The role of surface roughness in the wettability and floatability of quartz particles

Zhu, Zhanglei; Yin, Wanzhong; Wang, Donghui; Sun, Haoran; Chen, Keqiang; Yang, Bin

doi:10.1016/j.apsusc.2020.146799

Cited by 61 publications

(13 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The highest S.E can be observed when starch and PGA were 50 and 300 g/t, respectively. The observed improvements in flotation separation corroborate findings reported elsewhere on the beneficial effects of a narrow particle size distribution 27 , 28 and surface roughness 39 , 40 . Besides the superior properties observed from using PGA, surface analyses were considered to assess PGA interaction with mineral surfaces.…”

Section: Resultssupporting

confidence: 89%

Beneficial effects of a polysaccharide-based grinding aid on magnetite flotation: a green approach

Chipakwe

Karlkvist

Rosenkranz

et al. 2022

Sci Rep

View full text Add to dashboard Cite

Grinding is the most energy-intensive step in mineral beneficiation processes. The use of grinding aids (GAs) could be an innovative solution to reduce the high energy consumption associated with size reduction. Surprisingly, little is known about the effects of GAs on downstream mineral beneficiation processes, such as flotation separation. The use of ecofriendly GAs such as polysaccharide-based materials would help multiply the reduction of environmental issues in mineral processing plants. As a practical approach, this work explored the effects of a novel polysaccharide-based grinding aid (PGA) on magnetite's grinding and its reverse flotation. Batch grinding tests indicated that PGA improved grinding performance by reducing energy consumption, narrowing particle size distribution of products, and increasing their surface area compared to grinding without PGA. Flotation tests on pure samples illustrated that PGA has beneficial effects on magnetite depression (with negligible effect on quartz floatability) through reverse flotation separation. Flotation of the artificial mixture ground sample in the presence of PGA confirmed the benefits, giving a maximum Fe recovery and grade of 84.4 and 62.5%, respectively. In the absence of starch (depressant), PGA resulted in a separation efficiency of 56.1% compared to 43.7% without PGA. The PGA adsorption mechanism was mainly via physical interaction based on UV–vis spectra, zeta potential tests, Fourier transform infrared spectroscopy (FT-IR), and stability analyses. In general, the feasibility of using PGA, a natural green polymer, was beneficial for both grinding and reverse flotation separation performance.

show abstract

Section: Resultssupporting

confidence: 89%

Beneficial effects of a polysaccharide-based grinding aid on magnetite flotation: a green approach

Chipakwe

Karlkvist

Rosenkranz

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…In contrast, Gungoren et al [13] addressed an enhancement in quartz recovery at a low-power level (30 W) because of an increase in its contact angle (from 52 • to 62 • in the presence of 10 −3 M DAH) and slight change of its surface roughness (from 3.70 to 4.24 µm). In this context, Zhu et al [69] pointed out some inconsistencies of wettability and floatability of quartz in the literature focusing on its roughness property. We believe that surface chemistry aspect of ultrasonication in previously reported works is notably overlooked and further observations consisting surface topography measurements and heterogeneity considering possible chemical and electrochemical reactions on quartz surface can help to clarify these contradictions.…”

Section: Ultrasonic Treatmentsmentioning

confidence: 99%

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

et al. 2021

View full text Add to dashboard Cite

Numerous studies have addressed the role of ultrasonication on floatability of minerals macroscopically. However, the impact of acoustic waves on the mineral hydrophobicity and its physicochemical aspects were entirely overlooked in the literature. This paper mainly investigates the impact of ultrasonic power and its time on the wettability and floatability of chalcopyrite, pyrite and quartz. For this purpose, contact angle and collectorless microflotation tests were implemented on the ultrasonic-pretreated and non-treated chalcopyrite, pyrite and quartz minerals. The ultrasonic process was carried out by a probe-type ultrasound (Sonopuls, 20 kHz and 60 W) at various ultrasonication time (0.5–30 min) and power (0–180 W) while the dissolved oxygen (DO), liquid temperature, conductivity (CD) and pH were continuously monitored. Comparative assessment of wettabilities in the presence of a constant low-powered (60 W) acoustic pre-treatment uncovered that surface of all three minerals became relatively hydrophilic. Meanwhile, increasing sonication intensity enhanced their hydrophilicities to some extent except for quartz at the highest power-level. This was mainly related to generation of hydroxyl radicals, iron-deficient chalcopyrite and elemental sulfur (for chalcopyrite), formation of OH and H radicals together with H2O2 (for pyrite) and creation of SiOH (silanol) groups and hydrogen bond with water dipoles (for quartz). Finally, it was also found that increasing sonication time led to enhancement of liquid temperature and conductivity but diminished pH and degree of dissolved oxygen, which indirectly influenced the mineral wettabilities and floatabilities. Although quartz and pyrite ultrasound-treated micro-flotation recoveries were lower than that of conventional ones, an optimum power-level of 60–90 W was identified for maximizing chalcopyrite recovery.

show abstract

“…XPS spectra were obtained using an Axis Ultra DLD Kratos AXIS SUPRA spectrometer. The binding energy scale was corrected using a C1s peak at approximately 284.80 eV as the internal binding energy standard [26,27]. A 2 g sample was added to 20 mL of distilled water and centrifuged at 2000 rpm, and the pulp was adjusted based on the flotation process.…”

Section: Xps Measurementmentioning

confidence: 99%

Elimination of Ferric Ion Effect on Separation between Kyanite and Quartz Using Citric Acid as Regulator

Li¹,

Sun

et al. 2021

Minerals

Self Cite

View full text Add to dashboard Cite

Ferric ions produced during grinding influence the flotation separation between kyanite and quartz adversely. In this study, citric acid was used as a regulator to eliminate the effect of ferric ions on the separation of kyanite from quartz with sodium oleate (NaOL) as a collector. The microflotation test results indicated that the quartz was selectively activated by FeCl3 and maintained significant quartz recovery. However, the citric acid could selectively eliminate the effect of ferric ions on the quartz and minimally influenced the kyanite. Contact angle tests demonstrated that FeCl3 significantly increased the interaction between NaOL and quartz, resulting in the high hydrophobicity of quartz, and the addition of citric acid made the quartz surface hydrophilic again but slightly influenced the kyanite. Fourier-transform infrared spectroscopy showed that FeCl3 facilitated NaOL adsorption onto the quartz surface, and the addition of citric acid eliminated the activation of FeCl3 on the quartz, resulting in the nonadsorption of NaOL onto the quartz surface. However, the FeCl3 and citric acid exhibited a negligible effect on NaOL adsorption onto the kyanite surface. X-ray photoelectron spectroscopy analysis indicated that the citric acid eliminated FeCl3 activation on the quartz.

show abstract

The role of surface roughness in the wettability and floatability of quartz particles

Cited by 61 publications

References 24 publications

Beneficial effects of a polysaccharide-based grinding aid on magnetite flotation: a green approach

Beneficial effects of a polysaccharide-based grinding aid on magnetite flotation: a green approach

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

Elimination of Ferric Ion Effect on Separation between Kyanite and Quartz Using Citric Acid as Regulator

Contact Info

Product

Resources

About