Flotation separation of pyrite and chalcopyrite with …

The separation of chalcopyrite and pyite is not fully solved, and thus more efficient depressants are still needed in industry. This paper used potassium permanganate (KMnO 4) as a pyrite depressant to separate pyrite from chalcopyrite.Flotation and contact angle results indicated that pyrite could be depressed by KMnO 4 at pH 7, while …

New insights into mechanisms of pyrite flotation …

After the ultrasonic treatment, the slurry was dewatered with a 38 μm aperture screen to generate pyrite sample free of oxidation products to be used for subsequent …

A case study on marmatite- pyrite/pyrrhotite selective flotation …

During the process of Zn-S selective flotation, although lime may be not an effective pyrite/pyrrhotite depressants alone and the synergistic depression effect of lime combined with other depressants has been confirmed and reported [17], [42], [49], it still relies more on lime to depress pyrite/pyrrhotite flotation in the exprimental study on ...

Effect of regulating dissolved oxygen concentration in pulp …

The phrases 'moderate oxidation' and 'severe oxidation' were only used qualitatively to express the oxidation degree. In the flotation process, it is inevitable to inflate a large amount of gas into the pulp to achieve separation of minerals. ... The correlation between DO concentration and pyrite floatability was established and the …

Collectorless flotation of oxidized pyrite

In the first part, the effect of ultrasonic treatment on the collectorless flotation of oxidized pyrite in de-ionized (DI) water was investigated by micro-flotation experiments, as a function of sonication time (5–90 min), flotation time (30–120 s) and pH (pH 3, 6, 10). In the second part of this research, the effect of CO 2 saturated DI ...

Flotation of Pyrite

Flotation of Pyrite. Table of Contents. This paper is a record of the first of a series of tests on sulfide minerals to be made by the metallurgical department of the …

Fenton oxidation modification mechanism of pyrite

@article{Ding2024FentonOM, title={Fenton oxidation modification mechanism of pyrite and its response to Cu-S flotation separation: Experiment, DFT, XPS and ToF-SIMS studies}, author={Zhan Ding and Mingjun Chen and Jiaqiao Yuan and Anmei Yu and Huixin Dai and Shaojun Bai}, journal={Applied Surface Science}, year={2024}, …

(PDF) Differential flotation of pyrite and arsenopyrite: …

A 2 kg/t hydrogen peroxide addition and 120 g/t PAX collector concentration gave the best separation efficiency with 63.1% pyrite and 5.1% arsenopyrite recovery into the flotation concentrate.

Study on the flotation mechanism of cobalt-bearing pyrite: …

In this study, methyl xanthate (CH 3 OCS 2 Na) was selected as flotation collector. The electronic structure of the pure and Co-doped FeS 2 (100) crystal plane and the mechanism of methyl xanthate (CH 3 OCS 2 Na) adsorption on FeCoS 2 (100) are investigated using first-principles calculations. The behavior and nature of cobalt in the …

New insights into mechanisms of pyrite flotation …

After the ultrasonic treatment, the slurry was dewatered with a 38 μm aperture screen to generate pyrite sample free of oxidation products to be used for subsequent micro-flotation tests. The cleaned pyrite sample was then used to prepare a 5% w/w pyrite slurry for micro-flotation tests with 100 mL deionized water in a 200 mL beaker.

Advances in depressants used for pyrite flotation separation …

Pyrite is separated from other minerals mainly by flotation. However, the hydrophilicity of pyrite is affected by many factors, causing it to easily enter the …

Pyrite Flotation: A Review

2Fe(OH)3 (s, surf) + 2X- + 6H+ ↔ X2 (l, surf) + 2Fe+2 + 6H2O. (1) Dixanthogen formation would also occur by the reduction of dissolved oxygen in the solution by the catalytic effect of pyrite ...

"Depression of pyrite in polymetallic sulfide flotation using …

"In this work, Chitosan-grafted-Polyacrylamides (Chi-g-PAMs) were studied, for the first time, as selective depressants of pyrite in the flotation of base metal sulfides. Fundamental studies of the adsorption behavior of Chi-g-PAM on model sulfide minerals indicated that Chi-g-PAM was more selective to pyrite's surfaces as compared to base metal sulfides.

Effect of pyrite textures and composition on flotation …

Pyrite flotation recovery as a function of solution potential at different pH's (Tao et al., 2018). The main factor affecting the electrochemical processes is the electrochemical potential at the mineral and solution interface (Hu et al., 2009). This …

The depression of copper-activated pyrite in flotation by …

1. Introduction. Pyrite (FeS 2), the most abundant sulfide mineral, is undesirably associated with minerals of economic value such as chalcopyrite, sphalerite and galena (Wang and Forssberg, 1991, Wang, 1995, Dimitrijevic et al., 1996, Jiang et al., 1998).To produce and utilize the valuable components, selective depression of pyrite in …

Minerals | Free Full-Text | Carrier Flotation Using Coarse …

Carrier flotation is a technique that can recover fine particles by using coarse carrier particles during the flotation process. In heterogeneous carrier flotation, coarse …

Advances in depressants used for pyrite flotation …

Pyrite accounts for about 60%–70% of the total sulfur in high-sulfur coal (Wang 2013). The main forms of pyrite in coal are finely dispersed pyrite, large blocks of pyrite, invaded …

Effect of pyrite textures and composition on flotation …

Pyrite flotation recovery as a function of solution potential at different pH's (Tao et al., 2018). The main factor affecting the electrochemical processes is the electrochemical potential at the mineral and solution interface (Hu et al., 2009). This potential is determined by the presence of oxidizing and reducing species in the solution.

The selective flotation of arsenopyrite from pyrite

Flotation tests were conducted to compare the arsenopyrite depressing effect of MAA with pH control, potassium permanganate and pre-aeration. The recovery and selectivity were optimised by varying the collector and depressant concentration, pH and the effect of copper sulphate addition. It was found that with MAA, depression of arsenopyrite …

The depression of pyrite in selective flotation by different …

The depression of pyrite flotation by polysaccharides is due to the selective adsorption of polysaccharides polymers on pyrite surface. Bulut et al. (2011) investigated the depression effect of starch on pyrite flotation and found that starch was effective at a low dosage (1.7 mg L −1) and more pronounced at alkaline pH (10) than natural pH ...

(PDF) Pyrite flotation in the presence of galena. Study on …

Therefore, pyrite served as a cathode in galvanic interactions with galena. Floatability of pyrite was performed alone and as a mixture with galena in the ratios of pyrite to galena equal to 1:4 ...

Froth Flotation of Chalcopyrite/Pyrite Ore: A Critical Review

Chalcopyrite and pyrite show recovery of over 90% when working with SBX and MIBC at pH 4–10. An increase in pH to 11.5 allowed lowering the pyrite recovery to …

Enhanced pyrite depression through nitrogen-aerated flotation …

1. Introduction. Pyrite as an associated gangue mineral of polymetallic sulfide ore, needs to be selectively depressed during the flotation process [1]pared to other inhibitors, lime is the most widely used due to its availability, low cost, and effectiveness [2], [3].The addition of lime to pulp during flotation creates a high alkalinity environment that …

(PDF) Pyrite Flotation: A Review

Pyrite Flotation: A Review. N. E. Altun and T. Güler. Muğla University, Mining Engineering Depar tment 48000 Muğla, Turkey. Ü. Akdemir. Cumhuriyet University, Mining Engineering Dep artment ...

The low-carbon flotation separation of chalcopyrite from pyrite …

The flotation results of the three collectors to pyrite are listed in Fig. 3, which reveals that the floatability of pyrite significantly decreased with the increase of pH values from 4.0 to 11.0 under 1.0 × 10 −6 mol·L −1 collector. The flotation recovery of pyrite dropped below 30 % at pH > 8.0.

Depression of pyrite flotation by yeast and bacteria

Microorganisms, such as the bacteria Thiobacillus ferrooxidans, have been reported to depress pyrite flotation (Elzeky and Attia, 1987; Atkins, 1990). However, the dependence of the depression on the type of organism or on suspension pH is still being determined. In this study, the relative effectiveness of various microorganisms …

Solving the mystery of natural pyrite flotation

Pyrite is the world's most abundant sulphide mineral and can take many forms. It can be a highly problematic gangue species in base metal sulphide flotation. Pyrite is known to readily report to flotation concentrates, diluting their value and resulting in excess sulphur dioxide production during smelting.

Nanosecond electromagnetic pulse effect on phase composition of pyrite

The X-ray photoelectronic spectroscopy data give the grounds for statement that the powerful nanosecond electromagnetic pulse pretreatment improves sorption activity of pyrite surface and lowers sorption of a collector at arsenopyrite surface. The research results are verified by test data on the powerful nanosecond electromagnetic pulse effect …

Recovery of pyrite from copper tailings by flotation

The pyrite grade in the fresh tailing sample and in the flotation product was determined indirectly from the content sulfur, copper and iron. Calculations carried out considering the elemental chemical composition presented in Table 1 and the mineralogical species that contained sulfur, identified by the XRD analysis, allowed to determine that …

Fenton oxidation modification mechanism of pyrite and its …

The recovery of pyrite and chalcopyrite are 82.2 %, and the contact angles are 96.03° and 47.81° at pH = 8, respectively. The process of pyrite separating from chalcopyrite was further confirmed by the artificially mixed minerals flotation experiments. Provided with an ideal flotation condition, the recovery of pyrite

Effect of Physisorption of Collecting Agent on Flotation of Pyrite …

Abstract Flotation of pyrite is examined as function of pH and ferrous ion concentration. To explain depression of pyrite flotation in the neutral pH range and at high concentration of ferrous ions, the mechanism of physisorption of a collecting agent is used. It is experimentally determined that interaction products of xanthate and ferrous ions …

Role of Montmorillonite, Kaolinite, or Illite in Pyrite Flotation

Flotation tests suggested that the detrimental effect of clay minerals on the flotation of pyrite increased as follows: montmorillonite > kaolinite > illite. With the help of rheology measurements, it was found that montmorillonite significantly increased pulp viscosity, which in turn substantially reduced pyrite recovery and grade.

A case study on marmatite- pyrite/pyrrhotite selective flotation …

However, when sphalerite or marmatite is associated with pyrite and pyrrhotite, the recovery of Cu-activated sphalerite or marmatite by flotation is vulnerable to the disturbance of associated pyrite and pyrrhotite, which can be attributed to the following possible reasons: (1) During the process of copper-activation for sphalerite or marmatite, …