光谱学与光谱分析 |
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Multi-Element Detection in Molten Steel with Laser-Induced Breakdown Spectroscopy |
YU Yun-si1, PAN Cong-yuan1, ZENG Qiang1, DU Xue-wei1, WEI Shen1, WANG Sheng-bo2, WANG Qiu-ping1* |
1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
2. Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei 230026, China |
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Abstract On-line element content detection in iron and steel industry is one of the key techniques to ensure the quality in iron and steel metallurgy. Laser Induced Breakdown Spectroscopy (LIBS) has been applied to on-line components detection in molten steel. We have built LIBS system for components detection of molten steel in laboratory. The system consists of a Q-switched Nd∶YAG laser (repetition rate 10 Hz, wavelength 1 064 nm, pulse length 10 ns, pulse energy about 120 mJ), high frequency induction furnace (temperature 1 600 ℃), spectrometer (wavelength range 186~310 nm, spectral resolution 0.1 nm), laser focusing and spectral signal collecting system. Multi-elements were detected in molten steel with the application of deep-UV detector coating and solarization resistant fibers. According to the calibration curves of C, S, Mn and Cr, the limit of detections are 169, 15, 58.9 and 210 μg·g-1 respectively. The R-squares of calibration curves of C, S, Mn, and Cr are better than 0.96 by using appropriate analytical lines and reference lines. At the same time, through the comparison of different elements, we find the best calibration curve of different element need different delay conditions.
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Received: 2015-01-23
Accepted: 2015-05-26
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Corresponding Authors:
WANG Qiu-ping
E-mail: qiuping@ustc.edu.cn
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