Through the flotation experiment of pyrite and talc artificial mixed ore, the flotation separation effect of pyrite and talc after the intermolecular assembly of the solid–liquid interface flotation agent was …Web

In batch flotation tests of complex sulfide ore of Mississippi Valley type (MVT) at natural pH (7.8), a separation efficiency of 61% was achieved between galena and pyrite when Chi-g-PAM was used ...Web

The chamber product is also sent further to the selective separation of sphalerite first and of pyrite then. The major challenge is producing of high quality concentrates with high recovery. ... Development of the enrichment technology of difficult to enrich polymetallic pyrite ore of Korbalikhinskoye deposit. Mining J 11:78–83. Google …Web

Galena–Pyrite Separation. Based on the previous studies, lime and calcium hypochlorite are good depressants for pyrite flotation . These reagents were applied individually in this research for the selective separation of galena from pyrite, and the results are displayed in Fig. 3a, b. Results show that both depressants could inhibit the …Web

In this paper, flotation separation of chalcopyrite and pyrite via Fenton oxidation modification in a low alkaline acid mine drainage (AMD) system was …Web

Moreover, selective separation of sphalerite and pyrite was investigated in the absence and presence of A. ferrooxidans and NaCN ... A. ferrooxidans can depress pyrite and thus selectively separate galena and sphalerite from low-grade lead–zinc ore with high pyrite content (Mehrabani et al., 2011; Mehrabani et al., 2010), or chalcopyrite …Web

In this paper, we describe the flotation separation of pyrite-containing porphyry Cu-Mo sulfide ore from Dexing, Jiangxi province. In the first stage, we selected a suitable, environmentally friendly reagent to depress the floatability of pyrite and provide maximum recovery of chalcopyrite and Mo-rich minerals.Web

Separation: To isolate pyrite from other minerals present in the ore, various separation techniques are employed. Froth flotation, magnetic separation, and gravity separation are common methods used to concentrate pyrite. These techniques exploit …Web

The essence is to enhance the hydrophilicity of the pyrite surface with the help of various depressants, thereby preventing the floating of pyrite to achieve its separation from valuable minerals ...Web

Separation effects of sodium polyacrylate (PAAS) and gum Arabic (GA) on flotation of chalcopyrite and magnesium silicate minerals using potassium butyl xanthate (PBX) as collector were ...Web

Separation of sphalerite through copper activation becomes problematical when other minerals within the pulp are inadvertently activated along with the sphalerite. Pyrite (FeS 2) is one such mineral that responds to copper activation and can be floated together with sphalerite [2]. Being the most abundant sulfide mineral pyrite is undesirably ...Web

In this study, to eliminate the adverse effect of serpentine on the flotation of sulfide minerals, the effect of CA on the flotation separation of pyrite from serpentine was systematically investigated through flotation experiments, and the depression mechanisms were also studied through zeta potential measurements, turbidity tests, adsorption …Web

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 (KMnO4) as a pyrite depressant to separate pyrite from chalcopyrite. Flotation and contact angle results indicated that pyrite could be depressed by KMnO4 at pH 7, while KMnO4 …Web

ABSTRACT. Four oxidants, NaClO, KMnO 4, K 2 Cr 2 O 7, and H 2 O 2, were used to promote the flotation separation of pyrite (FeS 2) from arsenopyrite (FeAsS). Ore flotation results indicate that H 2 O 2 has the …Web

Pyrite in complex metallic ore is a widely distributed sulfide on earth, commonly associated with copper, lead, and zinc sulfides, as well as gold and silver [1,2].The production of separate concentrates from ores containing economic amounts of copper, lead, and zinc is complicated [], especially for ores with high pyrite content …Web

This study aimed to investigate the suitability of sodium polyacrylate (PAAS) as a pyrite depressant in a Cu-S separation system through flotation and adsorption experiments.Web

As high-grade ore deposits become depleted, there is an increasing demand to process marginal low-grade ores with complex metallurgical challenges. Orebodies can be rich in pyrite, which is the most abundant sulphide gangue mineral in ore deposits. Pyrite has been depressed to mining tailings for decades.Web

Selective separation 6.1. Chalcopyrite-pyrrhotite separation. Pyrrhotite is one of the commonly associated minerals of chalcopyrite. The... 6.2. Pentlandite …Web

The effect of surface potential regulation on the flotation separation of pyrite and serpentine was investigated by a flotation test of artificial mixed ore, as shown in Figure 8. In Figure 8 a, we can see that …Web

coal pyrite had a lower pyrolysis temperature and greater maximum weight loss than those of ore pyrite, indicating that the existence of organic matter in coal pyrite aected its pyrolysis. The separation diculties of coal pyrite and ore pyrite are different due to the difference in their physicochemical proper - ties.Web

@article{osti_4341578, title = {Removal of pyrite from coal by dry separation methods. Report of investigations}, author = {Abel, W T and Zulkoski, M and Brady, G A and Eckerd, J W}, abstractNote = {Sulfur dioxide emissions from coal-burning power plants can be significantly lowered by removing pyrite from the coal prior to buming. . Conventional wet …Web

Pyrite depression in copper ore flotation often requires large doses of inorganic depressants that lead to high toxicity, high costs, and low selectivity.Thus, this study offers a novel pyrite depressant, polyglutamic acid (PGA), in the selective flotation of chalcopyrite with xanthate as a collector. The flotation and adsorption mechanism on …Web

In pyrite ore beneficiation, As content is one of the important indicators of pyrite concentrate and must be strictly controlled (Chen et al., 2019). For Au-bearing arsenopyrite-pyrite ore it also need separating arsenopyrite and pyrite to obtain respective concentrate with different Au content. ... In this study, the separation of pyrite and ...Web

This separation is difficult due to the oxidation and dissolution of chalcopyrite and subsequent activation of copper on the pyrite surface [120,121]. The main problem in separating chalcopyrite from pyrite is related to the selectivity of the collectors, a product of accidental activation caused by Cu 2+ ions, which dissolve from the valuable ...Web

In laboratory experiments, this new reagent system achieved a substantially better separation of copper-gold sulfide ore and pyrite than the conventional process program. First-principles calculations based on density functional theory (DFT) were used to understand the separation mechanism of the new reagent scheme.Web

The value mineral in the ore is mainly pyrite and the dominant gangue mineral is pyrophyllite [1, 2]. Froth flotation, a physico-chemical separation process that utilizes the difference in surface properties of the valuable minerals and the gangue minerals, is the main technique to recover pyrite from pyrophyllite and other gangue …Web

However, HG-HIMC was mostly applied (at a laboratory scale) in the removal or separation of pyrite minerals from coal fines; it was found inefficient regardless. 38,44,76,77,82,83 ... and B.C Mukherjee, …Web

The value mineral in the ore is mainly pyrite and the dominant gangue mineral is pyrophyllite [1,2]. Froth flotation, a physico-chemical separation process that utilizes the difference in surface properties of the valuable minerals and the gangue minerals, is the main technique to recover pyrite from pyrophyllite and other gangue …Web

Separation of chalcopyrite and pyrite in synthetic seawater. Particle size D80 of 106 µm. pH 8.5 fixed with lime and HCl. 1.5 L Agitair flotation cell. The addition of …Web

One of the most traditional flotation processes is the separation of pyrite (which has to be depressed) from chalcopyrite. In this system, pyrite that possesses …Web

The effects of H 2 O 2 on the flotation separation of chalcopyrite and pyrite in seawater were investigated. Pyrite was more significantly oxidized by 0.05 vol% H 2 O 2 in seawater at pH 8, as compared to that of chalcopyrite. Under optimized condition, a recovery difference of greater than 70% was obtained for chalcopyrite and pyrite.Web

The selective flotation separation of pyrite and chalcopyrite, and the comprehensive utilization of AMD play a vital role in the cleaner production of copper sulfide ore. In this paper, flotation separation of chalcopyrite and pyrite via Fenton oxidation modification in a low alkaline acid mine drainage (AMD) system was investigated.Web

This step enhances the liberation of pyrite from the surrounding rock matrix, facilitating subsequent separation. Separation: To isolate pyrite from other minerals present in the ore, various separation techniques are employed. Froth flotation, magnetic separation, and gravity separation are common methods used to concentrate pyrite.Web

Flotation separation of chalcopyrite/pyrite mixtures under Mg(OH) 2 depression effectively limits pyrite entrainment into Cu concentrates. However, the Cu concentrate is still negatively affected by the low selectivity of depression by Mg(OH) 2 and unavoidable floatability activation of pyrite by surface Cu contamination via galvanic …Web

The activation properties of ammonium oxalate on the flotation of pyrite and arsenopyrite in the lime system were studied in this work. Single mineral flotation tests showed that the ammonium oxalate strongly activated pyrite in high alkalinity and high Ca 2+ system, whereas arsenopyrite was almost unaffected. In mineral mixtures tests, the …Web

The selective separation of sphalerite and pyrite is the final step in their recoveries. Only the efficient separation of sphalerite and pyrite can the two mineral resources of sphalerite and pyrite be sufficiently utilized. Quicklime (CaO) is the most economical and commonly used depressant for pyrite flotation [[18], [19], [20]].Web

Different size fractions of pyrite were treated (heated) in a microwave oven at 2.45 GHz frequency and different power levels. The microwave treated pyrite samples of −420 μm fraction were subjected to magnetic separation at magnetic field intensities of 0.1, 0.3 and 0.5 T. It was found that pyrite was converted to such ferromagnetic ...Web