激光诱导击穿光谱快速分析炉渣

Rapid Analysis of Slags by Laser Induced Breakdown Spectroscopy

将激光诱导击穿光谱(LIBS)应用于钢铁冶炼过程中炉渣的快速分析。针对钢铁生产的实际需要对分析装置提出了新的设计,并自主开发了分析软件,实现了整套分析装置的自动操作和控制、光谱数据的预处理、定标曲线的线性拟合以及最终的分析结果的直接显示。分析用样品可从熔融态炉渣中直接取出,也可采用压片制样。选取不同类别的标准样品分别建立定标曲线有利于提高分析结果的准确性。定标模型的RMSEC和RMSECV分别为0.187,0.275。按所建立的方法对保护渣样品中镁含量连续进行10次测定,测定结果在0.205%~0.209%之间,表明此方法的精密度较高。

Laser induced breakdown spectroscopy was applied to the rapid analysis of slags in coordination with the steel-smelting process.Aiming to the necessity of practice of steel production,a novel designing for the analytical instrumentation was proposed and an initiative development of an analytical software was also made to accomplish automation and control of the analytical instrumentation,pretreatment of spectrometric data,linearfitting of calibration curves,and finally direct displaying of analytical results.Samples for analysis were prepared either by direct sampling from the molten slag or by the pressing method.Accuracy of analytical results was found to be improved by using standard samples of different species in preparation of different calibration curves.Values of RMSEC and RMSECV of the calibration model were found to be 0.187 and 0.275 respectively.Content of Mg in a sample of protective slag was determined by the proposed method for 10 parallel determinations,giving results ranged from 0.205%to 0.209%,showing high precision of the method.