The recovery of pyrite at 5 min of flotation is 97.8%, and at 7 min of flotation the maximum estimated recovery of 99.1% is reached. In order to produce a concentrate with a pyrite grade closest to 90%, and a recovery above 90%, 3.5 min were selected for the recleaner flotation stage as the optimum flotation time. 3.3.
no flotation can occur. Contact between particles and bubbles can be accomplished in a flotation cell such as the one shown schematically in Figure 5. Figure 5: Simplified schematic of a conventional flotation cell. The rotor draws slurry through the stator and expels it to the sides, creating a suction that draws air down the shaft of the stator.
The effect of conditioning time, pH, collector and frother dosage, and a number of flotation stages on grade and recovery of pyrite were studied at laboratory scale, using a fresh tailing sample ...
The selective sulfidation of lead smelter slag with pyrite in the presence of carbon and Na salts, and the flotation behavior of synthetic ZnS were studied. The effects of temperature, time, pyrite dosage, Na salts, and carbon additions were investigated based on thermodynamic calculation, and correspondingly, the growth mechanism of …
The pyrite flotation results clearly demonstrate that different flotation domains exhibit significantly different pyrite recoveries. Overall, these values are similar to those ... to achieve better liberation or a more optimum particle size distribution is unlikely to result in a relative difference in flotation performance between the ...
The results of the flotation experiments showed that PCA could selectively depress the flotation of pyrite rather than that of chalcopyrite when using SBX as the collector, and the optimum separation performance was realized at the reagent scheme of 60 mg/L PCA and 15 mg/L SBX when pH was 8.16.
In the present work an intense bibliographic search is developed, with updated information on the microscopic fundamentals that govern the behavior of flotation operations of chalcopyrite, the main …
As studied previously, pyrite flotation was depressed in alkaline solutions, but the addition of copper ions significantly increased pyrite recovery within the pH 6-10 range by activating the ...
Figure 3 shows there is an optimum impeller speed at which (coincident) maximum gold and silver recoveries are both achieved. ... was reported in a recent study on auriferous pyrite flotation ...
The obtained results show that the optimal pH value is 7, in this condition; we can get an optimal adsorption and maximum recovery of Pyrite up to 90%. Tailings issued from polymetallic ore flotation of Chaabat el-Hamra mine contain sulfides such as Galena (PbS), Pyrite (FeS2) and Chalcopyrite (CuFeS2).
As a solid waste, kaolinite-type pyrite flotation tailings (KPFT) are a type of low-quality kaolin that contain impurities, such as iron and titanium. In this study, KPFT were calcined at 800 °C for two hours. The calcined production (CKPFT), which is mainly metakaolin, was used as the silicon and aluminum source to synthesize 4A zeolite …
Then, to reach an optimum operational condition in terms of flotation time and reagent usage, a few tests were performed and finally the flotation time of 5 min along with a collector dosage of ...
This shows that the pyrite was less naturally hydrophobic than the galena. This is in keeping with the findings of Ohmura et al. (1993) who found that the contact angle of galena was far higher than pyrite under similar conditions. Hu et al. (2009) also showed evidence of the "weak collectorless flotation" of pyrite. SIBX and SIBDTP were ...
Pyrite flotation separation and encapsulation in tailings dams is proposed as a viable way to chemically stabilize tailings. Characterization of potential acid mine …
It appears that pH 7 is the optimal condition for KMnO 4 to depress pyrite flotation. The flotation behavior of chalcopyrite was also examined for comparison. The chalcopyrite recoveries ranged from 80–90% in the pH region of 3–11 (Fig. 2 b). it seems that the pH of the solution had little effect on the flotation of chalcopyrite with ...
The results of the flotation experiments showed that PCA could selectively depress the flotation of pyrite rather than that of chalcopyrite when using SBX as the collector, and the optimum separation performance was realized at the reagent scheme of 60 mg/L PCA and 15 mg/L SBX when pH was 8.16. Meanwhile, the selective depression …
However, in the flotation of pyrite-galena mixtures chitosan selectively depressed pyrite while galena was floated and the optimum separation result was observed around pH 4 (Huang et al., 2013). The difference indicated that when both minerals were present, chitosan preferred to adsorb on pyrite, which was confirmed by ToF-SIMS measurement.
FLOT-ART's application of advanced electrochemistry in the flotation of some copper and copper–gold ores using non-conventional water sources like seawater has demonstrated that effective depression of pyrite is possible using a low alkaline flotation system (pH < 8.5), once the first pillar of FLOT-ART has been successfully …
Research on the low-potential hydrophobic state of pyrite, with potassium amyl xanthate (PAX) as collector, is reported to help …
The results of the flotation experiments showed that PCA could selectively depress the flotation of pyrite rather than that of chalcopyrite when using SBX as the collector, and the optimum separation performance was realized at the reagent scheme of 60 mg/L PCA and 15 mg/L SBX when pH was 8.16. Meanwhile, the selective depression …
After lead flotation at optimum pH 8, the flotation of zinc at a different pH (5–11.5), with two collector types, was performed to study the recovery and grade of zinc in the zinc concentrate.
Flotation separation of chalcopyrite from pyrite using lime or cyanides as depressants results in serious problems, such as the blockage of pipelines and environmental pollution. Eco-friendly organics are a future trend for beneficiation plants. In this research, the eco-friendly organic depressant sodium humate (SH) was chosen as a …
Although some level of selectivity was achieved at the selected pH and collector concentration, the flotation recovery of both pyrite and arsenopyrite dropped compared with single mineral flotation. Pyrite and arsenopyrite recovery for DTP reduced from 92.85% and 49.61% in the single mineral study to 78.1% and 36.23%, respectively …
Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu2+ ions on pyrite surface. In this study, the radical chain reaction involving the redox cycling of Cu(I/II) induced by sodium metabisulphite (MBS) was exploited to selectively depress the flotation of copper-activated pyrite at pH 8.0. Electrochemical …
Even at optimum pH 6, over dosage of collector will negate flotation selectivity and recover copper as well as iron/lead/zinc. Also …
The synergistic effect of lime (CaO) and TCSS caused a strong depression of pyrite through its flotation separation from chalcopyrite in a wide pH range of 7–12. The …
B.Tapley et al. researched the inhibition behavior of methylarsonic acid (MMA) on the pyrite/arsenopyrite separation, and they found that MMA can strongly inhibit the arsenopyrite flotation while ...
Liu et al. (2009) found that the selective depression of pyrite in the flotation of chalcopyrite-pyrite mixtures was due to the preferential adsorption of lignosulfonate …
Does anyone have flotation data defining optimum Eh and pH for arsenian pyrite flotation? Arsenian pyrite contains 0.58% As and is a type p semiconductor.
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 concentrate and consequently reduce the quality of concentrate. Highly efficient pyrite depressants can be selectively adsorbed on the surface of pyrite to improve its hydrophilicity, thereby …
The results showed that the flotation recovery of pyrite could be remarkably affected by DO concentration in pulp; it increased first and then decreased with the increase of DO concentration; an optimal DO concentration (DO = 3.3 mg/L) was helpful for pyrite flotation recovery; both the formation of dixanthogen and the avoidance of excessive ...
The CB system performed better than did the CIB system in the flotation separation of chalcopyrite and pyrite. Under the optimal flotation conditions, the Cu grade, S grade, and chalcopyrite recovery of the flotation concentrate in the CB system were 2.90%, 0.70%, and 18.88% higher than those in the CIB system.
Finally, a flotation test was performed to enrich Zn and Pb in the sulfidation product. A flotation concentrate with 8.78% Zn and 9.25% Pb was obtained, and the recovery of Zn and Pb reached 56.14% and 75.94%, respectively. ... reaction time and pyrite dosage. The optimum operating process parameters of sulfidation roasting were determined to ...
A mobile flotation facility, based on two 5 L minicells equipped with on-line monitoring of pH, dissolved oxygen and pulp potential, was used to study flotation of pyrite from zinc concentrate (i ...
At first, the optimal condition for flotation of pyrite were obtained. In flotation without collector and frother reagents, pyrite recovery was 20.63%. By adding pine oil as frother in two concentrations of 40 ppm and 100 ppm, pyrite recovery reached 55.57% and 57.5%, respectively. Then the flotation was examined with collector and …
The results of the flotation experiments showed that PCA could selectively depress the flotation of pyrite rather than that of chalcopyrite when using SBX as the collector, and the optimum ...
