| Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences | Host |
| Citation: |
Sui Wenhao, Liu Chuanben, Li Huihuan, Cui Guangwen. Study on Low Rank Coal Flotation Enhancement by Carboxylic Acid Collector Prepared from Gutter Oil[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(1): 185-190. doi: 10.3969/j.issn.1000-6532.2023.01.027
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Study on Low Rank Coal Flotation Enhancement by Carboxylic Acid Collector Prepared from Gutter Oil
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Abstract
Traditional non-polar oil collectors cannot achieve high recovery of low-rank coal because of the presence ofoxygen-containing groups at coal surface. Compared with the traditional diesel collector, the collector containing carboxylic acid functional groups was further synthesized to enhance the flotation of low rank coal based on the alcoholysis of waste oil into biodiesel. The mechanism of collector promoting flotation was further analyzed by infrared spectroscopy, nuclear magnetic hydrogen spectroscopy, X-ray photoelectron spectroscopy and contact angle measurement. Carboxylic acid collector, 0# diesel oil and biodiesel were used to carry out flotation tests on a low-level extremely difficult coal sample. The results showed that the carboxylic acid collector had the best flotation effect on clean coal. Compared with diesel collector, the yield of clean coal increased by 14.63%, and the ash content decreased by 12.06%.
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References
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Sui Wenhao, Liu Chuanben, Li Huihuan, Cui Guangwen. Study on Low Rank Coal Flotation Enhancement by Carboxylic Acid Collector Prepared from Gutter Oil[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(1): 185-190. doi: 10.3969/j.issn.1000-6532.2023.01.027
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Figure 1.
Low-rank coal sample floatability curve
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Figure 2.
Contact angle measurement results of coal particles before adsorption with reagent (left), after adsorption with diesel oil (middle) and after adsorption with carboxylic acid collector (right)
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Figure 3.
Adsorption heat curve of low rank coal with diesel oil (left) and carboxylic acid collector (right)
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Figure 4.
FTIR spectra of carboxylic acid collector
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Figure 5.
HNMR spectra of carboxylic acid collector
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Figure 6.
Infrared analysis FTIR spectra of low raw coal
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Figure 7.
Infrared analysis FTIR spectra of clean raw coal
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Figure 8.
XPS spectra of low raw coal
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Figure 9.
XPS spectra of clean coal