Selective adsorption of a high-performance depressant onto dolomite causing effective flotation separation of magnesite from dolomite

Yang, Bin; Wang, Donghui; Cao, Shun‐an; Yin, Wanzhong; Xue, Jiwei; Zhu, Zhanglei; Fu, Yanghe; Yao, Jin

doi:10.1016/j.jcis.2020.05.100

Cited by 73 publications

(18 citation statements)

References 71 publications

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“…11 elucidates the two characteristic peaks located at 2974.04 cm -1 and 2923.90 cm -1 , are associated with the symmetric and asymmetric tensile vibration of -CH3 and -CH2, respectively. On the other hand, one new peak emerging at 1051.14 cm-1 is correlated with the tensile vibration absorption peak of the trans-P-O bond, and produces an anchoring effect, manifesting the chemical adsorption occurs originated from a mixed collector on magnesite surface Yang et al, 2020). Yao et al studied and found that the FTIR peak positions of magnesite before and after adsorption with collector were at 2883.18 cm -1 , 2949.22 cm -1 , and 2853.85cm -1 , 2922.86 cm -1 , respectively, which fits well with our results.…”

Section: Discussionmentioning

confidence: 99%

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Research on the mechanism of a mixed collector onto magnesite surface to improve the flotation separation of magnesite from hornblende

Wang¹,

Li²,

Dai³

et al. 2021

Physicochem. Probl. Miner. Process.

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Low-grade magnesite is not effectively used mainly due to high silicon content, especially the separation of magnesite and hornblende. In this research, a novel mixture of sodium oleate and dodecyl phosphate collector was used to increase the flotation difference between magnesite and hornblende. Artificially mixed mineral concentrates grade 47.10% (MgO content) concentrate recovery of 84.45% was obtained by micro flotation test, the results showed that the mixed collector of sodium oleate and dodecyl phosphate played a better selective promotion role in the flotation of magnesite. The interaction mechanism of this mixed collector with hornblende and magnesite surfaces was investigated using Fourier transform infrared spectroscopy (FTIR), zeta potential, and X-ray photoelectron spectroscopy (XPS), which showed that the mixed collector in terms of magnesium selection was mainly adsorbed on these magnesium sites of magnesite, and the surface of magnesite thus became hydrophobic, allowing magnesite to float and separate from hornblende.

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Section: Discussionmentioning

confidence: 99%

“…Each flotation experiment is repeated at least three tests under the same test conditions to obtain the mean value, and the recovery and taste for magnesite were thus evaluated. The mean values with a variation of ±2.5% for three independent tests were obtained Yang et al, 2020) .…”

Section: Micro-flotation Testsmentioning

confidence: 99%

Research on the mechanism of a mixed collector onto magnesite surface to improve the flotation separation of magnesite from hornblende

Wang¹,

Li²,

Dai³

et al. 2021

Physicochem. Probl. Miner. Process.

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“…It is a reagent widely used in water treatment. Yang, Wang, Cao, Yin, Xue, Zhu, Fu and Yao [14] applied on pure minerals, HEDP showed a very promising depressant with very selective depression dolomite. X-ray photoelectron spectroscopy (XPS) and infrared spectrum (IR) analyses indicated that HEDP strongly adsorbed onto the dolomite in advance occupies a large number of calcium sites whereas it had only slightly depressed magnesite.…”

Section: Replacement Of Shmp By a Novel Depressantmentioning

confidence: 98%

“…X-ray photoelectron spectroscopy (XPS) and infrared spectrum (IR) analyses indicated that HEDP strongly adsorbed onto the dolomite in advance occupies a large number of calcium sites whereas it had only slightly depressed magnesite. Also, the addition of HEDP prior to sodium oleate (NaOl) had no significant impact on the adsorption of NaOl onto magnesite, while it prevented adsorption of this collector onto dolomite surface [14].…”

Section: Replacement Of Shmp By a Novel Depressantmentioning

confidence: 99%

“…HEDP has also been proven to be a good fluorite inhibitor in separating fluorite from calcite via reverse flotation [33]. Furthermore, a recent study by Yang, Wang, Cao, Yin, Xue, Zhu, Fu and Yao [14] using HEDP as a depressant in single phase minerals displayed very selective depression of dolomite due to the HEDP strongly adsorbing onto dolomite with a higher calcium site density [14], whereas it had only slightly shown to depress magnesite.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Sodium Hexametaphosphate on the Flotation of Ultrafine Magnesite from Dolomite-rich Desliming Tailings

Hoang¹,

Ebert²,

Möckel³

et al. 2021

Preprint

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Depletion of ore deposits, increasing demand for raw materials, the need to process low-grade, complex and finely disseminated ores and the reprocessing of tailings are challenges, especially for froth flotation separation technologies. Even though capable of handling relatively fine grain sizes the flotation separation of very fine and ultrafine particles faces many problems still. Further, the flotation of low-contrast semi-soluble salt-type minerals with very similar surface properties, many complex interactions between minerals, reagents and dissolved species often result in poor selectivity. This study investigates the flotation beneficiation of ultrafine magnesite rich in dolomite from de-sliming, currently reported to the tailings. The paper especially focuses on the impact of the depressant sodium hexametaphosphate (SHMP) on: (i) the froth properties using dynamic froth analysis (DFA), (ii) the separation between magnesite and dolomite/calcite and (iii) its effect on the entrainment. Furthermore, the application of 1-hydroxyethylene-1,1-diphosphonic acid (HEDP) is a more environmentally friendly and low-cost alternative to SHMP is presented and discussed. The paper contributes to understanding on the complexity of depressant responses in froth flotation.

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Flotation separation of dolomite and brucite via selective adsorption of the inhibitor tetrasodium hydroxyethylphosphate

Gong,

Yao,

Yang

et al. 2023

J. Cent. South Univ.

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Selective adsorption of a high-performance depressant onto dolomite causing effective flotation separation of magnesite from dolomite

Cited by 73 publications

References 71 publications

Research on the mechanism of a mixed collector onto magnesite surface to improve the flotation separation of magnesite from hornblende

Research on the mechanism of a mixed collector onto magnesite surface to improve the flotation separation of magnesite from hornblende

Impact of Sodium Hexametaphosphate on the Flotation of Ultrafine Magnesite from Dolomite-rich Desliming Tailings

Flotation separation of dolomite and brucite via selective adsorption of the inhibitor tetrasodium hydroxyethylphosphate

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