Selective collection and differential adsorption of pentaethoxylated
In this study, the collection capacity and separation performance of PEOLA were investigated and evaluated through flotation tests. Furthermore, the selective collection mechanisms of PEOLA toward both magnesite and quartz were revealed via surface detection experiments, involving Fourier transform infrared (FT-IR) spectroscopy, …
Reexamining the functions of zinc sulfate as a selective …
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.
Reexamining the functions of zinc sulfate as a selective …
Selective flotation of copper sulfides like chalcopyrite (CuFeS 2) from Cu-Zn mixed sulfide ores with high Cu/Zn ratios has proven difficult due to undesired activation of sphalerite (ZnS).Although the addition of excess zinc sulfate (ZnSO 4)—a sphalerite depressant—can achieve the selective flotation of chalcopyrite, the presence of pyrite …
Carboxymethyl Chitosan as a Selective... | ERA
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 …
The depression of pyrite in selective flotation by different reagent
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).
Flotation chemistry of scheelite and its practice: A …
The difference between the two models can be explained in terms of thermodynamics and dynamics. Lead ions do not exist in solution as ions ... (Foucaud et al., 2022), studied the synergistic effects between fatty acids and non-ionic reagents for the selective flotation of scheelite from tungsten ore, the results showed that the …
Fundamentals of froth flotation | ChemTexts
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 …
Flotation chemistry of scheelite and its practice: A …
In this paper, the progress and prospects of scheelite flotation chemistry and its practice are summarized, encompassing various fields — such as crystal chemistry, …
Bulk flotation vs. Selective flotation
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 …
Tannins: the organic depressants alternative in selective flotation …
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 ...
A Fundamental Study of Disodium Carboxymethyl
Huang P, Cao M, Liu Q (2012) Using chitosan as a selective depressant in the differential flotation of Cu–Pb sulfides. Int J Miner Process 106–109:8–15. Article Google Scholar Huang P, Cao M, Liu Q (2012) Adsorption of chitosan on chalcopyrite and galena from aqueous suspensions. Coll Surf Physicochem Eng Asp 409:167–175
Research Progress with Scheelite Flotation Reagents: A …
Flotation differences between the scheelite and calcium-bearing minerals can be explained by variations in the electrical charges and steric hindrance at the …
(PDF) Differential flotation of pyrite and arsenopyrite: …
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 ...
An Alternative Depressant of Chalcopyrite in Cu–Mo …
Differential Flotation and Its Interaction Mechanism Xuemin Qiu *, Hongying Yang *, Guobao Chen and Wenjie Luo School of Metallurgy, Northeastern University, Shenyang 110819, China; [email protected] (G.C.); ... been reported as candidate selective depressants in the recovery of valuable metals from bulk concentration [14,15]. These ...
Selective depression of sphalerite by chitosan in differential …
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 …
Carboxymethyl Chitosan as a Selective Depressant in Differential …
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 been proven to be an efficient depressant for copper sulfide (e.g., chalcopyrite) while allowing lead sulfide (e.g., galena) to be …
Selective collection and differential adsorption of …
Differential sorption behaviors of collectors at mineral/water interface play a crucial role in mineral flotation by selectively strengthening the hydrophobicity of the target minerals. To efficiently recover of magnesite from quartz, pentaethoxylated laurylamine (PEOLA) was introduced as a low-cost and high-selectivity collector to replace …
Differential adsorption of a high-performance collector
The selective collecting performance and differential adsorption mechanisms of DEOSA for both hematite and quartz were studied by flotation experiments and surface analysis.
Starch chemical modification for selective flotation of
Selective flotation in sulphide systems has been extensively investigated using native starch and dextrin as attractive and eco-friendly depressants. ... The coating affects whether and to what extent starch interacts with the mineral surface and affects the subsequent differential flotation behaviour. ... As explained earlier, ...
Differential adsorption of hydrolytic polymaleic anhydride …
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. In this study, to improve the removal efficiency of dolomite from apatite by direct flotation, hydrolytic polymaleic anhydride (HPMA) was introduced as ...
Selective depression of pyrite with chitosan in Pb–Fe sulfide flotation …
Flotation Behavior of Complex Sulfide Ores in the Presence of Biodegradable Polymeric Depressants. M. B. Hayat L. Alagha Syed Mohammad Sannan. Environmental Science, Chemistry. 2017. In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS2) …
Feasibility Study of Differential Flotation of Cu–Pb–Zn
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
Differential adsorption of a high-performance collector at …
@article{Yang2021DifferentialAO, title={Differential adsorption of a high-performance collector at solid–liquid interface for the selective flotation of hematite from quartz}, author={Bin Yang and Wan-zhong Yin and Jin Yao and Zhanglei Zhu and Haoran Sun and Keqiang Chen and Li-Ying Wang}, journal={Journal of Molecular Liquids}, …
A Century of Research Leading to Understanding …
One can selectively float any mineral from associated minerals in an ore provided an appropriate reagent is designed to make the given mineral surface, selectively and sufficiently hydrophobic so that it …
Selective separation of arsenopyrite from pyrite by …
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 ...
Minerals | Free Full-Text | Selective Flotation of Pyrite from …
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 flotation experiments of a single mineral and mixed minerals were performed using chitosan with different molecular weights (MW = 2−3, …
Selective collection and differential adsorption of …
@article{Yang2021SelectiveCA, title={Selective collection and differential adsorption of pentaethoxylated laurylamine for the flotation recovery of magnesite from quartz}, author={Bin Yang and Wan-zhong Yin and Jin Yao and Zhanglei Zhu and Huiming Sun and Keqiang Chen and Shaohang Cao}, journal={Colloids and Surfaces A: …
1 Froth Flotation – Fundamental Principles
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 in …
Fundamentals of froth flotation | ChemTexts
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 …
Carboxymethyl Chitosan as a Selective Depressant in …
Carboxymethyl Chitosan as a Selective Depressant in Differential Flotation of Galena and Chalcopyrite by ... but it was not the reason for N-CMC's selective depression of chalcopyrite. Mineral surface cleaning tests explained the good flotation result in the absence of any chelating reagents, such as EDTA, since N-CMC also possesses the ...