Role of macromolecules in kaolinite flotation

Hu, Yuehua; Sun, Wei; Li, Hai-pu; Xu, Zhenghe

doi:10.1016/j.mineng.2004.04.012

Cited by 34 publications

(14 citation statements)

References 7 publications

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“…These results are in consistent with the previous theoretical and experimental studies, [35][36][37] which states that the cationic collectors show the stronger interaction energy with the K(s) surface than that of K(a) surface. In gas phase, for a particular collector the binding energies on three different surfaces vary as K(s) < Goethite < K(a), while on a particular surface the trend in binding energies of five different collectors is found to be MPGC > PGC > GC ~ NPGC > DNPGC.…”

Section: Physical Chemistry Chemical Physics Accepted Manuscriptsupporting

confidence: 93%

Adsorption of guanidinium collectors on aluminosilicate minerals – a density functional study

Nulakani

Baskar

Patra

et al. 2015

Phys. Chem. Chem. Phys.

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In this density functional theory based investigation, we have modelled and studied the adsorption behaviour of guanidinium cations and substituted (phenyl, methoxy phenyl, nitro phenyl and di-nitro phenyl) guanidinium cationic collectors on the basal surfaces of kaolinite and goethite. The adsorption behaviour is assessed in three different media, such as gas, explicit water and pH medium, to understand the affinity of GC collectors to the SiO4 tetrahedral and AlO6 octahedral surfaces of kaolinite. The tetrahedral siloxane surface possesses a larger binding affinity to GC collectors than the octahedral sites due to the presence of surface exposed oxygen atoms that are active in the intermolecular interactions. Furthermore, the inductive electronic effects of substituted guanidinium cations also play a key role in the adsorption mechanism. Highly positive cations result in a stronger electrostatic interaction and preferential adsorption with the kaolinite surfaces than low positive cations. Computed interaction energies and electron densities at the bond critical points suggest that the adsorption of guanidinium cations on the surfaces of kaolinite and goethite is due to the formation of intra/inter hydrogen bonding networks. Also, the electrostatic interaction favours the high adsorption ability of GC collectors in the pH medium than gas phase and water medium. The structures and energies of GC collectors pave an intuitive view for future experimental studies on mineral flotation.

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Section: Physical Chemistry Chemical Physics Accepted Manuscriptsupporting

confidence: 93%

Adsorption of guanidinium collectors on aluminosilicate minerals – a density functional study

Nulakani

Baskar

Patra

et al. 2015

Phys. Chem. Chem. Phys.

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“…Without polyacrylamide, the kaolinite recovery decreased from 70 to 15%, with increasing the pH from 2 to 10. However, with polyacrylamide as a flocculant, kaolinite recovery increased under both acidic and alkaline conditions [11].…”

Section: Introductionmentioning

confidence: 99%

“…The results of these studies showed that kaolinite flotation by cationic collectors was better under acidic conditions than in alkaline media [7][8][9][10][11][12][13]. Yuehua et al (2004) tried to increase kaolinite recovery in alkaline medium by using a macromolecule as a flocculant. Without polyacrylamide, the kaolinite recovery decreased from 70 to 15%, with increasing the pH from 2 to 10.…”

Section: Introductionmentioning

confidence: 99%

Flotation of kaolinite from tailings of kaolin-washing plants by cationic collectors

Barani

2016

E3S Web Conf.

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Abstract. Traditional processing of kaolin is achieved by dispersion of the mined ore and classification by means of multistage hydrocyclones. The inefficiencies inherent to cyclones produce a middling product that is commonly disposed back to the quarry. In this research recovery of kaolinite from tailings of the Zonoupz kaolin washing plant, which is located in Iran, was investigated by cationic flotation. Flotation experiments showed that flotation of kaolinite from tailings was much better in an acidic than in an alkaline medium containing cationic collectors.

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“…While its main application is in the paper industry, a large part of the studies involving kaolinite flotation is currently developed in China, where the mineral is treated as reject from bauxite deposits (RODR IGU E S , 2009;YUEHUA et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Bibliometric analysis on kaolinite flotation

Lieberknecht

Matai

Filho³

2017

REM, Int. Eng. J.

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The current work presents a bibliometric discussion on articles published worldwide concerning kaolinite flotation in international journals from 1992 to 2015. In total, 39 articles were selected from Elsevier's database, SciVerse ScienceDirect.This work allowed to recognize and identify which are the thematic and methodological trends that are being used, in addition to the main collectors used in kaolinite flotation. The results show that a significant amount of articles is produced by Chinese authors, especially from 2013, as China is the second highest aluminum producer in the world, and kaolinite is the reject in the reverse flotation process of diaspore.The results showed the difficulty of working with kaolinite flotation individually and confirmed that there is scientific collaboration among authors.Bibliometric analysis showed that the reagents used in kaolinite flotation tests are mostly derived from cationic nitrogenated compounds. Additionally, best recovery results from kaolinite flotation occurred in acidic media.

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Role of macromolecules in kaolinite flotation

Cited by 34 publications

References 7 publications

Adsorption of guanidinium collectors on aluminosilicate minerals – a density functional study

Adsorption of guanidinium collectors on aluminosilicate minerals – a density functional study

Flotation of kaolinite from tailings of kaolin-washing plants by cationic collectors

Bibliometric analysis on kaolinite flotation

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