The solution chemistry of sodium silicate and implications for pyrite flotation have been studied. In addition to flotation and sedimentation tests, electrophoresis, inductively coupled plasma (ICP) tests, and X-ray photoelectron spectroscopy (XPS) have been used. The flotation and sedimentation results show that lizardite causes problems in the …
REAGENTS USED IN FLOTATION OF GOLD ORES. Conditioning agents are commonly used, especially when the ores are partly oxidized. Soda ash is the most widely used regulator of alkalinity. Lime …
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.
The higher association of gold with pyrite rather than chalcopyrite is a challenge in copper–gold flotation circuits, since pyrite is widely recognised as a gangue mineral in copper ores. Understanding the mineralogy, liberation and association of gold as well as the associated gangue minerals in a flotation feed is crucial to optimise gold ...
The improvement in hydrophilicity and low flotation recovery in the case of pyrite ground with iron medium are mainly due to high surface roughness and serious corrosion. ... Strengthening the flotation recovery of silver by fine grinding with special ceramic-medium stirred mill (SCSM), steel ball-medium stirred mill (SBSM) and ball mill …
@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 …
Ten grams of coarse pyrite particles (–125+106 µm size fraction) were mixed with 20 g of ultra-fine chalcopyrite particles (D 50 = 3–3.5 µm) to observe the effect of coarse pyrite particles as a carrier on the flotation of ultrafine chalcopyrite particles. The parameters here were the same as those in section 2.2.2, except that the froth ...
The low flotation recovery of fine particles is mainly due to the low probability of bubble–particle collision, while the main reason for poor flotation recovery of coarse particles is the high ...
The finer the serpentine slime is, the lower the pyrite recovery will be. Quartz particles do not interfere with pyrite flotation. However, the addition of quartz particles increases the adsorption of collector on pyrite surface and limits the detrimental effect of serpentine on pyrite flotation. The fine-grained quartz is more effective.
Abstract An analysis of flowsheets for processing sulfide and oxide copper ores, reagent modes, processing equipment, and flotation indicators in some domestic and foreign processing plants and productions is carried out. Autogenous and semiautogenous mills are commonly used in the primary grinding stage in ore processing plants, which …
The concentrate thus obtained (called "acid tailings") is submerged in the slime zone to prevent oxidation. The pyrite flotation tailings (called "neutral tailings") are easily dewatered and placed in the dyke. Due to its higher density relative to the fine material, the pyrite in the tailings dam sinks down and is isolated from the air.
Fine pyrite particles (−26 μm) has not good flotation recovery due to its small size, though the slight hydrophobic flocculation can be found due to self …
Flotation experiments for finely ground chalcopyrite (D50 ∼ 3 µm) were conducted with and without coarse pyrite (–125+106 µm) using potassium amyl xanthate as a collector.
Different milling conditions, such as wet or dry, and use of different grinding media have a great impact on the flotation performance of sulphide minerals. In the present study, the effects of wet and dry grinding and the use of different grinding media, such as mild steel (MS) and stainless steel (SS), were investigated on a Cu-sulphide ore. The …
As the gravity beneficiation is limited by particle size, the flotation recovery of fine-grained cassiterite has attracted much attention by researchers in recent years (Qin et al., 2012b, ... The interaction between grinding media and collector in pyrite flotation at neutral and slightly acidic pH. Miner. Eng., 145 (2020), Article 106063.
In single mineral flotation, serpentine depressed the −150 + 74 μm and −74 + 37 μm galena while the −10 μm galena was floatable. Different from galena, serpentine has strong depression effect on all the three sizes of pyrite. So the flotation separation of fine grained galena and pyrite can be achieved.
Effect of pyrite textures and composition on flotation performance: A review. Pyrite can have variable textures and chemical composition. Presence of complex …
Chalcopyrite and pyrite flotation was higher than 90% (pH 3–10), but after adding konjac glucomannan (10 mg/L), pyrite recovery was less than 5% when the pH …
removed from the coal matrix by ore grinding during flotation.Fine-grained pyrite mainly occurs in the form of framboi ̈dal pyrite, disseminated pyrite, and monomer pyrite with a size of 0.69− ...
Fine particles were more likely to become hydrophilic under low-temperature plasma modification and yet the critical oxidation degree was also higher. The coarse particles being plasma modification presented a poor flotation recovery due to its low adsorption density of collector, although its oxidation degree was lower than the fine size …
Abstract. The practice of the flotation of pure gold and gold-bearing ores such as tellurides, aurostibite, kerogen, pyrite, pyrrhotite, copper-gold ores and mixed sulphides is reviewed. The factors which influence the choice of collectors, pH and Eh, are discussed as well as the application of differential flotation.
In addition, another important use of flotation is to purify coal, reduce ash in fine coal, and remove fine pyrite from coal. Flotation is also suitable for treating fine …
@article{osti_63221, title = {Interfacial electrochemistry of pyrite oxidation and flotation. 2: FTIR studies of xanthate adsorption on pyrite surfaces in neutral pH solutions}, author = {Wang, X H}, abstractNote = {Infrared spectra of short carbon chain ferric xanthanes (Fe(SSCOCR){sub 3}) were systematically characterized and compared with …
Pyrite displays good flotation performance in the presence of xanthate at acidic to neutral pH conditions due to the formation of dixanthogen and possibly iron …
New trends to flotation of fine particles are carrier flotation, column flotation and bio- flotation. The carrier flotation technique is applied for upgrading of Egyptian kaolin and graphite. The ...
When untreated pyrite was used as the carrier, the attachment of fine chalcopyrite to the carrier was limited, and flotation recovery of fine chalcopyrite was not enhanced. When pyrite was treated with Cu 2+, Cu 2+ was adsorbed on the surface of pyrite; this enhanced its hydrophobicity, which promoted the. Declaration of Competing …
To explore the occurrence and distribution characteristics of fine-grained pyrites in coal and the effect of pyrite particle size on flotation efficiency, coal samples from Guizhou province and ...
Flotation reagents can change the surface properties of minerals, leading to differences in the interaction between mineral particles and affecting the mutual aggregation or dispersion of particles. In this work, we studied the role of activator copper sulfate, collector butyl xanthate and frother terpineol in adjusting the potential energy of pyrite …
Pyrite flotation can be significantly depressed by fine serpentine (−10 µm) due to the hetero-coagulation between pyrite and serpentine at pH 9. However, when …
The interaction between grinding media and collector in pyrite flotation at neutral and slightly acidic pH. Minerals Engineering, 145 106063, 106063. doi: 10.1016/j.mineng.2019.106063 ... Effect of saline water on the flotation of fine and coarse coal particles in the presence of clay minerals. Minerals Engineering, 66, 145-151. doi: …