Abstract：The content of ferrous iron is an important index in iron and steel smelting, and should be strictly controlled. In the past, the ferrous iron is usually determined by chemical method which has some disadvantages such as tedious operation and time consumption. With the development of analytical instrument and the appearance of new data process techniques, the detection efficiency of ferrous iron can be improved by X-ray fluorescence spectrometry (XRF) combined with spectrum processing with continuous wavelet transform.The valence of iron in iron ore was studied using the ratio between coefficient maximum of FeKβ spectrum after continuous wavelet transform and the net integral strength of FeKβ spectrum. The results showed that this ratio was only related to the relative content of Fe2+ and Fe3+. Then the relationship between this ratio and FeO/T.Fe (the content ratio between ferrous iron and total ion) was established by linear regression using iron ore samples. The effect of wavelet function selection, characteristic point selection and testing spectral line on the precision of determination results was discussed. Two iron ore samples were used for precision test. The relative standard deviations (RSD, n=7) of determination results of FeO were both less than 3%. The determination results of FeO in actual iron ore sample were consistent with those obtained by national standard method. Two methods showed good comparability. The proposed method could provide technological base for the establishment of new standards.
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