Ben Amar Ismail, Thomas Andrew, Bachmann Claus, Hafnaoui Anass, Griguer Hafid, Miled Amine, Messaddeq Younès
Department of Electrical and Computer Engineering, Université Laval, Quebec City, QC, Canada.
Digital Innovation Center of Excellence DICE, Mohammed VI Polytechnic University UM6P, Ben Guerir, Morocco.
Sci Rep. 2023 Oct 20;13(1):17925. doi: 10.1038/s41598-023-45181-5.
Online X-ray Fluorescence (XRF) setup was constructed and optimized for analysing the PO content in phosphate slurry (PS). Serval samples were analysed using two configurations of the setup, one with low and vertical flow and another with high and horizontal flow. The mean absolute error achieved through the first configuration was 0.87% and 0.38% using the second configuration. Reference samples were analyzed using the two configurations to construct the calibration curves. The curves cover a concentration range of PO from 13.50 to 18.50% when considering the horizontal flow configuration, and a range of 14.00-15.60% when considering the vertical flow setup. An experimental study was conducted in order to optimize the measurement parameters for the online measurement of PO in the phosphate slurry using the horizontal flow setup. A good signal-to-noise ratio (SNR) of [Formula: see text] was attained using an excitation energy of 20 kV or 25 kV, an excitation current of 600 µA, a distance of 18 mm between the sample and the detector, a measurement time of 60 s per spectrum and the use of an Aluminum filter between the X-ray tube and the measurement window. Online X-ray fluorescence analysis of P entails some challenges due to the low characteristic energy of P, the phosphate slurry matrix and the online analysis mode. However, the outcomes of this study indicate that XRF is a promising technology to meet the requirement for digitalization of chemical analysis of phosphate products.
构建并优化了在线X射线荧光（XRF）装置，用于分析磷矿浆（PS）中的PO含量。使用该装置的两种配置对多个样品进行了分析，一种是低流量垂直流动配置，另一种是高流量水平流动配置。通过第一种配置获得的平均绝对误差为0.87%，第二种配置为0.38%。使用这两种配置对参考样品进行分析以构建校准曲线。考虑水平流动配置时，曲线覆盖的PO浓度范围为13.50%至18.50%，考虑垂直流动配置时为14.00 - 15.60%。进行了一项实验研究，以优化使用水平流动配置在线测量磷矿浆中PO的测量参数。使用20 kV或25 kV的激发能量、600 µA的激发电流、样品与探测器之间18 mm的距离、每个光谱60 s的测量时间以及在X射线管和测量窗口之间使用铝滤光片，获得了[公式：见原文]的良好信噪比（SNR）。由于P的特征能量较低、磷矿浆基质以及在线分析模式，P的在线X射线荧光分析面临一些挑战。然而，本研究的结果表明，XRF是一种很有前途的技术，能够满足磷产品化学分析数字化的要求。
