Adsorption mechanism of mixed cationic/anionic collectors in feldspar-quartz flotation system

Vidyadhar, A; Rao, K. Hanumantha

doi:10.1016/j.jcis.2006.10.047

Cited by 150 publications

(48 citation statements)

References 12 publications

(11 reference statements)

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“…Figure 8 shows the zeta potential of quartz as a function of pH in the absence and presence of calcium ions. The IEP of quartz in distilled water was observed around pH = 2, which was in good agreement with results reported by other researchers [33][34][35]. It can be seen that the IEP values did not change with the increase of calcium ion concentration, but the quartz surface was less negatively charged in the presence of Ca 2+ above pH 3.4.…”

Section: Zeta Potentials Of Pure Minerals In the Presence Of Calcium supporting

confidence: 91%

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

et al. 2018

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Abstract:The effects of Ca 2+ , Mg 2+ , Al 3+ , and Fe 3+ on the flotation behaviors of apatite, dolomite and quartz were investigated through a micro-flotation test, and the influence of calcium ions on the flotation of these minerals was further elucidated by solution chemistry study, zeta potential measurement, and X-ray photoelectron spectroscopy (XPS) analyses. The results indicate that an appropriate amount of Ca 2+ and Mg 2+ can improve the floatability of apatite but had a negligible effect on the flotation performance of dolomite, whereas Al 3+ , Fe 3+ , and excessive amounts of Ca 2+ decreased the recovery of apatite and dolomite. The studied metal cations can activate quartz at a particular pH. It can be inferred from solution chemistry and zeta potential measurement that the influence of metal ions on the flotation of different minerals should be attributed to the adsorption of various hydrolysis species on the mineral surfaces. XPS analyses reveal that calcium ions can enhance the adsorption of anionic collector on apatite and quartz surfaces, and there are no apparent changes to be observed on the surface of dolomite in the absence and presence of calcium ions at a concentration of 2.5 × 10 −3 M, which was in good agreement with the micro-flotation results.

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Section: Zeta Potentials Of Pure Minerals In the Presence Of Calcium supporting

confidence: 91%

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

et al. 2018

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“…Furthermore, physical processing and chemical leaching are common processing technologies used in industry. Magnetic separation is mainly used for removing iron-bearing magnetic minerals, while flotation is mainly used for removing aluminum-bearing silicate minerals from quartz ore [15]. However, a common weakness of both processes is that they can only remove specific kinds of impurity minerals.…”

Section: Introductionmentioning

confidence: 99%

Mineralogy and Processing of Hydrothermal Vein Quartz from Hengche, Hubei Province (China)

2017

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Quartz occurs in many geological materials, and is used in numerous industrial fields as a raw material. Mineralogy and the processing of hydrothermal quartz were studied by optical microscope, electron probe microanalysis, scanning electron microscope, inductively coupled plasma-optical emission spectrometry, and inductively coupled plasma mass spectrometer. A combination of the geological occurrence of the quartz deposit, mineralogical studies, and the processing technologies of the hydrothermal quartz was accomplished. The results show that impurities within the quartz mainly include muscovite, hematite, apatite, and secondary fluid inclusions. The main chemical impurities are Al (353 µg·g −1 ), K (118 µg·g −1 ), Fe (61.2 µg·g −1 ), P (15.5 µg·g −1 ), Na (13.4 µg·g −1 ), Mg (11.8 µg·g −1 ), Ti (8.31 µg·g −1 ), and B (10.8 µg·g −1 ). Based on these results, a combined process consisting of calcination and fluoride-free pressure acid leaching was established to effectively decompose and dissolve the quartz, and remove gangue minerals and fluid inclusions. The calcination process not only removed volatile components; it also destroyed the crystal structure of gangue minerals and enhanced their release probabilities. The calcination process has a positive influence on the removal of impurity elements by the fluoride-free pressure acid leaching process. A total of 85.2 wt % and 84.0 wt % of impurity elements was removed using the leaching systems of HCl-NH 4 Cl and H 2 SO 4 -NH 4 Cl, respectively.

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“…These colored impurities are found as iron-bearing silicate minerals, which can be removed by sulfonate type collectors at acidic pH values (3)(4). However, based on their similar crystalline structures and physicochemical properties, flotation becomes the only option for separating, in particular, quartz and feldspar [4,[6][7][8][9][10][11]. Apart from other flotation-related parameters such as reagent type or electrolyte concentration, material-based characteristics also play an important role in selecting the pH range, collector and frother dosage, among other parameters.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to its low solubility, the usage of HF causes environmental and health problems. For that reason, research has leaned toward new schemes without the usage of HF for feldspar/quartz separation [10,[13][14][15]. Besides other types of collectors such as anionic, cationic or non-ionic collectors, the efficiency of mixed systems such as tallow propylene di-amine-dioleate (Duomeen T series), polyethylene glycol hexadecyl ether, and sodium dodecyl sulfate (Brij 58 + SDS) was found to be higher compared to single systems [13,14,16].…”

Section: Introductionmentioning

confidence: 99%

An Alternative Source for Ceramics and Glass Raw Materials: Augen-Gneiss

et al. 2017

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Due to the depletion of well-known feldspar reserves in the forms of granite, trachyte and pegmatite, many investigations are focused on new and economic alternatives to these resources. Of these, gneiss is a metamorphic rock type, which is characterized by dark and light colored minerals including feldspar and quartz. In this study, Augen-Gneiss rock was subjected to flotation tests to produce alkali (Na + Ca) feldspar and quartz concentrates by adapting different flotation conditions with/without hydrofluoric acid (HF). During these tests, the effect of particle size and different reagent combinations were investigated. The results of these tests showed that, in the presence of HF, a saleable feldspar concentrate with 0.04% Fe 2 O 3 content and a saleable quartz concentrate with 98.45% SiO 2 content were obtained. Products with similar qualities to a feldspar concentrate with 0.13% Fe 2 O 3 and a quartz concentrate with 92.53% SiO 2 content were produced without HF. The results of these tests clearly showed that, compared to other types of origin, saleable quality feldspar and quartz could well be enriched with/without HF from Augen-Gneiss rock.

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Adsorption mechanism of mixed cationic/anionic collectors in feldspar-quartz flotation system

Cited by 150 publications

References 12 publications

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

Mineralogy and Processing of Hydrothermal Vein Quartz from Hengche, Hubei Province (China)

An Alternative Source for Ceramics and Glass Raw Materials: Augen-Gneiss

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