Application of modified diesel in long-flame coal flotation and optimization of flotation process parameters.
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| Title: | Application of modified diesel in long-flame coal flotation and optimization of flotation process parameters. |
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| Authors: | Chen, Songjiang1 (AUTHOR) chen.songjiang@xust.edu.cn, Zhou, Kexin1 (AUTHOR), Xie, Runchen1 (AUTHOR), Feng, Junhao1 (AUTHOR), Zhang, Ningning1 (AUTHOR), Zhu, Zhanglei1 (AUTHOR), Yu, Yuexian1 (AUTHOR), Li, Zhen1 (AUTHOR) |
| Source: | International Journal of Coal Preparation & Utilization. 2026, Vol. 46 Issue 6, p1507-1527. 21p. |
| Subject Terms: | *Flotation, *Coal, *Oxygenated diesel fuels |
| Abstract: | Low-rank coals due to their strong surface hydrophilicity often response poorly to the flotation process with the traditional hydrocarbon oil used as collectors. In this study, a novel collector, i.e. oxidized diesel, containing oxygenated groups, was prepared via an instantaneous gasification-oxidation-condensation device for the expected enhancement of low-rank coal flotation. The FTIR and XPS analyses showed that the coal sample had rich oxygenated groups on its surface, causing extremely low floatability. The combustible matter recovery in flotation was only 67.25% even though consuming 100 kg/t of common diesel. In contrast, a combustible matter recovery of 90.52% could be obtained at a dosage of 6 kg/t of oxidized diesel, showing excellent flotation performance. Additionally, an optimization of the technological parameters, including the novel collector dosage, impeller speed, pulp concentration and aeration rate, was conducted regarding the flotation of coal sample via the software Design – Expert 12, and a function model of the combustible matter recovery was established. Finally, with the recovery model solved, an optimization scheme obtaining a combustible matter recovery of 86.64% was determined as collector dosage of 4.18 kg/t, the flotation pulp concentration of 40.00 g/L, the impeller speed of 1719 rpm, and the aeration rate of 0.02 m3/h. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | Low-rank coals due to their strong surface hydrophilicity often response poorly to the flotation process with the traditional hydrocarbon oil used as collectors. In this study, a novel collector, i.e. oxidized diesel, containing oxygenated groups, was prepared via an instantaneous gasification-oxidation-condensation device for the expected enhancement of low-rank coal flotation. The FTIR and XPS analyses showed that the coal sample had rich oxygenated groups on its surface, causing extremely low floatability. The combustible matter recovery in flotation was only 67.25% even though consuming 100 kg/t of common diesel. In contrast, a combustible matter recovery of 90.52% could be obtained at a dosage of 6 kg/t of oxidized diesel, showing excellent flotation performance. Additionally, an optimization of the technological parameters, including the novel collector dosage, impeller speed, pulp concentration and aeration rate, was conducted regarding the flotation of coal sample via the software Design – Expert 12, and a function model of the combustible matter recovery was established. Finally, with the recovery model solved, an optimization scheme obtaining a combustible matter recovery of 86.64% was determined as collector dosage of 4.18 kg/t, the flotation pulp concentration of 40.00 g/L, the impeller speed of 1719 rpm, and the aeration rate of 0.02 m3/h. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19392699 |
| DOI: | 10.1080/19392699.2025.2499891 |
