Anisotropic crystal plane nature and wettability of fluorapatite

Xie, Jun; Zhang, Qin; Mao, Song; Li, Xianhai; Zhang, Shen; Li, Longjiang

doi:10.1016/j.apsusc.2019.06.195

Cited by 22 publications

(10 citation statements)

References 50 publications

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“…6. Similar to prior reports, the natural quartz displayed strong hydrophilicity, as indicated by its small contact angle of 24°±1° [37][38]. Moreover, after conditioning with the collectors, the contact angles of quartz sharply increased to 53°±3° for DTAB and 56°±3° for DAC.…”

Section: Wettability Analysissupporting

confidence: 87%

Utilization of DTAB as a collector for the reverse flotation separation of quartz from fluorapatite

Liu

Huang

Rao

et al. 2021

Int J Miner Metall Mater

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Reverse flotation desilication is an indispensable step for obtaining high-grade fluorapatite. In this work, dodecyltrimethylammonium bromide (DTAB) is recommended as an efficient collector for the reverse flotation separation of quartz from fluorapatite. Its collectivity for quartz and selectivity for fluorapatite were also compared with figures corresponding to the conventional collector dodecylamine hydrochloride (DAC) via microflotation experiments. The adsorption behaviors of DTAB and DAC on minerals were systematically investigated with surface chemical analyses, such as contact angle determination, zeta potential detection, and adsorption density measurement. The results revealed that compared to DAC, DTAB displayed a similar and strong collectivity for quartz, and it showed a better selectivity (or worse collectivity) for fluorapatite, resulting in a high-efficiency separation of the two minerals. The surface chemical analysis results showed that the adsorption ability of DTAB on the quartz surface was as strong as that of DAC, whereas the adsorption amount of DTAB on the fluorapatite surface was much lower than that of DAC, which is associated with the flotation performance. During the floatation separation of the actual ore, 8wt% fluorapatite with a higher grade can be obtained using DTAB in contrast to DAC. Therefore, DTAB is a promising collector for the high-efficiency purification and sustainable utilization of valuable fluorapatite recourses.

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Section: Wettability Analysissupporting

confidence: 87%

Utilization of DTAB as a collector for the reverse flotation separation of quartz from fluorapatite

Liu

Huang

Rao

et al. 2021

Int J Miner Metall Mater

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“…Flotation is a beneficiation technique involving middle–low‐grade phosphate ore, 4 which relies on the nature of mineral crystal structural differences to enhance the discrepancy in surface wettability between useful minerals and vein minerals using flotation agents, resulting in effective mineral separation 5 . The flotation for phosphate ore has been a focus of attention 6 .…”

Section: Introductionmentioning

confidence: 99%

“…Flotation is a beneficiation technique involving middle-low-grade phosphate ore, 4 which relies on the nature of mineral crystal structural differences to enhance the discrepancy in surface wettability between useful minerals and vein minerals using flotation agents, resulting in effective mineral separation. 5 The flotation for phosphate ore has been a focus of attention. 6 Because of the similar hydrophilic nature of the surfaces of apatite and carbonate minerals, 7 significant amounts of calcium metal ions are dissolved in water, 8 while metal active sites of homoplastic nature are exposed.…”

Section: Introductionmentioning

confidence: 99%

The flotation separation of apatite from dolomite using a fatty acid‐based collector and the mechanisms of adsorption

Kang

Zhang

2022

Surface & Interface Analysis

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In this work, GJBW, a fatty acid‐based agent, was used as an efficient collector to separate dolomite from apatite to achieve high‐purity apatite. The flotation performance of dolomite and apatite in the phosphate (H3PO4) system treated with sodium oleate (NaOl) and GJBW, respectively, was studied and compared. Microheat tests, surface characterization, and flotation solution chemistry calculations were used to evaluate the adsorption mechanism of GJBW onto dolomite. The smoothness and flatness of dolomite treated and untreated with GJBW may be also detected via atomic force microscopy (AFM). Microflotation results illustrated that GJBW performed better than NaOl for separating apatite from dolomite under the H3PO4 system. The grade of P2O5 in concentrates treated with 10 mg/L GJBW was 31.49%, which was 4.98% higher than that of NaOl. The recovery rate of P2O5 was 87.05%, which was 4.71% higher than that of NaOl. Microheat tests demonstrated that GJBW generated a higher heat of adsorption onto dolomite than did the same concentration of NaOl, significantly enhancing the dolomite's hydrophobicity. Fourier transform infrared spectroscopy (FTIR), zeta potential, flotation solution chemistry calculations, and surface characterization further demonstrated that GJBW may ionize large amounts of RCOO− and H (RCOO)2− ions in solution, which can be significantly chemisorbed with numerous sites of Ca and Mg exposed to dolomite, forming dense point‐like adsorption onto dolomite. These findings shed more light on the mechanism of interaction between GJBW and dolomite, which has profound implications for the study and use of fatty acid‐based treatments in phosphate ores.

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“…Ideal fluorapatite crystals have a hexagonal prism structure containing 42 atoms per primitive cell with a space group of P6 3 /m and common crystal surfaces of ( 100) and ( 101) (Pasero et al, 2010;Xie et al, 2019). However, depending on physical and/or chemical conditions during and/or after the formation, apatite crystals show different shapes, such as rods (Castro et al, 2013;Iijima and Moradian-oldak, 2005), needles (Li et al, 2007;Yubao et al, 1994), spheres (Smičiklas et al, 2000), and fibers (Aizawa et al, 2005).…”

Section: Sample Characterizationmentioning

confidence: 99%

Enhanced leaching recovery of rare earth elements from a phosphatic waste clay through calcination pretreatment

Li²,

Huang³

et al. 2021

Journal of Cleaner Production

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Anisotropic crystal plane nature and wettability of fluorapatite

Cited by 22 publications

References 50 publications

Utilization of DTAB as a collector for the reverse flotation separation of quartz from fluorapatite

Utilization of DTAB as a collector for the reverse flotation separation of quartz from fluorapatite

The flotation separation of apatite from dolomite using a fatty acid‐based collector and the mechanisms of adsorption

Enhanced leaching recovery of rare earth elements from a phosphatic waste clay through calcination pretreatment

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