Effect of polyaluminum chloride on the flotation separation of coal from kaolinite

Liang, Long; Peng, Yaoli; Tan, Jiakun; Xia, Wencheng; Xie, Guangyuan

doi:10.1016/j.minpro.2016.07.007

Cited by 16 publications

(9 citation statements)

References 41 publications

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“…Fu et al tried reverse flotation of kaolinite from high-ash fine coal using N , N -dimethyl dodecyl amine (DRN12) as a kaolinite collector and found that the beneficiation of kaolinite from the raw coal with DRN12 was effective only in a highly acidic pulp (pH = 3). Polyaluminum chloride (PAC), a cationic coagulant widely used in the water purification process was first introduced by Liang et al to reduce clay entrainment in high-ash coal flotation. Their results showed that PAC successfully reduced kaolinite entrainment, but with the trade-off of lower combustible recovery …”

Section: Introductionmentioning

confidence: 99%

“…Polyaluminum chloride (PAC), a cationic coagulant widely used in the water purification process was first introduced by Liang et al to reduce clay entrainment in high-ash coal flotation. Their results showed that PAC successfully reduced kaolinite entrainment, but with the trade-off of lower combustible recovery …”

Section: Introductionmentioning

confidence: 99%

“…In this study, we propose to separate high-ash fine coal using water containing PCNBs and PAC. Given the ability of PAC to reduce clay entrainment and the negative surface charge of coal at a neutral pH, , it was expected that NBs would become more capable of enhancing the flotation recovery after reversing the charge and a decent concentrate grade could be maintained in the presence of PAC.…”

Section: Introductionmentioning

confidence: 99%

“…Their results showed that PAC successfully reduced kaolinite entrainment, but with the trade-off of lower combustible recovery. 5 In recent years, nanobubbles (NBs) have gained much interest in froth flotation. Bulk NBs generated in pure water are negatively charged.…”

Section: Introductionmentioning

confidence: 99%

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Effective Separation of High-Ash Fine Coal Using Water Containing Positively Charged Nanobubbles and Polyaluminum Chloride

Zhang

Yao

et al. 2022

ACS Omega

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The coal industry is facing the challenge of treating high-ash fine coal. In this study, we proposed an effective method to handle high-ash fine coal using water containing positively charged nanobubbles (PCNBs) and polyaluminum chloride (PAC). For comparison, normal nanobubble (NB) water was tested in parallel. Flotation results of a modeled high-ash fine coal showed that compared to the use of NBs alone, an enhanced combustible recovery with a simultaneous reduction in ash recovery was obtained when using water containing PCNBs and PAC. Particle size distribution together with particle video microscopy (PVM) and the degree of entrainment analysis were conducted to understand the underpinning mechanism. It was found that the presence of PCNBs intensified the aggregation of fine coal particles, which accounted for the boosted combustible recovery. It was interesting that PAC could disrupt coal flocs induced by NBs, leading to the release of trapped kaolinite particles with alleviated clay recovery by entrapment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effective Separation of High-Ash Fine Coal Using Water Containing Positively Charged Nanobubbles and Polyaluminum Chloride

Zhang

Yao

et al. 2022

ACS Omega

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“…It was determined that SO was more beneficial to the flocculation than SDS [ 14 ]. In addition, Liang et al studied the effect of the polyaluminum chloride (PAC) on reducing the kaolinite entrainment on coal flotation [ 15 ]. Liu et al investigated the effect of butanol on quartz flotation when N-dodecyl ethylenediamine (ND) was used as collector, single mineral (hematite or quartz) flotation and artificial mixed mineral (hematite and quartz) separation were conducted, indicating that butanol could improve the collecting performance of ND on quartz [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Study on the aggregation behavior of kaolinite particles in the presence of cationic, anionic and non-ionic surfactants

et al. 2018

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Aggregation behaviors of kaolinite particles with different surfactants were studied in this paper. Aggregation settling yield and fractal dimension analysis were used to determine the aggregation results. Zeta potential measurements, adsorption tests, Infrared spectroscopy analysis and scanning electron microscope measurements were conducted for further investigation into the mechanism. Experimental results showed that much better aggregation results was obtained in the presence of cationic surfactant than that in the presence of anionic and non-ionic surfactants. 98% aggregation setting yield was obtained in the presence of dodecylamine. Adsorption tests indicated that the adsorption capacity of dodecylamine on kaolinite surface was larger than that of sodium oleate and Tween80. Zeta potential measurements confirmed that dodecylamine was more beneficial to the aggregation of kaolinite particles. Infrared spectroscopy analysis revealed that the adsorption of dodecylamine on kaolinite surface was attributed to electrostatic and hydrogen-bonding interactions. Sodium oleate was adsorbed by chemical adsorption. However, Tween80 can hardly be adsorbed by kaolinite surface.

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Effects of clay species on coal flotation under the cationic regulation

Bai

Liu

Zhao

et al. 2020

Chemical Physics Letters

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Effect of polyaluminum chloride on the flotation separation of coal from kaolinite

Cited by 16 publications

References 41 publications

Effective Separation of High-Ash Fine Coal Using Water Containing Positively Charged Nanobubbles and Polyaluminum Chloride

Effective Separation of High-Ash Fine Coal Using Water Containing Positively Charged Nanobubbles and Polyaluminum Chloride

Study on the aggregation behavior of kaolinite particles in the presence of cationic, anionic and non-ionic surfactants

Effects of clay species on coal flotation under the cationic regulation

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