Flotation results confirmed that pulp aeration was able to selectively depress pyrrhotite and pyrite flotation under ML8 system, thus 3000 g/t lime was cancelled during copper flotation stage, and ...Web
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The selectivity of AA on the flotation of chalcopyrite and pyrite was evaluated by flotation tests along with kinetics and entrainment calculations. The selective separation mechanism of AA for chalcopyrite and pyrite minerals was investigated by contact angle measurements, solution chemistry calculations, zeta potential …Web
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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 …Web
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In general, Cu-Zn sulfide ores consisting of a Cu/Zn ratio of 0.4–1:1 (w / w) [16,17,18,19,20] are processed by a two-step flotation: (i) the selective flotation of Cu minerals while depressing sphalerite using zinc sulfate (ZnSO 4)—a sphalerite depressant—and other gangue minerals such as pyrite (FeS 2) and silicate minerals under ...Web
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These two processes jointly affect the recovery of pyrite. Therefore, in the grinding operation before flotation, and on the premise of ensuring the dissociation of the minerals, over-grinding should be avoided as far as possible or the classified flotation process should be adopted to reduce the adverse effect of fine minerals on flotation.Web
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As discussed in chapter 3, the froth flotation process is an acceptable operation for mineral processing. However, most chemical reagents used in this process are toxic to human health such, as sodium cyanides, sulphites, and potassium dichromates (Lin et al. 2017; Khoso et al. 2019b). In this regard, the implementation of microbial …Web
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This work aims to establish the quantitative relationship between the surface oxidation state of pyrite and flotation performance. In this paper, an efficient method was proposed to prepare pyrite with different oxidation degrees. ... Effect of residual reagents on chalcopyrite losses at Mount Isa Mines copper Operation: Part II - evaluation of ...Web
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Since the main economic value is derived from gold for the Telfer operation, the operational focus is on maximising gold recovery. To achieve this goal, the general philosophy for circuit design and operating strategy is: 1. Targeting a primary grind size optimum for copper recovery. 2. Operating the main flotation circuit in a sequential …Web
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The flotation separation of chalcopyrite from pyrite has attracted increasing attention due to the consumption of vast water resources and depressants. This study …Web
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Water is used as a liquid medium as well as a means of transportation during mining operations. Flotation, in particular, is a water intensive process where water makes up about 80–85% of the ...Web
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Pyrite Flotation.—Copper sulphate in neutral or slightly acid circuit forces the formation of a copper, or possibly a double copper-iron, xanthate with the iron mineral that had been coated or deadened in the first operation. Result: flotation of pyrite. Resume: (a) Iron xanthate; made possible, through a probable combination with copper ...Web
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Pyrite and covellite had high floatability in a range of pH = 4–8, but covellite increased at pH > 8. After adding the depressant (200 mg/L), it was observed that Ca(ClO) 2 had little effect on covellite flotation. However, pyrite flotation was severely …Web
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In the flotation separation of chalcopyrite and pyrite, the commonly used high-lime process often causes problems such as losses of precious metals, blockage in pipelines and environmental pollution.Web
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Pyrite flotation separation and encapsulation in tailings dams is proposed as a viable way to chemically stabilize tailings. Characterization of potential acid mine …Web
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This paper reports the results of flotation tests conducted with a copper-lead-zinc sulphide ore. The major sulphide minerals in the ore are chalcopyrite, galena, sphalerite, marmatite and pyrite ...Web
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In new prospects and current mining operations, pyrite processing represents a significant problem in achieving production goals (Grano et al., 1990, ... understanding why pyrite's flotation performance varies within orebodies and the features affecting its floatability is critical for an efficient depression and possible reclamation of pyrite.Web
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Should it be possible to obtain a good recovery by flotation in a concentrate carrying most of the pyrite or other sulphide minerals, it may prove more economical to adopt this method, regrinding only the comparatively small bulk of concentrate previous to the cyaniding operation. Flotation may also prove to be the more economical process …Web
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Main interest in the processing of complex sulfide ores has focused on the rejection of pyrite and selectivity problem that arises …Web
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During the crushing and grinding operations prior to flotation, new fresh surfaces are created which are naturally hydrophobic. These newly exposed fresh surfaces should overcome the detrimental effect of pre-oxidation to some extent. However, the flotation recovery of stockpiled pyrite ores is still unsatisfactory in practice, e.g., the …Web
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In this study, the selective depression of arsenopyrite in pyrite flotation with in-situ generated nanoparticles was studied. Scanning electron microscope and energy dispersive X-ray spectroscopy (SEM/EDS) detection, solution chemistry analysis, fourier transform infrared spectroscopy (FTIR), adsorption tests and contact angle measurement …Web
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The scraped froth was manually collected for 3 min, the flotation recovery of pyrite samples was calculated based on the mass of froth and tailings. All experiments were performed in one roughing operation. The flotation test was repeated three times under the same conditions and the mean value was taken as the final result.Web
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Recently, improved flotation of carbonaceous auriferous pyrite ores from the Carlin deposits has been maintained by the use of a CO 2 /N 2 gas mixture for conditioning and flotation [37]. Fundamental issues associated with CO 2 /N 2 flotation of pyrite are reported in a separate paper by Vaziri Hassas et al., 2018 [38].Web
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sequential flotation circuit versus Cadia s simple copper gold flotation circuit. The common theme is that pyrite forms the principal floatable concentrate diluent. ... plant design was based on extensive benchscale test work (including locked cycle tests) on drill core and many months of operation of a 30 t h2 1 pilot plant using the ...Web
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In this research, the eco-friendly organic depressant sodium humate (SH) was chosen as a depressant to separate chalcopyrite from pyrite by flotation. The …Web
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Coeur Alaska's Kensington operation is located in Southeast Alaska near Juneau. It is an underground gold operation. ... This study validates the efficiency of auriferous pyrite flotation at the Kensington concentrator. Due to the limited spatial resolution of 10× scan at the voxel size of 1.85 μm, a machine learning method …Web
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The previous study revealed that pyrite recovery was significantly elevated when seawater was used in flotation to replace fresh water, making the flotation more difficult to separate chalcopyrite from pyrite, and the enhanced galvanic interaction between these two minerals in seawater was the main contributing factor (Mu and Peng, 2019).Web
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Abstract. 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 ...Web
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This study investigated the effect of pyrite proportion on chalcopyrite and pyrite flotation via a tri-mineral system (chalcopyrite-pyrite-quartz) with a fixed Cu head grade while varying the pyrite proportion. ... This knowledge is critical for devising control strategies to optimise grinding and flotation operations in mineral processing ...Web
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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 …Web
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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 …Web
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To avoid the influence of surface oxidation on flotation recovery, the pyrite particles (-74 ∼ +38 μm) were ultrasonically cleaned three times before the conditioning and flotation operations. The serpentine samples (-38 μm) were directly used without any pre-treatment before flotation.Web
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As is seen from Table 3, tennantite floated with butyl xanthate has the lowest Beloglazov flotation rate constant.The use of soda increases the flotoactivity of tennantite, which is consistent with research data [].It is known that soda medium promotes the active flotation of pyrite; during flotation of copper-bearing sulphide …Web
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The Copper pyrite concentration process Summarized. The success of an operation of this type is dependent upon the production of a high grade concentrate. This is accomplished by the use of "Sub-A" Flotation Machines which provide the maximum flexibility in flotation operations, thus insuring the maximum grade of concentrates will …Web
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By separating the pyrite from the tailings by flotation during the final years of operation of a plant, two fundamental aspects could be achieved: (1) a neutral tailings can be produced and used as a cover material for the dam containment wall, and (2) encapsulation of the pyrite concentrate with 2–3 m of fine material with little capacity to ...Web
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The unit operations of coper sulfide froth flotation plant were the following: A. ... the amount of copper oxide increased in the rougher feed can be due to the a ctivation of pyrite flotation by ...Web
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Froth flotation is the most common way to prevent pyrite from interacting with xanthate [19], [20]. pH variation directly affects pyrite-xanthate adsorption and the …Web
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The flotation-purified pyrite concentrates were formulated into catholytes; their electrochemical performance was evaluated in both single cells and 5-cell batteries for comparison to data generated under the same discharge conditions for catholytes formulated with HF/HCI purified pyrite. 46 CFR 179.240 - Foam flotation material.Web
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The aforementioned findings show that the negative impact of serpentine on pyrite flotation is caused by fine-grained serpentine sticking to and covering the surface of pyrite (Yang et al ... with the inhibitor introduced before the "Cleaner flotation" operation. Calcium lignosulfonate (CA) is a common inhibitor in the separation of ...Web
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