Intensification mechanism of oxidized coal flotation by using oxygen-containing collector α-furanacrylic acid

Gui, Xiahui; Xing, Yaowen; Wang, Tingxia; Cao, Yijun; Miao, Zhenyong; Xu, Min

doi:10.1016/j.powtec.2016.09.058

Cited by 103 publications

(28 citation statements)

References 23 publications

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“…During the process, various types of reagents are used to change the surface properties of minerals [4]. An urgent demand should not only enhance the flotation, but also other associated operations, such as grinding [5][6][7]. Simultaneously, the addition of chemical reagents during the grinding process makes it possible to increase the selectivity of flotation enrichment due to the continuous positive influence of these reagents on the newly created mineral surface [8,9].…”

Section: Introductionmentioning

confidence: 99%

Selective flotation of phosphorus-bearing ores

et al. 2020

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This paper presents the results of the beneficiation of a phosphorus-bearing mineral through selective flotation process. The chemical examination showed that the sample contain a low content of P2O5 12.5 % and significant amounts of rare earth elements (REE), %: yttrium - 0.01, lanthanum - 0.06, cerium - 0.09, neodymium - 0.03. The particle size distribution of the sample was performed, and each separated fraction was chemically analyzed. A detailed examination of the mineralog ical characteristics was conducted using automated mineral liberation analyzer (MLA). It has been shown that the apatite particles are mostly liberated in all fraction sizes. The maximum percentage of apatite polymineral aggregate was recorded in the grain size of -0.5 + 0.2 mm, mainly with nepheline and pyroxenes. The maximum percentage of apatite binary aggregate was noted in the grain size of -0.16 + 0.071 and -0.071 + 0.045 mm. Based on the obtained results, the size of the flotation feed was predetermined, which allowing the complete liberation of phosphorusbearing mineral (apatite) and avoiding over-grinding of the ore.

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Section: Introductionmentioning

confidence: 99%

Selective flotation of phosphorus-bearing ores

et al. 2020

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“…The amphiphilic surfactants composed of polar groups and nonpolar hydrocarbon chains have often been used as polar collectors to improve the flotation of oxidized coal (Harris et al, 1995;Renhe Jia 2000;Dey, 2012;Qu et al, 2015;Gui et al, 2017;Wang et al, 2018). It is recognized that surfactants can adsorb on the oxidized coal through interaction between the head groups of surfactants and oxygen-containing groups on coal surfaces with surfactant tails orienting outwards, which is called "head-on" adsorption, thus increasing the hydrophobicity of oxidized coal.…”

Section: Introductionmentioning

confidence: 99%

Effect of saline water on the synergistic interaction between diesel and Triton X-100 in the flotation of oxidized coal

Chang¹,

Diallo²,

Feng³

2020

Physicochem. Probl. Miner. Process.

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In this study, the effect of medium saline water on the synergistic interaction between diesel and Triton X-100 in the flotation of oxidized coal was investigated. The results showed that the flotation yield of oxidized coal in saline water was higher than that in de-ionized (DI) water due to the promotion of diesel adsorption, which was attributed to the screening of electrostatic repulsion between diesel droplets and coal particles in saline water. Meanwhile, the flotation of oxidized coal could be significantly improved when Triton X-100 was added with diesel as a composite collector, and less Triton X-100 was required in saline water than that in DI water to achieve the same true flotation yield, indicating that saline water could increase the effectiveness of Triton X-100 in improving oxidized coal flotation. A mechanism study revealed that Triton X-100 was able to promote diesel adsorption on oxidized coal through emulsification, thus increasing the surface hydrophobicity of oxidized coal through hydrogen bonding between the headgroups of Triton X-100 and the oxygenated groups on coal surfaces. The non-ionic characteristic of Triton X-100 ensured its capability of enhancing oxidized coal flotation in both DI water and saline water.

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“…However, the adsorption efficiency of oil collectors on oxidized coal surfaces was decreased significantly. To float oxidized coals, a number of works on polar collector, pretreatment, and new flotation procedures have been reported [6,[12][13][14][15][16]].…”

Section: Introductionmentioning

confidence: 99%

Effect of Heating Oxidation on the Surface/Interface Properties and Floatability of Anthracite Coal

Rong

Wang

et al. 2019

Processes

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Oxidation processes of coal surfaces are both fundamental and interesting from academic and engineering points of view. In this work, we comprehensively analyzed the mechanism of heating oxidation at 200 • C on the surface/interface characters and the floatability of anthracite coal. The variations of surface/interface characters were studied using SEM (scanning electron microscopy), FTIR (Fourier transform infrared spectroscopy), and XPS (X-ray photoelectron spectroscopy). The floatability was further identified using Induction Time and Bubble-Particle Wrap Angle. It was found that, after heating oxidation at 200 • C, both surface ravines and oxygen-containing groups were increased. The degradation of hydroxyl on anthracite could be neglected during the heating, while the oxidation of hydrocarbon chains dominated the balance of hydrophobicity and hydrophilicity on coal surface. The induction time significantly increased from 200 ms to 1200 ms and 2000 ms after 10 h and 20 h of heating oxidation at 200 • C, respectively. Additionally, raw coal exhibited the fastest kinetics of bubble-particle attachment and the largest wrap angle, directly proving that the floatability decreased after oxidation.

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Intensification mechanism of oxidized coal flotation by using oxygen-containing collector α-furanacrylic acid

Cited by 103 publications

References 23 publications

Selective flotation of phosphorus-bearing ores

Selective flotation of phosphorus-bearing ores

Effect of saline water on the synergistic interaction between diesel and Triton X-100 in the flotation of oxidized coal

Effect of Heating Oxidation on the Surface/Interface Properties and Floatability of Anthracite Coal

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