Chemistry Of Pyrite Depression In Flotation

The depression of pyrite in selective flotation by ...

01/10/2016· Janetski et al. (1977) studied the depression of pyrite flotation from an electrochemical viewpoint and found that an increase in pH facilitated pyrite oxidation. It was suggested that oxidation of pyrite replaced oxidation of xanthate as the dominant anodic process. Thus, the formation of dixanthogen is inhibited at high pH.

Surface chemistry of activation of lime-depressed pyrite ...

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...

A review on electrochemical behavior of pyrite in the ...

25/03/2017· Pyrite as the most abundant sulfide mineral is often associated with valuable sulfide minerals, coal and gold. It is very important to study its electrochemical behavior in the flotation process.

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 chalcopyrite-copper, you need to bring the plant’s 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 role of sodium metabisulphite in depressing pyrite in ...

In response to the high pyrite recovery in copper flotation using seawater, this study investigated the role of sodium metabisulphite (MBS), a widely used pyrite depressant, in depressing the flotation of copper-activated pyrite to identify a solution to maximising pyrite rejection.

The Role of Lime in Xanthate Flotation of Pyrite

The depression of pyrite with lime in xanthate flotation was investigated by means of flotation tests, adsorption studies and electrokinetic potential measurements. The results obtained are summarized as follows: 1. In xanthate flotation of pyrite, lime is more effective than …

Pyrite depression by AMBS - Froth Flotation (Sulphide ...

Pyrite depression by AMBS - Froth Flotation (Sulphide & Oxide) - Metallurgist & Mineral Processing Engineer While I was studying flotation using seawater, I had a problem with understanding the reason why Aeration and Sodium Metabisulfite is used as a Pyrite depressant in Cu-Mo flotation in seawater.

The chemistry of flotation activation and depression of ...

Flotation studies demonstrated that freshly ground arsenopyrite and pyrite are non-floatable in the absence of xanthate as a collector or strong iron-complexing agent: EDTA (hydrophilic). Good flotation was observed for both minerals with EDTA or ethyl xanthate. The floatability depends strongly on the pH value and concentration. With EDTA the minerals show good floatabilities in the pH range ...

The Role of Lime in Xanthate Flotation of Pyrite

The depression of pyrite with lime in xanthate flotation was investigated by means of flotation tests, adsorption studies and electrokinetic potential measurements. The results obtained are summarized as follows: 1. In xanthate flotation of pyrite, lime is more effective than sodium hydroxide as a depressant. 2.

(PDF) Diethylenetriamine depression of Cu-activated …

The significant depression of pyrite in the presence of DETA under the aerated condition was due to increased amount of iron oxy–hydroxides (Fe–O/OH), copper oxides and Cu (I)–DETA hydrophilic...

Effects of type and dosages of organic depressants on ...

01/12/2018· Organic depressants which have been used for pyrite flotation included polysaccharide polymers (starch, dextrin, Guargum, carboxymethyl cellulose and chitosan), polyacrylamides (PAMs), wood extracts (biopolymers of lignosulphonate), DETA, etc.. The chemical states and reactions of polymer compounds are complex.

(PDF) A review on electrochemical behavior of pyrite in ...

It has been found that moderately oxidizing conditions are favorable for collector-less flotation of pyrite while strongly reducing or oxidizing potentials lead to its depression. Increasing the ...

An Insight into Flotation Chemistry of Pyrite with ...

The flotation chemistry between pyrite and isomeric xanthates (butyl xanthate and isobutyl xanthate) was investigated by means of adsorption experiments, surface tension tests, and molecular dynamic simulations in this work. The flotation chemical results were confirmed and further interpreted by quantum chemical calculations. The experiment results demonstrated that the isobutyl xanthate ...

Cyanide chemistry and its effect on mineral flotation ...

01/11/2014· Of all the sulphide minerals studied so far, the depression of pyrite by free cyanide is the best understood. Free cyanide at a concentration as low as 10 mg/L NaCN was found to significantly depress pyrite flotation using sodium isopropyl xanthate (SIPX) as collector (Wet et al., 1997).

Pyrite Depression - Froth Flotation (Sulphide & Oxide ...

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Flotation. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else’s ...

CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

Flotation of pyrite is possible below pH 11 with short chain xanthates, but is depressed above about pH 11 Depression of Pyrite 1. Hydroxyl as depressant (OH-) The hydroxyl ion functions a depressant for two reasons: With high hydroxyl activities, above pH 11, xanthate oxidation to dixanthogen does not occur. The following reaction goes to the left under these conditions

The chemistry of flotation activation and depression of ...

Flotation studies demonstrated that freshly ground arsenopyrite and pyrite are non-floatable in the absence of xanthate as a collector or strong iron-complexing agent: EDTA (hydrophilic). Good flotation was observed for both minerals with EDTA or ethyl xanthate. The floatability depends strongly on the pH value and concentration. With EDTA the minerals show good floatabilities in the pH range ...

DEPRESSION OF PYRITE MINERAL WITH CYANIDE AND FERROUS ...

Key words: pyrite, depression, cyanides, iron salts 1. INTRODUCTION In industrial practice of flotation of sulphide lead-zinc 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 with sulfhydryl anionic active collectors - xanthates. In practice of lead ...

(PDF) A review on electrochemical behavior of pyrite in ...

Effect of pH on pyrite depressionIt has been found that the pyrite flotation recovery decreases with an increase in pH [54,63,89,122,. This inverse relation between the recovery flotation and pH is associated with the relative abundance of the hydrophilic hydroxide to the hydrophobic sulfur species.

An Insight into Flotation Chemistry of Pyrite with ...

The flotation chemistry between pyrite and isomeric xanthates (butyl xanthate and isobutyl xanthate) was investigated by means of adsorption experiments, surface tension tests, and molecular dynamic simulations in this work. The flotation chemical results were confirmed and further interpreted by quantum chemical calculations. The experiment results demonstrated that the isobutyl xanthate ...

Pyrite Depression - Froth Flotation (Sulphide & Oxide ...

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Flotation. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else’s ...

Cyanide chemistry and its effect on mineral flotation ...

Cyanide used as a depressant for pyrite in the flotation of chalcopyrite from a polymetallic ore was found to result in flotation (activation) of sphalerite. This was thought to be due to leaching ...

CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

Flotation of pyrite is possible below pH 11 with short chain xanthates, but is depressed above about pH 11 Depression of Pyrite 1. Hydroxyl as depressant (OH-) The hydroxyl ion functions a depressant for two reasons: With high hydroxyl activities, above pH 11, xanthate oxidation to dixanthogen does not occur. The following reaction goes to the left under these conditions

The depression of quartz in sulphide flotation

hence depression of the gangue minerals in the flotation of sulphides from an artificial pyrite-quartz 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. Australasian ...

The Effect of Regrinding Chemistry and Particle Breakage ...

surfaces which improved chalcopyrite floatability. At the same time pyrite flotation was depressed due to the insufficient copper ions for activation, leading to an effective separation of chalcopyrite from pyrite. However, these flotation differences were not significant at the rougher stage and this

Chemistry of Flotation - Maurice C. Fuerstenau, J. D ...

Chemistry of Flotation: Authors: Maurice C. Fuerstenau, J. D. Miller, Martin C. Kuhn: Edition: illustrated: Publisher: Society of Mining Engineers of the American Institute of Mining, Metallurgical and Petroleum Engineers, 1985: Original from: Pennsylvania State University: Digitized: Nov 16, 2009: ISBN: 0895204363, 9780895204363: Length: 177 pages : Export Citation

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