Emulsion collector formed by phase inversion composition (PIC) process for low-rank coal flotation: bubble-particle and emulsion-particle interaction mechanisms.
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| Title: | Emulsion collector formed by phase inversion composition (PIC) process for low-rank coal flotation: bubble-particle and emulsion-particle interaction mechanisms. |
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| Authors: | Kong, Yibo1,2 (AUTHOR), Li, Zhe1,3 (AUTHOR) lizhecup@126.com, Lu, Hang1,2 (AUTHOR), Ma, Zhenchao1,2 (AUTHOR), Liu, Jincheng1,2 (AUTHOR), Yang, Xuesong1 (AUTHOR), Zhou, Bobo1 (AUTHOR), Xing, Yaowen1 (AUTHOR), Gui, Xiahui1 (AUTHOR) guixiahui1985@163.com |
| Source: | International Journal of Coal Preparation & Utilization. 2026, Vol. 46 Issue 6, p1820-1843. 24p. |
| Subject Terms: | *Flotation reagents, *Emulsions, *Hydrophobic interactions, *Flotation |
| Abstract: | Emulsion collectors are highly effective for low-rank coal (LRC) flotation, improving dispersion and interaction between oily collectors and coal particles. However, their application often involves high equipment costs and energy consumption. This study employed the phase inversion composition (PIC) low-energy emulsification method to prepare the oil-in-water (O/W) emulsion collectors. The freshly prepared O/W emulsion collectors had strong stability, uniform droplet size (average droplet diameter, D50 = 0.5 μm), and low shear viscosity (<10 mPa‧s). Additionally, flotation tests revealed that the optimum emulsion collector (with 10% emulsifier) could achieve significantly higher flotation recovery rate 84.48% than individual diesel (17.17%), and the clean coal ash content could be decreased from 4.89% (diesel) to 3.79%. This was attributed the enhanced hydrophobicity (61° to 94° of CA) of LRC surface, increased bubble-particle wrap angle (130° to 277°) and detachment forces values (65.4 μN to 132.7 μN) after emulsion collector treatment. Furthermore, the wetting heat and adhesion forces of emulsion-particle were significantly higher than those of diesel-particle, indicating the strong adhesion interaction energy. This study introduces a low-energy emulsification method for preparation of efficient emulsion collector, providing potentials for wider industrial applications of improved LRC flotation. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | Emulsion collectors are highly effective for low-rank coal (LRC) flotation, improving dispersion and interaction between oily collectors and coal particles. However, their application often involves high equipment costs and energy consumption. This study employed the phase inversion composition (PIC) low-energy emulsification method to prepare the oil-in-water (O/W) emulsion collectors. The freshly prepared O/W emulsion collectors had strong stability, uniform droplet size (average droplet diameter, D50 = 0.5 μm), and low shear viscosity (<10 mPa‧s). Additionally, flotation tests revealed that the optimum emulsion collector (with 10% emulsifier) could achieve significantly higher flotation recovery rate 84.48% than individual diesel (17.17%), and the clean coal ash content could be decreased from 4.89% (diesel) to 3.79%. This was attributed the enhanced hydrophobicity (61° to 94° of CA) of LRC surface, increased bubble-particle wrap angle (130° to 277°) and detachment forces values (65.4 μN to 132.7 μN) after emulsion collector treatment. Furthermore, the wetting heat and adhesion forces of emulsion-particle were significantly higher than those of diesel-particle, indicating the strong adhesion interaction energy. This study introduces a low-energy emulsification method for preparation of efficient emulsion collector, providing potentials for wider industrial applications of improved LRC flotation. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19392699 |
| DOI: | 10.1080/19392699.2025.2512106 |
