Analysis of various components in alumina carbon refractory materials with X-ray fluorescence spectrometry after sample preparation by fusion

The sample was prepared by fusion using mixed oxidizing agents. The determination method of Al₂O₃, SiO₂, CaO, MgO, Fe₂O₃, Cr₂O₃ and TiO₂ in alumina carbon refractory materials by X-ray fluorescence spectrometry was established. The effect of mixed oxidizing agent ratio, oxidization time, flux and dilution ratio, release agent and loss on ignition on the sample preparation and analytical results were discussed. The pre-oxidization conditions were determined by orthogonal experiments: the ratio of Na₂O₂ and sample was 4:1, the ratio of NaNO₃ and sample was 2:1, and the pre-oxidization time was 90 min; when lithium tetraborate-lithium metaborate mixed flux (mass ratio of 67:33) was used with dilution ratio of 30:1 and ammonium iodide was used as the release agent, the sample reparation results were best; for the samples with large loss on ignition, they could be determined after ignition, and the ideal results could be obtained based on the loss on ignition and the measured results. It was verified that, the analytical precision of this method was good. The relative standard deviations (RSDs, n=9) of components were 0.29%-2.92%. The analytical results were in good agreement with those obtained by chemical method.