Abstract：Since the composition of dust ash is complex, the one-by-one analysis is difficult. A variety of components in precipitator dust were determined by X-ray fluorescence spectrometry (XRF) with fusion sample preparation. Carbon was firstly removed at 950℃ in experiments. The sample was prepared by fusion method using Li2B4O7-LiBO2 (mass ratio of 2∶1) as flux, LiNO3 as oxidizer and LiBr solution as release reagent. The calibration curve was plotted using standard sample of iron ore. The reference reagent of ZnO was added into zinc-containing standard sample to enlarge the analysis range of Zn, thus to meet the determination requirements of Zn in various types of dust ash. The linear correlation coefficient of calibration curves of components were between 0.9981 and 0.9999. The proposed method was applied for the determination of TFe, SiO2, Al2O3, CaO, MgO, MnO, P, Na2O, K2O and Zn in one dust ash sample. The relative standard deviation (RSD, n=10) of determination results were between 0.071% and 1.7%. Ten components in five dust ash samples (including blast furnace dust, converter dust and sludge, etc) were determined according to the experimental method. The found results were consistent with those obtained by wet chemical method.
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