On the natural floatability of sulfides

Fuerstenau, M. C.; Sabacky, B. J.

doi:10.1016/0301-7516(81)90008-9

Cited by 74 publications

(24 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For both our experimental and simulated contact angles, the values for the fresh sphalerite ZnS crystal surface were very close to values reported the literature (Jin et al, 2014). The relatively small contact angle for the sphalerite-ZnS (110) surface indicated its modest hydrophobic character, which also has been revealed by the incomplete flotation of sphalerite in the absence of collectors (Fornasiero and Ralston, 2006;Fuerstenau and Sabacky, 1981).…”

Section: Simulated and Experimental Contact Anglessupporting

confidence: 87%

“…This possible copper-zinc sulfide product formed during the Cu 2+ activation of the sphalerite surface was more hydrophobic than the fresh sphalerite surface. Our simulated and experimental contact angle measurements suggest that the more hydrophobic state of the possible copper-zinc sulfide and/or copper sulfide product at the surface of the Cu 2+ activated sphalerite accounts for the complete floatability of Cu 2+ activated sphalerite as revealed by the previous collectorless flotation studies (Fornasiero and Ralston, 2006;Fuerstenau and Sabacky, 1981).…”

Section: Simulated and Experimental Contact Anglessupporting

confidence: 58%

“…In the virtual absence of oxygen (i.e., in water containing less than 5 ppb oxygen), pyrite, chalcopyrite and galena can be completely floated, while sphalerite shows a relatively weak floatability under such conditions, indicating only a modest level of hydrophobicity (Fuerstenau and Sabacky, 1981). The relatively weak floatability of sphalerite in the absence of collectors has been confirmed by other researchers (Fornasiero and Ralston, 2006).…”

Section: Introductionsupporting

confidence: 56%

“…Though the fresh sphalerite is not floated completely in the absence of collector, the Cu 2+ activated sphalerite has a strong floatability under the same conditions (Fornasiero and Ralston, 2006;Fuerstenau and Sabacky, 1981). These results indicate that the hydrophobic character of the sphalerite surface increases significantly after Cu 2+ activation.…”

Section: Introductionmentioning

confidence: 87%

See 3 more Smart Citations

Effect of Cu2+ activation on interfacial water structure at the sphalerite surface as studied by molecular dynamics simulation

Jin

Miller

Dang

et al. 2015

International Journal of Mineral Processing

View full text Add to dashboard Cite

Keywords:MDS DFT Contact angle Interfacial water structure In the first part of this paper, an experimental contact angle study of fresh and Cu 2+ activated sphalerite-ZnS surfaces as well as the covellite-CuS (001) surface is reported describing the increased hydrophobic character of the surface during Cu 2+ activation. In addition to these experimental results, fresh sphalerite-ZnS (110), copper-zinc sulfide-CuZnS 2 (110), villamaninite-CuS 2 (100), and covellite-CuS (001) surfaces were examined using Molecular Dynamics Simulation (MDS). Our MDS results on the behavior of interfacial water at the fresh sphalerite-ZnS (110), copper-zinc sulfide-CuZnS 2 (110), villamaninite-CuS 2 (100), and covellite-CuS (001) surfaces include simulated contact angles, water number density distribution, water dipole orientation, water residence time, and hydrogen-bonding considerations. The copper content at the Cu 2+ activated sphalerite surface seems to account for the increased hydrophobicity as revealed by both experimental and MD simulated contact angle measurements. The relatively greater hydrophobic character developed at the Cu 2+ activated sphalerite surface and at the copper sulfide surfaces has been described by MDS, based on the structure of interfacial water and its dynamic properties.

show abstract

Section: Simulated and Experimental Contact Anglessupporting

confidence: 87%

Section: Simulated and Experimental Contact Anglessupporting

confidence: 58%

Section: Introductionsupporting

confidence: 56%

Section: Introductionmentioning

confidence: 87%

See 2 more Smart Citations

Effect of Cu2+ activation on interfacial water structure at the sphalerite surface as studied by molecular dynamics simulation

Jin

Miller

Dang

et al. 2015

International Journal of Mineral Processing

View full text Add to dashboard Cite

show abstract

“…Therefore, pyrite can be floated without collector under some conditions if enough hydrophobic oxidation species are formed on the surface. For example, Fuerstenau and Sabacky (1981) reported that pyrite single mineral was almost completely floatable without collector in water containing less than 5 ppb of oxygen at near neutral pH. Although some other laboratory studies could also manage to get a high pyrite recovery without any collector by controlling the solution chemistry (Ekmekçi andDemirel 1997, Hu et al 2009), this self-induced flotation of pyrite is weak under the normal plant conditions (Zheng and Manton 2010).…”

Section: Pyrite Oxidation and Flotationmentioning

confidence: 99%

The effect of regrinding chemistry and particle breakage mechanisms on subsequent cleaner flotation

Chen¹

View full text Add to dashboard Cite

Regrinding rougher flotation concentrates is typically used to liberate valuable minerals from gangue prior to the cleaner separation stage in processing of low grade ores. Compared to the rougher flotation after primary grinding, it is usually more challenging to achieve a satisfactory performance in post-regrind cleaner flotation especially when fine particles are generated. One main factor which results in this reduction in flotation is the unsuitable particle surfaces produced after regrinding. However, this factor is not usually considered when designing and optimizing the regrinding process.Extensive studies have demonstrated that grinding chemistry can influence mineral floatability.However, earlier studies focused on primary grinding and rougher flotation rather than regrinding and cleaner flotation. In addition, different types of regrind mills are used in industry, and these provide different particle breakage mechanisms which may also influence mineral floatability.Therefore, the overall objective of this thesis study is to investigate the effects of regrinding chemistry and particle breakage mechanisms on the cleaner flotation. The implementation of regrinding in the copper and pyrite flotation circuits at Telfer gold mine was taken as a case study and four research areas were addressed with the objective of developing fundamental understanding to provide practical guidance for the plant operation. The four areas investigated are:1. Effect of regrinding chemistry on copper activation of pyrite and its flotation; 2. Separation of different copper sulphide minerals from pyrite after regrinding; 3. Importance of pulp chemistry during regrinding rougher concentrates; 4. Effect of particle breakage mechanisms on subsequent flotation.In this study, it was found that copper activation of pyrite and its flotation in the cleaner stage were affected by regrinding. In general, a decrease in surface concentration of collectors due to the increased surface area after regrinding contributed to the low pyrite recovery in the cleaner. Surface analysis revealed that both the surfaces that were carried from the rougher flotation concentrate and those which were freshly created were modified by the strong electrochemical reactions occurring inside the regrind mill. Stainless steel media promoted pyrite oxidation, especially on the copper activated surfaces. Mild steel media produced a greater amount of iron oxidation species which could adsorb on the carried surfaces. It was also found that mild steel media generated a reducing condition which favoured the copper activation on the freshly created surfaces.ii The research has also shown that the separability of chalcopyrite and chalcocite from pyrite was significantly different after regrinding, which was related to their electrochemical properties.Chalcocite was more active and therefore presented a stronger galvanic interaction with pyrite.Consequently chalcocite was more oxidised, which not only depressed its flotation but also produced sufficient copper ions...

show abstract

Study of the Collectorless Flotation Behavior of Galena in the Presence of Ferric Ion

Pérez

Martínez

Palacios

et al. 2022

Characterization of Minerals, Metals, and Materials 2022

View full text Add to dashboard Cite

On the natural floatability of sulfides

Cited by 74 publications

References 3 publications

Effect of Cu2+ activation on interfacial water structure at the sphalerite surface as studied by molecular dynamics simulation

Effect of Cu2+ activation on interfacial water structure at the sphalerite surface as studied by molecular dynamics simulation

The effect of regrinding chemistry and particle breakage mechanisms on subsequent cleaner flotation

Study of the Collectorless Flotation Behavior of Galena in the Presence of Ferric Ion

Contact Info

Product

Resources

About