The precise measurement of Al, Mg, Ca, and Zn composition in copper slag is crucial for effective process control of copper pyrometallurgy. In this study, a remote laser-induced breakdown spectroscopy(LIBS) system was...The precise measurement of Al, Mg, Ca, and Zn composition in copper slag is crucial for effective process control of copper pyrometallurgy. In this study, a remote laser-induced breakdown spectroscopy(LIBS) system was utilized for the spectral analysis of copper slag samples at a distance of 2.5 m. The composition of copper slag was then analyzed using both the calibration curve(CC) method and the partial least squares regression(PLSR) analysis method based on the characteristic spectral intensity ratio. The performance of the two analysis methods was gauged through the determination coefficient(R^(2)), average relative error(ARE), root mean square error of calibration(RMSEC), and root mean square error of prediction(RMSEP). The results demonstrate that the PLSR method significantly improved both R^(2) for the calibration and test sets while reducing ARE, RMSEC, and RMSEP by 50% compared to the CC method. The results suggest that the combination of LIBS and PLSR is a viable approach for effectively detecting the elemental concentration in copper slag and holds potential for online detection of the elemental composition of high-temperature molten copper slag.展开更多
对制备的七种不同湿度的岩屑样品进行实验,研究了水分含量对激光诱导岩屑等离子体特性的影响以及不同水分含量下样品中各元素浓度值的修正方法.实验分析了Ca II 422.67nm谱线强度随岩屑样品含水量的变化,通过Ca II和Al I各自四条谱线的...对制备的七种不同湿度的岩屑样品进行实验,研究了水分含量对激光诱导岩屑等离子体特性的影响以及不同水分含量下样品中各元素浓度值的修正方法.实验分析了Ca II 422.67nm谱线强度随岩屑样品含水量的变化,通过Ca II和Al I各自四条谱线的玻尔兹曼图计算了不同水分含量下的等离子体平均温度,并使用Lorentz拟合Ca II 422.67nm谱线获得了不同水分含量岩屑等离子体的电子密度.实验结果表明,随着水分含量的增加,光谱强度、等离子体温度和电子密度均线性降低,各元素自由定标模型定量分析结果有较大差异,但不同水分含量的岩屑等离子体均满足局部热力学平衡的Mc Whirter标准,自由定标模型可以用于不同水分含量岩屑样品的分析及影响的简单修正.展开更多
基金supported by funding for research activities of postdoctoral researchers in Anhui Provincespecial funds for developing Anhui Province’s industrial “three highs” and high-tech industries。
文摘The precise measurement of Al, Mg, Ca, and Zn composition in copper slag is crucial for effective process control of copper pyrometallurgy. In this study, a remote laser-induced breakdown spectroscopy(LIBS) system was utilized for the spectral analysis of copper slag samples at a distance of 2.5 m. The composition of copper slag was then analyzed using both the calibration curve(CC) method and the partial least squares regression(PLSR) analysis method based on the characteristic spectral intensity ratio. The performance of the two analysis methods was gauged through the determination coefficient(R^(2)), average relative error(ARE), root mean square error of calibration(RMSEC), and root mean square error of prediction(RMSEP). The results demonstrate that the PLSR method significantly improved both R^(2) for the calibration and test sets while reducing ARE, RMSEC, and RMSEP by 50% compared to the CC method. The results suggest that the combination of LIBS and PLSR is a viable approach for effectively detecting the elemental concentration in copper slag and holds potential for online detection of the elemental composition of high-temperature molten copper slag.
文摘对制备的七种不同湿度的岩屑样品进行实验,研究了水分含量对激光诱导岩屑等离子体特性的影响以及不同水分含量下样品中各元素浓度值的修正方法.实验分析了Ca II 422.67nm谱线强度随岩屑样品含水量的变化,通过Ca II和Al I各自四条谱线的玻尔兹曼图计算了不同水分含量下的等离子体平均温度,并使用Lorentz拟合Ca II 422.67nm谱线获得了不同水分含量岩屑等离子体的电子密度.实验结果表明,随着水分含量的增加,光谱强度、等离子体温度和电子密度均线性降低,各元素自由定标模型定量分析结果有较大差异,但不同水分含量的岩屑等离子体均满足局部热力学平衡的Mc Whirter标准,自由定标模型可以用于不同水分含量岩屑样品的分析及影响的简单修正.
