pyrite depression in copper flotation

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pyrite depression in copper flotation

Investigation of Flotation Parameters for Copper Recovery from .

Feb 22, 2012 . Keywords: enargite, chalcopyrite, arsenic, flotation, copper resource. 1. Introduction. In the mineral industry, many copper and iron sulfide ores such as covellite (CuS), chalcocite (Cu2S), chalcopyrite. (CuFeS2) and pyrite (FeS2), contain arsenic (As) and antimony (Sb) bearing minerals such as enargite.

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Copper Zinc ores Danafloat

The flotation separation and recovery approach is quite similar to the Pb Zn sulphide separation process. Sphalerite is depressed with zinc sulphate addition to the grind with sodium sulphide as an option for enhancing pyrite depression. Copper is floated in the first differential flotation stage at a 10 11 pH with lime.

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Role of starch and metabisulphite on pure pyrite and pyritic copper .

Abstract. Depression of pyrite is very important in sulphide ore flotation. This paper investigates the role of non toxic depressants on the flotation of pyrite. Starch and meta bisulphite were used as a depressant for pure pyrite sample and a pyritic copper ore at two different pHs values. pH was 6.5 and 10 in pure pyrite study.

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massimialiano zanin 2 Gecamin

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

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Depressants and dispersants

Iron sulfide (pyrite, pyrrhotite, marcasite) depressant used in the flotation separation of base metal sulfides. Alternative partial cyanide replacement to depress iron and zinc sulfides in Pb / Zn flotation. UNIMAX® SD300. A specialty depressant for pyrite gangue, sphalerite and pyrrhotite in lead and copper flotation systems.

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massimialiano zanin 2 Gecamin

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

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depression of pyrite in the flotation of copper ores Research .

DEPRESSION OF PYRITE IN THE. FLOTATION OF COPPER ORES by. Shuhua He. (B. Eng.; M. Eng.) Ian Wark Research Institute. University of South Australia. Thesis Submitted to the University of South Australia for the Degree of Doctor of Philosophy in Applied Science. May, 2006. OF SOUTH AUSTRALIA. LIBRARY.

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depression of pyrite in the flotation of copper ores Research .

In this case, the selective depression of pyrite flotation was attributed to the immobilisation of copper by xanthate at the chalcopyrite surface or its removal from solution, both mechanisms resulting in a reduced copper activation of pyrite. Pyrite depression and chalcopyrite flotation, and therefore mineral separation, were.

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Chalcopyrite and pyrite floatabilities in the presence of sodium .

Jun 2, 2016 . Various methods have been introduced to decrease pyrite flotation by preventing copper activation ore, if it has already occurred, by addition of hydrophilic depressants. One of the very important characteristics of pyrite flotation is that in alkaline pH values, pyrite can be well depressed and in acidic pHs, the.

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Pyrite Flotation With Xanthate Under Alkaline Conditions .

The extensive literature on sulfide flotation indicates that pyrite poorly floats under alkaline condition. Xanthate concentration has a positive effect on pyrite flotation, but above a pH of 11, pyrite seems to be strongly depressed, independently of the concentration in xanthate. In this investigation, aeration and xanthate.

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Effect of pH on Pulp Potential and Sulphide Mineral Flotation

this study the effect of pH on potential in solution and sulphur minerals flotation is discussed with various ... Pyrite. Chalcopyrite. Platinum. Galena. Figure 4. Electrodes potential as a function of pH. Flotation of pure minerals. The flotation of sulphide minerals and their . flotation will be depressed (Janetski et al.,1977). pH.

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Role of starch and metabisulphite on pure pyrite and pyritic copper .

Abstract. Depression of pyrite is very important in sulphide ore flotation. This paper investigates the role of non toxic depressants on the flotation of pyrite. Starch and meta bisulphite were used as a depressant for pure pyrite sample and a pyritic copper ore at two different pHs values. pH was 6.5 and 10 in pure pyrite study.

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Diethylenetriamine depression of Cu activated pyrite hydrophobised .

Dec 21, 2017 . Request (PDF) . Diethylenetriamine d. . In copper sulphide flotation, copper adsorbs on pyrite through superficial oxidation of the copper minerals (e.g. chalcopyrite) which promotes pyrite flotation in the presence of xanthate. This inadvertent activation of pyrite by copper ions is undesirable in copper.

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Pyrite Depression By Reduction Of Solution Oxidation Potential

ABSTRACT A study of pyrite depression by reducing agents with potassium ethylxanthate as collector indicates that pyrite may be depressed effectively in the flotation of both lead and copper sulfide ores without the use of poisonous cyanide salts. More specifically, the use of sodium sulfite as the depressant may result in.


Influence of the Interaction between Sphalerite and Pyrite on . MDPI

Jan 12, 2018 . flotation rate of sphalerite with copper sulphate as activator and butyl xanthate as collector were . selective flotation of sphalerite, pyrite is usually depressed by using lime. In alkaline pH ranges . activation of pyrite will reduce the difference in flotation performance between sphalerite and pyrite, and cause.

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Modelling of pyrite depression process by lime in copper and zinc .

Jun 26, 2012 . As the result of theoritical and experimental investigations in laboratory and industrial scale physico chemical models for optimal conditions of copper, zinc and iron sulphides flotation and depression have been derived, verified and proved. Physico chemical models derived are based on the mechanism.

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US20110155651A1 Separation of copper minerals from pyrite .

The invention relates generally to metal recovery and particularly to recovery of copper, molybdenum and/or gold minerals by flotation in waters with a range of buffering capacities and/or salinities. .. Compared to tap water, conventional techniques employed for pyrite depression do not perform as well in salt water.

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Chalcopyrite and pyrite floatabilities in the presence of sodium .

Jun 2, 2016 . Various methods have been introduced to decrease pyrite flotation by preventing copper activation ore, if it has already occurred, by addition of hydrophilic depressants. One of the very important characteristics of pyrite flotation is that in alkaline pH values, pyrite can be well depressed and in acidic pHs, the.

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An improved flotation test method and pyrite depression by an .

Flotation of copper molybdenum 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 these problems give reliable,.

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Pyrite Depression Froth Flotation (Sulphide & Oxide) Metallurgist .

There are reagents that can partly replace copper sulphate (for example Nickel sulphate). Some R&D effort is required here to select the suitable pre activator. Cyanide is very effective but use starvation amounts. Cyanide is poisonous but it decomposes very fast. Cyanide depression of pyrite is enhanced in alkaline pH.

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Pyrite Depression in Copper Flotation 911 Metallurgist

Mar 17, 2017 . 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.

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Depressants for Pyrite / Flotation depressants / Applications / Home .

Pyrite depression. The efficiency of PIONERA BioPolymer versus sodium cyanide in copper recovery. PIONERA BioPolymers can offer a significant economic advantage in flotation of iron/sulfur bearing minerals in reducing smelter penalties, increasing grade and recovery of metallic concentrates. Flotation results indicate.

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The depression of copper activated pyrite in flotation by biopolymers .

Jun 17, 2016 . The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified from.

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Pyrite Depression By Reduction Of Solution Oxidation Potential

ABSTRACT A study of pyrite depression by reducing agents with potassium ethylxanthate as collector indicates that pyrite may be depressed effectively in the flotation of both lead and copper sulfide ores without the use of poisonous cyanide salts. More specifically, the use of sodium sulfite as the depressant may result in.

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Diethylenetriamine depression of Cu activated pyrite hydrophobised .

Dec 21, 2017 . Request (PDF) . Diethylenetriamine d. . In copper sulphide flotation, copper adsorbs on pyrite through superficial oxidation of the copper minerals (e.g. chalcopyrite) which promotes pyrite flotation in the presence of xanthate. This inadvertent activation of pyrite by copper ions is undesirable in copper.

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Modelling of pyrite depression process by lime in copper and zinc .

Jun 26, 2012 . As the result of theoritical and experimental investigations in laboratory and industrial scale physico chemical models for optimal conditions of copper, zinc and iron sulphides flotation and depression have been derived, verified and proved. Physico chemical models derived are based on the mechanism.

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US5171428A Flotation separation of arsenopyrite from pyrite .

On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate rich in pyrite and tailings rich in arsenopyrite. . the arsenopyrite was depressed during sphalerite flotation using additions of base, cyanide, and xanthate collector and then subsequently activated with copper sulfate.

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The depression of copper activated pyrite in flotation by biopolymers .

Jun 17, 2016 . The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified from.

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Processing copper porphyritic ore SRK Consulting

All copper sulfides are processed through flotation using xanthates at 6 12 pH. When pH values are lower, it is better to use aeroflot type reagents instead of xanthogenates. If molybdenite flotation is required to separate it from copper sulfides, the pH should be no more than 11 to provide pyrite depression, and lime is.


Pyrite Depression in Copper Flotation 911 Metallurgist

Mar 17, 2017 . 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.

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