Flotation Behavior of Different Colored Fluorites Using Sodium Oleate as a Collector

Zheng, Renji; Ren, Zijie; Gao, Huimin; Qian, Yupeng

doi:10.3390/min7090159

Cited by 18 publications

(7 citation statements)

References 26 publications

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“…The results are shown in Figure 6. For all collectors, the adsorption band around 2957 cm −1 was related to the asymmetric stretching vibration of −CH3 in alkyl chains, and the peaks around 2920 cm −1 and 2850 cm −1 were attributed to −CH2 asymmetric and symmetric stretching frequencies [3,22]. A strong band at about 1468 cm −1 existing in C10, C12, and C16 was attributed to the deformation vibration of −CH2, associated with wagging of −(CH2)n at 720 cm −1 [9].…”

Section: Ir Spectroscopic Analysis Resultsmentioning

confidence: 97%

“…Fluorite (CaF 2 ), an important nonrenewable mineral that is primarily used for the manufacture of hydrofluoric acid, glass, cement, fillers, and as a flux regent in steel making, has in recent years been considered an important strategic mineral [1][2][3][4]. In natural ore deposits, fluorite is mostly associated with other calcium-bearing minerals, such as calcite and scheelite.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Sulfonate-Based Collectors with Different Hydrophobic Tails for Flotation of Fluorite

et al. 2018

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This investigation aims to demonstrate the effects of hydrophobic tails on the affinity and relevant flotation response of sulfonate-based collectors for fluorite. For this purpose, a series of alkyl sulfonates with different hydrophobic tails, namely sodium decanesulfonate (C10), sodium dodecylsulfate (C12), sodium hexadecanesulfonate (C16), and sodium dodecylbenzenesulfonate (C12B) were applied. The flotation tests showed that C12 and C12B had a better collecting performance than C10 and C16 at pH < 10, and the flotation recovery of fluorite was higher when adopting C12B as a collector compared with C12 with a strong base. The adsorption behaviors of collectors on the fluorite surface were studied through zeta potential, Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS) analyses. It was found that the affinity of alkyl sulfonates for fluorite was enhanced with the increase of the alkyl chain length from C10 to C16. The existence of phenyl in the hydrophobic tail of sulfonates could improve its activity for fluorite by reducing its surface tension. The abnormal phenomenon C16 with a high affinity for fluorite had a low collecting performance for fluorite mainly due to its overlong alkyl chain, resulting in low solubility in pulp, which restrained its interaction with fluorite. We concluded that C12B was the most applicable collector for fluorite among these reagents due to its high activity, high solubility, and low cost, which was further substantiated by calculating their molecular frontier orbital energy.

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Section: Ir Spectroscopic Analysis Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Evaluation of Sulfonate-Based Collectors with Different Hydrophobic Tails for Flotation of Fluorite

et al. 2018

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“…Furthermore, the subsequent addition of the collector NaOL shifts the zeta potential of the "calcite + HEDP" surface to a more negative value by 17.6 mV, which is more than twice the decline by 8.3 mV for the zeta potential of the "fluorite + HEDP" surface, implying that NaOL can be more favorably chemisorb on (HEDP pre-adsorbed) calcite surfaces [24,35]. This effect might be attributed to the strong pre-adsorption of HEDP on fluorite, which can prevent the subsequent adsorption of NaOL.…”

Section: Zeta Potential Measurement Resultsmentioning

confidence: 99%

Reverse Flotation Separation of Fluorite from Calcite: A Novel Reagent Scheme

et al. 2018

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Fluorite (CaF2), as an important strategic mineral source, is usually separated from calcite by the common froth flotation method, but this separation is still not selective enough. The development of a selective collector and/or depressant is the key to achieving high selective separation. 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP or H4L) is widely used as an environmentally friendly water treatment reagent due to its low cost and excellent anti-scaling performance in an aqueous solution. In this study, a novel reagent scheme was developed using HEDP as a fluorite depressant and sodium oleate (NaOL) as a calcite collector for the first time. When 3 × 10−5 mol/L of HEDP and 6 × 10−5 mol/L of NaOL were used at pH 6, the optimal selective separation for single minerals and mixed binary minerals was obtained. Zeta potential measurements indicated that HEDP possessed a stronger adsorption on fluorite than calcite, while NaOL did the opposite. This novel reagent scheme is of low cost, uses a small dosage, and is friendly to the environment, which makes it a promising reagent scheme for fluorite flotation in industrial application.

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“…The adsorption capacities of the minerals under different static interaction times were calculated according to the following Equation (1) [14]:…”

Section: Collector Adsorption Measurementsmentioning

confidence: 99%

The Contribution of Long-Terms Static Interactions Between Minerals and Flotation Reagents for the Separation of Fluorite and Calcite

Huang

Zeng

et al. 2019

Minerals

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The influences of long-term static interaction between flotation reagents and minerals on mineral surface properties and their flotation behaviors were investigated in this work. Single mineral results showed that when the static interaction time between flotation reagents and minerals increased from 0 to 8 days, there were no significant differences in the recovery of fluorite (ranging from 77.50% to 74.50%), while the recovery of calcite dramatically decreased from 97.17% to 41.13%. The collector adsorption results indicated that after the long-term static interaction between the collector and minerals, adsorption and desorption of collector on the minerals occurred, and the adsorption amount of collector on fluorite and calcite varied from 0.396 mg/g to 0.421 mg/g, and from 0.444 mg/g to 0.404 mg/g, respectively. The contact angles of fluorite and calcite decreased from 134.3° and 105.0° for 0 days to 109.7° and 52.5° for 8 days, respectively, which demonstrated that the fluorite had a higher hydrophobicity than that of calcite after 8 days of static interaction between the minerals and collector. The Fourier transform infrared spectroscopy (FTIR) analysis showed that there were chemisorptions between the collector and the surfaces of the fluorite and calcite. Meanwhile, the X-ray photoelectron spectroscopy (XPS) results further elucidated that the amount of C=O from the oleic acid (OA) molecule for calcite treated for 8 days was less than for that treated for 0 days. In addition, the flotation results of the tailings from Jiangxi containing fluorite and calcite, indicated that the grade and recovery of fluorite increased from 87.18% and 40.99% for 0 days to 93.00% and 46.01% for 8 days, respectively, indicating that the separation of fluorite from calcite could be achieved via increasing the long-term static interaction between the flotation reagents and minerals.

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Flotation Behavior of Different Colored Fluorites Using Sodium Oleate as a Collector

Cited by 18 publications

References 26 publications

Evaluation of Sulfonate-Based Collectors with Different Hydrophobic Tails for Flotation of Fluorite

Evaluation of Sulfonate-Based Collectors with Different Hydrophobic Tails for Flotation of Fluorite

Reverse Flotation Separation of Fluorite from Calcite: A Novel Reagent Scheme

The Contribution of Long-Terms Static Interactions Between Minerals and Flotation Reagents for the Separation of Fluorite and Calcite

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