Abstract：The standard sample of stainless steel slag was hardly purchased in market. The determination of stainless steel slag sample by X-ray fluorescence spectrometry (XRF) with fusion sample preparation could not meet the requirements of rapid ladle analysis. Consequently, the certified reference materials of converter slag, blast furnace slag and open hearth slag as well as the production sample of stainless steel slag (which was certified using the reference method) were used to establish the calibration curve for XRF with fusion sample preparation, which was applied to the constant value analysis of stainless steel slag samples. The found results were used in the preparation of calibration curves for XRF determination with pressed powder pellet, realizing the rapid ladle analysis of CaO, SiO2, Al2O3, MnO, MgO, TFe, P2O5, TiO2, Cr2O3 and NiO in stainless steel slag. The sample preparation conditions, the precision and accuracy of method were investigated to guarantee the determination accuracy of stainless steel slag for the preparation of calibration curves. The analysis conditions of XRF with pressed powder pellet were obtained by experiments: the grinding time was 50 s; five granules of binding agent were added into 40 g of sample; tabletting pressure was 100 kN and the holding time was 15 s. The correlation coefficient of calibration curve of each component was higher than 0.999. The determination precision of one stainless steel slag sample by XRF with pressed powder pellet was investigated. The relative standard deviations (RSD) of components were between 0.43% and 4.6%. The accuracy test results indicated that the results of proposed method were consistent with those obtained by fusion sample preparation. However, the XRF with pressed powder pellet could meet the requirements of large amount and rapid analysis of stainless steel slag in ladle analysis.
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