No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
Froth flotation is widely acknowledged as the most efficient and economically viable technique for mineral processing, particularly in the extraction of chalcopyrite and galena from mineral deposits (Sehlotho et al., 2018).Xanthates (such as butyl xanthate) are commonly employed as collectors during the flotation process to enhance the ability of chalcopyrite and …
Up to yet, little attention has been paid to explore novel depressants in the flotation separation of sphalerite and galena. For example, sodium pyrophosphate and sodium citrate have been utilized as an effective combined sphalerite depressant because it could be hydrolyzed to release OH – in the solution and then reacted with Zn 2+ to form hydrophilic …
Abstract The mechanism of carboxymethyl cellulose (CMC) on the galena surface and the enhancement of KMnO4 on the depression of CMC to galena were investigated by flotation test, surface adsorption experiments, scanning electron microscopy-energy dispersive spectrometry (SEM-EDS), and X-ray photoelectron spectroscopy (XPS). Flotation test results …
There are three main reasons for this phenomenon: (1) galena and chalcopyrite show similar floatability following exposure to collector; (2) Cu- and Pb-based species that dissolve from chalcopyrite and galena can affect the flotation performance and surface features of both minerals; (3) collectors that are added in chalcopyrite-galena mixed ...
The flotation results demonstrate that Zn 2+ and SO 3 2− provide a synergistic depression effect on sphalerite and the aerofloat collectors exhibit more selectivity towards galena.
A same XFGC-Ⅱ flotation machine (5 ∼ 35 g) as above was also used. 2.0 g pure galena and sphalerite samples (mass ratio 1:1) with particle size of 38 ∼ 74 μm were used for each test. Other flotation operations were consistent with single-mineral micro-flotation tests.
Galena (PbS) and sphalerite (ZnS) are the main sources of lead and zinc and usually associated in sulfide deposits. Because of the similar surface properties of these two minerals, their flotation separation is a persistent topic of interest in mineral processing [1].Xanthate is the most commonly used collector for sulfide mineral flotation, but its poor …
The flotation test results showed that 60 mg/L SMKL had a significant influence on depressing calcite flotation, while it had a slight effect on scheelite flotation. ... The galena flotation rate ...
flotation separation curves for a batch flotation test (calculated using flotation modelling techniques) performed over different time periods and for tests in which the concentrate has been refloated. The flotation separation curve is a plot of recovery versus the flotation rate of a particle in a particular flotation process. If a flotation ...
In this study, the effect of Pb 2+ on the flotation behaviour of galena using sodium humate (NaHA) as a depressant was investigated through micro-flotation tests, contact angle measurements, FTIR analysis, ICP tests and atomic force microscopic measurements. The micro-flotation test illustrated that Pb 2+ could greatly enhance the depression effect of NaHA and …
The flotation time was set to 2 min in all of the single-mineral experiments. Fig. 1 Flowsheet of flotation tests on single minerals The closed-circuit flotation test of copper/lead bulk concentrate was achieved in an XFG single-trough flotation machine with effective volumes of 0.25, 0.5, 0.75 and 1.0 L. The flowsheet is shown in Fig. 2.
In each test, 1.0 g galena and different content of pyrite were added to the flotation tank at the same time, and the slurry was adjusted according to the flotation test. After that, the pyrite and galena were screened with a sieve, rinsed with ultra-pure water and put into a vacuum drying oven for drying, and XPS surface analysis was performed ...
In this paper, a novel collector S-benzyl-N-ethoxycarbonyl thiocarbamate (BET) was utilized used as flotation collector to selectively separate galena from a polymetallic …
Before the micro-flotation test, 2.0 g galena, pyrite or their mixture (1:1 mass ratio) was ultrasonically washed 3 times with 200 mL DI water to remove their surface oxides. Then, the cleaned mineral samples were mixed with 200 mL DI water, and the pulp pH was regulated by adding HCl or NaOH solutions. After agitation of 2 min, the collector ...
Galena associated with jamesonite has poor floatability [1], because the floatability of jamesonite is similar to that of galena [2,3]. To get a better understanding of collectorâˆ'mineral interaction mechanism, flotation property and electrochemical behavior of these minerals, flotation test and flotation electrochemistry are essential.
The galena flotation behavior and mechanism in four solutions were explored by micro-flotation experiments, contact angle determination, Zeta potential measurements and XPS analysis.
In the flotation test, at a concentration of 10 mg/L sodium butyl xanthate (SBX) and pH 9, adding 50 mg/L POCA can reduce the flotation recovery of galena from 83.50 % to below 5 %, whereas the recovery of chalcopyrite was almost influenced.
A study of the role of oxygen in xanthate flotation of galena, pyrite, and chalcopyrite was reported by Ireneus Klymowsky, and the results obtained suggest that adsorption of collector on pyrite decreased in oxygen saturated solutions, and that bubble adhesion requires the presence of dissolved oxygen. However, each mineral required a ...
Dichromate was applied to practical production early because of its better effect on the flotation separation process of copper-lead sulfide ores, but it was banned because of its toxicity of heavy metal chromium pollution and human health hazards (Bulatovic, 2010, Perry et al., 1984).Sulfite or sulfur dioxide (Grano et al., 1997, Heidel et al., 2013) gas as a depressant …
Passivation-flotation separation test for galena-chalcopyrite mixture. To investigate the separation behavior of galena-chalcopyrite mixtures using this new method, a passivation test was carried out for the mixture, and then flotation separation was performed on passivated samples with or without adding collectors and inhibitors.
The flotabilities of chalcopyrite and galena with sodium humate (HA) and ammonium persulfate (APS) as the depressant were studied by flotation test, adsorption measurement and infrared ...
Also, It has been shown that, Pb(OH) + adsorbed on the galena or sphalerite surface can reduce the collector ability for the galena flotation in the pH values between 7 and 9.5, but had a ...
Grinding with steel media adversely affects the flotation response of galena. Electrochemical measurements, flotation tests, and examinations were employed to identify interactions between galena and mild steel. Iron oxide, hydroxide, or sulfate species that formed on the galena surface upon contact with mild steel decreased its floatability, with the time of contact and aeration …
The ways to obtain successful Separation of Copper and Lead into individual Concentrates, several process approaches can be examined; bulk copper-lead flotation with a reverse flotation stage depressing copper, the same bulk flotation with a reverse flotation to depress lead and a sequential copper-lead-zinc flotation circuit as well as a simple cleaning of …
In the current study, the effect of pulp pH and the collector type parameters on the galena and sphalerite flotation from a complex lead–zinc–iron ore was investigated. The ethyl …
The structure of the xanthates' hydrocarbon (C–H) chain is one of the major factors which affect flotation recovery. The effectiveness and the collecting power of xanthates increase with increasing chain length and vary depending on the chain structure: branched and straight chains. In this regard, the influences of length (2–5 carbon) and structure (straight: normal and …
H 2 O 2 is an oxidizing agent that is stronger than O 2, which can oxidize galena and depress its flotation (Nooshabadi and Rao, 2014b). H 2 O 2 could accelerate anodic oxidation and increase the ...
Depressing lead while floating copper is a commonly employed technique to realize the flotation separation of chalcopyrite and galena, where the galena depressants play an essential role in recovering chalcopyrite [3], [16], [17].Dichromate, phosphate, silicate, and sulfite are routinely used as inorganic depressants for inhibiting galena in chalcopyrite flotation [10], …
In each flotation test, 15 g of sample that was < 75 µm was transferred to a cell of 150 ml capacity (Clausthal flotation equipment), conditioned with pH modifier, collector ... that the 30 wt% chromium medium produced a much higher galena flotation recovery than the mild steel medium (Peng, et al., 2002). Since wet-ground galena with mild ...
The maximum flotation recoveries were obtained depending on both the presence and concentration of MIBC which increased higher encounter/collision probability of air …
