Abstract：The composition of continuous casting mold powder is complicated, and the determination by X-ray fluorescence spectrometry(XRF) with pressed powder pellets is seriously affected by matrix effect. The sample was burned at 1 100 ℃ for 2 h to determine loss on ignition. The sample was pre-oxidized with NH4NO3 at 600 ℃ for 10 min. Then the oxidized sample was mixed with NH4NO3 and Li2B4O7-LiBO2 mixed flux (m:m=67:33) at mass ratio of 1:2:10 for sample preparation by fusion method. The results indicated that the fused bead station was good. The calibration curves were plotted with special oxide reference materials. The matrix effect and spectral interference were eliminated by mathematical regression, fundamental parameter and theoretical influence coefficient methods. The correlation coefficients of calibration curves were higher than 0.999. Thus a rapid determination method of SiO2, Al2O3, CaO, MgO, K2O, Na2O and TFe in continuous casting mold powder by X-ray fluorescence spectrometry with fusion sample preparation was established. The precision test was conducted with one continuous casting mold powder sample, the relative standard deviations (RSD, n=10) of seven components were all less than 2%. The accuracy test results indicated that the determination results by the proposed method were consistent with those obtained by other methods.
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