Effects of ultrasonic pre-treatment on the flotation of ilmenite and collector adsorption

Shu, Kaiqian; Xu, Longhua; Wu, Houqin; Fang, Shuai; Wang, Zhoujie; Yang, Xu; Zhang, Zhenyue

doi:10.1016/j.mineng.2019.04.001

Cited by 69 publications

(12 citation statements)

References 43 publications

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“…12 showed that the content of rare earth elements decreased gradually with the ore particle size increasing in the leaching process. This behavior was mainly because the specific surface area of mineral particles increased with the particle size decreasing (Shu et al, 2019). -0.075mm particles with large specific surface area having strong absorption capacity adsorbed a lot of rare earth ions.…”

Section: Relation Between Particles Size and Rare Earth Contentmentioning

confidence: 98%

Seepage mechanism during in-situ leaching process of weathered crust elution-deposited rare earth ores with magnesium salt

Liu

Zhang

Chi

2020

Physicochem. Probl. Miner. Process.

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To reveal seepage mechanism during in-situ leaching process of weathered crust elutiondeposited rare earth ores with magnesium salt, the effects of particle gradation, particle migration, Atterberg limit on the permeability coefficient were investigated, and the relation between the particle size and rare earth content was discussed. The results showed that the ore in the humic layer (HL) with high porosity and permeability was uniformly graded particles. The ore in the completely weathered layer (CWL) with low porosity and permeability belonged to dense-graded particles. The ore in the partly weathered layer (PWL) was open-graded particles, whose permeability fell in between the HL and the PWL. The change of -0.075mm particles content was the largest in the leaching process. When -0.075mm particle content was less than 30%, the migration ability of fine particles and the permeability coefficient decreased gradually. On the contrary, the migration ability of fine particles gradually remained stable, and the change in the permeability coefficient was not obvious. The liquid limit (LL) in the Atterberg limit of HL, CWL and PWL was inversely proportional to the permeability coefficient, and followed the order: LLHL < LLPWL < LLCWL. With the -0.075mm particle content increasing, the LL of the ore samples increased gradually and finally tended to be stable. The peak value of rare earth concentration appeared earlier and the rare earth content decreased gradually with the increase of the ore particle size. This work provided a theoretical basis for achieving high-efficient mining of weathered crust elution-deposited rare earth ores.

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Section: Relation Between Particles Size and Rare Earth Contentmentioning

confidence: 98%

Seepage mechanism during in-situ leaching process of weathered crust elution-deposited rare earth ores with magnesium salt

Liu

Zhang

Chi

2020

Physicochem. Probl. Miner. Process.

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“…Using a zeta potential analyzer (ZetaPlus, Bruker, Berlin, Germany), the electrokinetic potential values were measured at 20 ± 0.5 • C. Then, at a given pH and reagent concentration, the preparation of mineral (-5 µm, by grinding -0.038 mm fractions using agate mortar) pulp containing solids (0.02 g) and KCl (40 mL, 1 mM) background electrolyte was carried out in a beaker [26]. After standing the solutions for 5 min, the supernate was taken to measure the electrokinetic surface potential.…”

Section: Electrokinetic Potential Testsmentioning

confidence: 99%

Colloidal ZnCO3 as a Powerful Depressant of Arsenopyrite in Weakly Alkaline Pulp and the Interaction Mechanism

Guan¹,

Ming²,

Xie³

et al. 2020

Minerals

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The effects of ZnSO4 on arsenopyrite depression were studied with sodium carbonate and sodium isobutyl xanthate (SIBX) as the pH regulator and collector, respectively. In both micro and real ore flotation tests, ZnSO4 showed better depression on arsenopyrite (pH 7.5–9.0 adjusted by Na2CO3) compared with sodium humate. The depression mechanism of ZnSO4 on arsenopyrite flotation was studied by electrokinetic potential, adsorbed amount measurements, scanning electron microscope (SEM) observation and energy dispersive spectra (EDS) detection. The electrokinetic potential measurement results show a potential increase forpleas the arsenopyrite treated with ZnSO4 in the pH range 7.5–9.0, which could be attributed to the formation of the precipitated zinc carbonate (ZnCO3(S)). For arsenopyrite treated with both ZnSO4 and SIBX, the electric surface potentials also display an increase, to approximate the values with solely ZnSO4 treated, at pH 7.5–9.0, indicating the inhibition of ZnCO3(S) upon the SIBX adsorption onto arsenopyrite. Adsorption results demonstrated that SIBX adsorption onto arsenopyrite indeed was inhibited at the pH 7.5-9.0 through the sharp decrease in SIBX adsorbed amount with ZnSO4 as the depressant at this pH range. SEM observation and EDS detection results verify the formation of colloidal ZnCO3 on the arsenopyrite, with ZnSO4 as the depressant in combination with Na2CO3.

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“…A slight increase in the collector concentration after ultrasonic pretreatment showed a significant increase in the flotation recovery, but this was not the case in raw target (ilmenite) mineral even at higher concentrations. Thus, pretreatment reduces reagent consumption (Shu et al, 2019).…”

Section: Ultrasonic Pretreatment Of Mineralsmentioning

confidence: 99%

“…The flotation mechanism on the surface of the ilmenite (black iron-titanium oxide ore) and the changes associated with the surface composition of ilmenite before and after the ultrasonic pretreatment was investigated. To verify, various mechanisms such as flotation tests, X-Ray photoelectron spectroscopy, Fourier transform infrared spectroscopy (FTIR), Zeta potential measurement, and microcalorimetry were conducted (Shu et al, 2019) and following were observed.…”

Section: Flotation Capacity Of Ilmenite Surface Pretreated Using Ultrmentioning

confidence: 99%

Dynamics of bubble-particle interaction in different flotation processes and applications - a review of recent studies

Patnaik¹,

Menon²,

Gupta³

et al. 2020

Physicochem. Probl. Miner. Process.

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Flotation process involves aggregation of the particles based on the material/compound type of random mixtures such as ores and seawater. It is primarily used in pretreatment of water desalination and other industrial applications. The process makes use of various fluid mechanics principles as multifluids are involved. The multi-fluids in most of the flotation processes are of different phases, such as air and water. Like any other process, the efficiency of flotation is important, and hence most of the studies have been dedicated to understanding how the various parameters are affecting the flotation process. Among various parameters, fluids properties and flow parameters chiefly affect the flotation process. In particular, the bubble-particle interaction of the flotation process has been of interest as it is one of the cost-effective ways to enhance flotation efficiency. In this review, the authors present the latest developments in such parametric studies. This paper could be of interest to research students, academic researchers, and practitioners who want to contribute to (or take from) flotation research.

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Effects of ultrasonic pre-treatment on the flotation of ilmenite and collector adsorption

Cited by 69 publications

References 43 publications

Seepage mechanism during in-situ leaching process of weathered crust elution-deposited rare earth ores with magnesium salt

Seepage mechanism during in-situ leaching process of weathered crust elution-deposited rare earth ores with magnesium salt

Colloidal ZnCO3 as a Powerful Depressant of Arsenopyrite in Weakly Alkaline Pulp and the Interaction Mechanism

Dynamics of bubble-particle interaction in different flotation processes and applications - a review of recent studies

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