Application of Pyridyl Ionic Liquids in the Reverse Flotation of Shengli Lignite
Lignite is extremely hydrophilic; thus it is difficult to upgrade its quality by conventional flotation. In this study, cetylpyridinium chloride monohydrate (CCM) was used as the collector for quartz. The effect of CCM dosage on reverse flotation of Shengli lignite was investigated by different slur...
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| Format: | Article |
| Language: | zho |
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Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences
2022-04-01
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| Series: | Kuangchan zonghe liyong |
| Subjects: | |
| Online Access: | http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2022.02.021 |
| _version_ | 1811178443023319040 |
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| author | Xu Zhang Zhaoyi Yu Yaqun He Jie Wang |
| author_facet | Xu Zhang Zhaoyi Yu Yaqun He Jie Wang |
| author_sort | Xu Zhang |
| collection | DOAJ |
| description | Lignite is extremely hydrophilic; thus it is difficult to upgrade its quality by conventional flotation. In this study, cetylpyridinium chloride monohydrate (CCM) was used as the collector for quartz. The effect of CCM dosage on reverse flotation of Shengli lignite was investigated by different slurry mixing methods. And the dissolution properties of CCM and its mechanism of collecting quartz were studied via surface tensitometer and FTIR. The flotation results show that, due to the strong hydrophilicity of Shengli lignite, the performance of direct flotation is poor. With reverse flotation, the yield of clean coal and the flotation perfection are obviously improved. Besides, the reverse flotation with the zero-conditioning is more efficient than the conventional one. FTIR results show that the adsorption of CCM barely change the functional groups of quartz, indicating that CCM was adsorbed on the surface of quartz through electrostatic adsorption to collect quartz. Meanwhile, CCM adsorption significantly reduces the content of hydroxyl oxygen-containing functional groups of quartz, leading to an increase of the content of hydrophobic groups such as long-chain alkyl. As a result, the hydrophobicity of quartz was improved, and the reverse flotation of lignite was promoted. |
| first_indexed | 2024-04-11T06:18:25Z |
| format | Article |
| id | doaj.art-54be0e430a434b9fb625bf18e57fec16 |
| institution | Directory Open Access Journal |
| issn | 1000-6532 |
| language | zho |
| last_indexed | 2024-04-11T06:18:25Z |
| publishDate | 2022-04-01 |
| publisher | Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences |
| record_format | Article |
| series | Kuangchan zonghe liyong |
| spelling | doaj.art-54be0e430a434b9fb625bf18e57fec162022-12-22T04:40:58ZzhoInstitute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological SciencesKuangchan zonghe liyong1000-65322022-04-01null211612010.3969/j.issn.1000-6532.2022.02.0212022-02zhangxuApplication of Pyridyl Ionic Liquids in the Reverse Flotation of Shengli LigniteXu Zhang0Zhaoyi Yu1Yaqun He2Jie Wang3School of Chemical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaSchool of Chemical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaSchool of Chemical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaModern Analysis & Computing Center, China University of Mining and Technology, Xuzhou, Jiangsu, ChinaLignite is extremely hydrophilic; thus it is difficult to upgrade its quality by conventional flotation. In this study, cetylpyridinium chloride monohydrate (CCM) was used as the collector for quartz. The effect of CCM dosage on reverse flotation of Shengli lignite was investigated by different slurry mixing methods. And the dissolution properties of CCM and its mechanism of collecting quartz were studied via surface tensitometer and FTIR. The flotation results show that, due to the strong hydrophilicity of Shengli lignite, the performance of direct flotation is poor. With reverse flotation, the yield of clean coal and the flotation perfection are obviously improved. Besides, the reverse flotation with the zero-conditioning is more efficient than the conventional one. FTIR results show that the adsorption of CCM barely change the functional groups of quartz, indicating that CCM was adsorbed on the surface of quartz through electrostatic adsorption to collect quartz. Meanwhile, CCM adsorption significantly reduces the content of hydroxyl oxygen-containing functional groups of quartz, leading to an increase of the content of hydrophobic groups such as long-chain alkyl. As a result, the hydrophobicity of quartz was improved, and the reverse flotation of lignite was promoted.http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2022.02.021lignitequartzreverse flotationionic liquidsinfrared spectroscopy |
| spellingShingle | Xu Zhang Zhaoyi Yu Yaqun He Jie Wang Application of Pyridyl Ionic Liquids in the Reverse Flotation of Shengli Lignite Kuangchan zonghe liyong lignite quartz reverse flotation ionic liquids infrared spectroscopy |
| title | Application of Pyridyl Ionic Liquids in the Reverse Flotation of Shengli Lignite |
| title_full | Application of Pyridyl Ionic Liquids in the Reverse Flotation of Shengli Lignite |
| title_fullStr | Application of Pyridyl Ionic Liquids in the Reverse Flotation of Shengli Lignite |
| title_full_unstemmed | Application of Pyridyl Ionic Liquids in the Reverse Flotation of Shengli Lignite |
| title_short | Application of Pyridyl Ionic Liquids in the Reverse Flotation of Shengli Lignite |
| title_sort | application of pyridyl ionic liquids in the reverse flotation of shengli lignite |
| topic | lignite quartz reverse flotation ionic liquids infrared spectroscopy |
| url | http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2022.02.021 |
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