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首页> 外文会议>Conference on Applied Optics and Photonics China >Analysis of characteristics of Si in blast furnace pig iron and calibration methods in the detection by laser-induced breakdown spectroscopy
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Analysis of characteristics of Si in blast furnace pig iron and calibration methods in the detection by laser-induced breakdown spectroscopy

机译：高炉生铁中硅的特征分析及激光击穿光谱检测中的校准方法

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During the iron-making process in blast furnace, the Si content in liquid pig iron was usually used to evaluate the quality of liquid iron and thermal state of blast furnace. None effective method was found for rapid detecting the Si concentration of liquid iron. Laser-induced breakdown spectroscopy (LIBS) is a kind of atomic emission spectrometry technology based on laser ablation. Its obvious advantage is realizing rapid, in-situ, online analysis of element concentration in open air without sample pretreatment. The characteristics of Si in liquid iron were analyzed from the aspect of thermodynamic theory and metallurgical technology. The relationship between Si and C, Mn, S, P or other alloy elements were revealed based on thermodynamic calculation. Subsequently, LIBS was applied on rapid detection of Si of pig iron in this work. During LIBS detection process, several groups of standard pig iron samples were employed in this work to calibrate the Si content in pig iron. The calibration methods including linear, quadratic and cubic internal standard calibration, multivariate linear calibration and partial least squares (PLS) were compared with each other. It revealed that the PLS improved by normalization was the best calibration method for Si detection by LIBS.
机译：在高炉炼铁过程中，通常使用生铁中的Si含量来评估铁水的质量和高炉的热状态。没有找到有效的方法来快速检测铁水的硅浓度。激光诱导击穿光谱法（LIBS）是一种基于激光烧蚀的原子发射光谱技术。它的明显优势是无需进行样品预处理就可以快速，在线地在线分析空气中的元素浓度。从热力学理论和冶金技术的角度分析了铁水中硅的特性。根据热力学计算揭示了硅与碳，锰，硫，磷或其他合金元素之间的关系。随后，LIBS应用于这项工作中的生铁中硅的快速检测。在LIBS检测过程中，这项工作采用了几组标准生铁样品来校准生铁中的Si含量。将包括线性，二次方和三次内标校准，多元线性校准和偏最小二乘（PLS）的校准方法进行了比较。结果表明，归一化改进的PLS是LIBS检测硅的最佳校正方法。

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