine flotation depression of pyrite after regrinding the combined pyrite rougher concentrates using aeration and DETA . The

The depression of pyrite in selective flotation by different

The mechanism underpinning the depression role of lignosulfonatebased bio s on the flotation of unactivated pyrite and copperactivated pyrite has been investigated. In the flotation of unactivated pyrite at pH 5, dixanthogen is the main species responsible for pyrite flotation, the formation of which is accompanied by the reduction of

The role of sodium sulfide in the flotation of pyrite

Flotation tests and CryoXPS analyses in this study indi e that pyrite may be depressed in copper flotation with the addition of lime despite copper activation occurring on pyrite surface. The hydrophilic calcium and iron oxidation species may form on pyrite surface and be responsible for pyrite depression.

Sodium Metabisulfite MBS for pH Control and Pyrite Depression

Sodium Metabisulfite aka MBS is used for pH control in froth flotation to control Pyrite depression. Below is a graph showing pH VS pyrite recovery at various collector addition rates. It is also used to prevent flotation of sphalerite by copper activation in the presence of Tennantite/Covellite in the ore. For pyrite flotation, you see maximum iron/pyrite depression using Sodium Metabisulfite

Pyrite depression in copper flotation

Pyrite depression in copper flotation Published on February 5, 2018 February 5, 2018 1 Likes 6 Comments. Report this post Justin Masapi Follow Process metallurgist at kansanshi Mine solwezi.

An improved flotation test method and pyrite depression by an

Flotation of coppermolybdenum sulphide ores in seawater entails critical challenges such as selective recovery of molybdenite, effective pyrite depression, and reducing the lime addition required to reach highly alkaline conditions. It is essential that laboratory flotation tests aimed at solving

PDF A Review of the Flotation of Copper Minerals

depression of pyrite may be a problem becaus e the pyrite can be activated by copper ions generated during th e grinding ope ration 7 . Some copper sulphide ores can be partially oxidized, also

Technical Note The selective otation of arsenopyrite from pyrite

pyrite, giving rise to a higher selectivity compared to the blank test no MAA present . 3.4. Copper sulphate addition The activator copper sulphate was added at a dosage of 0.05 kg/t to test if the otation characteristics of pyrite could be improved resulting in greater recovery. To determine whether the activating eect of the copper

Flotation of sphalerite and pyrite in the presence of sodium

promotes the oxidation of copper on pyrite as copper hydroxide, but has no effect on sphalerite. This increase in the amount of oxidation products on the pyrite surface and, as a result, decrease in xanthate adsorption may explain the depression of the flotation of pyrite in the presence of sodium sulfite. q2001 Elsevier Science B.V.

The kinetics modeling of chalcopyrite and pyrite, and the

2017 . The kinetics modeling of chalcopyrite and pyrite, and the contribution of particle size and sodium metabisulfite to the flotation of copper complex ores. Particulate Science and Technology: Vol. 35, No. 4, pp. 455461.

Surface chemistry of activation of limedepressed pyrite in

The depression of pyrite by lime is attributed to the surface formation of Ca OH 2, CaSO4 and Fe OH 3 as determined by XPS analysis. Xanthate flotation tests show that oxalic acid and other

Pyrite Depression In Copper Flotation

Depression of pyrite in porphyry copper flotation. 20141218 Pyrite in the feed was Cu activated , and adsorbed xanthate even at high pH gt10.5 , becoming highly floatable Limited pyrite depression was achieved by increasing the pH with lime Na 2SO 3and DETA were effective in preventing/reversing the activation of pyrite in the presence of O2, reducing pyrite recovery by 50.

Minerals Free FullText The Depression and Adsorption

The rejection of pyrrhotite and pyrite has become a longstanding problem in the copper ore industry. This paper describes the first successful depression and adsorption mechanism of a novel and nonhazardous reagent, polyglutamic acid PGA , on pyrrhotite in the selective flotation of chalcopyrite with xanthate as the collector, making use of various laboratoryscale measurement techniques.

DEPRESSION OF PYRITE MINERAL WITH CYANIDE AND FERROUS/FERRIC

Key words: pyrite, depression, cyanides, iron salts 1. INTRODUCTION In industrial practice of flotation of sulphide leadzinc and copper ores, pyrite, as a constant presented mineral in these ores, depresses in the various stages of selective flotation or it separates in concentrate. This mineral is commonly collected

Technical Note The selective otation of arsenopyrite from pyrite

pyrite, giving rise to a higher selectivity compared to the blank test no MAA present . 3.4. Copper sulphate addition The activator copper sulphate was added at a dosage of 0.05 kg/t to test if the otation characteristics of pyrite could be improved resulting in greater recovery. To determine whether the activating eect of the copper

study problems of pyrite folotation of copper sulphide ore

Aug 12, 2014 optimum conditions for the flotation of nickel, copper and cobalt from a The nickelcopper sulphide ore used in this study was supplied by Trojan Nickel .. copper ore by flotation, Physicochemical Problems of Mineral Processing, 42, pp. Depression of pyrite in the flotation of copper ores, DPhil Theses,

Pyritegold recovery in copper rougher flotation tailings CORE

An aeration stage was applied both at the head of copper flotation copper rougher feed and after regrinding of the copper rougher tailings, before gold/pyrite selective flotation. Also, different collector regimes, involving sodium isobutyl xanthate SIBX and Nbutoxycarbonylnbutyl thionocarbamate XD5002 , have been tested.

Pyrite depression in marmatite flotation by sodium glycerine

separate copperactivated sphalerite from pyrite in the presence of isobutyl xanthate. It was found that all the PAMs depressed pyrite flotation with little or no sphalerite. SUN et al 4 used mercapto organic compound DMPS as depressant in the separation of copperactivated marmatite from pyrrhotite in the presence of butyl xanthate.

The Increased Recovery Project at the Phu Kham CopperGold

conditions employed in flotation for pyrite depression using a high lime pH environment. The general association of gold with pyrite in Phu Kham ore was the major reason for gold loss. In mid2010 the ore feed to the plant changed from mainly supergene secondary copper sulfide mineralisation to

The depression of quartz in sulphide flotation

hence depression of the gangue minerals in the flotation of sulphides from an artificial pyritequartz mixture. 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 not 14 Wark, I.i. Principles of Flotation.

Pyritegold recovery in copper rougher flotation tailings

The present study investigates the effect of regrinding and aeration on the separation of pyrite from gold in copper rougher flotation tailings 0.07 Cu, 0.61g/t Au, tail grades . An aeration stage was applied both at the head of copper flotation copper rougher feed and after regrinding of the copper rougher tailings, before gold/pyrite selective flotation. Also, different collector regimes

Chapter 7 Electrochemical Control of PyriteActivation by Copper

flotation plants is to reject pyrite to produce a marketable grade concentrate. More recently, clean air regulations mandate pyrite removal from smelter feeds to reduce the emission of acid rain precursor. Pyrite, like a number of other sulfides, may be activated for more efficient flotation by interaction with dissolved heavy metals ions, e.g

Copper activation option for a pentlanditepyrrhotite

Different sulphide ores respond differently in the prospect of copper activation to thiols for froth flotation. With the BCL SelebiPhikwe ore body, pentlanditepyrrhotitechalcopyrite cooccur and there is the constraint of fine pentlandite dissemination in the pyrrhotite, so that liberation is limited. In the presence of pentlandite, pyrrhotite can even be galvanically depressed. In this

Chalcopyrite and pyrite floatabilities in the presence of

Misreported pyrite into copper concentrates dramatically declines copper grade and its recovery. In this study, the effect of sodium sulfide, sodium metabisulfite SMBS , and their dosages 100, 200, 300, and 400 g/t were investigated on chalcopyrite and pyrite floatabilities in a high pyritic copper sulfide ore.

Depression of Arsenopyrite Flotation and its Separation from

Description. In this paper it is recommended that pyrite is to be separated as froth from arsenopyrite by selective depression of arsenopyrite in strong alkaline medium 1 , by oxidation with chlorinated lime II , by couse of chlorinated lime with sodium carbonate III , and by modifi ion with L reagent knowhow without filtering to get rid of residual copper ions after Cu activation

The Effect of Regrinding Chemistry and Particle Breakage

oxidising conditions were beneficial to coppergold flotation and pyrite depression. The surface analysis showed that the improved flotation was attributed to a combined effect of several factors, including pyrite surface oxidation which reduced its floatability, increased collector adsorption on

chemistry of pyrite depression in flotation

Read quotThe depression of copperactivated pyrite in flotation by bio s with different compositions Microelectronics Reliabilityquot on DeepDyve the largest online . Get Price pyrite depression in copper flotationGrinding Mill . pyrite depression in copper flotation Consequently the flotation behaviour of Cu Au and pyrite was examined on the

Investigation of the reasons for copper and gold loss in the

These studies indi ed that for greater than 20 pyrite skarn in the concentrator feed blend, lower than expected gold and copper recoveries were achieved in the cleaner bank. Pulp and surface chemical analytical techniques indi ed layers of oxide coatings existed on all particles, depressing flotation.

Chapter 7 Electrochemical Control of PyriteActivation by Copper

flotation plants is to reject pyrite to produce a marketable grade concentrate. More recently, clean air regulations mandate pyrite removal from smelter feeds to reduce the emission of acid rain precursor. Pyrite, like a number of other sulfides, may be activated for more efficient flotation by interaction with dissolved heavy metals ions, e.g

Effect of Regrinding Conditions on the Flotation of

The depression of pyrite is difficult in the cleaner stage as well due to copper activation, a process which is also highly dependent on the grinding environment. In this study, different grinding media, including mild steel and stainless steel, was used in the regrinding to produce different regrinding chemistry, such as, pH, Eh, and iron

Pyrite depression during coal flotation Part I Inorganic

This investigation is an exploratory study to evaluate a large number of potential pyrite depressants for use during coal flotation. Subsequently, the more promising reagents can be evaluated in detail. Several reagent egories such as alkalis, lime, oxidizing agents, reducing agents, specific inorganic ions and dispersants that were found to be effective pyrite depressants are discussed

Chalcopyrite and pyrite floatabilities in the presence of

Misreported pyrite into copper concentrates dramatically declines copper grade and its recovery. In this study, the effect of sodium sulfide, sodium metabisulfite SMBS , and their dosages 100, 200, 300, and 400 g/t were investigated on chalcopyrite and pyrite floatabilities in a high pyritic copper sulfide ore.

SEPARATION OF COPPER MINERALS FROM PYRITE WESTON D,CA

A process of separating copper minerals from pyrite wherein a flotation concentrate containing copper minerals and pyrite is reground in the presence of lime and subsequently conditioned at a pH of 12.0 or more for a predetermined period sufficient to depress the pyrite, with optional additions of sulfhydryl collector, cyanide and dispersing agent, and the conditioned pulp is subjected to

Copper Pyrite Separation Method

Pyrite Depression Froth Flotation Sulphide and Oxide Metallurgist . You can try bulk flotation of Pyrite and Zinc and then go for magnet separation. . Now we use copper sulphate to activate cyanide depressed sphalerite while doing so we must . HGMS can develop 20000 gauss strength in the process zone. Chat Online Flotation of Pyrite. 3 May

depression carbonate depression in flotation

Pyrite Depression By Reduction Of Solution Oxidation Potential ABSTRACT A study of pyrite depression by reducing agents with potassium ethylxanthate as collector indi es that pyrite may be depressed effectively in the flotation of both lead and copper sulfide ores without the use of poisonous cyanide salts.

CopperCobalt ores Danafloat

These are often associated with copper minerals and pyrite and pyrrhotite iron sulphides. Two different flotation separation strategies are used. Differential flotation sequence: A differential coppercobalt flotation separation which begins with selective copper flotation by raising the slurry pH to 10 with lime and using a dithiophosphate

Flotation behaviors of pyrites with different chemical

However, the differences observed in practice originate from the types and the amount of ions dissolved from the associated minerals. It was found that copper ions activate the pyrite flotation due to the formation of copper xanthate and dixanthogen.

Pyrite flotation: Magma Copper Company 39s Superior Facility

A description of the technical aspects of the pyrite flotation operation is provided below. 2.2 Pyrite Flotation and Drying The pyrite flotation operation at Superior uses preexisting equipment. The system manipulates the pH of a normal copper flotation operation in order to float pyrite. After first adding collectors and

The depression of copperactivated pyrite in flotation CORE

The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different bio s, modified from lignosulfonate, were examined to depress the flotation of copperactivated pyrite.

WO2013169141A1 Method and apparatus for separation of

A method and an apparatus for the separation of the mineral components of a pyrite containing copper molybdenum ore by flotation. The method comprises grinding the ore in the presence of soda ash in an open circuit to produce an aqueous ore slurry subjecting the slurry to a collective flash flotation step 10 in the presence of soda ash and sodium sulphide to recover a first part of metal

An investigation of pyrite depression in processing CORE

Abstract. During the 1990s copper ore from the Wheal Hughes mine at Moonta was processed at Kadina for copper and gold recovery by flotation. There is renewed interest in processing coppergold ores from this historic mining area in South Australia.

Influence of pyrite content on the flotation of chalcopyrite

In the flotation of copper ores several processing plants report that copper recovery is affected by the proportion and type of pyrite in the ore, with the effect becoming more intense when the feed ore particles are fine, i.e. in fine regrinding. In this work, a model mix mineral system consisting of chalcopyrite and pyrite with varying pyrite content in the range 2080 wt. was used to

THE EFFECT OF SULPHITE ON THE XANTHATEINDUCED FLOTATION 2002

Various techniques have been used to identify the plausible mechanisms of interaction of sulphite with both collector and pyrite surface. It was found that sulphite depressed the xanthateinduced flotation of copperactivated pyrite with nitrogen or air purging at pH 7. However, the depression effect was greater when air was used.

SEPARATION OF PYRITE FROM ARSENOPYRITE BY FLOTATION by AYHAN

Figure 4.3. Flotation of pyrite with S7 at 8.410quot6 mol/1 collector concentration 79 Figure 4.4. Flotation of pyrite recovery against S7 concentration at pH 3 79 Figure 4.5. Recovery of pyrite with 2 mg/1 F2B concentration 80 Figure 4.6. Recovery of pyrite and quartz using Fl at different pH 82 Figure 4.7.

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