Effects of alkyl ether amine and calcium ions on fine quartz flotation and its guidance for upgrading vanadium from stone coal

Ren, Liuyi; Qiu, Hang; Zhang, Yimin; Nguyen, Anh V.; Zhang, Ming; Wei, Penggang; Long, Qiurong

doi:10.1016/j.powtec.2018.07.026

Cited by 43 publications

(14 citation statements)

References 31 publications

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“…The data show that Ca 2+ ions at higher concentrations tend to obtain a concentrate at a lower recovery of iron while Mg 2+ ions at higher concentrations seem to have a more positive effect on the flotation recovery. It is following the previous investigations reported by Ren et al (2018), which showed a drop by about 50% in the recovery of quartz in the presence of Ca 2+ ions at a concentration of 80 mg/dm 3 using ester amine as collectors. Feng et al (2018) found that the presence of Mg 2+ ions induced an increase in the recovery of quartz at a pH range of 9-10.…”

Section: Resultssupporting

confidence: 87%

“…This can be explained by the findings by Feng et al (2018), which showed that the presence of Mg 2+ ions induced an increase in the recovery of quartz at a pH range of 9-10. Ren et al (2018) also indicated a drop by about 50% on the recovery of quartz in the presence of Ca 2+ ions at a concentration of 80 mg/dm 3 using ester amine as collectors. Ruan et al (2018) and Feng et al (2018), however, suggested that the presence of both Ca 2+ and Mg 2+ ions induced an increase in the recovery of quartz by using an amine-type collector.…”

Section: The Roles Of Ca 2+ /Mg 2+ Ion Concentrations In the Water On The Flotation Propertiesmentioning

confidence: 90%

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Buffering of pulp pH and its influence on process water chemistry during iron ore flotation

Tang¹,

Xiao²

2021

Physicochem. Probl. Miner. Process.

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It is inevitable for the occurrences of pulp pH buffering during pH control in flotation as the minerals with acidic/alkali properties tend to interact with pH modifiers and restore the pulp pH. This could result in some disturbing ions and alter the water/pulp chemistry. The purpose of this study was to identify the influences of pulp pH buffering on process water chemistry through a series of pH buffering tests, bench flotation experiments, ore dissolution tests, zeta potential measurement, and Xray diffraction (XRD) analysis. The built-up and distribution of the dominant cations in the process water from different locations in an industrial flotation system of the iron ore were analyzed and recorded by Inductively Coupled Plasma-Optical Emission (ICP-OES) at a period of about six months when the operations were stable. The data showed that a near five-minute buffer of pulp pH at a range from near 7.9 to 8.9 occurred before it reached a stable value. At this period, the dissolution of Ca/Mg from the iron ore was dominant. And, the pulp pH at a lower value tended to induce more dissolved Ca 2+ and Mg 2+ ions. These divalent cations seem to have different influences on the flotation properties of iron oxides at the same concentrations, indicating a positive effect on the recovery of iron oxides with the presence of Mg 2+ ions but an opposite effect if Ca 2+ ions occurred. The presence of sulfate, however, tended to restore the floatability of silicate depressed by Ca 2+ ions.

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Section: Resultssupporting

confidence: 87%

Section: The Roles Of Ca 2+ /Mg 2+ Ion Concentrations In the Water On The Flotation Propertiesmentioning

confidence: 90%

Buffering of pulp pH and its influence on process water chemistry during iron ore flotation

Tang¹,

Xiao²

2021

Physicochem. Probl. Miner. Process.

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“…The application of Flotigam ® EDA (commercial ether monoamine) and its mechanism in the floatability of quartz have been reported in several studies [35][36][37]. Although few studies explored the effect of ether amines on the micaceous minerals' floatability (by conducting micro-flotation tests) [13,24], its effect and adsorption behavior on their surfaces, especially on their biotite and phlogopite surfaces, were not addressed in detail.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ether Mono Amine Collector on the Cationic Flotation of Micaceous Minerals—A Comparative Study

et al. 2021

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Micaceous minerals, known as layer silicates, are counted mostly as the gangue minerals associated with valuable minerals, especially iron oxides. They mainly reject through the reverse flotation process using the cationic collectors, e.g., ether amines, to improve process sustainability. Although ether amines have been applied for floating the wide range of silicates, few investigations explored their adsorption behaviors on the micaceous minerals. In this study, flotation of phlogopite, biotite, and quartz (for comparison purposes) in the presence of Flotigam®EDA (EDA) (commercial ether monoamine collector), at pH 10 was investigated through the single mineral micro–flotation experiments. Adsorption behaviors were explored by the contact angle, residual surface tension measurements, and zeta potential analyses. Micro–flotation outcomes indicated that the quartz floatability was more than phlogopite and biotite. In the presence of 30 mg/dm3 EDA, their recoveries were 97.1, 46.3, and 63.8%, respectively. Increasing EDA concentration made a substantial increase in micaceous minerals’ floatability. Adsorption assessments confirmed that increasing the EDA concentration resulted in higher adsorption of EDA onto the surface of micaceous minerals than the quartz (all by physical adsorption). Such a behavior could be related to the nature of micaceous minerals, including their layer structure and low hardness.

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“…The quartz spectrum displayed several peaks in the region of 2000-400 cm −1 . The peaks at 1085 and 794 cm −1 can be attributed to the asymmetric and symmetric stretching vibration of Si-O, and the peaks at 693 and 460 cm −1 were associated with the symmetrical and asymmetrical bending vibration [55,56]. No new peaks were formed in the FTIR spectrum of quartz treated by NaOL alone, and one can consider NaOL as the physical adsorption or non-adsorption on the quartz surface combined with the experimental results of micro-flotation.…”

Section: Ftir Testsmentioning

confidence: 89%

Novel Insights into the Hydroxylation Behaviors of α-Quartz (101) Surface and its Effects on the Adsorption of Sodium Oleate

Zhang

Hu$^{

et al. 2019

Minerals

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A scientific and rigorous study on the adsorption behavior and molecular mechanism of collector sodium oleate (NaOL) on a Ca2+-activated hydroxylated α-quartz surface was performed through experiments and density functional theory (DFT) simulations. The rarely reported hydroxylation behaviors of water molecules on the α-quartz (101) surface were first innovatively and systematically studied by DFT calculations. Both experimental and computational results consistently demonstrated that the adsorbed calcium species onto the hydroxylated structure can significantly enhance the adsorption of oleate ions, resulting in a higher quartz recovery. The calculated adsorption energies confirmed that the adsorbed hydrated Ca2+ in the form of Ca(H2O)3(OH)+ can greatly promote the adsorption of OL− on hydroxylated quartz (101). In addition, Mulliken population analysis together with electron density difference analysis intuitively illustrated the process of electron transfer and the Ca-bridge phenomenon between the hydroxylated surface and OL− ions. This work may offer new insights into the interaction mechanisms existing among oxidized minerals, aqueous medium, and flotation reagents.

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Effects of alkyl ether amine and calcium ions on fine quartz flotation and its guidance for upgrading vanadium from stone coal

Cited by 43 publications

References 31 publications

Buffering of pulp pH and its influence on process water chemistry during iron ore flotation

Buffering of pulp pH and its influence on process water chemistry during iron ore flotation

Effect of Ether Mono Amine Collector on the Cationic Flotation of Micaceous Minerals—A Comparative Study

Novel Insights into the Hydroxylation Behaviors of α-Quartz (101) Surface and its Effects on the Adsorption of Sodium Oleate

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