Selective flotation of scheelite from calcite using Al-Na 2 SiO 3 polymer as depressant and Pb-BHA complexes as collector

Wei, Zhao; Hu, Yuehua; Han, Haisheng; Sun, Wei; Wang, Ruolin; Wang, Jianjun

doi:10.1016/j.mineng.2018.01.036

Cited by 69 publications

(30 citation statements)

References 25 publications

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“…Selective collectors, such as hydroxamic acids [9], quaternary ammonium salts [10], dodecylamine [11], amino phosphoric acids [12] and mixed collectors [13,14], have been investigated to improve the flotation of scheelite. Effective depressants, such as water glass (sodium silicate, Na 2 O•mSiO 2 •nH 2 O), acidified sodium silicate [15,16], aluminum-sodium silicate polymer [17], phosphates [18], tannins [19], etidronic acid [20] and calcium lignosulphonate [21], are used to enhance the separation of scheelite from calcium-bearing minerals.…”

Section: Introductionmentioning

confidence: 99%

Significant Improvement in the Scheelite Heating Flotation with Sodium Sulfide

et al. 2018

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An efficiently optimized reagent regime was investigated to improve scheelite heating flotation. The scheelite grade and recovery in the plant were significantly improved by 5% and 6%, respectively, which remarkably augmented the economic profit by $260,000 per month. The interaction mechanisms of sodium sulfide and sodium oleate with scheelite, calcite and fluorite were evaluated by adsorption amount and Fourier transform infrared (FTIR) analyses. Sodium sulfide exhibited an excellent ability to promote the adsorption and desorption of sodium oleate on the scheelite surface and from the calcite and fluorite surfaces, thus facilitating the separation of scheelite from fluorite and calcite.

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Section: Introductionmentioning

confidence: 99%

Significant Improvement in the Scheelite Heating Flotation with Sodium Sulfide

et al. 2018

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“…The calcium ion peaks of calcite conditioned with collector for 0 or 8 days shifted to higher binding energies at 347.12 eV and 350.68 eV, indicating that the electron density around the calcium ion changed. Meanwhile, the carboxyl groups (COO-) of the OA molecules were conjugated with the calcium ions exposed on the calcite surface [40]. Therefore, the conclusions provided further evidence for the chemical interaction between the OA molecules and calcite during the adsorption process.…”

Section: Effect Of Static Interaction Time On the Amount Of Oa In Colmentioning

confidence: 70%

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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“…Depressants for calcite have been widely reported in previous studies [12,[19][20][21], and aluminum silicate solutions (Al-SiO3) have been proven to be effective for scheelite flotation with Pb-BHA complexes as the collector [9,22,23]. Al-SiO3 was used as the depressant for the upgrading of the rougher concentrate in this research.…”

Section: Flotation Tests In Labmentioning

confidence: 89%

Beneficiation and Purification of Tungsten and Cassiterite Minerals Using Pb–BHA Complexes Flotation and Centrifugal Separation

Yue

Han

et al. 2018

Minerals

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Pb–BHA complexes have been shown to be selective for the separation of tungsten and cassiterite minerals from calcium minerals. These minerals could be enriched synchronously to some extent using Pb–BHA complexes flotation. However, it is difficult to further improve the quality and recovery of the scheelite, wolframite, and cassiterite concentrate due to their different behavior in flotation, such as flotation rate and sensitivities to depressants. Moreover, the super fine particles create some challenges for the cleaning flotation process. In this study, advanced gravity separators for super fine particles were introduced for the cleaning process based on the slight difference in the specific gravity of scheelite, wolframite, and cassiterite. The new process featured pre-enrichment using Pb–BHA flotation, and upgrading using gravity separation, taking into account both the similarities and differences in floatability and density of the different minerals. The grades of WO3 and Sn in the concentrate of the new process reached to 61% and 2.89%, respectively, and the recovery of Sn was significantly improved. In addition, gravity separation is highly efficient, cost effective, and chemical-free, which is environmentally friendly. This study has proven that physical separation can be used for the purification of flotation products and provide some solutions for separation problems of complex refractory ores, which has, up until now, been rarely reported in the literature and/or applied in mineral processing.

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Selective flotation of scheelite from calcite using Al-Na 2 SiO 3 polymer as depressant and Pb-BHA complexes as collector

Cited by 69 publications

References 25 publications

Significant Improvement in the Scheelite Heating Flotation with Sodium Sulfide

Significant Improvement in the Scheelite Heating Flotation with Sodium Sulfide

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

Beneficiation and Purification of Tungsten and Cassiterite Minerals Using Pb–BHA Complexes Flotation and Centrifugal Separation

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