Abstract：The content of impurities in graphite ore is related to the properties of graphite. The impurity components are usually determined by inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS) or classical wet chemical methods after acid dissolution or alkali fusion treatment. The process is complicated, and a lot of acid and base reagents are required. When X-ray fluorescence spectrometry (XRF) with pressed powder pellet sample preparation is adopted, the high content of carbon in the sample will lead to large deviations in the analysis results of other elements. The graphite ore samples were pre-cauterized at 1 000 ℃ for 2 h, and then the samples were prepared by fusion with Li2B4O7-LiBO2 (mass ratio of 67∶33) as the mixed flux. The contents of 10 impurities including SiO2, Al2O3, TFe2O3, MgO, CaO, Na2O, K2O, P2O5, MnO and TiO2 were determined by XRF. The calibration curve was established by selecting the national first-class certified reference materials with different carbon contents, and the linear correlation coefficients were all not less than 0.995 8. 10 components in graphite ore samples were determined according to the experimental method, and the relative standard deviations (RSD, n=12) were all less than 1%. 3 graphite ore samples with different fixed carbon contents were determined according to the experimental method, and the results were basically consistent with those obtained by the chemical wet methods in national standard.
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