X-ray fluorescence spectrometry is a fast and accurate method of analysis that meets all the modern requirements of the metallurgical industry. The article presents an integrated approach implemented in the Simultix15 Rigaku multichannel X-ray fluorescence spectrometer with wavelength dispersion. For the quantitative determination of the content of ferrous oxide in the iron ore agglomerate, the spectrometer provides a mode using X-ray diffraction. Other components of the samples are determined on the same instrument using X-ray spectral channels. Calibration plots and repeatability test results are shown.