Carrier Flotation of Low-Rank Coal with Polystyrene
| Autor: | Jiaqi Xu, Gen Huang, Pengyue Geng, Jihui Li |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
lcsh:QE351-399.2 Scanning electron microscope combustible recovery 02 engineering and technology polystyrene complex mixtures Hydrophobic effect chemistry.chemical_compound Adsorption 020401 chemical engineering otorhinolaryngologic diseases carrier flotation Coal 0204 chemical engineering chemistry.chemical_classification Kerosene lcsh:Mineralogy business.industry Geology 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology low-rank coal Hydrocarbon chemistry Chemical engineering Particle Polystyrene 0210 nano-technology business |
| Zdroj: | Minerals Volume 10 Issue 5 Minerals, Vol 10, Iss 452, p 452 (2020) |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min10050452 |
| Popis: | The problem of low-rank coal flotation continues to be a challenge due to the poor hydrophobicity and abundant oxygenated functional groups on particle surfaces. In this study, carrier flotation was used to improve the flotation performance of low-rank coal with polystyrene as a carrier material. Kerosene was used as a collector and played a role in the adhesion of fine low-rank coal to polystyrene due to its hydrophobic properties. The carrier feature of polystyrene was demonstrated by Turbiscan Lab Expert stability analysis and scanning electron microscopy analysis. The flotation experiments revealed that the optimum conditions were: collector dosage 5000 g/t, pulp concentration 40 g/L, and the ratio of low-rank coal to polystyrene 100:10. Under these conditions, the combustible recovery by carrier flotation was obtained as 70.59% when the ash content was 12.32%, which increased by 25.68 points compared with the combustible recovery of conventional flotation under almost the same ash content. The fine coal particles coated the coarse polystyrene particles through hydrophobic interactions between the polystyrene and hydrocarbon chains of the kerosene adsorbed on coal particles. The results suggested that the flotation performance of low-rank coal was significantly improved by carrier flotation with polystyrene, especially for fine particles. |
| Databáze: | OpenAIRE |
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