首页|Characteristics of laser-induced break-down spectroscopy of liquid slag

Characteristics of laser-induced break-down spectroscopy of liquid slag

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Rapid online analysis of liquid slag is essential for optimizing the quality and energy efficiency of steel production.To investigate the key factors that affect the online measurement of refined slag using laser-induced breakdown spectroscopy(LIBS),this study examined the effects of slag composition and temperature on the intensity and stability of the LIBS spectra.The experimental temperature was controlled at three levels:1350 ℃,1400 ℃,and 1450 ℃.The results showed that slag composition and temperature significantly affected the intensity and stability of the LIBS spectra.Increasing the Fe content and temperature in the slag reduces its viscosity,resulting in an enhanced intensity and stability of the LIBS spectra.Additionally,42 refined slag samples were quantitatively analyzed for Fe,Si,Ca,Mg,Al,and Mn at 1350 ℃,1400 ℃,and 1450 ℃.The normalized full spectrum combined with partial least squares(PLS)quantification modeling was used,using the Ca Ⅱ 317.91 nm spectral line as an internal standard.The results show that using the internal standard normalization method can significantly reduce the influence of spectral fluctuations.Meanwhile,a temperature of 1450 ℃ has been found to yield superior results compared to both 1350 ℃ and 1400 ℃,and it is advantageous to conduct a quantitative analysis of the slag when it is in a"water-like"state with low viscosity.

laser-induced breakdown spectroscopy(LIBS)slagtemperaturecompositionviscosityinternal standard normalizationpartial least squares(PLS)

董长言、于洪霞、孙兰香、李洋、刘修业、周平、黄少文

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State Key Laboratory of Robotics,Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,People's Republic of China

Key Laboratory of Networked Control Systems,Chinese Academy of Sciences,Shenyang 110016,People's Republic of China

Institutes for Robotics and Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang 110169,People's Republic of China

Shenyang University of Technology,Shenyang 110870,People's Republic of China

Shenyang Ligong University,Shenyang 110142,People's Republic of China

Shandong Iron and Steel Company Ltd.,Jinan 271105,People's Republic of China

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国家重点研发计划国家自然科学基金

2021YFB320240262173321

2024

10.1088/2058-6272/ad0c25

等离子体科学和技术(英文版)
中国科学院合肥物质科学研究所 中国力学学会

等离子体科学和技术(英文版)

EI
影响因子：0.297
ISSN：1009-0630
年,卷(期)：2024.26(2)
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