Development of X-Ray Fluorescence Analysis Technique Starting Metallurgical Mixtures

Purpose of the study. To study the conditions for determining the normalized components SiO₂, Cr₂O₃, Al₂O₃, Fe₂O₃, MgO in starting metallurgical mixtures by X-ray fluorescence spectrometry. Justify the method of sample preparation for analysis by pressing and fusion. Set the optimal parameters of the device, allowing for precise determination of normalized components in starting mixtures. To develop a technique for X-ray fluorescence analysis of metallurgical starting mixtures. Evaluate the reproducibility and correctness of the determination of normalized components. Methods. The determination of SiO₂, Cr₂O₃, Al₂O₃, Fe₂O₃, MgO was carried out on a ZSX Primus IV X-ray fluorescence wave-dispersive spectrometer (Rigaku, Japan), sample preparation was carried out by pressing the analyzed sample on a boric acid substrate (Herzog hydraulic press, Germany) and fusion (Katanax fusion furnace, Canada). The parameters of the X-ray fluorescence spectrometer have been optimized for the precise determination of normalized components. The parameters of calibration curves for the determination of oxides in starting mixtures have been established. 

Results. A technique has been developed for the simultaneous determination of all normalized components in starting mixtures CCT-X, CCT-2, Borstart, Start-RMK-SSC, Theramer Fill 135, which are most commonly used in metallurgical production. Due to the lack of standard samples of metallurgical starting mixtures, the assessment of reproducibility and accuracy of determination was carried out using standard samples that are as close as possible in composition to the analyzed samples and production samples that were previously analyzed according to the methods recommended by GOST. The developed technique for X-ray fluorescence analysis of metallurgical starting mixtures can be recommended for use in laboratories of metallurgical enterprises.

Conclusion. The developed method does not contain systematic errors and is characterized by high precision, allows you to quickly and reliably carry out the simultaneous determination of normalized components in starting mixtures, reduces the consumption of reagents compared to currently used methods of analysis in practice.

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