Flotation performances and adsorption mechanism of α-hydroxyoctyl phosphinic acid to cassiterite

Li, Fangxu; Zhong, Hong; Gang, Zhao; Wang, Shuai; Liu, Guangyi

doi:10.1016/j.apsusc.2015.06.147

Cited by 58 publications

(15 citation statements)

References 23 publications

(24 reference statements)

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“…When the pH value was 10.54, the recovery was only 14.29%. The results in Figure 4a are accordant with the data published in prior papers [23,35] and demonstrated the pH values had a great influence on the flotation behavior of cassiterite; the appropriate pH range for the flotation of cassiterite using SPA as a collector was 4.3-6.06. Flotation test results of the effects of the concentration of SPA on the recovery of cassiterite at pH 4.3 ± 0.1 are plotted in Figure 4b.…”

Section: Single Mineral Flotation Testssupporting

confidence: 89%

“…As shown in Figure 5a, the measured isoelectric point (IEP) of pure cassiterite surfaces was 3.8; this value was similar to the results reported in the literature [24,35]. Cassiterite surfaces were positively charged when pH < 3.8, and when the pH value exceeded 3.8, the surface charge values turned negative.…”

Section: Zeta Potential Measurements and Solution Chemistry Analysissupporting

confidence: 86%

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In Situ Investigation of the Adsorption of Styrene Phosphonic Acid on Cassiterite (110) Surface by Molecular Modeling

Gong¹,

Han²,

Liu³

et al. 2017

Minerals

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Abstract:The flotation, adsorption and bonding mechanisms of styrene phosphonic acid (SPA) to cassiterite were studied using microflotation tests, zeta potential measurements, solution chemistry analysis and density functional theory (DFT) calculations in this paper. Flotation results demonstrated SPA was an excellent collector for cassiterite which could recover over 85% cassiterite particles with the pH range 4.3-6.06 and 40 mg/L SPA. Zeta potential measurements and solution chemistry analysis revealed the adsorption of SPA was mainly contributed by the chemisorption of the monoanions on cassiterite surfaces. Frontier molecular orbital theory analysis and adsorption energy calculation results proved the monoanion of SPA was able to replace the OH − on cassiterite surfaces. The adsorption structure optimization results confirmed the binuclear complex was the most favorable adsorption configuration of SPA on cassiterite (110) surface. Mulliken population calculations and density of states analysis indicated during the bonding process the Sn3 atom lost electrons to O3 atom, and the bonding interaction between O3 and Sn3 atoms was mainly from the contribution of the 2p orbital of O3 atom and the 5s and 5p orbitals of Sn3 atom.

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Section: Single Mineral Flotation Testssupporting

confidence: 89%

Section: Zeta Potential Measurements and Solution Chemistry Analysissupporting

confidence: 86%

In Situ Investigation of the Adsorption of Styrene Phosphonic Acid on Cassiterite (110) Surface by Molecular Modeling

Gong¹,

Han²,

Liu³

et al. 2017

Minerals

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“…This phenomenon may be attributed to hydrated Al(OH) 4 − , which is the main species at pH 8.0. Figure 10a 2 displays that Sn3d XPS spectra of pure cassiterite are well fitted by two spin-orbit split peaks, with binding energies of 494.75 eV for the Sn3d3/2 level and 486.26 eV for the Sn3d5/2 level, respectively [36]. After Al (III) ions treatment, almost no changes are found in the binding energy of Sn3d spectra (Figure 10b 2 ).…”

mentioning

confidence: 96%

Effect of Al (III) Ions on the Separation of Cassiterite and Clinochlore Through Reverse Flotation

et al. 2018

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Most hydrophobic clay minerals, such as clinochlore, are known to cause problems in the recovery of cassiterite. In this study, a new reagent scheme, i.e., sodium oleate (NaOL) as a collector and Al (III) ions as a depressant, for reverse flotation separation of cassiterite and clinochlore was investigated. The flotation performance and interaction mechanism were studied by microflotation tests, adsorption tests, contact angle measurements, and X-ray photoelectron spectroscopy (XPS) analysis. Results of single mineral flotation experiments showed that NaOL had a different flotation performance on cassiterite and clinochlore, and the addition of Al (III) ions could selectively inhibit the floatability of cassiterite. Reverse flotation tests performed on mixed minerals indicated that the separation of cassiterite and clinochlore could be achieved in the presence of NaOL and Al (III) ions. Adsorption experiments demonstrated that Al (III) ions hindered the adsorption of NaOL on cassiterite surfaces but exerted little influence on the adsorption of NaOL on clinochlore surfaces. Results of contact angle measurements indicated that Al (III) ions could impede the hydrophobization process of cassiterite in NaOL solution. XPS results showed that aluminum species were adsorbed onto the cassiterite surfaces through the interaction with O sites.

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“…Also, FTIR indicated a new peak at 1180 cm −1 after bastnäsite treatment which could be attributed to the stretching vibration of surface group P-oxygen [73,78,79]. The presence of surface P groups was also demonstrated through XPS whereby IL interactions onto bastnäsite surface were objectified [64,73,76,80]. Consequently, the uptake of IL anionic moiety took place via chemisorption [11,60,81] through a covalent bond between P-oxygen group and active centers on the mineral surface [64,73,76,80] as exemplified in Fig.…”

Section: Il Collector Conformation On Bastnäsite and Monazite Surfacesmentioning

confidence: 95%

“…The modest vibrational features around 1380 cm −1 and 1462 cm −1 as highlighted on the FTIR spectra of the IL-treated bastnäsite and monazite were attributed to bending vibrations of the same groups [72]. Moreover, the band protruding at 1180-1181 cm −1 for the treated bastnäsite and monazite was assigned to P = O stretching of the phosphate functional group [64,73] of the IL anionic moiety. This functional group man- ifests as an active center for adsorptive interactions with both mineral surfaces.…”

Section: Infrared Spectroscopymentioning

confidence: 98%

Ionic-liquid collectors for rare-earth minerals flotation⿿Case of tetrabutylammonium bis(2-ethylhexyl)-phosphate for monazite and bastnäsite recovery

Azizi

Larachi

Latifi

2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Flotation performances and adsorption mechanism of α-hydroxyoctyl phosphinic acid to cassiterite

Cited by 58 publications

References 23 publications

In Situ Investigation of the Adsorption of Styrene Phosphonic Acid on Cassiterite (110) Surface by Molecular Modeling

In Situ Investigation of the Adsorption of Styrene Phosphonic Acid on Cassiterite (110) Surface by Molecular Modeling

Effect of Al (III) Ions on the Separation of Cassiterite and Clinochlore Through Reverse Flotation

Ionic-liquid collectors for rare-earth minerals flotation⿿Case of tetrabutylammonium bis(2-ethylhexyl)-phosphate for monazite and bastnäsite recovery

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