| 光谱学与光谱分析 |
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| The Study of Spectral Characteristic of Coal Ash from Different Sources with Laser-Induced Breakdown Spectroscopy |
| SHEN Yue-liang1, LU Ji-dong2*, ZHANG Bo2 |
1. Institute of Electric Power Science, Guangdong Electric Grid Company, Guangzhou 510080, China
2. College of Electric Power, South China University of Science and Technology, Guangzhou 510640, China |
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Abstract The samples with different carbon content are collected for quantitative analysis. One of the normal methods is the ignition of different coals according to the notice of fast ashing method instead of collecting coal ash in boiler. But there are some differences between fast ashing method in laboratory and actual boiler. It is necessary that the spectral deviation of coal ash from these two sources is studied as a guidance of quantitative analysis in carbon content. In present work, the intensity of the characteristic lines and plasma temperature were compared with different carbon content from these two processes. As a result, Fe, Mg, Al line strength of ash with fast ashing method is stronger and plasma temperature is lower than coal ash in boiler. Principal component analysis was processed, the results show that the difference of Fe, Mg, Al and Si content is the primary factor, and minerals in coal ash with fast ashing method may influence the spectral characteristic. The influence of mineral elements and mineral content on spectra for quantitative analysis with fast ashing method should be noticed.
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Received: 2015-09-30
Accepted: 2016-01-24
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Corresponding Authors:
LU Ji-dong
E-mail: jdlu@scut.edu.cn
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