The high flotation yield at pH 4 is due to the formation of sulfur-rich products and dixanthogen (Leppinen, 1990, Wang and Forssberg, 1991, López Valdivieso et al., 2005). The yield at pH 8 has been explained to be due to the formation of iron hydroxide-xanthate complexes on pyrite surface (Fornasiero and Ralston, 1992). The depression of ...

The traditional differential flotation adds ZnSO 4 to deactivate sphalerite, but it has some demerits, such as increasing activation difficulty, enlarging the pollution risk of heavy metals and ...

DOI: 10.1016/J.MINPRO.2013.04.010 Corpus ID: 93582078; Selective depression of sphalerite by chitosan in differential PbZn flotation @article{Huang2013SelectiveDO, title={Selective depression of sphalerite by chitosan in differential PbZn flotation}, author={Peng Huang and Mingli Cao and Qi Liu}, journal={International Journal of …

The contribution of the experiments presented here is the evaluation of tannin as a selective depressant in sulphides differential flotation, particularly for pyrite depression, defining the conditions leading to the optimal selectivity and efficiency in the flotation process. ... (1980), and this can be explained by surface oxidation of pyrite ...

Froth flotation is a physicochemical process that is used to separate fine mineral particles from aqueous suspensions by selective attachment of some types of minerals to air bubbles. Froth flotation is the most important mineral processing technology for the production of valuable mineral concentrates from which metals and minerals are …

At pH 3, the flotation recovery of chalcopyrite dropped. Conclusions. Chitosan, a naturally occurring polymer, was exploited in the differential flotation separation of Cu–Pb sulfide minerals (chalcopyrite and galena). In single mineral flotation of chalcopyrite and galena, both minerals were depressed by chitosan without any …

Semantic Scholar extracted view of "Reexamining the functions of zinc sulfate as a selective depressant in differential sulfide flotation--the role of coagulation." by M. Cao et al. ... {Reexamining the functions of zinc sulfate as a selective depressant in differential sulfide flotation--the role of coagulation.}, author={Mingli Cao and Qi Liu ...

Flotation is the process of separation of beneficial minerals from a mixture by creating froth on which minerals separate out. This is a method of mineral processing in which different minerals are separated selectively. The ores containing multiple metals, such as lead, copper and zinc, can be selectively extracted by using froth floatation.

Flotation recovery of pyrite and arsenopyrite at pH 6.4 and 120 g/t: A) DTP and B) PAX as a function of time. Schematic representation of the effect of collector type and H2O2 on depression of ...

The high flotation yield at pH 4 is due to the formation of sulfur-rich products and dixanthogen (Leppinen, 1990, Wang and Forssberg, 1991, López Valdivieso et al., 2005). The yield at pH 8 has been explained to be due to the formation of iron hydroxide-xanthate complexes on pyrite surface (Fornasiero and Ralston, 1992).

Zinc sulfate is a well-known selective depressant for zinc sulfide minerals such as sphalerite during the flotation of complex Cu–Pb–Zn sulfide ores. It deactivates sphalerite flotation by substituting the activating metal ions, and depresses sphalerite flotation by forming hydrophilic coatings of zinc hydroxyl species on sphalerite surfaces.

Pyrite is a major gangue mineral associated with galena and other valuable minerals, and it is necessary to selectively remove pyrite to upgrade the lead concentrate by froth flotation. In this study, the …

It is worth noting that thionocarbamate used for the flotation of copper-activated pyrite yields abysmal flotation performance and has thus been extensively used for the selective flotation of copper-bearing sulphide minerals from pyrite [16]. This study, therefore, seeks to address the following research questions: a.

Differential flotation. Sequential flotation. While all flotation processes are selective or differential in that one mineral or group of minerals is floated away from …

The selective collecting performance and differential adsorption mechanisms of DEOSA for both hematite and quartz were studied by flotation experiments and surface analysis. Flotation results suggested that DEOSA displayed excellent collecting capacity for quartz against hematite and the effective removal of quartz from hematite was achieved.

Microbially induced mineral beneficiation involves three strategies, namely, selective bioleaching of the undesirable mineral from an ore or concentrate, selective flotation …

The selective flotation of arsenopyrite from pyrite can be realized by adding a magnesium-ammonium mixture depressant [26]. As we all know, arsenic is a highly toxic substance that causes great ...

For the micro-flotation test of mixed minerals, the flotation was performed as the procedures mentioned above. The flotation products were assayed for Zn and Pb and the recovery was calculated. Each flotation test was performed at least three times, the mean vale was reported in this work. 2.3. Zeta potential measurement

Case study-1. For Copper and Lead flotation: We need to float both minerals 1st. We call it Bulk flotation. Then this bulk concentrate will go to Cleaning stage where we depress …

Differential flotation of the pyrite–arsenopyrite mixture was carried out by interacting 0.5 g each of the two different minerals, either together or separately, with cells and reagents. ... Selective flocculation studies were performed on 1:1 mineral mixtures as explained in Section 2.8. 50-ml sample of the mineral slurry containing 0.5 g of ...

Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces …

Specific interactions during adsorption of a surfactant on the mineral surface thus result in a shift of isoelectric point (IEP) of the system. Pradip has shown that this shift in IEP, (ΔpH = PZR – pzc) is related to the following … See more

Carboxymethyl Chitosan as a Selective Depressant in Differential Flotation of Galena and Chalcopyrite. Toxic inorganic depressants are routinely used in the differential flotation of polymetallic sulfide ores and it is desirable that they be replaced with environmentally benign chemicals. Chitosan, as a natural and non-toxic polymer, has …

Differential adsorption of surfactants (e.g., collectors and depressants) on the minerals plays a key role in mineral flotation through selectively altering the surface wettability of minerals.

Bulk flotation is where a group of floatable minerals are targets together for maximum recovery whereas selective (or differential) flotation they are targeted sequentially with one of the minerals being depressed while the other floated. Usually when they are floated sequentially grade is of a concern.

Generally, differential flotation of pyrite and arsenopyrite was defined by collector type, hydrogen peroxide addition, pulp pH, collector concentration and mineral surface oxidation species. Flotation of pyrite and arsenopyrite decreased with increase in pulp pH irrespective of the collector type used, owing to an increase in surface oxidation ...

The common method for bulk and differential flotation of copper, lead and zinc of these deposits is generally that sulfide minerals are first collected in a bulk process, and then separation is carried out to produce selective con-centrates as in the following steps [1]: First, the copper concentrate is separated; second, the lead concentrate is

Pyrite is a gangue mineral widely associated with valuable minerals. It is problematic to deal with in differential flotation because it easily reports to flotation concentrates. Pyrite may float due to natural or self-induced hydrophobicity or collector-induced hydrophobicity. Its flotation can also be enhanced by the activation of copper or lead ions emanating from …

DOI: 10.1016/J.MINPRO.2012.01.001 Corpus ID: 97341704; Using chitosan as a selective depressant in the differential flotation of Cu–Pb sulfides @article{Huang2012UsingCA, title={Using chitosan as a selective depressant in the differential flotation of Cu–Pb sulfides}, author={Peng Huang and Mingli Cao and Qi …