Investigation on the selectivity of N-((hydroxyamino)-alkyl) alkylamide surfactants for scheelite/calcite flotation separation

Deng, Lanqing; Gang, Zhao; Zhong, Hong; Wang, Shuai; Liu, Guangyi

doi:10.1016/j.jiec.2015.09.027

Cited by 128 publications

(33 citation statements)

References 35 publications

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“…The mineral suspension was prepared by adding 1.0 g of minerals (−2 µm) to deionized water [4,30], and the pH was adjusted to 13.5. Sodium oleate (2 × 10 −3 mol/L) and sodium silicate (1.2 × 10 −2 mol/L) or sodium sulfide (5 × 10 −3 mol/L) were added to the mineral suspension.…”

Section: Ftir Analysismentioning

confidence: 99%

“…Scheelite has surface properties and floatability similar to those of calcite and fluorite because of the same calcium ion species on their surfaces [31]. Calcium minerals have analogical reactive center and surface reactivity to traditional fatty acid collectors [30]. After primary enrichment by roughing, the classical Petrov process is commonly utilized to further separate scheelite from other calcium minerals [18].…”

Section: Effect Of Desorption Reagent Dose On Scheelite Heating Flotamentioning

confidence: 99%

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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: Ftir Analysismentioning

confidence: 99%

Section: Effect Of Desorption Reagent Dose On Scheelite Heating Flotamentioning

confidence: 99%

Significant Improvement in the Scheelite Heating Flotation with Sodium Sulfide

et al. 2018

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“…On the other hand, some highly selective chelate collectors, particularly hydroxamate types, have also been used for the efficient flotation of Ca-bearing mineral systems in the last decade [5][6][7][8]. These include (sodium) benzohydroxamate, salicylhydroxamic acid [9], amide hydroxamate [10], and alkyl hydroxamate [11]. The reaction mechanism of benzohydroxamic acid (BHA) with scheelite was investigated through a variety of detection methods, including zeta potential, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy, and the most accepted hypothesis is that a five-membered ring chelate was formed after BHA adsorption with the Ca atom on the scheelite surface [12].…”

Section: Introductionmentioning

confidence: 99%

New Combined Depressant/Collectors System for the Separation of Powellite from Dolomite and the Interaction Mechanism

et al. 2020

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The flotation beneficiation of powellite from dolomite was achieved with a new reagent system that consists of a mixed collector of sodium oleate (NaOl) and benzohydroxamic acid (BHA) and a depressant sodium hexametaphosphate (SHMP). The interaction mechanism of the reagent regime with minerals was studied using zeta potential and X-ray photoelectron spectroscopy (XPS) detection together with crystal chemistry and interaction energy analysis. The matching features of O–O distance in BHA with that in saline minerals and active site density/activity were used as methods to explain the reagent/mineral interaction. The results of microflotation finally established the new reagent regime at pH 8–12: 2.5 × 10−4 M SHMP, 2 × 10−4 M mixed collector containing 1.5 × 10−4 M NaOl and 0.5 × 10−4 M BHA. SHMP selectively depresses the adsorption of NaOl and BHA onto dolomite but minimally affects the adsorption of NaOl and BHA on the powellite surface.

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“…Those low-grade tungsten deposits are usually in finely disseminated form with a complicated composition, containing high calcium gangue minerals and multi valuable minerals, which create many challenges for tungsten extraction. Firstly, separation of scheelite from other calcium-bearing minerals by flotation is challenging due to their very similar surface properties [5][6][7][8]. Most attempts have only achieved limited success or specific application (related to the type or the location of the ore).…”

Section: Introductionmentioning

confidence: 99%

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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Investigation on the selectivity of N-((hydroxyamino)-alkyl) alkylamide surfactants for scheelite/calcite flotation separation

Cited by 128 publications

References 35 publications

Significant Improvement in the Scheelite Heating Flotation with Sodium Sulfide

Significant Improvement in the Scheelite Heating Flotation with Sodium Sulfide

New Combined Depressant/Collectors System for the Separation of Powellite from Dolomite and the Interaction Mechanism

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

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