Since the most common Pb-Zn selective flotation method (Sheridan–Griswold method) sequentially recovers lead and zinc at alkali conditions [ 2 ], the monomineralic flotation tests for galena, sphalerite, and pyrite were performed at pH 9 and 11, which are commonly used pH levels in the industry [ 30 ].
Micro-flotation experiments showed that the combined depressant lime (CaO) and sodium humate (NaHA) depressed the floatability of pyrite more strongly than that of the sphalerite within at pH 11.5 ...
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 copper mineral in nature. In particular, the effect caused by the presence of pyrite, a non-valuable mineral, but challenging for the operation due …
The flotation tests of pure minerals show that in this system the flotation behaviors of sphalerite and pyrite present irreversible characteristics along with the change of pulp …
Pyrite, a ubiquitous sulfide mineral, is often associated with valuable minerals like chalcopyrite, chalcocite, galena, sphalerite, gold and cobalt. Usually, in the flotation separation of multiple sulfide minerals, pyrite is depressed and then removed as the gangue mineral [ 1 ]. However, when processing gold and cobalt bearing pyrite, it is …
In this paper, the effect of pyrite on the activation of sphalerite was investigated by micro-flotation, copper adsorption experiments, X-ray photoelectron spectroscopy (XPS), and …
Semantic Scholar extracted view of "Flotation separation of chalcopyrite from pyrite and sphalerite using a novel collector: An experimental and mechanism investigation" by Xuesong Sun et al.
Semantic Scholar extracted view of "The flotation separation of sphalerite from pyrite through a novel flotation reagent system of FeCl3-CuSO4-aminotriazolethione" by Zhiyong Zhang et al.
In flotation process, the hydrophilic substances and collectors compete for adsorption on the surface of minerals, thereby reducing the floatability of minerals. In this study, the …
In this study, the effects of pyrite on the floatability of lead-activated sphalerite were investigated using flotation tests and electrochemical techniques coupled with contact angle measurements. Moreover, factors important to lead-activated sphalerite floatability were elucidated in detail using dissolution experiments and X-ray photoelectron …
Then, flotation tests of different zinc oxide materials including natural smithsonite before and after sulfidization roasting, natural sphalerite and lead smelter slag (mainly Zn 2 SiO 4) were carried out to further confirm that the treated zinc oxide materials exhibited good flotation responses in conventional flotation system.
Pyrite flotation separation and encapsulation in tailings dams is proposed as a viable way to chemically stabilize tailings. Characterization of potential acid mine generation in tailings led to an innovative process in which acid-generating pyrite is separated by flotation from the coarse tailings and incorporated into the slime zone. …
In this study, the effects of pyrite on the floatability of lead-activated sphalerite were investigated using flotation tests and electrochemical techniques coupled with contact angle measurements.
The first-principles calculations were employed to study the interaction mechanism of the adopted reagents in the recoveries of sphalerite and pyrite from the galena flotation tailing. This study provides an important reference for the recoveries of sphalerite and pyrite from similar galena tailings.
The flotation tests of pure minerals show that in this system the flotation behaviors of sphalerite and pyrite present irreversible characteristics along with the change of pulp potential. Furthermore, through the CDR system, considerable differences in the flotabilities between galena and sphalerite/pyrite are also observed.
Semantic Scholar extracted view of "Pyrite flotation in the presence of metal ions and sphalerite" by Q. Zhang et al.
A sphalerite deportment study using QEMSCAN® was conducted to understand the distribution of the sphalerite grains with varying iron and manganese content during a multi-stage Zn-Pb-Cu flotation of a complex ore. In addition, the study aims to understand the effect of sphalerite chemistry in relation to grain size and liberation.
Flotation of sphalerite generally requires activation by copper ions, added as copper sulphate. Copper ions are also used to activate pyrite [Voight et al., 1994] hence there is the suspicion that accidental activation contributes to the recovery of pyrite (Py) with the sphalerite (Sp).
In this research, the selective flotation of galena and sphalerite minerals was evaluated from a pyrite-rich lead-zinc sample. An optimum mixture of selective collectors against pyrite and also organic/inorganic pyrite depressants was obtained in the flotation of galena and sphalerite by an experimental mixture design.
Using FeCl3 as the depressor against pyrite and CuSO4 as the activator for sphalerite, APTT realized a selective and efficient flotation recovery of sphalerite from pyrite in the …
Figure 5: Pyrite flotation recovery with potassium ethyl xanthate a function of pH. O KEX 2 x 10-5 molar, 58<>C; • KEX 2 x 10- molar, 230C.
Currently, a little natural pyrite (FeS 2) as the tailings after flotation of natural sphalerite (ZnS) is often regarded as solid wastes and discarded; therefore, another utilization of these natural FeS 2 is preferable.
In this paper, the effect of pyrite on the activation of sphalerite was investigated by micro-flotation, copper adsorption experiments, X-ray photoelectron spectroscopy (XPS), and electrochemical measurement. The micro-flotation test results showed that the recovery and flotation rate of sphalerite with copper sulphate as activator and butyl xanthate as …
Sphalerite is a common sulfide mineral, and xanthate is usually used as the collector of sphalerite flotation. In order to realize the simultaneous flotation of sphalerite- and zinc-containing oxide ores, …
Semantic Scholar extracted view of "Depression of lead-activated sphalerite by pyrite via galvanic interactions: Implications to the selective flotation of complex sulfide ores" by Kosei Aikawa et al.
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 increased flotation of sphalerite results from an increased amount of copper on its surface, while the decreased pyrite flotation can be attributed to competitive collector adsorption between the two minerals, provided the collector concentration is low. XPS and ToF-SIMS analyses of the surface of the concentrate and tail samples have.
It often coexists with other sulphide minerals such as sphalerite (ZnS). Flotation has been extensively used to separate galena and sphalerite. Herein, a reagent scheme …
Using FeCl3 as the depressor against pyrite and CuSO4 as the activator for sphalerite, APTT realized a selective and efficient flotation recovery of sphalerite from pyrite in the weakly-acidic medium.
Complex sulfide ores are concentrated mainly through flotation. Sulfide minerals are semiconductors, and pyrite is the major gangue mineral associated with these ores.
It was found that pyrite recovery increased with addition of copper ions when alone, but decreased by more than 25% (absolute) when sphalerite was also present for the pH range 6--9.5. Bench ...
As for the pyrite particles, their lower recovery than the sphalerite particles is the result of a larger proportion of iron hydroxide on their surface inhibiting copper and collector adsorption.
Nevertheless, the floatability of the FeCl 3 -depressed pyrite was hardly recovered by cupric sulfate. Using FeCl 3 as the depressor against pyrite and CuSO 4 as the activator …
A novel thiadiazole derivative (CSC-1) was developed for the flotation of sulfide minerals. The results of flotation tests showed that, compared with the conventionally-used ethyl xanthate, using CSC-1 as the collector, higher flotation recoveries of sphalerite and galena with improved selectivity against pyrite were obtained.
