Study on the mechanism and application of a novel collector-complexes in cassiterite flotation

Tian, Mengjie; Hu, Yuehua; Sun, Wei; Liu, Runqing

doi:10.1016/j.colsurfa.2017.02.051

Cited by 61 publications

(25 citation statements)

References 16 publications

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“…Figure 6a illustrates the zeta potential of cassiterite as a function of pH. In the absence of flotation reagents, the zeta potential of cassiterite decreased gradually as the value of pH increased, and the isoelectric point (IEP) of cassiterite was observed at approximately pH 2.5, which was in line with previously reported values [14,18]. The significant rise in the zeta potential of cassiterite after LN treatment signified Pb 2+ cation adsorption, while the obvious decrease in the zeta potential of the cassiterite surface after SHA treatment, especially in the pH range of 6-8, signified SHA -anion adsorption.…”

Section: Zeta Potential Measurementssupporting

confidence: 78%

“…As described in previous publications, flotation tests of single mineral and mixed binary minerals were performed in an XFG-type flotation machine at a spindle speed of 1600 rpm [16][17][18]34]. In each test, the mineral suspension was prepared by adding 2.0 g of single mineral samples (1 g cassiterite and 1 g calcite for mixed binary minerals flotation) and 40 mL of deionized water to the cell.…”

Section: Flotation Testsmentioning

confidence: 99%

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Selective Flotation of Cassiterite from Calcite with Salicylhydroxamic Acid Collector and Carboxymethyl Cellulose Depressant

Tian

Gao

et al. 2018

Minerals

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Abstract:Cassiterite is the most common and important tin-bearing mineral, and calcite, a primary gangue mineral is generally found in tin deposit. The flotation separation of cassiterite from calcite remains a challenge due to their similar response to traditional reagents. In cassiterite flotation, sodium oleate (NaOL) and sodium silicate (SS) have been widely used as a collector and a depressant, respectively. However, the low selectivity of NaOL and the large amount of SS required (which leads to serious problems in wastewater treatment) remain a difficult issue. In this study, a novel reagent scheme using lead nitrate as the activator, salicylhydroxamic acid (SHA) as the collector and carboxymethyl cellulose as the depressant was employed to improve the separation selectivity of cassiterite from calcite. Results of the flotation experiment using this new reagent scheme showed that compared with the previously reported scheme using benzohydroxamic acid (BHA) as the collector, the separation of cassiterite from calcite exhibited a higher selectivity and selectivity index (SI). The mechanism of the selective separation was investigated by zeta potential measurements, Fourier transform infrared and X-ray photoelectron spectroscopy analysis.

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Section: Zeta Potential Measurementssupporting

confidence: 78%

Section: Flotation Testsmentioning

confidence: 99%

Selective Flotation of Cassiterite from Calcite with Salicylhydroxamic Acid Collector and Carboxymethyl Cellulose Depressant

Tian

Gao

et al. 2018

Minerals

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“…Our previous studies [9,10] indicated that Pb-BHA complexes had good selectivity for the separation of scheelite from calcium minerals by regulating the Pb/BHA ratio and pH value with the recovery of tungsten minerals being significantly improved. Tian et al [11] proved that cassiterite can be separated efficiently from cassiterite-calcite binary mixed minerals by using Pb-BHA complexes as the collector, and carboxymethyl cellulose as the depressant. Therefore, it can be speculated that tungsten minerals and cassiterite minerals could be enriched together by Pb-BHA complexes, which will significantly improve the recovery of fine tungsten and cassiterite minerals.…”

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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“…Recently, their promising applications in mining have attracted research attention [1][2][3][4][5][6][7][8]. For instance, lead(II)-benzohydroxamic acid (Pb [II]-BHA) complexes are effective collectors in the beneficiation of oxide minerals, including tungsten minerals, cassiterite, and rutile [9,10]. Given the excellent selectivity and good collecting ability of Pb(II)-BHA, the scheelite flotation process could be simplified remarkably without the addition of sodium silicate, overcoming the shortage of heating in the routine flotation of scheelite [9][10][11].The beneficiation of scheelite is currently one of the most challenging problems worldwide in the field of mineral processing.…”

Section: Introductionmentioning

confidence: 99%

Novel Insights into the Configurations of Lead(II)-Benzohydroxamic Acid Coordination Compounds in Aqueous: A Combined Experimental and Computational Study

He¹,

Han²,

Zhang³

et al. 2018

Preprint

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Novel collector lead(II)-benzohydroxamic acid (Pb [II]-BHA) complexes in aqueous solution were characterized by using experimental approaches, including Fourier-transform infrared spectroscopy (FTIR), powder X-ray diffraction spectroscopy (PXRD), Ultraviolet-visible (UV-Vis) spectroscopy, and electrospray ionization–mass spectrometry (ESI-MS), and first-principle density functional theory (DFT) calculations with consideration of solvation effects. The Job plot delineated that a single coordinated Pb(BHA)+ should be formed first, and the binary structures of Pb(BHA)2 can be formed subsequently. Moreover, the Pb(II)-BHA species aggregated with each other to form highly complicated structures. ESI-MS results validated the existence of Pb-(BHA)n=1,2. The well-consistent infrared spectra from the DFT calculations and FTIR measurements indicated that the cis-amide (Za)-type BHA conformer may be dominant in the solid-state crystals of BHA. The first-principle calculations suggested that Pb(BHA)2 should be the most stable structure, and the Pb atom in Pb(BHA)+ will play as an active site to attack nucleophiles. These findings are meaningful to further illustrate the adsorption mechanism of Pb(II)-BHA complexes in mineral processing.

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Study on the mechanism and application of a novel collector-complexes in cassiterite flotation

Cited by 61 publications

References 16 publications

Selective Flotation of Cassiterite from Calcite with Salicylhydroxamic Acid Collector and Carboxymethyl Cellulose Depressant

Selective Flotation of Cassiterite from Calcite with Salicylhydroxamic Acid Collector and Carboxymethyl Cellulose Depressant

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

Novel Insights into the Configurations of Lead(II)-Benzohydroxamic Acid Coordination Compounds in Aqueous: A Combined Experimental and Computational Study

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