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Название X-ray fluorescence method in analytical control of phosphogypsum processing technology
DOI 10.17580/tsm.2016.10.12
Автор Kozlov A. S., Tsyrenova A. D., Bogatyreva E. V., Filichkina V. A.
Информация об авторе

National University of Science and Technology “MISiS”, Moscow, Russia:

A. S. Kozlov, Post-Graduate Student of a Chair of Certification and Analytical Control, e-mail: kozlovas44@gmail.com
A. D. Tsyrenova, Engineer of a Chair of Non-Ferrous Metals and Gold
E. V. Bogatyreva, Assistant Professor of a Chair of Non-Ferrous Metals and Gold
V. A. Filichkina, Head of a Chair of Certification and Analytical Control


The development results for phosphogypsum and the products of its leaching chemical composition determination method are presented in the work. Main difficulties that appears in the process of rare earth metals determination in phosphogypsum and its leaching products (including their quantity, spectral folding, matrix effects and some specifics of modern Х-ray spectrometers) are considered. This work is introduced with an increased focus on critical values of rare earth elements concentrations in the investigated objects. The measurements were made with ARL Optim’X spectrometer. Work samples certified using optical-emission spectrometry were used. Calibration curves with a high level of linearity for Nd, La, Ce, Pr and Y (recalculated into oxides) were obtained using present certified reference materials. Rare earth element concentrations ranges, calculated values of detections limits, standard errors of estimate and correlation coefficients for calibration curves are presented. Spectral folding and matrix effects are taken into account, thus providing better accuracy of determination. Use of L-series lines intensity as an analytical signal simplifies the choice of analysis parameters due to application of rather low accelerating voltage and widespread types of analyzing crystals (LiF 200). The obtained results show the applicability of Х-ray fluorescence spectrometry for express determination of rare earth elements in phosphogypsum and its leaching products.
This work was carried out within the agreement between the National University of Science and Technology “MISiS” and All-Russian Scientific-Research Institute of Chemical Technology (Moscow, Russia) No. 1/2012 (November 20, 2012), realized with the financial support of the order of the Government of Russian Federation No. 218 (April 09, 2010).

Ключевые слова X-ray fluorescence spectral analysis, phosphogypsum, rare-earth metals, analytical control, spectral folding, threshold of detectability, expresscontrol of content, ARL Optim’X
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