pyrite flotation 1

Results of collector-less flotation tests performed by Yoon et al. [90] showed that the pyrite flotation occurred in potential ranges of 0.1 to 0.8 V and −0.3 to 0.4 V (SHE) at pH 4.6 and 9.2, respectively. The results also showed that the flotation recovery at pH 4.6 was considerably higher than recovery at pH 9.2.

Pyrite flotation was induced by xanthate (1.1 × 10 −4 mol/L) and activated by copper cations (2.6 × 10 −4 mol/L). In the presence of sulfite (1.9 × 10 −3 mol/L), the …

In Fig. 2, the flotation recovery of pyrite can be observed as a function of pH in the absence and presence of lizardite mineral.The flotation recovery of pyrite in the absence of lizardite is very high (>85%) under acidic and neutral conditions. As the pH was increased, pyrite recovery decreased due to formation of hydrophilic iron oxy-hydroxy …

Fig. 4 (Right) shows that the flotation recovery of pyrite for 5–20 min hydrodynamic cavitation time was essentially identical, i.e., 99 ± 1%. However, the flotation kinetics differed significantly, as shown in Fig. 5 where pyrite flotation recovery varies with flotation time for different cavitation time and the inset illustrates how the ...

@article{osti_238020, title = {Interfacial electrochemistry of pyrite oxidation and flotation. 1: Effect of borate on pyrite surface oxidation}, author = {Wang, X H}, abstractNote = {The interfacial chemistry of pyrite is of great industrial importance in complex sulfide ore flotation, coal desulfurization, acid mine drainage mitigation, and …

Keywords Pyrite · Flotation · Depressant · Coal · Mineral 1 Introduction Pyrite (FeS 2), one of the most common sulde minerals, is not only associated with coal and nonferrous …

Carrier flotation is a technique that can recover fine particles by using coarse carrier particles during the flotation process. In heterogeneous carrier flotation, coarse mineral particles of different minerals are used as carriers to recover fine mineral particles. By using Cu2+-treated pyrite particles as carriers, fine chalcopyrite particles recovery …

Flotation recoveries of pyrite and chalcopyrite in binary flotation systems with a 1 × 10 −2 M initial [Mg] and b non-Mg addition under different EDTA dosage, xanthate = 2.5 × 10 −5 M, pre-oxidation time: 30 min. The values and standard deviations show the mean values and ranges of duplicates

The investigation of the sulfur oxidation behavior is key to understand pyrite oxidation [30].In this study, we utilized the amounts of sulfur species formed, an indicator of mineral surface oxidation, to evaluate pyrite surface oxidation [14, 24].As illustrated in Table 1, at the same pH, the amounts of sulfur oxyanions formation with H 2 O 2 addition were …

Micro-flotation tests showed that chalcopyrite was selectively separated from pyrite using PAAS as a pyrite depressant in the pH range 2–4. A satisfactory separation effect, a copper concentrate with 30.02% Cu and a recovery of 94.16% was obtained in artificial mixed minerals tests.

Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to demonstrate influence of pyrite mineralogy on the flotation of copper (sulphidic) ores and develop alternative conditions to improve the performance. …

Keywords Pyrite · Flotation · Depressant · Coal · Mineral 1 Introduction Pyrite (FeS 2), one of the most common sulde minerals, is not only associated with coal and nonferrous metals (chalco-pyrite, galena, and sphalerite) (Wang and Forssberg 1991), but also it is the primary carrier of some precious metals

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 …

Bubble load and top of froth measurements per size class were carried out in a rougher flotation circuit containing sulphide copper minerals and pyrite. This circuit consists of four parallel banks of seven 130 m 3 mechanical cells. Results of testing the first rougher cell (approximately 69% Cu recovery), showed that 40–60% of pyrite in the ...

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 …

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 …

4. Conclusions. (1) The micro-flotation results of single minerals indicated that seawater oxidation significantly improved the difference in flotation recovery between chalcopyrite and pyrite. 87.0% recovery was obtained for chalcopyrite while 17.3% recovery was obtained for pyrite when seawater oxidation for 3 d.

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 maximum recovery of pyrite is 24.1%, and the recovery of pyrite is less than 10% at pH＞6.9. When using CaO as pH adjustor, there is no obvious change for the recovery of chalcopyrite at pH=7−11, while the Fig.1 Recoveries of chalcopyrite and pyrite as function of pulp pH value in different conditions with DLZ as collector

Flotation results of 1:1 pyrite and chalcopyrite mixture as a function of KMnO 4 concentration Full size image For the mixture of natural pyrite-chalcopyrite (1:1 mass …

@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}, …

Pyrite flotation separation and encapsulation in tailings dams is proposed as a viable way to chemically stabilize tailings. Characterization of potential acid mine …

1. Introduction. Molybdenum is a pivotal metal of utmost importance to the development of emerging strategic fields such as machinery, aerospace, national defense and military industries, electronics and electrical engineering [1], [2].Molybdenum is mainly sourced from molybdenite which is often found in association with pyrite [3].Both minerals exhibit …

Key words: flotation; dolomite; pyrite; depressor; mechanism 1. Introduction Pyrite is the main raw material for making sulfuric acid. Pyrite cinder still contains many valuable components that are difficult to separate and purify, because of the property changes during high temperature roasting.

A strong drop-off in pyrite recovery was observed at DO = 23.1 mg/L, and it only reached 37.83%. The change trend of pyrite flotation recovery indicates that an appropriate DO concentration is helpful to pyrite flotation, too high or too low DO concentration is not conducive to pyrite flotation recovery.

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 …

Dodecyl amine (DDA), potassium amyl xanthate (PAX), and Sodium Isopropyl Xanthate (SIPX) are three types of collectors examined in the single and mixed forms for …

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 ...

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 …