Flotation separation of bastnaesite from fluorite with an eco-friendly depressant polyepoxysuccinic acid and its depression mechanism

Nie, Qingmin; Qiu, Tingsheng; Yan, Huashan; Li, Yonggai

doi:10.1016/j.apsusc.2022.152941

Cited by 16 publications

(5 citation statements)

References 38 publications

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“…Three times repetitions were performed, and error bars indicate the difference between the extreme and mean values. 22,23 FT-IR Analysis. An FT-IR spectrometer (Nicolet iS 5, USA) was used to obtain FT-IR spectra.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Flotation Separation of Fluorite from Calcite using an Efficient Depressant Nitrilotriacetic Acid in the NaOL System

Xie,

Zhao,

Wang

et al. 2024

Langmuir

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Fluorite and calcite were separated with nitrilotriacetic acid (NTA) as a depressant. The single mineral flotation experiment confirmed that with 40 mg/L NaOL and 80 mg/L NTA, the fluorite recovery and calcite recovery were 24.37 and 94.13%, respectively, at pH 9. Meanwhile, in the fluorite-calcite binary mixed ore flotation experiment, the calcite recovery and fluorite recovery were 75.50 and 26.84%, respectively, and the CaCO 3 and CaF 2 grade in concentrate was 74.32 and 25.61%, respectively. The results confirmed that NTA could be used as a depressant to selectively inhibit fluorite flotation. The mechanism study illustrated that NTA was selectively reacted with fluorite by chemical interaction between O of NTA and Ca of fluorite. The adsorption of NTA on fluorite will impede the interaction between fluorite and NaOL. NTA could adsorb on fluorite in three ways, while the dominant two ways were the complex between double O of NTA and Ca of fluorite in a vertical model and the complex between double O of NTA and Ca of fluorite in a horizontal model.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

“…The 1992 rpm was the default value for the machine. Three times repetitions were performed, and error bars indicate the difference between the extreme and mean values. , …”

Section: Experimental Sectionmentioning

confidence: 99%

Flotation Separation of Fluorite from Calcite using an Efficient Depressant Nitrilotriacetic Acid in the NaOL System

Xie,

Zhao,

Wang

et al. 2024

Langmuir

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“…Water glass, as a commonly used inhibitor, provides limited inhibition of fluorite, especially to attain high-grade rare earth concentrates (REO > 58%), which requires that the CaO content should preferably be reduced to less than 5%. Apart from water glass, other depressants, including ethylene diamine tetraacetic acid [4], polyepoxysuccinic acid [11], xanthanate gum [5], and sodium lingosulfonate [12], have been reported for the separation of rare earth minerals through floatation. It has been demonstrated that these depressants, which contain abundant carboxyl and hydroxyl groups, can form complexes with calcium ions on the fluorite surface, hindering the adsorption of the collector and exerting only a marginal impact on bastnaesite.…”

Section: Introductionmentioning

confidence: 99%

Effect of an Environment-Friendly Depressant on the Flotation of Bastnaesite and Fluorite

Guo,

Hou,

Wang

et al. 2024

Minerals

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To overcome the difficulty of separating bastnaesite from fluorite through the flotation technique, the present study examined the suitability of sodium alginate (SA) as a depressant in the flotation process. The effect of SA on the flotation separation of bastnaesite and fluorite was evaluated using micro-flotation tests, zeta potential measurements, adsorption density measurements, Fourier infrared spectroscopy, and X-ray photoelectron spectroscopy. The micro-flotation results showed that SA exerted a strongly detrimental effect on fluorite flotation, while slightly affecting bastnaesite flotation. The surface chemistry results revealed that the -COO- and HO- functional groups in SA coordinated with Ca2+ on the fluorite surface, which induced hydrophilicity and hindered adsorption in the subsequent octylhydroxamic acid as a collector. However, the interaction of SA with the bastnaesite surface was marginal and did not affect the anchoring of the collector on the surface of bastnaesite. Based on these results, the present study proposes a possible model for the interaction of SA on the surfaces of the two minerals, laying a foundation for the flotation separation of bastnaesite from fluorite with SA as an environmentally benign depressant.

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“…Water glass, as a commonly used inhibitor, provides limited inhibition of fluorite, especially to attain high-grade rare earth concentrates (REO > 58%), which requires that the CaO content should preferably be reduced to less than 5%. Apart from water glass, other depressants including ethylene diamine tetraacetic acid [4], polyepoxysuccinic acid [11], xanthanate gum [5], and sodium lingosulfonate [12] have been reported for the separation of rare earth minerals through floatation. It has been demonstrated that these depressants, containing abundant carboxyl and hydroxyl groups, can form complexes with calcium ions on the fluorite surface, hindering the adsorption of the collector and exerting only a marginal impact on bastnaesite.…”

Section: Introductionmentioning

confidence: 99%

Effect of an Environment-Friendly Depressant on the Flotation of Bastnaesite and Fluorite

Guo,

Hou,

Wang

et al. 2023

Preprint

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To overcome the difficulty of separating bastnaesite from fluorite through the flota-tion technique, the present study examined the suitability of sodium alginate (SA) as a depressant in the flotation process. The effect of SA on the flotation separation of bastnaesite and fluorite was evaluated using micro-flotation tests, zeta potential meas-urements, adsorption density measurements, Fourier infrared spectroscopy, and X-ray photoelectron spectroscopy. The micro-flotation results showed that SA exerted a strongly detrimental effect on fluorite flotation, while slightly affecting bastnaesite flotation. The surface chemistry results revealed that the -COO- and HO- functional groups in SA coordinated with Ca2+ on the fluorite surface, which induced hydro-philicity and hindered the adsorption in the subsequent collector. However, the inter-action of SA with the bastnaesite surface was marginal and did not affect the anchor-ing of the collector on the surface of bastnaesite. Based on these results, the present study proposes a possible model for the interaction of SA on the surfaces of the two minerals, laying a foundation for the flotation separation of bastnaesite from fluorite with SA as an environmentally benign depressant.

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Flotation separation of bastnaesite from fluorite with an eco-friendly depressant polyepoxysuccinic acid and its depression mechanism

Cited by 16 publications

References 38 publications

Flotation Separation of Fluorite from Calcite using an Efficient Depressant Nitrilotriacetic Acid in the NaOL System

Flotation Separation of Fluorite from Calcite using an Efficient Depressant Nitrilotriacetic Acid in the NaOL System

Effect of an Environment-Friendly Depressant on the Flotation of Bastnaesite and Fluorite

Effect of an Environment-Friendly Depressant on the Flotation of Bastnaesite and Fluorite

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